JP2013122855A - Displacement detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a size of a displacement detector.SOLUTION: A displacement detector 1 comprises: a magnet for generating a magnetic flux; a magnetic shielding plate 5 for changing the magnetic flux of the magnet in accordance with rotation of a side stand; a magnetic sensor for detecting the change in the magnetic flux of the magnet; a detection circuit for detecting displacement by the rotation of the side stand on the basis of an output value of the magnetic sensor, changing in accordance with the magnetic flux of the magnet; and a substrate 9, having a laterally long shape, where the magnetic sensor and the detection circuit are mounted. In such a configuration, the substrate 9 has a first end 9a having a narrower width Wa and a second end 9b having a wider width Wb in a longitudinal direction, a plate surface arranged in parallel to a rotation surface R of the side stand, and a first longitudinal side edge 9e which is directed to a rotation center Q of the side stand. The first end 9a of the substrate 9 is disposed in the vicinity of the rotation center Q of the side stand, and the second end 9b of the substrate 9 is disposed away from the rotation center Q of the side stand.

Description

  The present invention relates to a structure of a displacement detection device that detects displacement due to rotation of an object.

  As a displacement detection device that detects displacement due to rotation of an object using a magnetic means, for example, there are devices disclosed in Patent Documents 1 to 6.

  In Patent Literature 1 to Patent Literature 4, a magnetic sensor and a detection circuit are mounted on a substrate, and a magnet is connected to a magnetic sensor by rotating means (rotor, moving member, holder, shaft) interlocked with an object (side stand or operation grip). The magnetic flux generated by the magnet is changed. And the change of the magnetic flux of a magnet is detected with a magnetic sensor, and a detection circuit detects the displacement by rotation of a subject based on the output voltage of the magnetic sensor according to the change of the magnetic flux.

  In Patent Document 5 and Patent Document 6, a coil and a detection circuit are mounted on a substrate, and a detection object made of a conductive material is provided on a rotating means (rotor) that is linked to an object (side stand). Then, by rotating the object to be detected with respect to the coil, the magnetic flux generated by the coil and the impedance of the coil are changed, and the detection circuit detects the displacement due to the rotation of the object based on the impedance.

  As disclosed in Patent Documents 1 to 5, a substrate on which a magnetic sensor and a detection circuit are mounted is generally formed in a horizontally long rectangular shape. In Patent Document 1 and Patent Documents 3 to 5, the substrate is arranged radially from the rotation center with the short side edge of the substrate facing the rotation center of the object. In Patent Document 2, the substrate is arranged in a separated state on the side of the rotating means with the longitudinal side edge of the substrate facing the rotation center of the object and the rotating means (moving member). In Patent Document 6, an annular substrate is arranged around an object.

  However, when a horizontally long and rectangular substrate is arranged as described above, the amount of protrusion of the substrate from the center of rotation of the object increases, and the apparatus becomes large.

JP 2008-130314 A JP 2009-98005 A JP 2009-294212 A JP 2010-123334 A JP 2010-228565 A JP 2010-228666 A

  The subject of this invention is aiming at size reduction of a displacement detection apparatus.

  The present invention includes a magnetic flux generating means for generating a magnetic flux, a magnetic flux changing means for changing the magnetic flux according to the rotation of the object, a detecting means for detecting a displacement due to the rotation of the object based on the change of the magnetic flux, In a displacement detection device comprising a horizontally long substrate mounted with a detecting means, the width of one end in the longitudinal direction of the substrate is narrowed, the width of the other end is widened, and the substrate surface of the substrate is rotated. One end of the substrate is arranged near the center of rotation of the object, with one longitudinal side edge of the substrate facing the center of rotation of the object, parallel to the surface, and the substrate at a position away from the center of rotation of the object The other end of the is disposed.

  According to the above, the board surface of the horizontally long substrate is parallel to the rotation surface of the object, the one long side edge of the substrate is directed to the rotation center of the object, and the narrow end of the substrate is placed on the object. It can arrange | position in the vicinity state of the rotation center vicinity. For this reason, it is possible to reduce the amount of protrusion of the substrate from the center of rotation of the object, and to reduce the size of the displacement detection device in the direction parallel to the rotation direction and the axial direction of the rotation axis of the object. Become.

  According to the present invention, in the displacement detection device described above, the short side edge on one end side of the substrate may protrude from the rotation center of the object to the opposite side to the other end portion with respect to the longitudinal direction of the substrate. Good.

  According to the present invention, in the above displacement detection device, the magnetic flux generating means is made of a magnet, the magnetic flux changing means is made of a magnetic material, and the detecting means is a magnetic sensor that detects a change in magnetic flux of the magnet, and an output of the magnetic sensor. You may make it consist of the detection circuit which detects the displacement of a target object based on a value.

  According to the present invention, in the displacement detection device described above, a magnetic sensor is mounted on one end of the substrate, a magnet is disposed above the magnetic sensor, and the magnetic body is moved in and out between the magnetic sensor and the magnet. Also good.

  Furthermore, in the present invention, in the displacement detection device described above, an external communication wire may be connected to the other end of the substrate.

  According to the present invention, it is possible to reduce the amount of protrusion of the substrate from the center of rotation of the object and to reduce the size of the displacement detection device.

It is the figure which showed the example of application of the displacement detection apparatus by one Embodiment of this invention. It is the figure which showed the example of application. It is a disassembled perspective view of the displacement detection apparatus of FIG. 1A. It is the figure which looked at the displacement detection apparatus of FIG. 1A from the front side. It is the figure which showed the arrangement | positioning state of the board | substrate of the displacement detection apparatus of FIG. 1A. It is the perspective view which showed the inside of the displacement detection apparatus of FIG. 1A. It is an enlarged view of the XX cross section of FIG. It is the enlarged view. It is an enlarged view of the YY cross section of FIG. It is an enlarged view of the ZZ cross section of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  First, an application example of the displacement detection device 1 according to an embodiment of the present invention will be described.

  As shown in FIGS. 1A and 1B, the displacement detection device 1 is attached to a vehicle body A of a motorcycle, for example, via a bracket K, a bolt, a nut (not shown), and the like. The displacement detection device 1 is used, for example, to detect displacement due to rotation of the side stand S. The side stand S is an example of the “object” in the present invention.

  As shown in FIG. 1A, a concave engagement portion Sb for engaging the bracket K is formed at the upper end portion of the side stand S. As shown in FIGS. 6A and 6B, the rotation shaft J passes through the through hole Sa formed in the upper end portion of the side stand S and the through hole Ka formed in the bracket K. The side stand S and the rotating shaft J are fixed. The head portion Ja of the rotation shaft J is engaged with the inside of the displacement detection device 1.

  The bolt B passes through the through hole 20 provided in the displacement detection device 1 and is screwed to one end of the rotating shaft J. The nut N is screwed to the other end of the rotating shaft J. The side stand S and the displacement detection device 1 are attached to the bracket K by a rotating shaft J, a bolt B, and a nut N.

  The side stand S rotates with respect to the vehicle body A and the bracket K around the rotation axis J. When the side surface of the side stand S and the side surface of the bracket K abut, the rotation range of the side stand S is limited between the standing position shown in FIG. 1A and the storage position shown in FIG. 1B. That is, the side stand S rotates to displace between the standing position and the storage position.

  The coil spring C shown in FIG. 1A is hooked on the side stand S and the bracket K. The coil spring C pulls the side stand S and holds it in the standing position or the storage position. The rotation of the side stand S is performed by an operation by a user's foot of the motorcycle.

  Next, the structure of the displacement detection device 1 will be described.

  As shown in FIG. 2, the displacement detection device 1 includes a holder 2, a cover 3, a case 4, a magnetic shielding plate 5, a retaining ring 6, a magnet 7, a magnetic sensor 8, a board 9, a harness 10, a hook 11, and a bush. 14 etc. are provided.

  The cover 3 and the case 4 are assembled as shown in FIGS. 3 and 6A to 8 by fitting the lock 3a of the cover 3 into the square hole 4a of the case 4. An O-ring 16 is sandwiched between the cover 3 and the case 4 as shown in FIGS. 6A, 6B, 7, and 8. In an internal space formed by the cover 3 and the case 4, a magnetic shielding plate 5, a holding ring 6, a magnet 7, a magnetic sensor 8, a substrate 9, and the like are accommodated.

  As shown in FIGS. 2 to 4, a recess 3 b is formed on the side of the cover 3. The recess 3b is open to the side. As shown in FIGS. 1A and 1B, the pin P is fixed to the bracket K through the recess 3b of the cover 3, whereby the rotation of the cover 3 and the case 4 with respect to the bracket K is prevented.

  As shown in FIGS. 2, 6A, and 6B, the lower convex portion 2c of the holder 2 is engaged with the engaging portion 3c inside the cover 3 from above. As shown in FIGS. 1A, 1B, 6A, and 6B, the upper end portion of the side stand S is engaged with the large engagement portion 2a on the upper side of the holder 2. The holder 2 holds the upper end portion of the side stand S. The head Ja of the rotation shaft J is engaged with the small engagement portion 2 b of the holder 2.

  The magnetic shielding plate 5 is made of a ferromagnetic material such as iron. As shown in FIGS. 2 and 4, a small diameter portion 5 a and a large diameter portion 5 b are formed on the outer peripheral edge of the magnetic shielding plate 5. As shown in FIG. 2, a plurality of semicircular arc-shaped engaging portions 5 c are formed on the inner peripheral edge of the magnetic shielding plate 5. A plurality of protrusions 6 a protruding upward are formed on the outer peripheral edge of the holding ring 6. As shown in FIG. 5, the retaining ring 6 holds the magnetic shielding plate 5 by engaging the protrusion 6 a of the retaining ring 6 with the engaging portion 5 c of the magnetic shielding plate 5.

  As shown in FIGS. 6A and 6B, the holding ring 6 is sandwiched between the cover 3 and the case 4 with a predetermined gap from above and below. The magnetic shielding plate 5 is also sandwiched between the cover 3 and the case 4 with a predetermined gap from above and below. O-rings 12 and 13 are sandwiched between the recess of the holding ring 6 and the cover 3 and the case 4.

  At the upper end of the inner peripheral edge of the holding ring 6, a tooth mold portion 6b is formed as shown in FIGS. The tooth mold portion 6b has an irregular uneven shape. In FIG. 6A and FIG. 6B etc., a tooth mold part 2d that meshes with the tooth mold part 6b of the holding ring 6 is formed at the lower end of the inner peripheral edge of the holder 2. The bush 14 is inserted inside the holder 2 and the holding ring 6. The bolt B passes through the inner space of the bush 14. The holder 2, the holding ring 6, and the magnetic shielding plate 5 rotate around the rotation axis J in conjunction with the side stand S.

  The substrate 9 is formed in a horizontally long shape as shown in FIGS. The width Wa (FIG. 4) of one end 9a in the longitudinal direction of the substrate 9 is narrow, and the width Wb (FIG. 4) of the other end 9b is wide. That is, there is a relationship of Wa <Wb. On the substrate 9, the magnetic sensor 8, the detection circuit 15, and one end of the harness 10 are mounted. Specifically, the magnetic sensor 8 is mounted on the upper surface of the one end 9 a of the substrate 9. One end of the harness 10 is mounted on the other end portion 9 b of the substrate 9. The detection circuit 15 is mounted between the magnetic sensor 8 on the substrate 9 and one end of the harness 10. The magnetic sensor 8 is composed of, for example, a Hall IC. The other end of the harness 10 is connected to a control device (not shown) of the motorcycle.

  The magnetic sensor 8 detects a change in magnetic flux generated by the magnet 7. The detection circuit 15 detects the displacement due to the rotation of the side stand S based on the output value (voltage value) of the magnetic sensor 8. The magnet 7 is an example of the “magnetic flux generating means” in the present invention. The magnetic sensor 8 and the detection circuit 15 are an example of the “detection means” in the present invention.

  As shown in FIGS. 7 and 8 and the like, the case 4 is formed with a substrate storage portion 4b composed of a horizontally long space. As shown in FIGS. 2 and 5, the substrate storage portion 4 b protrudes to the side of the case 4. The most projecting side end portion of the case 4 is the inlet 4d of the substrate storage portion 4b.

  A plurality of grooves 4e, 4f, 4g, 4h, and 4i are provided on the side wall (three surfaces other than the inlet 4d) of the substrate storage portion 4b as shown in FIGS. 2 and 6A to 8. The heights of the grooves 4e, 4f, 4g, 4h, and 4i from the lower surface of the case 4 (the outer surface opposite to the holder 2) are the same. The widths of the grooves 4e, 4f, 4g, 4h, and 4i are the same and slightly larger than the thickness of the substrate 9.

  With the plate surface of the substrate 9 parallel to the rotation surface R (FIGS. 4, 6A, and 6B) of the side stand S, one long side edge 9e of the substrate 9 faces the rotation center Q of the side stand S. Inserted into the grooves 4e, 4f, 4g, 4h, and 4i from the one end 9a side as shown in FIGS. Thereby, both the long side edges 9e, 9g of the substrate 9 and the short side edge 9i on the one end portion 9a side are held in the grooves 4e, 4f, 4g, 4h, 4i, and the substrate 9 is stored in the substrate storage portion 4b. Is done.

  The short side edge 9d on the other end 9b side of the substrate 9 is pressed to the back groove 4i side by the hook 11, as shown in FIGS. The inlet 4 d of the substrate storage portion 4 b is closed by the hook 11, the protective bush 17 of the harness 10, and the cover 3. As shown in FIGS. 3 and 6, the hook 11 is attached to the case 4. The protective bush 17 is attached to the hook 11.

  FIG. 4 shows the position of the substrate 9 stored in the substrate storage portion 4b, and the case 4 is not shown for convenience. In the housed state, the one end 9 a of the substrate 9 is disposed near the rotation center Q of the side stand S. The other end 9 b of the substrate 9 is arranged at a position away from the rotation center Q of the side stand S. The short side edge 9 i on the one end 9 a side of the substrate 9 protrudes from the rotation center Q of the side stand S to the opposite side to the other end 9 d with respect to the longitudinal direction of the substrate 9.

  As shown in FIGS. 6A, 6B, and 8, in the grooves 4h and 4g into which the long side edge 9g of the substrate 9 enters, the lower corners of the bottom are chamfered. As a result, the substrate 9 moves to the upper side and the opening side of the groove 4h along the chamfered slope 4j of the grooves 4h and 4g, and the upper wall of the grooves 4e, 4f, 4g and 4h, and the opposite side. It is pressed against the bottom of the grooves 4e, 4f.

  As shown in FIGS. 6A to 8, a concave magnet storage portion 4 k is provided above the magnetic sensor 8 of the case 4. The magnet 7 is inserted into the magnet storage portion 4k from above, and is stored in the magnet storage portion 4k as shown in FIGS. Thereby, the magnet 7 is disposed above the magnetic sensor 8.

  As shown in FIG. 5, a lock 4r for preventing the magnet 7 from coming off is provided at the upper end of the magnet housing portion 4k. As shown in FIGS. 6A to 8, a seal portion 16 a provided on the O-ring 16 is sandwiched between the magnet storage portion 4 k and the cover 3. The seal part 16a presses the magnet 7 against the bottom of the magnet storage part 4k.

  A space 4m is provided between the magnetic sensor 8 and the magnet 7 of the case 4 as shown in FIGS. 6A and 6B. The distance from the lower surface of the case 4 to the space 4 m is substantially equal to the distance from the lower surface of the case 4 to the magnetic shielding plate 5. The height of the space 4 m is slightly larger than the thickness of the magnetic shielding plate 5. The space 4m, the magnetic shielding plate 5, the substrate 9, the magnetic sensor 8, and the magnet 7 are parallel to the rotation surface R of the side stand S.

  The magnetic shielding plate 5 moves in and out of the space 4m as shown in FIGS. 6A and 6B by rotating around the rotation axis J in conjunction with the side stand S. The rotating surface of the magnetic shielding plate 5 is parallel to the substrate 9. According to the rotation of the side stand S, the magnetic shielding plate 5 rotates, whereby the magnetic flux of the magnet 7 changes. The magnetic sensor 8 detects a change in the magnetic flux. The magnetic shielding plate 5 is an example of “magnetic flux changing means” and “magnetic material” of the present invention.

  Next, the operation of the displacement detection device 1 will be described.

  As shown in FIG. 1A, when the side stand S is in the standing position, the small-diameter portion 5a of the magnetic shielding plate 5 is located in the vicinity of the magnet 7 and the magnetic sensor 8 as shown in FIG. 6A. That is, the magnetic shielding plate 5 is located outside the space 4 m between the magnet 7 and the magnetic sensor 8 and does not shield the magnetic sensor 8 from the magnetic field generated by the magnet 7.

  At this time, since the output value of the magnetic sensor 8 becomes a low level, the detection circuit 15 (FIG. 2) detects that the shield plate 5 is in the non-shielding position (outside the space 4 m) and the side stand S is displaced to the standing position. Detect that Then, the detection circuit 15 transmits the detection result to the motorcycle control device via the harness 10.

  When the side stand S is rotated from the standing position to the storage position as shown in FIG. 1B, the large-diameter portion 5b of the magnetic shielding plate 5 is a space between the magnet 7 and the magnetic sensor 8 as shown in FIG. 6B. Located within 4m. That is, the magnetic shielding plate 5 shields the magnetic sensor 8 from the magnetic field generated by the magnet 7.

  At this time, since the output value of the magnetic sensor 8 becomes a high level, the detection circuit 15 detects that the magnetic shielding plate 5 is in the magnetic shielding position (in the space 4 m) and the side stand S is displaced to the storage position. . Then, the detection circuit 15 transmits the detection result to the motorcycle control device via the harness 10.

  According to the above embodiment, the width of the substrate 9 is such that the plate surface of the horizontally long substrate 9 is parallel to the rotation surface R of the side stand S, and one longitudinal side edge 9e of the substrate 9 is directed to the rotation center Q of the side stand S. The narrow one end portion 9a can be disposed in the vicinity of the rotation center Q of the side stand S in a close state. For this reason, the amount of protrusion of the substrate 9 from the rotation center Q of the side stand S is reduced, and the displacement detection device 1 can be reduced in size in the direction parallel to the axial direction of the rotation axis J of the side stand S and the rotation surface R. It becomes possible to plan.

  Moreover, in the said embodiment, the short side edge 9i by the side of the one end part 9a of the board | substrate 9 is made to protrude from the rotation center Q of the side stand S on the opposite side to the other end part 9b with respect to the longitudinal direction of a board | substrate. For this reason, the amount of protrusion of the other end portion 9b of the substrate 9 from the rotation center Q of the side stand S is further reduced, and the displacement detection device 1 in the direction parallel to the rotation surface R of the side stand S is further reduced. Is possible.

  Moreover, in the said embodiment, since the width Wa of the one end part 9a of the board | substrate 9 is made narrow, while the width Wb of the other end part 9b is made wide, it is required in order to mount a circuit and components on the board | substrate 9. An area can be secured.

  Moreover, in the said embodiment, the magnetic sensor 8 is mounted in the one end part 9a of the board | substrate 9, the magnet 7 is arrange | positioned above the magnetic sensor 8, and the shield plate 5 is made to go in and out between the magnetic sensor 8 and the magnet 7. ing. For this reason, the magnetic sensor 8, the magnet 7, and the magnetic shielding plate 5 necessary for detecting the displacement of the side stand S are collected at the rotation center Q of the side stand S and the center of the displacement detection device 1. Miniaturization can be achieved.

  Furthermore, in the said embodiment, the end of the harness 10 for external communication can be easily connected to the wide other end part 9b of the board | substrate 9. FIG. In addition, the harness 10 can be easily pulled out from the position of the side end of the displacement detection device 1 where no parts are gathered.

  The present invention can employ various embodiments other than those described above. For example, in the above embodiment, the Hall IC is shown as an example of the magnetic sensor 8, but the present invention is not limited to this. In addition to this, for example, other magnetic sensors such as a magnetoresistive element and a reed switch may be used.

  Moreover, although the example which mounted the magnetic sensor 8 on the upper surface of the narrow end part 9a of the board | substrate 9 was shown in the said embodiment, this invention is not limited to this. The magnetic sensor 8 may be mounted at any position on any surface of the substrate 9. Further, the detection circuit 15 and one end of the harness 10 may be mounted at any position on any surface of the substrate 9.

  Moreover, in the said embodiment, although the magnet 7 was shown as an example of a magnetic flux generation means, this invention is not limited to this. Besides this, for example, a coil or the like may be used as the magnetic flux generating means.

  Moreover, in the said embodiment, although the magnetic-shield board 5 was shown as a magnetic flux change means, this invention is not limited to this. In addition to this, for example, a magnetic material having a shape other than a plate shape, a conductive member that changes the magnetic flux generated by the magnetic flux generating means by moving, a moving member that moves the magnet relative to the magnetic sensor, and the like. You may make it use as a means.

  Moreover, in the said embodiment, although the magnetic sensor 8 and the detection circuit 15 were shown as an example of a detection means, this invention is not limited to this. In addition to this, for example, a detection circuit that detects the inductive reactance (impedance) of a coil that changes according to magnetic flux and detects the displacement of the side stand S based on the detection result may be used as the detection means.

  In the above embodiment, the example in which the detection circuit 15 determines the displacement of the side stand S based on the output value of the magnetic sensor 8 has been described. However, the present invention is not limited to this. In addition to this, for example, the output value of the magnetic sensor 8 may be transmitted from the detection circuit 15 to another control device of the motorcycle, and the position of the side stand S may be determined by the other control device. That is, the data for determining the displacement of the side stand S may be detected by the displacement detection device 1, and the determination unit may be provided outside the displacement detection device 1.

  Furthermore, in the said embodiment, although the example which applied this invention to the displacement detection apparatus 1 which detects the displacement of the side stand S of a motorcycle was given, the apparatus for detecting the displacement by rotation of a target object other than this was given. In contrast, the present invention can be applied.

DESCRIPTION OF SYMBOLS 1 Displacement detection apparatus 5 Magnetic shielding board 7 Magnet 8 Magnetic sensor 9 Board | substrate 9a One end part 9b The other end part 9e One long side edge 9i One side short side edge 10 Harness 15 Detection circuit S Side stand R Rotation surface Q Rotation center

Claims (5)

Magnetic flux generating means for generating magnetic flux;
Magnetic flux changing means for changing the magnetic flux according to the rotation of the object;
Detecting means for detecting displacement due to rotation of the object based on a change in the magnetic flux;
In a displacement detection device comprising a horizontally long substrate mounted with the detection means,
Narrow the width of one end of the substrate in the longitudinal direction, widen the width of the other end,
The plate surface of the substrate is parallel to the rotation surface of the object,
With one longitudinal side edge of the substrate facing the center of rotation of the object,
Placing the one end of the substrate near the center of rotation of the object;
The displacement detection device, wherein the other end portion of the substrate is arranged at a position away from the rotation center of the object. The displacement detection device according to claim 1,
A displacement detection device characterized in that a short side edge on the one end side of the substrate protrudes from the rotation center of the object to the opposite side to the other end portion with respect to the longitudinal direction of the substrate. . In the displacement detection device according to claim 1 or 2,
The magnetic flux generating means comprises a magnet,
The magnetic flux changing means is made of a magnetic material,
The detection means includes
A magnetic sensor for detecting a change in magnetic flux of the magnet;
A displacement detection apparatus comprising: a detection circuit that detects displacement of the object based on an output value of the magnetic sensor. The displacement detection device according to claim 3,
Mounting the magnetic sensor on the one end of the substrate;
Placing the magnet above the magnetic sensor;
The displacement detection device, wherein the magnetic body enters and exits between the magnetic sensor and the magnet. The displacement detection device according to claim 4,
A displacement detecting device, wherein an electric wire for external communication is connected to the other end of the substrate.

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