TW202229092A - Bicycle part and method of forming bicycle part - Google Patents

Abstract

A bicycle part includes a housing and a lid. The housing includes an inner peripheral portion, an outer peripheral portion, an end wall portion and a connecting portion. The outer peripheral portion is spaced radially outward from the inner peripheral portion with respect to a center axis of the enclosed area. The end wall portion interconnects the inner peripheral portion and the outer peripheral portion to at least partly define an internal space. The connecting portion interconnects the inner peripheral portion and the outer peripheral portion. The lid overlies the internal space. The lid is welded to the inner peripheral portion along an inner weld path and the outer peripheral portion along an outer weld path. The lid is further welded to at least part of the connecting portion of the housing a connecting weld path connecting the inner weld path and the outer weld path.

Description

Bicycle component and method of forming a bicycle component

The present disclosure generally relates to a bicycle component and a method of forming a bicycle component.

Generally speaking, bicycle components often have many parts that need to be grouped together as a unit. In some cases, the bicycle component includes a housing and a cover or cover for housing other parts of the bicycle component. For example, US Patent No. 6,418,797 (assigned to Shimano Corporation) discloses a bicycle hub having an electronic unit having a housing and a cover for accommodating a printed circuit board. Typically, the cover is attached to the housing by means of a plurality of screws.

In general, the present disclosure relates to various features of bicycle components for bicycles. An object of the present disclosure is to weld the cover to the casing by continuous welding.

In view of the state of the art and in accordance with a first aspect of the present disclosure, there is provided a bicycle component that basically includes a housing and a cover. The casing includes an inner peripheral portion, an outer peripheral portion, an end wall portion and a connecting portion. The inner perimeter at least partially defines an enclosed area. The outer perimeter is spaced radially outward from the inner perimeter relative to the central axis of the enclosed area. The end wall portion interconnects the inner and outer perimeter portions to at least partially define the interior space. The connecting portion interconnects the inner peripheral portion and the outer peripheral portion. A cover body covers the inner space of the casing. The cover body is joined to the inner peripheral portion of the housing by welding along the inner welding path. The cover body is joined to the outer peripheral portion of the casing by welding along the outer welding path. The cover is joined to at least a portion of the connecting portion of the housing by welding along a connecting welding path connecting the inner welding path and the outer welding path.

With the bicycle component according to the first aspect, an improved weld can be formed between the housing and the cover, thereby avoiding deformation of the cover caused by the welding process.

According to a second aspect of the present disclosure, the bicycle component according to the first aspect is constructed such that the inner weld path includes a partially circular portion and the outer weld path includes a partially circular portion.

With the bicycle component according to the second aspect, the inner and outer beads can be easily formed between the housing and the cover.

According to a third aspect of the present disclosure, the bicycle component according to the second aspect is constructed such that the partially inner circular portion and the partially outer circular portion are arranged concentrically.

With the bicycle component according to the third aspect, the inner peripheral portion and the outer peripheral portion can be arranged concentrically so that the bicycle component can be rotated.

According to a fourth aspect of the present disclosure, the bicycle component according to any one of the first to third aspects is constructed such that the connection weld path includes a first connection weld and a second connection weld, the first connection weld and the second connection The welding portion connects the inner welding path and the outer welding path.

With the bicycle component according to the fourth aspect, the welding path can be easily formed.

According to a fifth aspect of the present disclosure, the bicycle component according to any one of the first to fourth aspects is constructed such that the inner weld path, the outer weld path, and the connecting weld path form a continuous weld path.

With the bicycle component according to the fifth aspect, the lid can be welded to the housing without stopping the laser beam.

According to a sixth aspect of the present disclosure, the bicycle component according to the fifth aspect is constructed such that the continuous welding path is a closed loop.

With the bicycle component according to the sixth aspect, the cover body can be firmly attached to the housing.

According to a seventh aspect of the present disclosure, the bicycle component according to any one of the first to sixth aspects further includes an electronic circuit board provided in the inner space of the housing.

With the bicycle component according to the seventh aspect, the electronic circuit board can be more reliably protected.

According to an eighth aspect of the present disclosure, the bicycle component according to the seventh aspect further includes a power storage provided in the interior space of the housing at a location other than the electronic circuit board.

With the bicycle component according to the eighth aspect, it is possible to secure a large space for configuring the power storage and minimize the electronic unit.

According to a ninth aspect of the present disclosure, the bicycle component according to any one of the first to eighth aspects is constructed such that the closed area is an opening.

With the bicycle component according to the ninth aspect, it is possible to increase the degree of freedom in arranging the component in the opening and to facilitate compact storage of the electronic unit. These components may be axles or axles constructed to support bicycle components.

According to a tenth aspect of the present disclosure, the bicycle component according to any one of the first to ninth aspects further includes a hub axle, a hub body, and a power generator. The hub axle supports the housing. The hub body is rotatably provided about the central axis. The electric power generator is disposed in the hub body and is configured to generate electric power by the rotation of the hub body.

With the bicycle component according to the tenth aspect, the electronic unit can be stored in the hub equipped with the power generator.

According to an eleventh aspect of the present disclosure, the bicycle component according to the tenth aspect is constructed such that the housing is non-rotatable relative to the hub axle.

With the bicycle component according to the eleventh aspect, damage to the bicycle component can be avoided, noise is minimized and wiring to the electronic unit is allowed to be more reliable.

According to a twelfth aspect of the present disclosure, the bicycle component according to the tenth or eleventh aspect further includes a sprocket support structure rotatably disposed about a center axis to drive the drive when rotated about the center axis in the drive rotational direction The force is transmitted to the hub body.

With the bicycle component according to the twelfth aspect, the electronic unit can be stored in the hub having the sprocket support structure.

According to a thirteenth aspect of the present disclosure, the bicycle component according to any one of the tenth to twelfth aspects further includes a detected component and a rotation detection sensor. The inspected part is provided to the sprocket support structure. A rotation detection sensor is provided in the inner space of the housing. A rotation detection sensor is configured to detect the detected component to detect rotation of the sprocket support structure about the central axis.

With the bicycle component according to the thirteenth aspect, the rotation of the sprocket support structure can be detected.

According to a fourteenth aspect of the present disclosure, there is provided a bicycle component that basically includes a housing, an electronic circuit board, and a power storage. The housing includes an inner peripheral portion, an outer peripheral portion, and an end wall portion. The inner perimeter at least partially defines an enclosed area. The outer perimeter is spaced radially outward from the inner perimeter relative to the central axis of the enclosed area. The end wall portion interconnects the inner and outer perimeter portions to at least partially define the interior space. An electronic circuit board is provided in the inner space of the housing. The electronic circuit board includes at least one arc-shaped edge corresponding to an arc-shaped surface of one of the inner peripheral portion and the outer peripheral portion of the housing, and the electronic circuit board includes at least one electronic component. A power storage is provided in the interior space of the housing off the electronic circuit board and is electrically connected to the at least one electronic component.

With the bicycle component according to the fourteenth aspect, the bicycle component can be relatively compact, have its own power for at least one electronic component of the electronic circuit board, and require no power from an external power source.

According to a fifteenth aspect of the present disclosure, the bicycle component according to the fourteenth aspect is constructed such that the at least one arcuate edge includes at least one of an inner arcuate edge and an outer arcuate edge, the inner arcuate edge corresponding to the The inner arcuate surface of the inner peripheral portion, the outer arcuate edge corresponding to the outer arcuate surface of the outer peripheral portion of the housing.

With the bicycle component according to the fifteenth aspect, the bicycle component may be arranged on an axle or an axle. The gap between the electronic board and the housing can be reduced to increase the area of the circuit board placed in the housing.

According to a sixteenth aspect of the present disclosure, the bicycle component according to the fourteenth or fifteenth aspect further includes a cover body that covers the inner space of the housing and is coupled to the housing.

With the bicycle component according to the sixteenth aspect, by providing the cover to the case, the components in the case can be more reliably protected.

According to a seventeenth aspect of the present disclosure, the bicycle component according to any one of the fourteenth to sixteenth aspects is constructed such that the power storage includes at least one capacitor.

With the bicycle component according to the seventeenth aspect, electric power can be stored inexpensively and in a small space in the bicycle component.

According to an eighteenth aspect of the present disclosure, the bicycle component according to any one of the fourteenth to seventeenth aspects is constructed such that the closed area is an opening.

With the bicycle component according to the eighteenth aspect, the bicycle component may be supported on an axle or axle.

According to a nineteenth aspect of the present disclosure, the bicycle component according to any one of the fourteenth to eighteenth aspects further includes a hub axle, a hub body, and a power generator. The hub axle supports the housing. The hub body is rotatably provided about the central axis. The electric power generator is disposed in the hub body and is configured to generate electric power by the rotation of the hub body.

With the bicycle component according to the nineteenth aspect, the bicycle component may be a bicycle hub that generates electricity.

According to a twentieth aspect of the present disclosure, the bicycle component according to the nineteenth aspect is constructed such that the housing is non-rotatable relative to the hub axle.

With the bicycle component according to the twentieth aspect, by arranging the housing non-rotatably with respect to the hub axle, damage to the bicycle component can be avoided and noise can be minimized.

According to a twenty-first aspect of the present disclosure, the bicycle component according to the nineteenth or twentieth aspect further includes a sprocket support structure rotatably disposed about the central axis to rotate in the driving rotational direction about the central axis The driving force is transmitted to the hub body.

With the bicycle component according to the twenty-first aspect, the bicycle component may be a rear hub driven by a driving force.

According to a twenty-second aspect of the present disclosure, the bicycle component according to any one of the nineteenth to twenty-first aspects is constructed such that the at least one electronic component includes a rotation detection sensor that is Constructed to detect the detected component to detect rotation of the sprocket support structure about the central axis.

With the bicycle component according to the twenty-second aspect, the rotation of the sprocket support structure can be reliably detected.

According to a twenty-third aspect of the present disclosure, a method of forming a bicycle component having a housing and a cover coupled to the housing is performed. The method includes covering a cover on a casing; and by following an inner welding path corresponding to an inner circumference of the casing, along an outer welding path corresponding to an outer circumference of the casing, and along an inner welding path corresponding to the outer circumference of the casing The cover body is welded to the casing with the weld bead formed by at least one connecting welding path of the connecting portion of the casing. The connecting welding path connects the inner welding path and the outer welding path.

With the method according to the twenty-third aspect, the cover body can be welded to the housing while avoiding deformation of the cover body caused by the welding process.

According to a twenty-fourth aspect of the present disclosure, the method according to the twenty-third aspect is performed, thereby performing welding of the cover to the housing using a laser beam.

With the method according to the twenty-fourth aspect, the cover body can be welded to the housing while avoiding deformation of the cover body caused by the welding process.

According to a twenty-fifth aspect of the present disclosure, the method according to the twenty-third or twenty-fourth aspect is performed, whereby the welding of the cover to the housing is carried out by a continuous welding path comprising the At least one connects the welding path, the inner welding path and the outer welding path.

With the method according to the twenty-fifth aspect, the lid can be welded to the housing without stopping the laser beam.

According to a twenty-sixth aspect of the present disclosure, the method according to the twenty-fifth aspect is performed such that the continuous welding path is a closed loop.

With the method according to the twenty-sixth aspect, the cover body can be firmly attached to the housing.

According to a twenty-seventh aspect of the present disclosure, the method according to the twenty-fifth or twenty-sixth aspect is performed, whereby the at least one connection welding path includes a first connection welding portion connecting the inner welding path and the outer welding path and The second connection welding part.

With the method according to the twenty-seventh aspect, the welding process can be easily performed without stopping the laser beam, wherein the inner bead and the outer bead are formed between the housing and the cover.

Moreover, other objects, features, aspects, and advantages of the disclosed bicycle components will be apparent to those skilled in the art from the following detailed description in conjunction with the accompanying drawings that disclose preferred embodiments of the bicycle components.

Selected embodiments will now be described with reference to the drawings. It will be apparent to those skilled in the bicycle art from this disclosure that the following descriptions of the embodiments are provided for illustration only, and are not intended to limit the invention as defined by the appended claims and their equivalents.

Referring first to FIG. 1 , a bicycle V (ie, a human-powered vehicle) is shown equipped with a bicycle component 10 according to the illustrated embodiment. Here, in the illustrated embodiment, the bicycle component 10 is a bicycle hub. More specifically, the bicycle component 10 is a bicycle rear hub. Also here, in the illustrated embodiment, the bicycle component 10 is a hub dynamo for providing electrical power to one or more elements of the bicycle V. However, the bicycle component 10 is not limited to a hub generator. In particular, certain aspects of hub bicycle components may be provided for bicycle components that do not generate electricity. Additionally, while bicycle component 10 is shown as a rear hub, certain aspects of bicycle component 10 may be provided for a front hub. Therefore, the bicycle component 10 is not limited to the rear hub.

Here, the bicycle V is an electric-assisted bicycle (E-bike). Alternatively, bicycle V may be a road bicycle, city bicycle, cargo bicycle, recumbent bicycle, or other type of off-road bicycle, such as a cyclocross bicycle. As shown in FIG. 1 , the bicycle V includes a body VB supported by a rear wheel RW and a front wheel FW. The body VB basically includes a front frame body FB and a rear frame body RB (swing arm). The body VB is also provided with a handlebar H and a front fork FF for steering the front wheel FW. The rear frame body RB is swingably mounted to the rear section of the front frame body FB so that the rear frame body RB can pivot relative to the front frame body FB. The rear wheel RW is mounted to the rear end of the rear frame body RB. The rear shock absorber RS is operably disposed between the front frame body FB and the rear frame body RB. A rear shock absorber RS is provided between the front frame body FB and the rear frame body RB to control the movement of the rear frame body RB relative to the front frame body FB. That is, the rear shock absorber RS absorbs the shock transmitted from the rear wheel RW. The rear wheel RW is rotatably mounted to the rear frame body RB. The front wheel FW is attached to the front frame body FB via the front fork FF. That is, the front wheel FW is mounted on the lower end of the front fork FF. The height adjustable seatpost ASP is conventionally mounted to the seat tube of the front frame body FB and supports the bicycle seat or saddle S in any suitable manner. The front fork FF is pivotally mounted to the head tube of the front frame body FB. The handlebar H is mounted on the upper end of the steering column or steering tube of the front fork FF. The front fork FF absorbs the shock transmitted from the front wheel FW. Preferably, the rear shock absorber RS and the front fork FF are electrically adjustable suspensions. For example, the stiffness and/or stroke length of the rear shock absorber RS and the front fork FF can be adjusted.

The bicycle V also includes a driveline DT and an electric drive unit DU operably coupled to the driveline DT. Here, for example, the power train DT is a chain drive type, which includes a crank C, a front sprocket FS, a plurality of rear sprockets CS, and a chain CN. The crank C includes a crank shaft CA1 and a pair of crank arms CA2. The crankshaft CA1 is rotatably supported to the front frame body FB via the electric drive unit DU. The crank arm CA2 is provided at the opposite end of the crank shaft CA1. A pedal PD is rotatably coupled to the distal end of each crank arm CA2. The drive train DT can be selected from any type and can be of belt drive type or shaft drive type.

The electric drive unit DU has an electric motor that provides a drive assist force to the front sprocket FS. The electric drive unit DU can be actuated in a conventional manner to assist the propulsion of the bicycle V. For example, the electric drive unit DU is actuated according to the human driving force applied to the pedal PD. The electric drive unit DU is driven by electricity supplied by the main battery pack BP mounted on the down tube of the bicycle V. The main battery pack BP provides electrical power to other vehicle components such as the rear derailleur RD, height adjustable seatpost ASP, rear shock absorber RS, front fork FF and any other vehicle components that use electricity.

The bicycle V also includes the bicycle computer SC. Here, the bicycle computer SC is attached to the front frame body FB. Alternatively, the bicycle computer SC is available on the handlebar H. The bicycle computer SC notifies the rider of various running and/or operating conditions of the bicycle V. The bicycle computer SC may also include various control programs for automatically controlling one or more bicycle elements. For example, the bicycle computer SC may be provided with an automatic shift program for changing the gear position of the rear derailleur RD in accordance with one or more driving and/or operating conditions of the bicycle V.

Here, the bicycle V also includes a rear derailleur RD attached to the rear frame body RB for moving the chain CN between the rear sprockets CS. The rear derailleur RD is a type of shifting device. Here, the rear derailleur RD is an electric derailleur (ie, an electric shifting device or an electric transmission). Here, the rear derailleur RD is provided on the rear side of the rear frame body RB close to the bicycle part 10 . When the rider of the bicycle V manually operates the shift operating device or the derailleur SL, the rear derailleur RD can be operated. The rear derailleur RD may also be operated automatically according to the driving and/or operating conditions of the bicycle V. The bicycle V may also include a plurality of electronic components. During the power supply state as discussed herein, some or all of the electronic components may be supplied with power generated by the bicycle component 10 .

The structure of the bicycle component 10 will now be described with particular reference to FIGS. 2 to 4 . Here, the bicycle component 10 includes a hub axle 12 and a hub body 14 . The hub axle 12 has a center axis A1. The hub axle 12 is constructed to be non-rotatably attached to the body VB. In this embodiment, the hub axle 12 is constructed to be non-rotatably attached to the rear frame body RB. The hub body 14 is rotatably provided around the center axis A1. The hub body 14 is rotatably provided around the center axis A1. In other words, the hub body 14 is rotatably mounted about the hub axle 12 .

As shown in FIGS. 2 to 4 , the hub axle 12 is a rigid member made of a suitable material such as a metallic material. Here, the hub axle 12 is a tubular member. The hub axle 12 may be a one-piece member or made from several pieces. Here, the hub axle 12 includes a main body 12a and an end piece 12b. The end piece 12b is threaded to the first end (right side in Figures 2 to 4) of the main body 12a. In this way, the second end (left side in FIGS. 2 to 4 ) of the main body 12a and the end piece 12b are received in the mounting opening of the rear frame body RB, as shown in FIG. 2 . Here, the hub axle 12 also includes a rotation limiting member 12c coupled to the main body 12a via an end piece 12b. The rotation restricting member 12c is engaged with the rear frame body RB, thereby restricting the rotation of the hub axle 12 relative to the rear frame body RB.

Here, as shown in FIG. 2 , the bicycle component 10 further includes a wheel holding mechanism 16 for fixing the hub axle 12 of the bicycle component 10 to the rear frame body RB. The wheel retention mechanism 16 basically includes a shaft or skewer 16a, a cam body 16b, a cam lever 16c, and an adjustment nut 16d. The cam lever 16c is attached to one end of the string rod 16a by the cam body 16b, and the adjusting nut 16d is screwed to the other end of the string rod 16a. A lever 16c is attached to the cam body 16b. The cam body 16b is coupled between the string rod 16a and the cam rod 16c to move the rod 16a relative to the cam body 16b. Therefore, the rod 16c is operated to move the string rod 16a relative to the cam body 16b in the axial direction of the center axis A1 to change the distance between the cam body 16b and the adjusting nut 16d. Preferably, compression springs are provided at each end of the string 16a. Alternatively, the hub axle 12 may be non-rotatably attached to the rear frame body RB by other attachment structures as needed and/or desired.

As shown in FIGS. 1 and 4 , the hub body 14 is rotatably mounted around the hub shaft 12 so as to rotate in the driving rotational direction D1. The driving rotation direction D1 corresponds to the forward driving direction of the rear wheel RW. The hub body 14 is constructed to support the rear wheel RW in a conventional manner. More specifically, in the illustrated embodiment, the hub body 14 includes a first outer flange 14a and a second outer flange 14b. The first outer flange 14a and the second outer flange 14b extend radially outward with respect to the central axis A1. The first outer flange 14a and the second outer flange 14b are configured to receive a plurality of spokes ( FIG. 1 ) for connecting the rim of the rear wheel RW ( FIG. 1 ) to the hub body 14 . In this way, the hub body 14 and the rear wheel RW are coupled to rotate together.

Here, the bicycle component 10 also includes a sprocket support structure 18 . In the illustrated embodiment, the sprocket support structure 18 supports the rear sprocket CS, as shown in FIG. 2 . The sprocket support structure 18 is rotatably provided about the central axis A1 to transmit the driving force to the hub body 14 when rotated in the driving rotational direction D1 about the central axis A1. As described below, the sprocket support structure 18 does not transmit a driving force to the hub body 14 when it rotates in the non-driving rotational direction D2 about the central axis A1. The non-driving rotational direction D2 is opposite to the driving rotational direction D1 with respect to the central axis A1. The central axis of rotation of the sprocket support structure 18 is arranged concentrically with the central axis A1 of the hub axle 12 .

Although the sprocket support structure 18 is constructed to non-rotatably support the rear sprocket CS, the sprocket support structure 18 is not limited to the illustrated embodiment. Alternatively, one or more rear sprockets CS may be integrally formed with the sprocket support structure 18 . In any event, the sprocket support structure 18 and the rear sprocket CS are coupled together for common rotation in both the driving rotational direction Dl and the non-driving rotational direction D2.

As shown in FIGS. 3 and 4 , the bicycle component 10 includes a housing 20 . The housing 20 is constructed to accommodate various electronic components. The housing 20 defines an inner space 23 having an annular shape. In the embodiment shown, the bicycle component 10 includes an electronic circuit board ECB and a power storage PS. The electronic circuit board ECB is provided in the inner space 23 of the housing 20 . The power storage PS is provided at a position other than on the electronic substrate ECB in the inner space 23 of the housing 20 . The electronic circuit board ECB is electrically connected to the power storage PS for controlling the input and output of power from the power storage PS. The first cable EC1 is electrically connected at one end to the electronic circuit board ECB. The other end of the first cable EC1 is electrically connected to another electronic component of the bicycle V, such as the rear derailleur RD, the battery pack BP or an electrical connector. In this way, the first electrical cable EC1 can supply the electric power generated by the bicycle component 10 to the rear derailleur RD, the battery pack BP or other electronic components. The first cable EC1 can also be used to transmit signals using power line transmission (PLC).

The hub axle 12 supports the housing 20 . Here, the housing 20 is not rotatable relative to the hub axle 12 . The bicycle component 10 also includes a cover 22 . The cover 22 is coupled to the housing 20 by welding, as described below. Preferably, the housing 20 and the cover 22 are rigid members made of suitable materials. For example, the case 20 and the lid body 22 are made of resin material. For example, each of the housing 20 and the lid 22 may be injection-molded members. The cover body 22 covers the inner space 23 of the case 20 and is coupled to the case 20 .

The electronic circuit board ECB includes at least one electronic component. Thus, at least the housing 20 , the cover body 22 and the electronic circuit board ECB define the electronic unit EU arranged in the hub body 14 . The power storage PS is electrically connected to the at least one electronic component. In the illustrated embodiment, the bicycle component 10 also includes a detected component 24 and a rotation detection sensor 25 . The inspected component 24 is provided on the sprocket support structure 18 . On the other hand, a rotation detection sensor 25 is provided in the inner space 23 of the housing 20 . The rotation detection sensor 25 is configured to detect the detected member 24, thereby detecting the rotation of the sprocket support structure 18 about the central axis A1. In other words, the at least one electronic component includes a rotation detection sensor 25 configured to detect the detected component 24 to detect the rotation of the sprocket support structure 18 about the central axis A1. Since the rotation detection sensor 25 is on the electronic circuit board ECB, the rotation detection sensor 25 does not rotate relative to the hub axle 12 . As seen in FIG. 4 , a rotation detection sensor 25 is provided in the hub body 14 at a position spaced radially outward from the hub axle 12 .

In the embodiment shown, the rotation detection sensor 25 includes a magnetic sensor, and the detected component 24 includes a magnet. Thus, the magnetic sensor detects the movement of the magnets that rotate with the sprocket support structure 18 . In other words, with this configuration, the rotation detection sensor 25 is configured to detect the detected member 24 to detect the rotation of the sprocket support structure 18 about the center axis A1. Here, the magnet of the detection-receiving member 24 is a ring-shaped member in which S-pole segments and N-pole segments alternate. In this way, the rotation detection sensor 25 can detect the rotation amount and rotation direction of the sprocket support structure 18 . As used herein, the term "sensor" refers to a hardware device or instrument designed to detect the presence or absence of a particular event, object, substance, or changes in its environment, and to emit a signal in response. As used herein, the term "sensor" does not include humans. The rotation detection sensor 25 receives power from the power storage PS.

As shown in FIG. 3 , the bicycle component 10 also includes a power generator 26 . The power generator 26 is disposed within the hub body 14 and is configured to generate electricity by rotation of the hub body 14 . More specifically, the power generator 26 is provided in the hub body 14 between the hub axle 12 and the center portion of the hub body 14 . The power generator 26 is configured to generate power by rotation of the hub body 14 relative to the hub axle 12 . The electronic circuit board ECB is electrically connected to the power generator 26 for controlling the power output of the power generator 26 . In particular, the second cable EC2 electrically connects the electronic circuit board ECB to the power generator 26 .

The power generator 26 basically includes an armature 28 (ie, the stator in the illustrated embodiment) and magnets 30 (ie, the rotor in the illustrated embodiment). Although the armature 28 is shown fixed relative to the hub axle 12 and the magnets 30 are shown fixed relative to the hub body 14 , the armature 28 may be fixed relative to the hub body 14 and the magnets 30 may be fixed relative to the hub axle 12 . The armature 28 includes a first yoke 28A, a second yoke 28B, and a coil 28C. The first yoke 28A includes two or more first yoke pieces that are arranged in the circumferential direction of the hub shaft 12 . Likewise, the second yoke 28B includes two or more second yokes which are arranged in the circumferential direction of the hub axle 12 and alternate with the first yokes of the first yoke 28A. The coil 28C is located between the first yoke 28A and the second yoke 28B. The magnet 30 includes a plurality of first magnetic members 30A and a plurality of second magnetic members 30B disposed within the tubular support 32 . The tubular support 32 is fixedly coupled within the hub body 14 such that the magnets 30 and the hub body 14 rotate together about the hub axle 12 . The first magnetic member 30A and the second magnetic member 30B are arranged so that the S poles and the N poles of the first magnetic member 30A and the second magnetic member 30B are alternately arranged in the circumferential direction of the hub shaft 12 . Therefore, in the axial direction of the shaft member 12, the S pole of the first magnetic member 30A and the S pole of the second magnetic member 30B are not aligned, and the N pole of the first magnetic member 30A and the N pole of the second magnetic member 30B are not aligned. Align.

The electronic circuit board ECB also includes an electronic controller 42 provided on the electronic circuit board ECB. The electronic controller 42 is configured to receive the detection signal from the rotation detection sensor 25 . Electronic controller 42 includes at least one processor that executes a predetermined control program. The at least one processor can be, for example, a central processing unit (CPU) or a micro processing unit (MPU). The terms and "electronic controller" as used herein refer to hardware that executes software programs, and does not include humans. Electronic controller 42 receives power from power generator 26 . Electronic controller 42 is configured to control the power generated by power generator 26 .

The power storage PS is held at a position other than the electronic circuit board ECB in the inner space 23 of the housing 20 . Here, the power storage PS is directly attached to the housing 20 by adhesive or the like. Preferably, the power storage PS comprises at least one capacitor. Here, the power storage PS includes a first capacitor 44 and a second capacitor 46 . Electronic controller 42 is configured to control the storage of power generated by power generator 26 in first capacitor 44 and second capacitor 46 . Electronic controller 42 is configured to control the distribution of power stored in first capacitor 44 and second capacitor 46 to other components. Accordingly, the power generated by the power generator 26 may be stored and/or provided directly to other elements, such as the rotation detection sensor 25, the rear derailleur RD, and the like.

Preferably, as shown in FIG. 4, the electronic circuit board ECB further includes a data storage device 48 provided on the electronic circuit board ECB. The data storage device 48 stores various control programs and information for various control processes, including power generation control, power storage control, hub rotation detection control, and the like. Data storage device 48 includes any computer storage device or any non-transitory computer readable medium, with the sole exception of transient propagating signals. For example, data storage device 48 includes non-volatile memory and volatile memory. Non-volatile memory includes, for example, at least one of read only memory (ROM), erasable programmable read only memory (EPROM), electronically erasable read only memory (EEPROM), and flash memory. Volatile memory includes, for example, random access memory (RAM).

Referring back to Figure 3, the sprocket support structure 18 will be briefly discussed. The sprocket support structure 18 basically includes an outer body 50 and an inner body 52 . The outer body 50 and the inner body 52 are tubular members arranged coaxially around the hub axis 12 . The outer body 50 is constructed to support at least one sprocket CS. Here, the outer body 50 has a plurality of axially extending splines 50a provided on the outer peripheral surface thereof for non-rotatably supporting the sprocket CS. The outer body 50 also has a plurality of axially extending ratchet teeth 50b provided on its inner peripheral surface, forming the first part of the one-way clutch. As described below, the inner body 52 is coupled to the hub body 14 for rotation therewith.

The sprocket support structure 18 also includes a plurality of pawls 54 and biasing elements 56 . The plurality of pawls 54 and the biasing element 56 form the second portion of the one-way clutch. The pawl 54 is retained to the inner body 52 by the biasing element 56 such that the pawl 54 is biased into engagement with the ratchet teeth 50b of the sprocket support structure 18 . More specifically, here, the biasing element 56 includes a pair of split rings 56A and 56B, wherein the ends of each split ring 56A and 56B overlap. A biasing element 56 is mounted around the inner body 52 with portions of the pawl 54 disposed between the biasing element 56 and the inner body 52 . The biasing element 56 presses the pawl 54 against the inner body 52 such that the pawl 54 pivots toward engagement with the ratchet teeth 50b of the sprocket support structure 18 . In this way, the outer body 50 is coupled to the inner body 52 to rotate together in the driving rotational direction D1 about the central axis A1. Also, when the outer body 50 is rotated in the non-driven rotational direction D2 , the ratchet teeth 50b of the sprocket support structure 18 push the pawl 54 and pivot the pawl 54 to the retracted position against the inner body 52 . Thus, the outer body 50 is configured to rotate relative to the inner body 52 in the non-driven rotational direction D2 about the central axis A1. In this way, outer body 50, inner body 52, pawl 54 and biasing element 56 form a flywheel commonly used in bicycles. Since the basic operation of a flywheel is relatively common, the flywheel will not be discussed or illustrated in further detail.

Referring now to Figures 5 to 12, the electronic unit EU will now be discussed in more detail. As described above, the electronic unit EU includes the housing 20 , the cover 22 , and various elements (eg, the electronic circuit board ECB and the power storage PS) provided in the housing 20 . The cover body 22 is attached (ie welded) to the casing 20 to close the inner space 23 of the casing 20 . Therefore, the cover body 22 covers the inner space 23 of the case 20 . Preferably, the casing 20 and the cover 22 are preferably made of non-metallic materials such as resin materials.

The housing 20 includes an inner peripheral portion 60 , an outer peripheral portion 62 , an end wall portion 64 and a connecting portion 66 . The end wall portion 64 interconnects the inner peripheral portion 60 and the outer peripheral portion 62 to at least partially define the interior space 23 . The connecting portion 66 interconnects the inner peripheral portion 60 and the outer peripheral portion 62 . The inner perimeter 60 at least partially defines an enclosed area 70 . The outer peripheral portion 62 is spaced radially outward from the inner peripheral portion 60 relative to the central axis A2 of the enclosed area 70 . Here, the closed area 70 is an opening. The central axis A2 coincides with the central axis A1 of the hub shaft 12 . Even if the closed area 70 is not a circular opening, the central axis A2 of the closed area 70 is defined as the central axis. More specifically, in the illustrated embodiment, the inner peripheral portion 60 and the end wall portion 64 define a through opening for receiving the hub axle 12 .

The inner peripheral portion 60 , the outer peripheral portion 62 and the connecting portion 66 have the same height measured from the end wall portion 64 . In other words, the free ends of the inner peripheral portion 60, the outer peripheral portion 62 and the connecting portion 66 are all located at least partially in a single plane perpendicular to the central axis A2. In this manner, the cover body 22 can be attached to each of the inner peripheral portion 60 , the outer peripheral portion 62 , and the connecting portion 66 .

The cover body 22 is a plate having an opening 22a for receiving the hub axle 12 . The cover body 22 also has positioning pins 22b, as shown in FIG. 10 . Alignment pins 22b are received in grooves 74 in housing 20 for aligning cover 22 with housing 20 to aid in the attachment of cover 22 to housing 20 . The cover body 22 is also provided with protruding ribs 22c corresponding to where the cover body 22 is welded to the housing 20 . Ribs 22c provide additional material so that lid 22 does not warp during welding of lid 22 to housing 20 . In addition, the ribs 22c are provided to improve the surface flatness of the welded portion.

The end wall portion 64 of the housing 20 includes a plurality of keying protrusions 72 . As shown in FIG. 2 , the keying protrusions 72 are configured to engage openings in the fixing plate 76 , which is keyed to the grooves 12d of the hub axle 12 . In this way, the electronic unit EU is prevented from rotating relative to the hub axle 12 . The fixing plate 76 has a plate shape.

The electronic circuit board ECB is attached to the housing 20 by a plurality of fasteners 78 . Thus, the housing 20 supports the electronic circuit board ECB, which in turn supports the rotation detection sensor 38 , the electronic controller 42 and the data storage device 48 . The first capacitor 44 and the second capacitor 46 are supported to the end wall portion 64 . For example, the first capacitor 44 and the second capacitor 46 are fixed to the end wall portion 64 by an adhesive.

The electronic circuit board ECB includes at least one arc-shaped edge corresponding to the arc-shaped surface of one of the inner peripheral portion 60 and the outer peripheral portion 62 of the housing 20 . The at least one arc-shaped edge includes at least one of an inner arc-shaped edge 80 and an outer arc-shaped edge 82 , the inner arc-shaped edge 80 corresponds to the inner arc-shaped surface of the inner peripheral portion 60 , and the outer arc-shaped edge 82 corresponds to on the outer arc surface of the outer peripheral portion 62 of the casing 20 .

Referring now to FIGS. 13-17 , a method of forming a bicycle component 10 having a housing 20 and a cover 22 attached to the housing 20 will now be discussed. More specifically, methods of attaching or joining the housing 20 and cover 22 together will now be discussed. Basically, in this method, the cover 22 is welded to the housing 20 . For example, the lid 22 is welded to the housing 20 using a laser beam. In this method, the cover body 22 is joined to the inner peripheral portion 60 of the casing 20 by welding along the inner welding path WP1, and the cover body 22 is joined to the casing by welding along the outer welding path WP2 20 of the outer peripheral portion 62 . Furthermore, preferably, in this method, the cover body 22 is joined to at least a portion of the connecting portion 66 of the housing 20 by welding along the connecting welding path WP3 connecting the inner welding path WP1 and the outer welding path WP2. Here, in the illustrated embodiment, the connection weld path WP3 includes a first connection weld portion WP3a and a second connection weld portion WP3b that connect the inner weld path WP1 and the outer weld path WP2.

As shown in FIG. 13 , the inner weld path WP1 includes a partially circular portion, and the outer weld path WP2 includes a partially circular portion. Here, the part of the inner circular part and the part of the outer circular part are arranged concentrically. Furthermore, in the illustrated embodiment, the inner weld path WP1, the outer weld path WP2, and the connecting weld path WP3 form a continuous weld path WP. Preferably, the continuous welding path is a closed loop.

The method includes covering the cover 22 over the housing 20 . The method further includes by following an inner weld path WP1 corresponding to the inner perimeter 60 of the housing 20 , along an outer weld path WP2 corresponding to the outer perimeter 62 of the housing 20 , and along the connection corresponding to the housing 20 At least one of the portions 66 joins the weld bead formed by the weld path WP3 to weld the cover 22 to the housing 20 . The connecting welding route WP3 connects the inner welding route WP1 and the outer welding route WP2. Preferably, the welding of the cover body 22 to the housing 20 is carried out through a continuous welding path WP, the continuous welding path WP including the at least one connecting welding path WP3, the inner welding path WP1 and the outer welding path WP2 . Here, as described above, the at least one connection welding path WP3 includes the first connection welding portion WP3a and the second connection welding portion WP3b that connect the inner welding path WP1 and the outer welding path WP2.

In one embodiment, the laser beam does not melt the cover 22 , but penetrates the cover 22 and melts the housing 20 . In another embodiment, the laser beam does not melt the casing 20 , but melts the protruding ribs 22 c of the cover body 22 . In another embodiment, the laser beam melts both the housing 20 and the cover 22 . In any case, the casing 20 and the cover 22 are joined by welding. Therefore, the laser beam of the laser 90 is controlled by the laser welding controller 92 so that the laser beam is focused on the area where the lid body 22 is welded to the edge of the casing 22 . Preferably, the laser 90 is controlled such that the continuous welding path WP is a closed loop. Figures 13 to 17 show various continuous welding paths WP, where the starting point SP and the ending point EP result in a closed loop. The weld bead produced by the laser 90 has a predetermined width so that the starting point SP and the ending point EP of the welding need not be the same point. In FIG. 14, the start point SP and the end point EP are the same point. In FIGS. 15 , 16 and 17 , the start point SP and the end point EP are different points. The start point SP and the end point EP may be placed on the adjacent continuous welding path WP. As a result, the airtightness of the inner space 23 and the strength of the electronic unit EU are improved. During the laser welding process, the laser 90 is not turned off. In other words, the laser beam of the laser 90 remains "on" and is focused on the area between the cover 22 and the housing 22 with sufficient power to form a weld bead between the cover 22 and the housing 22 . For example, the heights of the inner peripheral portion 60, the outer peripheral portion 62, and the connecting portion 66 may be partially varied. At least a part of the inner peripheral portion 60 , the outer peripheral portion 62 , and the connecting portion 66 can be prevented from coming into contact with the cover body 22 . As a result, areas where the lid and housing are not welded can be formed without closing the laser 90, if desired.

In understanding the scope of the present invention, the term "comprising" and its derivatives as used herein are open-ended terms specifying the presence of stated features, elements, components, groups, integers and/or steps, but not excluding the presence of others Features, elements, components, groups, integers and/or steps are not recited. The foregoing also applies to words of similar meaning, such as the terms "comprising", "having" and derivatives thereof. Also, unless stated otherwise, the terms "part," "section," "section," "member" or "element" when used in the singular can have the dual meaning of a single part or the plural.

As used herein, the following directional terms "frame facing side", "non-frame facing side", "forward", "rearward", "front", "rear", "upper", "lower", "upper" , "below", "up", "down", "top", "bottom", "side", "upright", "horizontal", "vertical", and "horizontal" and any other similar directional terms Refers to these orientations of a bicycle in an upright riding position and equipped with bicycle components. Accordingly, these directional terms used to describe bicycle components should be interpreted relative to a bicycle equipped with bicycle components in an upright riding position on a horizontal surface. The terms "left" and "right" are used to refer to the "right" side when referring to the right side when viewed from the rear of the bicycle and to refer to the "left" side when referring to the left side when viewed from the rear of the bicycle.

As used in this disclosure, the phrase "at least one" means "one or more" of the desired options. For example, if the number of options is two, the phrase "at least one or at least one" as used in this disclosure means "there is only one single option" or "both options." As another example, if the number of options is equal to or greater than three, the phrase "at least one or at least one" as used in this disclosure means "there is only one single option" or "any combination of equal to or greater than two options" ". Furthermore, the term "and/or" as used in this disclosure means "one or both."

Also, it should be understood that although the terms "first" and "second" may be used herein to describe various components, these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, for example, a first component discussed above could be termed a second component, and vice versa, without departing from the teachings of the present invention.

The terms "attached" or "attached" as used herein encompass configurations in which an element is directly secured to another element by attaching the element directly to the other element, by attaching the element to a A configuration in which one or more intermediate members are attached to the other element and the element is indirectly fixed to the other element, and an element is integral with another element, that is, an element Essentially a configuration of part of another component. This definition also applies to words of similar meaning, such as the terms "bonded," "connected," "coupled," "mounted," "bonded," "secured," and derivatives thereof. Finally, terms of degree such as "substantially or substantially", "approximately or approximately", and "approximately or approximately" as used herein mean that the term they modify has an amount of deviation such that the end result is not substantially changed.

While only selected embodiments have been chosen to illustrate the invention, it will be apparent to those skilled in the art from this disclosure that, without departing from the scope of the invention as defined in the appended claims. Various changes and corrections are implemented. For example, unless expressly stated otherwise, the size, shape, location, or orientation of the various components may be changed as needed and/or desired so long as such changes do not materially affect their intended function . Unless explicitly stated otherwise, components shown as being directly connected or in contact with each other may have intervening structures disposed therebetween, so long as such changes do not materially affect their intended function. The functions of one element may be performed by two elements, and vice versa, unless explicitly stated otherwise. The structures and actions or functions of one embodiment may be adopted in another embodiment. It is not necessary for all advantages to be present in a particular embodiment at the same time. Each unique feature that differs from the prior art, whether alone or in combination with other features, should also be considered a separate recitation of further inventions by the applicant, including the structural and/or functional concepts embodied by such feature. Accordingly, the above description of embodiments in accordance with the present invention is provided for illustration only, and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

10: Bicycle Parts 12: Hub axle 12d: Groove 14: hub body 16: Wheel holding mechanism 18: Sprocket support structure 20: Shell 22: Cover 23: Interior Space 24: Detected parts 25: Rotation detection sensor 26: Power Generator 28: Armature 30: Magnets 32: Tubular Support 42: Electronic controller 44: First capacitor 46: Second capacitor 48: Data storage device 50: Exosomes 52: Endosome 54: Pawl 56: Bias element 60: Inner circumference 62: Peripheral 64: end wall 66: Connection part 70: closed area 72: Bonding protrusions 74: Groove 76: Fixed plate 78: Fasteners 80: Inner curved edge 82: Outer Arc Edge 90: Laser 92: Laser welding controller 12a: Subject 12b: End piece 12c: Rotation limiting member 14a: First outer flange 14b: Second outer flange 16a: String Rod 16b: Cam body 16c: Cam lever 16d: Adjusting nut 22a: Opening 22b: Dowel pin 22c: Ribs 28A: First Yoke 28B: Second Yoke 28C: Coil 30A: The first magnetic part 30B: Second Magnetic Part 50a: Bolt groove 50b: Ratchet 56A: Split Ring 56B: split ring A1: Center axis A2: Center axis ASP: Height Adjustable Seatpost BP: Main battery pack C: crank CA1: Crankshaft CA2: Crank Arm EN:chain CS: Rear sprocket D1: Drive rotation direction D2: Non-driven rotation direction DT: Drivetrain DU: Electric Drive Unit EC1: First cable EC2: Second cable ECB: Electronic Circuit Board EP: End Point EU: electronic unit FB: Front Frame Body FF: front fork FS: Front sprocket FW: front wheel H: handlebar PD: pedal PS: Power Storage RB: rear frame body RD: rear derailleur RS: Rear shock absorber RW: rear wheel S: Saddle SC: Bicycle computer SL: Transmission SP: starting point V: bicycle VB: Body WP: Continuous Weld Path WP1: Inner Weld Path WP2: Outer Weld Path WP3: Connect Weld Paths WP3a: First connection welding part WP3b: Second connection welding part

Reference is now made to the accompanying drawings which form a part of this original disclosure:

[ FIG. 1 ] is a side view of a bicycle (ie, a human-powered vehicle) equipped with a bicycle component in the form of a hub according to the first embodiment;

[ FIG. 2 ] is a longitudinal view of a wheel hub attached to the body of the human-powered vehicle shown in FIG. 1 ;

[Fig. 3] is a longitudinal sectional view of the hub shown in Fig. 2;

[ FIG. 4 ] is a perspective view of the hub shown in FIGS. 2 to 4 , partially cut away to show an electronic unit with a rotation detection sensor and a magnet provided to the sprocket support structure to detect the sprocket support structure rotation;

[Fig. 5] is a first side perspective view of the electronic unit of the hub shown in Figs. 2 to 4;

[Fig. 6] is a first side perspective view of the electronic unit shown in Fig. 5 of the hub shown in Figs. 2 to 4;

[Fig. 7] is a partially exploded perspective view of the electronic unit shown in Figs. 5 and 6;

[Fig. 8] is a partially exploded perspective view of the electronic unit shown in Figs. 5 to 7;

[Fig. 9] is an exploded perspective view of the housing and the cover of the electronic unit shown in Figs. 5 to 8;

[Fig. 10] is another exploded perspective view of the housing and the cover of the electronic unit shown in Figs. 5 to 9;

[Fig. 11] is a front view of the housing of the electronic unit shown in Figs. 5 to 10, showing the inner space;

[Fig. 12] is a front view of the cover of the electronic unit shown in Figs. 5 to 10, showing the inner side surface;

[ FIG. 13 ] is a schematic perspective view of a cover body welded to the casing;

[ FIG. 14 ] is a side view of the electronic unit, schematically showing a first alternative welding path for welding the cover to the housing;

[ FIG. 15 ] is a side view of the electronic unit, schematically showing a second alternative welding path for welding the cover to the housing;

[FIG. 16] is a side view of the electronic unit schematically showing a third alternative welding path for welding the cover to the housing; and

[ FIG. 17 ] is a side view of the electronic unit in which a fourth alternative welding path for welding the cover to the case is schematically shown.

20: Shell

22: Cover

90: Laser

92: Laser welding controller

EP: End Point

EU: electronic unit

SP: starting point

WP: Continuous Weld Path

WP1: Inner Weld Path

WP2: Outer Weld Path

WP3: Connect Weld Paths

WP3a: First connection welding part

WP3b: Second connection welding part

Claims (27)

A bicycle component comprising: a housing including an inner perimeter portion, an outer perimeter portion, an end wall portion, and a connecting portion, the inner perimeter portion at least partially defining an enclosed area, the outer perimeter portion spaced radially outwardly from the inner perimeter portion relative to a central axis of the enclosed area opening, the end wall portion interconnects the inner peripheral portion and the outer peripheral portion to at least partially define an interior space, the connecting portion interconnects the inner peripheral portion and the outer peripheral portion; and a cover covering the inner space of the casing, the cover is joined to the inner periphery of the casing by welding along an inner welding path, and the cover is welded along an outer welding path To be attached to the outer peripheral portion of the housing, the cover is coupled to at least a portion of the connection portion of the housing by welding along a connection welding path that connects the inner welding path and the outer welding path. The bicycle component of claim 1, wherein the inner weld path includes a partially circular portion and the outer weld path includes a partially circular portion. The bicycle component of claim 2, wherein the partial inner circular portion and the partial outer circular portion are arranged concentrically. The bicycle component of claim 1, wherein the connecting welding path includes a first connecting welding portion and a second connecting welding portion connecting the inner welding path and the outer welding path. The bicycle component of claim 1, wherein the inner weld path, the outer weld path, and the connecting weld path form a continuous weld path. The bicycle component of claim 5, wherein the continuous welding path is a closed loop. The bicycle component of claim 1, further comprising: An electronic circuit board is provided in the inner space of the casing. The bicycle component of claim 7, further comprising: A power storage is provided in the interior space of the housing at a location outside the electronic circuit board. The bicycle component of claim 1, wherein the closed area is an opening. The bicycle component of claim 1, further comprising: the hub axle, supporting the housing, a hub body rotatably disposed about the central axis, and An electric power generator is disposed in the hub body and is configured to generate electric power by the rotation of the hub body. The bicycle component of claim 10, wherein the shell system is non-rotating relative to the hub axle. The bicycle component of claim 10, further comprising: A sprocket support structure is rotatably provided about the central axis to transmit a driving force to the hub body when rotated about the central axis in a driving rotational direction. The bicycle component of claim 10, further comprising: a component to be inspected, provided to the sprocket support structure; and A rotation detection sensor is provided in the inner space of the housing, the rotation detection sensor is configured to detect the detected part to detect the rotation of the sprocket support structure about the central axis. A bicycle component comprising: a housing including an inner perimeter, an outer perimeter, and an end wall, the inner perimeter at least partially defining an enclosed area, the outer perimeter spaced radially outwardly from the inner perimeter relative to a central axis of the enclosed area, the An end wall portion interconnects the inner peripheral portion and the outer peripheral portion to at least partially define an interior space; and An electronic circuit board, provided in the inner space of the casing, the electronic circuit board comprising at least one arc-shaped edge corresponding to the arc-shaped surface of one of the inner peripheral portion and the outer peripheral portion of the casing, the electronic circuit board The circuit board includes at least one electronic component; and A power storage is provided outside the electronic circuit board in the interior space of the housing and is electrically connected to the at least one electronic component. The bicycle component of claim 14, wherein the at least one arcuate edge includes at least one of an inner arcuate edge and an outer arcuate edge, the inner arcuate edge corresponding to an inner arcuate surface of the inner peripheral portion, The outer arcuate edge corresponds to the outer arcuate surface of the outer peripheral portion of the housing. The bicycle component of claim 14, further comprising: A cover covers the inner space of the casing and is coupled to the casing. The bicycle component of claim 14, wherein the power storage includes at least one capacitor. The bicycle component of claim 14, wherein the closed area is an opening. The bicycle component of claim 14, further comprising: the hub axle, supporting the housing, a hub body rotatably disposed about the central axis, and An electric power generator is disposed in the hub body and configured to generate electric power by the rotation of the hub body. The bicycle component of claim 19, wherein the shell system is non-rotating relative to the hub axle. The bicycle component of claim 19, further comprising: A sprocket support structure is rotatably provided about the central axis to transmit a driving force to the hub body when rotated about the central axis in a driving rotational direction. The bicycle component of claim 19, wherein the at least one electronic component includes a rotation detection sensor configured to detect the detected component to detect rotation of the sprocket support structure about the central axis . A method of forming a bicycle component having a housing and a cover attached to the housing, the method comprising: covering the cover on the casing; and By at least one connecting welding path along an inner welding path corresponding to the inner circumference of the casing, along an outer welding path corresponding to the outer circumference of the casing, and along a connecting portion corresponding to the casing The formed weld bead welds the cover body to the casing, and the connection welding path connects the inner welding path and the outer welding path. The method of claim 23, wherein welding the cover to the housing is performed using a laser beam. 23. The method of claim 23, wherein welding the cover to the housing is performed by a continuous welding path, the continuous welding path including the at least one connecting welding path, the inner welding path, and the outer welding path . The method of claim 25, wherein the continuous welding path is a closed loop. The method of claim 25, wherein the at least one connection welding path includes a first connection welding portion and a second connection welding portion connecting the inner welding path and the outer welding path.

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