JP2006180050A - Fitting tool and fitting structure for super-magnetostriction actuator, and communication method using super-magnetostriction actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting technology of a super-magnetostriction actuator whereby the super-magnetostriction actuator can simply be attached/detached so as to utilize various objects for a sound transmission medium, and to provide a communication method using the super-magnetostriction actuator. <P>SOLUTION: The fitting tool 1 used for the super-magnetostriction actuator 2 includes: a support 11 for fixing and supporting the super-magnetostriction actuator 2; fixed parts 13 freely attachable to/detachable from a fitting object A; and legs 12 each having one end connected to the support 11 and the other end connected to each of the fixed part, and the other end of each leg 12 is freely movable around each connection part 14 of each support part 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for mounting a giant magnetostrictive actuator including a giant magnetostrictive element and a communication technique using the giant magnetostrictive actuator.

  The giant magnetostrictive actuator utilizes the dimensional change (extension / contraction) of the giant magnetostrictive element that occurs according to the strength of the magnetic field, and has recently attracted attention as a high-speed, large displacement, high-power actuator. Conventionally, a giant magnetostrictive element has been used in a general acoustic device such as a speaker by utilizing the characteristics of the giant magnetostrictive element.

  When an electrical signal is input as an audio signal, the acoustic instrument generates a magnetic field according to the electric signal, and further expands and contracts the giant magnetostrictive element by the magnetic field, thereby vibrating the diaphragm, thereby It was shaking and outputting sound.

  For example, Patent Document 1 discloses a magnetic field generating unit that generates a magnetic field according to an audio signal input as an electric signal through an input signal line, a giant magnetostrictive element that expands and contracts in accordance with the magnetic field, and the giant magnetostriction. A magnetostrictive vibration part 101 having a case for accommodating an element and the magnetic field generating means, and a lid for sealing the case so as to be in direct contact with the giant magnetostrictive element; and And a holding device 102 for holding the device so as to be able to come into contact therewith (see FIG. 15).

  This acoustic instrument is designed to assume the peripheral part of the ear in the head of the human body, and to design the shape of the magnetostrictive vibration part 101. Further, the magnetostrictive vibration part 101 can be brought into contact with the peripheral part of the ear. By providing the holding portion 102 for holding the head, a so-called headphone form can be configured. According to such an acoustic instrument, there is a possibility that even a person with weak hearing ability or a person who has lost hearing ability can easily listen to music in the same manner as a healthy person.

  Since the acoustic instrument configured as described above transmits sound by the vibration of the magnetostrictive vibration part 101, it is necessary to attach the magnetostrictive vibration part 102 to the ear peripheral part, which is an attachment object, accurately. Therefore, the holding unit 102 is designed to have a shape that can be attached to an object in accordance with the shape of the magnetostrictive vibrator. For example, in order to use it in another form instead of the form of headphones, It was necessary to design a proper holding part.

Therefore, although it is a giant magnetostrictive actuator that can be originally applied to various uses, it takes time to mount the actuator, and it is difficult to install it at an appropriate place as necessary. For this reason, it has not been able to be fully utilized, which has hindered the widespread use of giant magnetostrictive actuators.
Japanese Patent Laid-Open No. 2001-258095

  The present invention has been made in view of the above-mentioned various problems, and a giant magnetostrictive actuator mounting technique that allows a giant magnetostrictive actuator to be easily attached and detached and that can utilize various objects as a sound transmission medium, and It is a technical problem to provide a communication method using a giant magnetostrictive actuator.

  The present invention is configured as follows in view of the above problems. That is, the present invention includes a giant magnetostrictive element, a coil that applies a magnetic field change to the giant magnetostrictive element, a spring that applies a compressive load to the giant magnetostrictive element, a magnet that applies a bias magnetic field to the giant magnetostrictive element, the giant magnetostrictive element, An attachment jig used for a giant magnetostrictive actuator comprising a case for storing a coil, a spring and a magnet, and a movable rod connected to a free end of the giant magnetostrictive element, and a support portion for fixing and supporting the giant magnetostrictive actuator And a leg part having a fixing part detachably attached to the mounting object, and one end connected to the support part and the other end connected to the fixing part, and the other end of the leg part is the support. A jig for attaching a giant magnetostrictive actuator, characterized in that the jig can be moved around a connecting portion with the portion.

  The super magnetostrictive actuator mounting jig according to the present invention includes a super magnetostrictive actuator fixedly supported on the support portion, and the fixed portion is fixed to an object via a leg portion connected to the support portion. The magnetostrictive actuator can be attached to a predetermined position of the object. Since the other end of the leg portion connected to the fixed portion is movable around the connecting portion with the support portion, the giant magnetostrictive actuator can be attached to the attachment object in an appropriate arrangement. Moreover, since the fixing portion fixed to the attachment object is detachable, the attachment location can be easily changed.

  In order to effectively use the giant magnetostrictive actuator, an accurate mounting arrangement is required in order to accurately transmit the vibration of the giant magnetostrictive element. However, various tangible objects can be applied to the attachment object of the giant magnetostrictive actuator, and the attachment surface is not limited to a smooth surface but also includes an uneven surface. Since the attachment jig according to the present invention can move the giant magnetostrictive actuator to an appropriate arrangement, it can be suitably used particularly for an attachment object other than a smooth surface.

  In addition, the giant magnetostrictive actuator according to the present invention may be any configuration as long as the giant magnetostrictive element can be expanded and contracted by a change in the magnetic field and thereby the giant magnetostrictive element can be vibrated.

  However, for example, a giant magnetostrictive element, a coil that applies a magnetic field change to the giant magnetostrictive element, a spring that applies a compressive load to the giant magnetostrictive element, and a magnet that applies a bias magnetic field to the giant magnetostrictive element are housed in the case. The magnetostrictive element is a giant magnetostrictive actuator in which a proximal end of the magnetostrictive element is positioned in a case, a movable rod is connected to a free end, and a spring is disposed between the movable rod and the case. It is desirable to be characterized by being formed of a magnetic material.

  According to the above configuration, since the case, the movable rod, and the spring are made of a magnetic material, the magnetic field generated by the bias magnetic field applying magnets disposed at both ends of the giant magnetostrictive element passes through the movable rod, the spring, and the case. Complete magnetic circuit (closed loop). Thereby, high efficiency of the giant magnetostrictive actuator can be realized. Furthermore, by achieving high efficiency in this way, it is possible to reduce the size accordingly, and the restrictions on the application and installation location to be applied can be reduced, thereby contributing to further widespread use.

  The attachment object according to the present invention may be any material as long as it has a hardness capable of transmitting the vibration of the giant magnetostrictive actuator, and various materials are suitable. Can be used.

  In the giant magnetostrictive actuator mounting jig according to the present invention, it is preferable that one end of the leg portion is movable around a connecting portion with the fixed portion. Since one end of the leg portion is movable around the connecting portion with respect to the fixing portion, not only the relative angle between the support portion and the leg portion but also the relative angle between the leg portion and the fixing portion can be adjusted. Therefore, it is possible to further improve the mounting accuracy of the giant magnetostrictive actuator.

  Further, in the attachment jig for the giant magnetostrictive actuator according to the present invention, it is desirable that the fixed portion is a magnetic material. By using the fixing portion as a magnetic member, when the attachment object is a magnetic member, it can be easily attached and detached by a magnetic force, and the efficiency of attachment and removal work can be improved.

  In addition, when the attachment object is not a magnetic member, it is desirable that the fixing portion is an adsorption member. The suction member is a member in which, for example, the suction cup itself has a suction force. That is, an efficient attachment method suitable for the attachment object can be provided by appropriately changing the material of the fixing portion according to the attachment object.

  In addition, the object to which the attachment jig for the giant magnetostrictive actuator according to the present invention is attached may be a structural member such as a floor, a pillar, or a wall that constructs a building, or a steel tower. Conventionally, in large-scale structures such as buildings and steel towers, when working with multiple people at the time of construction, inspection, repair, etc., when working in a remote place, mobile phones, transceivers, etc. The communication means was used for communication.

  However, for example, during construction of the building and the steel tower, the surrounding noise is large and difficult to hear, and the sound quality may not be satisfactory. In addition, mobile phones and transceivers consume a large amount of power and may not be usable unless they are fully charged. That is, the mobile phone and the transceiver have various limitations in use.

  Since the attachment jig of the giant magnetostrictive actuator according to the present invention can be easily attached and detached at an appropriate place, it is possible to easily output a high quality sound by using it for a structural member of a building, a steel tower or the like. Become. Further, since the power consumption is smaller than that of the cellular phone and the transceiver, the various restrictions can be reduced.

  Moreover, the attachment object which attaches the attachment jig | tool of the giant magnetostrictive actuator which concerns on this invention has a hollow part, It is good also considering the giant magnetostrictive actuator being fixed to the internal peripheral surface. Examples of the object having the hollow portion include a pipe used during construction of a building or the like. By attaching to the inner surface of the attachment object, the vibration of the giant magnetostrictive element is transmitted to the surface of the object and sound can be output from the object. Moreover, since it cannot contact from the outside, it is not affected by the weather such as external rain, and it is possible to prevent damage due to external force.

  The present invention also includes a giant magnetostrictive element, a coil that applies a magnetic field change to the giant magnetostrictive element, a spring that applies a compressive load to the giant magnetostrictive element, a magnet that applies a bias magnetic field to the giant magnetostrictive element, the giant magnetostrictive element, A mounting structure for mounting a giant magnetostrictive actuator having a coil, a spring, and a magnet to a mounting object, and a support portion for fixing and supporting the giant magnetostrictive actuator, and a detachable attachment to the mounting object And a support portion and a fixed portion are movable around the connecting portion. The giant magnetostrictive actuator mounting structure is characterized in that the fixed portion and the fixed portion are connected.

  According to the attachment structure of the giant magnetostrictive actuator, the support portion on which the giant magnetostrictive actuator is supported and the fixed portion fixed to the object are movable around the connecting portion, and therefore move relative to each other. Thus, the relative angle between the giant magnetostrictive actuator and the object can be adjusted. Therefore, the giant magnetostrictive actuator can be attached with an accurate arrangement.

Furthermore, in the attachment structure of the giant magnetostrictive actuator according to the present invention, the support part and the fixed part are connected via a leg part, and the connection part of the support part and the leg part, and the connection part of the leg part and the fixed part are In addition, it is desirable to be movable around the connecting portions. According to the attachment structure, not only the support portion and the leg portion but also the relative angle between the leg portion and the attachment object can be adjusted, so that the attachment accuracy of the giant magnetostrictive actuator can be further improved.

  The present invention also relates to a communication method using a giant magnetostrictive element actuator attached by a giant magnetostrictive actuator attachment jig, wherein the attachment jig is placed on a structural member of a building and a metal attachment object such as a steel tower. A giant magnetostrictive actuator is fixed through the transmission, the vibration of the giant magnetostrictive actuator is transmitted to an attachment object, and communication is performed using the attachment object as a medium.

  The communication method using the giant magnetostrictive actuator according to the present invention can communicate using the giant magnetostrictive actuator with a simple structure and using a structural member of a building, a steel tower, and the like as a sound transmission medium. Since the mounting jig for the giant magnetostrictive actuator can be easily attached and detached as described above, it can be used by appropriately changing the location even when the user moves, so it can be used in various places and applications. It becomes possible.

  According to the technique for attaching a giant magnetostrictive actuator according to the present invention, the giant magnetostrictive actuator can be attached in an appropriate arrangement. In addition, according to the present invention, since the giant magnetostrictive actuator can be easily attached and detached, various attachment objects can be used as a sound transmission medium.

<Embodiment 1>
Hereinafter, a preferred embodiment 1 of the present invention will be described with reference to the drawings. The first embodiment is an embodiment of communication in which a giant magnetostrictive actuator 2 is attached to a railway track A and the track A is used as a medium. FIG. 1 is a perspective view of a state in which the attachment jig 1 of the giant magnetostrictive actuator 2 according to the first embodiment is attached to the line A, and FIG. 2 is a plan view of FIG. 3 is a cross-sectional view taken along the line XX of FIG. FIG. 4 is a schematic configuration diagram of a communication method using the line A according to the first embodiment as a medium. FIG. 5 is a cross-sectional view of the giant magnetostrictive actuator 2 used in the present embodiment.

  First, the mounting jig 1 for the giant magnetostrictive actuator 2 will be described in detail with reference to FIGS. The mounting jig 1 includes a plate-like support portion 11 to which the giant magnetostrictive actuator 2 is fixed, a leg portion 12 having one end connected to each of four corners of the support portion, and the other end of the leg portion 12. And a fixed portion 13 connected thereto. A rotating shaft 14 is passed through the connecting portion between the respective portions, and each portion can be relatively moved in the rotating direction by the rotating shaft 14.

  Since each part can be relatively moved in the rotation direction, the height of the mounting jig 1 and the mounting angle with respect to the mounting target can be adjusted, and the giant magnetostrictive actuator 2 can be mounted on the line A with an appropriate arrangement. it can. For example, as shown in FIG. 6, even if the object A is a curved surface, the giant magnetostrictive actuator can be fixed to the attachment object in an appropriate arrangement by changing the relative angles of the respective parts.

  The fixing portion 13 includes a connecting portion 13 a connected to the other end of the leg portion 12, and a fixing portion 13 b that contacts the line A and fixes the attachment jig 1 to the line A. The adhering portion 13b may be anything that can be fixed by contacting the line A, and an adsorbing member such as a suction cup or a magnetic member such as a magnet can be used. In this Embodiment 1, it was set as the magnet for the track | line A whose target object is a metal member. By using the magnet, the attachment jig 1 can be easily fixed to the line A by bringing the fixing portion 13b into contact with a place to be a communication base point. Further, the removal can be easily performed because it is only necessary to apply an external force that exceeds the attractive force of the magnet.

  Next, the giant magnetostrictive actuator 2 fixed to the mounting jig 1 will be described in detail with reference to FIG. The giant magnetostrictive actuator 2 includes a giant magnetostrictive element 27, a coil 28 that applies a magnetic field change to the giant magnetostrictive element 27, a spring 24 that applies a compressive load to the giant magnetostrictive element 27, and a magnet that applies a bias magnetic field to the giant magnetostrictive element 27 ( Magnets 25 and 26 are accommodated in the case 21. A base end of the giant magnetostrictive element 27 is positioned in the case 21, a movable rod 22 is connected to the free end, and a spring 24 is disposed between the movable rod 22 and the case 21. The case 21, the movable rod 22 and the spring 24 are made of a magnetic material such as iron.

  The case 21 includes a bottomed cylindrical case main body 21a opened at one end side (upper end in FIG. 5), and a lid 23 for closing the opening of the case main body 21a. In this embodiment, the spring 24 is formed as a disc spring. The distal end of the movable rod 22 penetrates through the central portion of the disc spring 24 and the holes 24a and 23b provided coaxially in the lid 23 and protrudes to the outside. The peripheral edge of the disc spring 24 is in close contact with the inner surface of the case main body 21 a and covers the hole 23 b of the lid 23 from the inside of the case 21.

  A disc spring recess (first recess) 23 a is provided on the inner surface of the lid 23 to fit and position the peripheral edge of the disc spring 24. The reason why the first recess 23a for positioning by inserting the peripheral edge of the disc spring 24 into the inner surface of the lid 23 is provided is to reliably position the disc spring 24 itself. Further, the movable rod 22 penetrating through the central portion of the disc spring 24 can also be positioned (centered) by the disc spring 24. The flange 22b of the movable rod 22 has a two-stage configuration having a step part 22c in the middle. By fitting the hole 24a at the center of the disc spring 24 into the stepped portion 22c, a close contact structure is obtained.

  Magnets 25 and 26 for applying a bias magnetic field to the giant magnetostrictive element 27 are disposed at the proximal end and the free end of the giant magnetostrictive element 27, respectively. The base end of the movable rod 22 is provided with a connecting recess (second recess) 22a for fitting and positioning the free end of the giant magnetostrictive element 27 and the magnet 25 disposed at the free end. A flange 22b is provided at the base end of the movable rod 22 to increase the diameter of the base end. The second recess 22a is formed as a recess having a downward opening. The depth of the second recess 22 a is formed deeper than the thickness of the magnet 25. Thereby, the magnet 25 is accommodated in the second recess 22a, and the free end of the giant magnetostrictive element 27 is also inserted.

  The second recess 22a having such a depth is provided because both the free end of the giant magnetostrictive element 27 and the magnet 25 disposed at the free end are coaxial with the movable rod 22 by the second recess 22a. This is to enable positioning. Thereby, the free end of the giant magnetostrictive element 27, the magnet 25 arranged at the free end, and the base end of the movable rod 22 can be centered and connected with high accuracy so as not to be displaced. As a result, the giant magnetostrictive element 27, the magnet 25, and the movable rod 22 can be connected without using an adhesive or the like. Of course, it can also be connected by an adhesive or the like.

  The bottom surface portion 21b of the case body 21a is provided with a positioning recess (third recess) 21c for fitting and positioning the base end portion of the giant magnetostrictive element 27 and the magnet 26 arranged at the base end portion. . The third recess 21c is formed as a recess having an upward opening. The depth of the third recess 21 c is formed deeper than the thickness of the magnet 26. Thereby, the magnet 26 is accommodated in the third recess 21c, and the base end of the giant magnetostrictive element 27 is also inserted.

The third recess 21c having such a depth is provided by the third recess 21c so that both the base end of the giant magnetostrictive element 27 and the magnet 26 disposed at the base end are provided on the bottom surface portion 21b of the case body 21a.
This is because it is positioned coaxially with respect to. Thereby, the base end of the giant magnetostrictive element 27 and the magnet 26 arranged at the base end can be centered and positioned with high accuracy so as not to be displaced from the bottom surface portion 21b of the case main body 21a.

  A bobbin concave portion (fourth concave portion) 21d for fitting and fixing a part of the bobbin 29 of the coil 28 is provided on the bottom surface portion 21b of the case main body 21a. The bobbin 29 has a cylindrical portion through which the giant magnetostrictive element 27 passes and disk-shaped flanges provided at both ends thereof. Accordingly, the planar shape of the fourth recess 21 d is formed as a so-called donut-shaped recess corresponding to the shape of the end face of the bobbin 29. The fourth recess 21d is provided because the bobbin 29 of the coil 28 is reliably positioned with respect to the bottom surface portion 21b of the case body 21a, and the gap between the giant magnetostrictive element 27 and the bobbin 29 is made with high accuracy. This is because it is possible to set a minute gap. A cylindrical rib is raised at the central portion of the bottom surface portion 21b, and the third concave portion 21c and the fourth concave portion 21d are formed by this rib.

  In the first embodiment, the case 21 including the case main body 21a and the lid 23, the movable rod 22, and the disc spring 24 are formed of a magnetic material, and the bobbin 29 of the coil 28 is heated. It is made of conductive resin. Examples of the thermally conductive resin include (trade name: NT-783) manufactured by Nippon Kagaku Yakin. The reason why the bobbin 29 is formed of a heat conductive resin is to improve the heat dissipation of the bobbin 29 itself. That is, this is to enhance the heat radiation effect from the coil 28 and the giant magnetostrictive element 27 that generate heat. By enhancing the heat dissipation effect, it is possible to fundamentally solve the problem that the respective characteristics change due to heat generation, the vibration state changes, and the high frequency characteristics deteriorate.

  Further, according to the first embodiment, since the case 21, the movable rod 22 and the disc spring 24 are made of a magnetic material, the bias magnetic field applying magnets 25 disposed at both ends of the giant magnetostrictive element 27, The magnetic field by 26 constitutes a complete magnetic circuit (closed loop) passing through the movable rod 22, the disc spring 24 and the case 21, as shown by a broken line with an arrow in FIG. 5. Thereby, high efficiency of the giant magnetostrictive actuator can be realized. As a result, battery driving can also be realized, and this giant magnetostrictive actuator can be incorporated into, for example, a mobile product. Furthermore, by increasing the efficiency in this way, it is possible to reduce the size accordingly.

  Further, since the movable rod 22, the disc spring 24, the giant magnetostrictive element 27, the magnets 25 and 26 for applying the bias magnetic field, the bobbin 29, and the like are positioned by the first to fourth recesses, the actuator is resistant to vibration and the like. , Mobile can be facilitated.

  Next, an attachment method for attaching the giant magnetostrictive actuator 2 configured as described above to the line A will be described. First, the giant magnetostrictive actuator 2 is fixed to the support portion 11 of the mounting jig 1. This fixing method is not particularly limited, and examples thereof include an adhesive method using a screw member and an adhesive material. Next, the diaphragm 30 is fixed to the tip of the movable rod 22 of the giant magnetostrictive actuator 2. By fixing the diaphragm 30 to the tip of the movable rod 22, the vibration of the giant magnetostrictive actuator 2 can be transmitted to the line A over a wide area.

  Next, the mounting jig 1 is arranged on the line A so that the diaphragm 30 fixed to the tip of the movable rod 22 of the giant magnetostrictive actuator 2 and the line A are in contact. The mounting jig 1 arranged on the track A is fixed on the track A by the fixing portion 13. Next, the connecting portion between the support portion 11 and the leg portion 12 of the mounting jig 1 and the connecting portion between the leg portion 12 and the fixing portion 13 are moved in the rotation direction so that the diaphragm 30 and the line A are in contact with each other. Further, during this adjustment, the contact pressure between the giant magnetostrictive actuator 2 and the line A is also adjusted.

In the first embodiment, the diameter of the giant magnetostrictive element is 3 mm, and the giant magnetostrictive actuator 2 is adjusted to be added to the line A by 0.35 kg. However, this value is desirably changed depending on the embodiment, and may be in a range not exceeding 5 kg / cm ² in the area of the giant magnetostrictive element 27 of the giant magnetostrictive actuator 2.

  As described above, the giant magnetostrictive actuator 2 can be easily attached to the line A, which is an object, in an appropriate arrangement. Further, since the fixing portion 13b of the mounting jig 1 is a magnet, it can be easily detached and can be used by being moved to an appropriate place. As a result, as shown in FIG. 4, communication can be performed using the line A as a sound transmission medium by the giant magnetostrictive actuator attached on the line A. In the first embodiment, the giant magnetostrictive actuator is attached to the line A, but the present invention is not limited to this, and can be applied to various buildings and members. For example, as shown in FIG. 7, it can attach to a steel tower and can communicate using the structural member of a steel tower as a sound transmission medium.

<Embodiment 2>
The second embodiment is an embodiment of the attachment tool 3 in which the attachment jig 1 of the first embodiment is further provided with an adjusting member 15 for adjusting the angle. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. FIG. 8 is a perspective view of the mounting jig 3 according to the second embodiment.

  As with the mounting jig 1 according to the first embodiment, the mounting jig 3 includes a support portion 11 that fixes and supports the giant magnetostrictive actuator 2, a leg portion 12 that is connected to the support portion 11, and a leg portion 12. A fixed portion 13 that is connected and detachable from the object, and a rotating shaft 14 provided at each connecting portion, and an adjustment member 15 for adjusting the relative angle between the support portion 11 and the leg portion 12 are provided. It has.

  The adjusting member 15 is a member that adjusts the relative position of the support portion 11 and the leg portion 12 that are movable in the rotation direction in the mounting jig 1 and fixes the mounting portion 1 at an appropriate position. The adjustment member 15 includes a shaft member 15a in which a screw is screwed in the opposite direction from the center, and nuts 15b and 15c that are screwed with the shaft member 15a.

  The adjustment member 15 is attached by penetrating through a hole portion of the bracket 12a erected on the leg portion 12, and nuts 15b and 15c are screwed into the shaft member 15a on the inner side and the outer side across the bracket 12a. Yes. The bracket 12a is attached so as to be movable in the rotational direction by a stripper bolt 12b penetrating through a hole provided in the leg (see FIG. 9). By rotating the outer nut 15c, the shaft member 15a rotates, the inner nut 15b also rotates, and each nut moves toward the center side or moves sideways along the shaft member 15a. Therefore, the distance between the adjacent leg portions 12 expands and contracts, and the leg portion 12 moves relative to the support portion 11.

  As described above, according to the mounting jig 3 according to the second embodiment, the relative angle between the leg portion 12 and the support portion 11 can be easily finely adjusted, and the mounting accuracy of the giant magnetostrictive actuator 2 can be further increased. Can be improved. In addition, since the adjacent leg portions 12 can be joined by providing the adjustment member 15, it is possible to maintain an accurate arrangement without being affected by external forces such as swinging during use.

<Embodiment 3>
The third embodiment is an example in which the giant magnetostrictive actuator 2 is arranged inside a pipe B that is a structural member of a building. FIG. 10 is a diagram in which the giant magnetostrictive actuator 2 is fixed to the mounting jig 4 according to the third embodiment. FIG. 11 is a cross-sectional view of a state where the attachment jig 4 of the giant magnetostrictive actuator 2 according to the third embodiment is attached to the pipe B. 12 is a cross-sectional view of FIG. 11 rotated approximately 90 degrees.

  The mounting jig 4 according to the third embodiment includes a support portion 41 in which the support portion 11 and the diaphragm 30 provided separately in the first and second embodiments are integrated, and a fixing portion 43. Are provided on the legs 42. Further, the support part 41 and the leg part 42 are formed by bending a single metal plate, and both ends of the support part 41 are leg parts 42. The bent portions of the support portion 41 and the leg portion 42 are swingable and are configured so that the angle can be adjusted (see FIG. 10).

  The fixing portion is a screw hole portion 43 formed substantially at the center of the leg portion 42, and a screw member 46 is passed through the screw hole portion 43 and a hole portion formed on the side surface of the pipe B. The mounting jig 4 can be fixed to the pipe B by the screw member 46.

  Further, the mounting jig 4 includes a mounting table 44 for mounting the giant magnetostrictive actuator 2 to the support portion 41. The mounting table 44 penetrates through a side wall 44a erected on the support part 41, a canopy 44b connected to the upper end of the side wall 44a, and a hole formed in the canopy 44b, and engages with the giant magnetostrictive actuator 2. Adjustment screw 44c.

  The giant magnetostrictive actuator 2 used in the present embodiment includes a collar portion 21e extending from the case body 21a in the outer circumferential direction, and the collar portion 21e and the side wall 44a of the mounting table 44 are engaged. In this way, the giant magnetostrictive actuator 2 is connected to the mounting table 44.

  The adjusting screw 44 c is in contact with the bottom surface portion 21 b of the giant magnetostrictive actuator 2. By adjusting the adjusting screw 44c, the giant magnetostrictive actuator 2 can be pressed downward, and the contact pressure between the giant magnetostrictive actuator 2 and the support portion 41 can be adjusted.

  Next, a method for attaching the giant magnetostrictive actuator 2 to the pipe B using the attachment jig 4 will be described in detail. First, the giant magnetostrictive actuator 2 is fixed to the mounting table 44 of the mounting jig 4. At this time, the movable rod 22 of the giant magnetostrictive actuator 2 is disposed so as to contact the support portion 41 of the mounting jig 1. Then, the contact pressure between the giant magnetostrictive actuator 2 and the support portion 41 is adjusted by the adjusting screw 44c as necessary.

  After the giant magnetostrictive actuator 2 is fixed to the mounting jig 4, the screw hole 43 formed in the leg 42 and the hole of the pipe B are overlapped and joined by a screw member 46. Since the bending angle of the bent portion of the mounting jig 4 can be adjusted, the bending angle can be adjusted according to the diameter of the pipe B and screwed together.

  As described above, according to the third embodiment, the giant magnetostrictive actuator 2 can be easily attached to the inside of the pipe B that is an object. Moreover, since the fixing method of the attachment jig 4 and the pipe B is the screwing by the screw member 46, it can also be removed easily. Therefore, the location can be changed as necessary and used. In addition, by installing the giant magnetostrictive actuator 2 in the pipe B in this way, the pipe B can be used as a sound transmission medium. In addition to structural members of buildings, for example, railings for trains, buses, etc. Can be used as a sound transmission medium.

<Embodiment 4>
The fourth embodiment is another example in which the giant magnetostrictive actuator 2 is arranged inside a pipe B that is a structural member of a building. FIG. 13 is a diagram in which the giant magnetostrictive actuator 2 is fixed to the mounting jig 5 according to the fourth embodiment. 14 is a cross-sectional view of FIG.

The support member of the mounting jig 5 is a clamp unit 51 having a hole 51a in which a giant magnetostrictive actuator is erected, and the lower surface thereof is in close contact with the inner surface of the pipe B. The clamp unit 51 has a parallel spring mechanism including an adjustment hole 52 formed below the clamp unit 51 and an adjustment screw 53 inserted into the adjustment hole 52.

  The adjustment hole 52 has a tapered inclined surface with a gradually decreasing inner diameter. When the adjustment screw 53 is pushed into the adjustment hole 52, the upper side of the hole 51a of the clamp unit 51 is shown in FIG. It is possible to move the mounted giant magnetostrictive actuator 2 by bending upward with the indicated point X as a fulcrum. If the amount of deflection is small, the clamp unit 51 moves upward, so that the contact pressure between the giant magnetostrictive actuator and the pipe inner surface can be adjusted by a parallel spring mechanism.

  That is, the adjustment screw 53 can move the upper side of the adjustment hole 52 of the clamp unit 51 in the vertical direction and the rotation direction, and the tip of the movable rod 22 of the mounted super magnetostrictive actuator 2 is placed at an appropriate position on the pipe B. It can be made to contact.

  When the diameter of the pipe B is large and the position adjustment by the adjusting screw 53 is not sufficient, the height adjustment is performed by inserting a spacer in the hole 51a of the clamp unit 51 where the giant magnetostrictive actuator 2 is erected. It can be carried out. However, if the spacer is inserted too much, the giant magnetostrictive actuator 2 may not be sufficiently inserted into the clamp unit 51, and the giant magnetostrictive actuator 2 may not be disposed substantially perpendicular to the clamp unit 51. The depth of the giant magnetostrictive actuator 2 inserted into the clamp unit 51 is preferably about 2/3 or more of the outer shape of the giant magnetostrictive actuator 2, and it is desirable to perform adjustment with a spacer within the range.

  According to the attachment jig 5 according to the fourth embodiment, the giant magnetostrictive actuator 2 can be easily attached to the inside of the pipe B, which is the object, in an appropriate arrangement. Moreover, the attachment jig 5 can also be easily removed, and it can be used by appropriately changing the location as necessary.

  The embodiments of the giant magnetostrictive actuator mounting jig and the communication method using the giant magnetostrictive actuator according to the present invention have been exemplarily described above, but the present invention is not limited to these, and includes combinations of these as much as possible. It is a waste.

FIG. 3 is a perspective view of a state where the attachment jig 1 of the giant magnetostrictive actuator 2 according to Embodiment 1 is attached to a track A. FIG. 3 is a plan view of a state in which the attachment jig 1 of the giant magnetostrictive actuator 2 according to Embodiment 1 is attached to a line A. It is XX sectional drawing of the attachment jig 1 shown in FIG. 2 is a schematic configuration diagram of a communication method using the line A of Embodiment 1 as a medium. FIG. 2 is a cross-sectional view of a giant magnetostrictive actuator 2 used in Embodiment 1. FIG. It is sectional drawing of the state which attached the attachment jig | tool 1 of the giant magnetostrictive actuator 2 which concerns on Embodiment 1 to the target object of a curved surface. It is the structure schematic of the communication method which used the structural member of the steel tower as a medium. 6 is a perspective view of an attachment jig 3 according to Embodiment 2. FIG. It is sectional drawing which shows the attachment structure of the bracket 12a of the attachment jig 3 shown in FIG. 6 is a cross-sectional view of a mounting jig 4 according to Embodiment 3. FIG. FIG. 6 is a cross-sectional view of a state where an attachment jig 4 according to Embodiment 3 is attached to a pipe B. FIG. 6 is a cross-sectional view of a state where an attachment jig 4 according to Embodiment 3 is attached to a pipe B. It is sectional drawing of the state which attached the attachment jig | tool 5 which concerns on Embodiment 4 to the pipe B. It is sectional drawing of the state which attached the attachment jig | tool 5 which concerns on Embodiment 4 to the pipe B. It is a perspective view which shows the structure of the headphones as a conventional acoustic instrument.

Explanation of symbols

1, 3, 4, 5 Mounting jig 11, 41 Support portion 12, 42 Leg portion 12a Bracket 13, 43 Fixing portion 13a Connecting portion 13b Adhering portion 14 Rotating shaft 15 Adjustment member 15a Shaft member 15b, 15c Nut 44 Mounting base 44a Side wall 44b Canopy 44c Adjustment screw 46 Screw member 51 Clamp unit 51a Hole portion 52 Adjustment hole portion 53 Adjustment screw 2 Super magnetostrictive actuator 21 Case 21a Case body 21b Bottom surface portion 21c Third recess 21d Fourth recess 21e Collar portion 22 Movable rod 22a 2 concave portion 22b flange 22c step portion 23 lid 23a first concave portion 23b hole 24 disc spring 24a hole 25, 26 magnet 27 super magnetostrictive element 28 coil 29 bobbin 30 diaphragm A line B pipe

Claims (10)

A giant magnetostrictive element, a coil that applies a magnetic field change to the giant magnetostrictive element, a spring that applies a compressive load to the giant magnetostrictive element, a magnet that applies a bias magnetic field to the giant magnetostrictive element, and the giant magnetostrictive element, coil, spring, and magnet A mounting jig used for a giant magnetostrictive actuator comprising a housing case and a movable rod connected to the free end of the giant magnetostrictive element,
A support portion for fixing and supporting the giant magnetostrictive actuator;
An attachment object and a detachable fixing part;
A leg portion having one end connected to the support portion and the other end connected to the fixed portion;
An attachment jig for a giant magnetostrictive actuator, wherein the other end of the leg portion is movable around a connecting portion with the support portion.   The attachment jig for a giant magnetostrictive actuator according to claim 1, wherein one end of the leg portion is movable around a connecting portion with the fixed portion.   The said fixing | fixed part is a magnetic material, The attachment jig | tool of the giant magnetostrictive actuator of Claim 1 or Claim 2 characterized by the above-mentioned.   The jig for attaching a giant magnetostrictive actuator according to claim 1, wherein the fixing portion is an adsorption member.   The said support part serves also as the diaphragm which transmits the vibration of the said giant magnetostrictive actuator to a mounting target object, The attachment jig | tool of the giant magnetostrictive actuator in any one of Claims 1-4 characterized by the above-mentioned.   The attachment jig for a giant magnetostrictive actuator according to any one of claims 1 to 5, wherein the attachment object is a structural member such as a floor, a pillar, or a wall that constructs a building, or a steel tower.   The attachment object of the giant magnetostrictive actuator according to any one of claims 1 to 6, wherein the attachment object has a hollow portion, and the giant magnetostrictive actuator is fixed to an inner peripheral surface thereof. Ingredients. A giant magnetostrictive element, a coil that applies a magnetic field change to the giant magnetostrictive element, a spring that applies a compressive load to the giant magnetostrictive element, a magnet that applies a bias magnetic field to the giant magnetostrictive element, and the giant magnetostrictive element, coil, spring, and magnet An installation structure for attaching a giant magnetostrictive actuator having a housing case to an attachment object;
A support portion that fixes and supports the giant magnetostrictive actuator and a fixed portion that can be attached to and detached from an attachment object are connected to each other, and the support portion and the fixed portion are movable around the connection portions. A giant magnetostrictive actuator mounting structure characterized by the above.   The support part and the fixed part are connected via a leg part, and the connection part of the support part and the leg part, and the connection part of the leg part and the fixed part are movable around each other. The structure for mounting a giant magnetostrictive actuator according to claim 8. A communication method using a giant magnetostrictive actuator attached by the attachment jig of the giant magnetostrictive actuator according to any one of claims 1 to 7,
A super magnetostrictive actuator is fixed on a structural member of a building and a mounting target such as a steel tower via the mounting jig, and vibrations of the super magnetostrictive actuator are transmitted to the mounting target, and the mounting target is used as a medium. A communication method using a giant magnetostrictive actuator characterized by performing communication.

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