JP2016097825A - Radio equipment and hub dynamo - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radio equipment having electronic components received in a hub dynamo, and suppressed in failure.SOLUTION: Radio equipment comprises a circuit board 48 on which electronic components 54 are mounted, and the circuit board 48 is installed on a hub shaft 2 of a hub dynamo 1 that is used in a bicycle. The hub shaft 2 is not rotated even when the bicycle travels. Therefore, the circuit board 48 is prevented from rotating when the bicycle travels, and a communicator hardly fails.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radio having a board built in a hub dynamo and a hub dynamo having the board built therein.

  There is known a technology in which a communication device is mounted on a bicycle equipped with a hub dynamo and the communication device is operated with electric power generated by the hub dynamo (for example, Patent Document 1).

JP 2013-106129 A

  Of the communication devices, it is conceivable that a board on which electronic components are mounted is built in a hub dynamo. Since it is difficult to open the hub dynamo, if the board is built in the hub dynamo, the risk of the communication device being stolen is reduced. However, since the hub dynamo has a rotating part, there is a concern about the failure of the board built in the hub dynamo.

  The present invention has been made based on this situation, and an object of the present invention is to provide a radio in which electronic components are housed in a hub dynamo and failure is suppressed.

  The above object is achieved by a combination of the features described in the independent claims, and the subclaims define further advantageous embodiments of the invention. Reference numerals in parentheses described in the claims indicate a correspondence relationship with specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present invention. .

  An invention relating to a radio for achieving the above object includes a board (48) on which an electronic component (54) constituting a communication circuit is mounted, and the board is a hub shaft in a hub dynamo (1) used for a bicycle. (2) Or it is attached to the component (28) which does not rotate relatively with respect to a hub axis | shaft among the components in a hub dynamo.

  Further, an invention relating to a hub dynamo for achieving the above object is characterized by comprising the substrate of the invention relating to a radio.

  According to these inventions, the hub shaft or the component that does not rotate relative to the hub shaft does not rotate even when the bicycle travels. As a result, the substrate is prevented from rotating when the bicycle travels, and the communication device is less likely to fail.

1 is a cross-sectional view of a hub dynamo 1. FIG. It is a figure which shows the surface by which the electronic component 54 of the board | substrate 48 is mounted. It is a figure which shows the board | substrate 148 of the modification 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a hub dynamo 1 to which the present invention is applied, cut along a plane passing through the axis of a hub shaft 2.

  The hub dynamo 1 includes a wheel case 3. The wheel case 3 includes a case main body 10 and a case lid 16.

  In the case main body 10, annular flange portions 12 and 13 having an outer diameter larger than that of the cylindrical portion 11 are formed at both ends of the cylindrical portion 11. One end of a spoke (not shown) is fixed to the peripheral portions of the flange portions 12 and 13.

  One flange portion 12 has an inner diameter smaller than the inner diameter of the cylindrical portion 11, and a bearing 20 is fitted on the inner periphery thereof. The other flange portion 13 has the same inner diameter as the inner diameter of the end of the cylindrical portion 11 on the flange portion 13 side.

  The flange parts 12 and 13 are annular as described above. That is, both ends in the axial direction of the case body 10 having both ends of the flanges 12 and 13 are open. A case lid 16 serving as one side wall of the wheel case 3 is fitted into one opening, that is, the inner peripheral side of the flange portion 13. A bearing 24 is fitted into the inner periphery of the case lid 16.

  The two bearings 20 and 24 are attached to the hub axle 2, and the wheel case 3 is attached to the hub axle 2 via the two bearings 20 and 24. 3 rotates relative to the hub shaft 2.

  The cylindrical portion 11 has an inner peripheral diameter at the end on the flange portion 13 side that is larger than the inner peripheral diameter of other portions. Thereby, the contact surface 14 which contacts the side surface of the case lid 16 is formed at the end portion on the flange portion 13 side.

  Both ends of the hub shaft 2 protrude from the wheel case 3, and the protruding portions are fixed to a fork (not shown). The hub shaft 2 has a thread groove formed on the entire outer peripheral surface. However, an axial groove 26 is partially formed along the axial direction in a portion where the wheel case 3 is attached.

  One end of the axial groove 26 is near the center in the axial direction of the wheel case 3, and the other end is located outside the wheel case 3. The length in the width direction of the axial groove 26 is one third or less of the circumferential length of the hub shaft 2, and the range in which the axial groove 26 is formed in the longitudinal direction of the hub shaft 2 is also the axial groove. Except for the portion where 26 is formed, a thread groove is formed.

  The stator 28 includes a coil wound in a cylindrical shape, and the hub shaft 2 is fitted on the inner peripheral side of the coil. Nuts 30 and 32 are fitted to the hub shaft 2 on both sides in the axial direction of the stator 28, and the stator 28 is clamped from both sides in the axial direction by the nuts 30 and 32, so that the hub shaft 2 is pressed against the hub shaft 2. Thus, relative rotation is impossible and movement in the axial direction is impossible.

  In addition, the stator 28 is fixed to the hub shaft 2 at a position where the axial groove 26 is formed, and the conductive wire 34 extending from the stator 28 passes through the axial groove 26 to the outside of the wheel case 3. It extends. In order to shorten the distance for leading the conductive wire 34 to the outside of the wheel case 3, the stator 28 is disposed near the case lid 16 in the cylindrical portion 11. Therefore, the space between the stator 28 and the case lid 16 is smaller than the space between the stator 28 and the flange portion 12.

  The leading end of the conducting wire 34 extending from the stator 28 is connected to the base end of the light side terminal 36. A light side cord 38 is connected to the tip of the light side terminal 36, and a light 40, which is an electrical device, is connected to the other end of the light side cord 38.

  The light-side terminal 36 is fixed to the hub shaft 2 via a resin ring 44 fitted to the hub shaft 2 in a state of being accommodated in a protective case 42 made of an insulator. The protective case 42 also accommodates the frame side terminal 45 while being insulated from the light side terminal 36. The hub shaft 2 is fitted into the base end of the frame side terminal 45, and the frame side terminal 45 is electrically connected to the hub shaft 2 functioning as a ground. One end of a frame side cord 46 is connected to the tip of the frame side terminal 45. The other end of the frame side cord 46 is connected to the light 40. The light side cord 38 and the frame side cord 46 are arranged between the hub dynamo 1 and the light 40 so as to go around the outer surface of a fork (not shown).

  A nut 47 fitted to the hub shaft 2 is in contact with the side surface of the protective case 42 opposite to the case lid 16 side. The nut 47 presses the protective case 42 toward the case lid 16.

  In the hub axle 2, a substrate 48 is fixed between the case lid 16 and the stator 28. The substrate 48 has a through hole 48a at the center, and the hub shaft 2 is inserted through the through hole 48a. Then, nuts 50 and 52 fitted to the hub shaft 2 are in contact with both side surfaces of the substrate 48, respectively. The nuts 50 and 52 correspond to fastening members, and the board 48 is clamped by the nuts 50 and 52 in a state where the hub shaft 2 is inserted into the through hole 48a, so that the base plate 48 is relative to the hub shaft 2. It cannot rotate and cannot move in the axial direction of the hub shaft 2.

  Further, both sides of the substrate 48 are perpendicular to the hub axle 2, and electronic parts 54 for communication are fixed to one side. A conductive wire 56 extending from the stator 28 is connected to the substrate 48.

  A washer 58 and a nut 60 are fitted into the hub shaft 2 on a side surface of the flange portion 12 on the outer side of the wheel case 3, and the nut 60 presses the flange portion 12 toward the cylindrical portion 11 via the washer 58. To do.

  The permanent magnet 62 is fixed at a position facing the stator 28 on the inner surface of the cylindrical portion 11 of the case body 10. When the wheel case 3 rotates relative to the hub shaft 2, the permanent magnet 62 fixed to the wheel case 3 rotates relative to the stator 28, so that power generation is performed. The generated electric power is supplied to the electronic component 54 disposed on the substrate 48 through the conductive wire 56, and is supplied to the light 40 through the conductive wire 34, the light side terminal 36, and the light side cord 38.

  One end of the antenna wiring 64 is fixed to the substrate 48, and the other end is fixed to the light side terminal 36. The light side cord 38 connected to the light side terminal 36 not only supplies power to the light 40 but also functions as an antenna.

  The wireless device is configured by the light side cord 38 that functions as an antenna, the antenna wiring 64 that connects the light side cord 38 and the substrate 48, the light side terminal 36, the substrate 48, and the electronic component 54 mounted on the substrate 48. The frequency used by this radio is, for example, an RF band such as a 300 MHz band, and the radio performs at least one of radio transmission and radio reception of signals.

  This radio operates with electric power generated by the rotation of the permanent magnet 62 with respect to the stator 28. However, a power storage device may be provided as the electronic component 54, the power generated by the rotation of the permanent magnet 62 with respect to the stator 28 may be stored in the power storage device, and the wireless device may be operated with the power stored in the power storage device.

  As shown in FIG. 2, a plurality of electronic components 54 are mounted on the substrate 48, but in the central portion of the substrate 48, that is, around the through hole 48 a, the contact area 48 b where the electronic component 54 is not mounted. Is provided. The nut 50 comes into contact with the contact region 48b.

  Note that the plurality of electronic components 54 shown in FIG. 2 are connected to each other necessary components on the back surface of the substrate 48 not shown in FIG. The antenna wiring 64 is also connected to a predetermined electronic component 54 on the back surface of the substrate 48.

  As described above, the hub dynamo 1 of the present embodiment described above includes the substrate 48 on which the electronic component 54 is mounted, and the substrate 48 is fixed to the hub shaft 2. Since the hub shaft 2 does not rotate when the bicycle travels, fixing the substrate 48 to the hub shaft 2 and suppressing the substrate 48 from rotating when the bicycle travels can prevent the communication device from malfunctioning. It becomes difficult to do.

  In addition, among the light side terminal 36 and the antenna wiring 64 that connect the light side cord 38 that functions as an antenna of this communication device to the substrate 48, the light side terminal 36 is fixed to the hub shaft 2. The light side terminal 36 and the substrate 48 are connected. Therefore, the light side cord 38 that functions as an antenna, the light side terminal 36 that is a member for connecting the light side cord 38 and the board 48, and the antenna wiring 64 do not rotate even when the bicycle travels. Is suppressed.

  In the present embodiment, the surface of the substrate 48 on the side where the electronic component 54 is mounted is also provided with a contact area 48b where the electronic component 54 is not mounted. By providing the contact region 48b as described above, the substrate 48 can be clamped from both sides by the nuts 50 and 52 and fixed to the hub shaft 2.

  In the present embodiment, the substrate 48 includes a through hole 48a, and the substrate 48 is attached to the hub shaft 2 by the hub shaft 2 passing through the through hole 48a. Because of such a shape, the substrate 48 exists in the entire circumferential direction of the hub shaft 2. Therefore, even if the contact region 48 b is provided, the board 48 can increase the area for mounting the electronic component 54.

  Further, in the present embodiment, the substrate 48 is disposed between the stator 28 and the case lid 16 that is the side wall of the wheel case 3 on the light side terminal 36 side. In the hub shaft 2, an axial groove 26 is formed between the stator 28 and the case lid 16 to guide the lead wire 34 extending from the stator 28 to the outside of the wheel case 3. Therefore, the antenna wiring 64 that connects the light side cord 38 that is arranged outside the wheel case 3 and functions as an antenna and the substrate 48 can be passed through the axial groove 26. Therefore, it is not necessary to separately form a passage for passing the antenna wiring 64 in the hub shaft 2.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, The following modification is also contained in the technical scope of this invention, Furthermore, the summary other than the following is also included. Various modifications can be made without departing from the scope.

<Modifications 1 and 2>
In the above-described embodiment, the substrate 48 is fixed to the hub axle 2, but is not limited thereto. The substrate 48 may be fixed to the surface on the case lid 16 side of the stator 28 that is a component that does not rotate relative to the hub shaft 2 (Modification 1), or the surface on the flange portion 12 side of the stator 28. (Modification 2).

<Modification 3>
Although the substrate 48 in the above-described embodiment has an annular shape, the shape of the substrate does not necessarily have to be an annular shape. For example, a substantially U-shaped substrate 148 shown in FIG. 3 may be used. The substrate 148 has a fitting recess 148a. The fitting recess 148a is fitted with the hub axle 2, and includes a semicircular arc portion 148a1 and a pair of parallel linear portions 148a2 extending from both ends of the arc portion 148a1.

  The substrate 148 is clamped by nuts 50 and 52 from both sides in the axial direction in the state where the hub shaft 2 is fitted to the arc portion 148a1 of the fitting recess 148a in the same manner as the substrate 48 of the above-described embodiment. , Attached to the hub axle 2.

  The board 148 includes a contact area 148b where the electronic component 54 is not disposed, as in the case of the board 48 of the above-described embodiment, and the nut 50 contacts the contact area 148b.

  When the fitting recess 148a is fitted to the hub shaft 2 as in the third modification, it is not necessary to insert the hub shaft 2 through the substrate 148. Therefore, it can be attached to the hub shaft 2 more easily than the substrate 48 of the above-described embodiment.

<Modification 4>
In the above-described embodiment, the light side cord 38 is used as an antenna. However, instead of using the light side cord 38 as an antenna, a separate antenna may be provided, and this antenna may be connected to the antenna wiring 64.

1: Hub dynamo, 2: Hub axle, 3: Wheel case, 10: Case body, 11: Cylindrical part, 12: Flange, 13: Flange, 14: Abutment surface, 16: Case lid, 20: Bearing 24: bearing, 26: axial groove, 28: stator, 30: nut, 32: nut, 34: conductor, 36: light side terminal, 38: light side cord, 40: light, 42: protective case, 44 : Resin ring, 45: Frame side terminal, 46: Frame side cord, 47: Nut, 48: Board, 48a: Through hole, 48b: Abutting area, 50: Nut, 52: Nut, 54: Electronic component, 56: Conductor, 58: Washer, 60: Nut, 62: Permanent magnet, 64: Antenna wiring, 148: Substrate, 148a: Fitting recess, 148a1 Arc portion, 148a2: straight section, 148b: contact area

Claims (7)

A board (48, 148) on which electronic components (54) constituting a communication circuit are mounted;
The board is attached to a hub shaft (2) in a hub dynamo (1) used for a bicycle or a component (28) that does not rotate relative to the hub shaft among components in the hub dynamo. A radio characterized by. In claim 1,
The substrate (48) includes a through hole (48a),
The wireless device, wherein the substrate is attached to the hub shaft by passing the hub shaft through the through hole. In claim 1,
The substrate (148) includes a fitting recess (148a) that fits with the hub axle,
The substrate is attached to the hub shaft by being clamped by a fastening member fitted to the hub shaft in a state where the hub shaft is fitted to the fitting recess. A featured radio. In claim 2,
The substrate is
With the hub shaft penetrating through the through hole, the clamping member (50, 52) fitted to the hub shaft is clamped from the axial direction of the hub shaft,
A wireless device comprising a contact area (48b) in which no parts are mounted in order to contact the fastening member around the through hole. In claim 3,
The substrate is
With the hub shaft fitted in the fitting recess, the clamping member (50, 52) fitted to the hub shaft is clamped from the axial direction of the hub shaft,
A wireless device comprising a contact area (148b) in which no component is mounted in order to contact the fastening member around the fitting recess. In any one of Claims 1-5,
The hub dynamo is
A stator (28) fixed to the hub axle;
A cylindrical wheel case (3) that houses the stator and rotates together with the wheel to which the hub dynamo is attached;
A permanent magnet (62) fixed to the inner surface of the wheel case and rotating relative to the stator by rotation of the wheel case;
A terminal (36) to which a cord that is fixed to the hub shaft outside the wheel case and extends from an electric device that operates with the electric power generated by the hub dynamo is connected;
In order to guide the lead wire (34) extending from the stator to the terminal, it is formed in the axial direction of the hub axle from at least the terminal side end of the stator to the outside of the wheel case in the direction of the terminal. An axial groove (26);
An antenna (38) disposed outside the hub dynamo,
The substrate is disposed between the stator and the side wall on the terminal side of the wheel case,
The wireless device further comprising antenna wiring (64) for connecting the antenna and the substrate through the axial groove. A hub dynamo having substrates (48, 148) on which electronic components (54) are mounted,
The hub dynamo is characterized in that the substrate is attached to a hub shaft (2) in the hub dynamo or a component (28) that does not rotate relative to the hub shaft among the components in the hub dynamo. .

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