JP2006147671A - Device for driving a plurality of elements - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce size and weight of a device for driving a plurality of elements and also improve response property of the same device. <P>SOLUTION: A plurality of magnets 3 are allocated in two dimensions on the upper surface of a magnet fixing plate 1 in the device 22 for driving a plurality of elements. The magnets provided side by side have the opposite polarities. In the upper part of the magnets, a center yoke 10 is mounted and a coil 5 provided with mounted drive element 6 at the upper part thereof is inserted to the center yoke. A housing 2x is formed of a cover 2 where a hole is formed to the position corresponding to the position of the drive element, a side yoke 7, and a magnet fixing plate 1; and the coil and magnets are accommodated within this housing. When the electrical power is supplied to the coil, the drive element pushes the coil to the outside of housing. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a plurality of drive devices using a plurality of drive elements, and more particularly to a drive device that drives each drive element to project and retract independently.

  An example of a driving device having a plurality of conventional driving elements is described in Patent Document 1. In the driving apparatus described in this publication, a magnetic field is generated in the entire plurality of display elements, and each display element is driven independently by passing a current through a coil attached to each display element. Since a yoke for confining magnetic force is not required for each display element, it is possible to realize a smaller and lighter weight than when a solenoid is used.

  This drive device is configured as follows. A magnet is attracted to the inner bottom of the box-shaped yoke, and a plate-shaped yoke is attracted to the upper surface of the magnet. A rod-shaped yoke is made to stand on the plate-shaped yoke. A cylindrical display element wound with a coil is placed on a rod-shaped yoke. The conductive wire of the coil is fixed to the power supply line in the box-shaped yoke with a margin for the display element stroke. The tip of the display element is passed through a hole formed in the upper surface of the box-shaped yoke. A magnetic field is generated between the rod-shaped yoke and the box-shaped yoke, and when a current is passed through the coil located between these, the coil advances and retreats.

JP 2000-89895 A

  In the driving device described in Patent Document 1, the strength of the magnetic field is different between the central portion and the peripheral portion of the box-shaped yoke. Therefore, if the same driving force is to be applied to each display element, it is necessary to change the amount of current depending on the position of each display element, change the number of turns of the coil, or make the yoke sufficiently thick. there were. Then, the strength of the magnetic field must be calculated for each display element, and the necessary amount of current and the number of turns of the coil have to be set. Since the yoke is a metal such as iron, the thickness of the device increases when the yoke is thick.

  When the box-shaped yoke is used, the strength of the magnetic field changes inside and outside the box-shaped yoke, and the driving force changes greatly as the coil moves from the inside to the outside of the box-shaped yoke. In order to obtain a uniform driving force regardless of the position of the coil, it is necessary to change the amount of current according to the position of the coil, or to thicken the box-shaped yoke and move the coil only within the yoke. Further, if the number of turns of the coil is increased to obtain a high output with a small current, the coil wire diameter is reduced due to space limitations. When the density of the display elements is increased, it is necessary to densely wire coils having a thin wire diameter, and the assemblability is deteriorated.

  The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to reduce the size and weight of a multi-element driving device and to reduce uneven driving force due to the arrangement position of elements. Another object of the present invention is to improve the assemblability of a multi-element drive device.

  A feature of the present invention that achieves the above object is that a plurality of magnets are fixedly arranged in a two-dimensional manner in a container, and a coil is arranged so as to be movable above each magnet. A drive element extending in the vertical direction is arranged, and a hole through which the drive element can pass is formed on the upper surface of the container.

  In this feature, it is preferable that the coil is accommodated in the container, the drive element is fixed to the upper surface of the coil, and the polarities of the adjacent magnets are made different from each other. Also, the coil is housed in a container, the drive element is formed of a hollow member fixed to the upper surface of the coil, and a central yoke inserted into the hollow part of the drive element and the central part of the coil is attached above the magnet. The polarities of the adjacent magnets in the vertical direction may be different from each other.

  Further, a magnet with a hole in which a hole through which the driving element passes is formed at the center may be attached to the back side of the container, and the driving element may be passed through the hole of the magnet with the hole. You may provide the electrode which deform | transforms according to an up-down direction movement, and a connection board so that this electrode can be contacted.

  Another feature of the present invention that achieves the above-described object is that two or more first coils each having a magnetic field applied from the center to the outside and two second coils each having a magnetic field applied from the outside to the center are alternately used. Dimensionally arranged, the central axes of the first coil and the second coil are parallel to each other, the plurality of first and second coils are accommodated in a container, and each of the first and second coils Is provided with a drive element capable of projecting out of the container.

  In this feature, a plurality of first rod-like ferromagnets adsorbed on the N pole of the magnet and second rod-like ferromagnets adsorbed on the S pole of the magnet are alternately arranged in a forest, and the first rod-like strong magnetic material is arranged. The first coil is passed through the magnetic body, the second coil is passed through the second rod-shaped ferromagnetic body, and at least one of the plurality of first and second coils is energized and inserted into the energized coil. It is preferable to move the drive element along the first or second rod-shaped ferromagnetic material. A plurality of magnets are fixedly arranged in the container so that different poles are adjacent to each other, and the first and second magnets are arranged so that the winding surface is substantially parallel to the magnetic pole surface of each magnet and the magnetic pole surface of each magnet coincides with the central axis. A magnetic pole of a magnet having the same central axis as the coil that is energized with the second coil disposed, energized in at least one of the plurality of first and second coils, and the drive element attached to the energized coil You may make it move to a surface substantially perpendicularly.

  In addition, a rod-shaped ferromagnet may be provided at the center on the upper surface side of each magnet, and the rod-shaped ferromagnet may be inserted into the center of the first and second coils, and a hole through which the drive element passes is formed. You may arrange | position a perforated magnet above the 1st and 2nd coil so that the lower surface of this perforated magnet and the upper surface of a magnet may have the same polarity.

  Still another feature of the present invention that achieves the above object is that a plurality of drive elements provided movably, drive means provided in each drive element for driving the drive elements, and drive means attached to each drive element. Electrode guide, a guide plate formed with a guide hole through which the drive element can pass, and a fixed electrode fixed to the guide plate. The fixed electrode and the electrode contact are brought into contact with each other, and the electrode contact from the fixed electrode The drive means moves the drive element through the guide hole.

In this feature, the driving means includes a coil and a magnet, and the magnet includes a first magnet that applies a magnetic field from the center to the outside and a second magnet that applies a magnetic field from the outside to the center of the coil. Often, a plurality of fixed electrodes are provided for each driving element, and the plurality of fixed electrodes have different ranges in contact with the electrode contacts in the direction of movement of the driving element. It may be changed.

  According to the present invention, the multi-element drive device is configured with the directions of the magnetic field applied to the coil of the drive element being opposite to each other by the adjacent drive elements, so that it is possible to reduce variations in driving force due to the arrangement position of the drive elements. . Moreover, since the fixed electrode and the electrode contact are brought into contact with each other to supply power, wiring is not necessary, and the assemblability of the multi-element drive device is improved.

  Several embodiments of the multi-element drive device according to the present invention will be described below with reference to the drawings.

  FIG. 1 shows a longitudinal sectional view (FIG. 1A) and a top view (FIG. 1B) of the multi-element driving device 22. A large number of columnar magnets 3 are arranged in a container 2x formed in a box shape by a case 2 forming a top plate, a side yoke 7 forming a side plate, and a magnet fixing plate 1 forming a bottom plate. Are lined up. Since the magnets 3 are arranged side by side, the magnetic force at the peripheral part slightly increases from the magnetic force at the central part. The side yoke 7 is used to suppress an increase in magnetic force in the peripheral portion. Adjacent magnets 3 are fixed to the magnet fixing plate 1 with an adhesive or the like so that the directions of the magnetic poles are reversed. A ferromagnetic inner yoke 14 having a diameter slightly smaller than the diameter of the cylinder is arranged on the upper surface of the cylindrical magnet 3, and a central yoke 10 extending upward is attached to a substantially axial center portion of the inner yoke 14. It has been.

  A coil 5 surrounding the central yoke 10 and having a hole formed in the central portion thereof is disposed so as to be movable in the vertical direction. On the upper surface of the coil 5, a bowl-shaped contact portion 6a, which is a disc having a hole formed at the center, is disposed. A driving element 6 formed in a bag shape having an outer diameter larger than the hole diameter of the hook-shaped contact portion 6a is attached to the upper surface of the hook-shaped contact portion 6a with an adhesive. The hook-shaped contact portion 6 a and the drive element 6 are inserted into the central yoke 10 and moved up and down together with the coil 5. The material of the coil 5 is not attracted to the magnet 3, and the drive element 6 is made of plastic that is not attracted to the magnet 3.

  In the case 2 formed of a flat plate or a curved surface, a hole is formed corresponding to the position of the drive element 6, and the tip of the drive element 6 can jump out of the container 2x. The material of the case 2 is preferably plastic for weight reduction, and is preferably a ferromagnetic material to prevent external leakage of magnetism. When a ferromagnetic material is used, the center yoke 10 and the cover 2 are separated from each other by a predetermined distance. This is to prevent the lines of magnetic force from moving toward the cover 2 when the distance from the center yoke 10 to the cover 2 is too short, thereby reducing the driving force of the driving element 6.

  The drive element 6 is held in the container 2a when the power is stopped. The lead wire 11 of the coil is connected from the wiring hole 12 formed in the magnet fixing plate 1 to the electrode wire 15 and the ground electrode wire 16 arranged on the back side of the magnet fixing plate 1 with a space that can cope with the vertical movement of the coil 5 ( (See FIG. 3). There is no gap between the magnet 3 and the adjacent magnet 3 for wiring the electrode wire, and if the wiring is performed on the surface of the magnet 3 or the inner yoke 14, the magnetic field in the thickness portion of the wiring cannot be used for driving the coil 5. . Therefore, wiring was made through the wiring hole 12. By doing in this way, the movement resistance of the drive element 6 by the deformation | transformation of the coil conducting wire 11 can also be reduced. The electrode line 15 and the ground electrode line 16 are connected to the control device 13, and the control device 13 energizes the coil 5 to drive the drive element 6.

  If the material of the magnet fixing plate 1 is a ferromagnetic material such as iron, it is adsorbed by a magnetic force, so no adhesive is necessary. In this case, since the magnetic flux can also be focused, leakage of the magnetic force to the outside is prevented, and the driving force of the driving element 6 can be increased. Since the magnetic circuit is substantially closed between adjacent magnets, the magnet fixing plate 1 only needs to have a thickness that can concentrate the magnetic flux of one magnet. For example, when a neodymium magnet having a diameter of 7 mm and a height of 5 mm is used, the thickness of the ferromagnetic magnet fixing plate 1 can be reduced to 0.5 mm or less.

  A method for aligning the magnets 3 will be described with reference to FIG. If the upper surface of the first magnet 3a is an N pole, the upper surface of the second magnet 3b disposed adjacent to it is an S pole. In this way, the magnet poles are alternately arranged in a grid pattern. The magnet 3 is not limited to a column, but a square column or the like can be used, but a cylindrical shape has the highest magnetic efficiency. The magnets 3 and 3 are brought into close contact so that as much magnetic force as possible can be obtained in the same space. If the magnets 3 and 3 are brought into contact with each other and aligned, the magnet 3 adsorbed on the ferromagnetic magnet fixing plate 1 is unlikely to be displaced.

  If the multi-element driving device 22 is a pin display, the driving element 6 transmits information by applying force to the display element of the pin display. At that time, if the material or shape of the display element is set so that the drive element 6 becomes the display means, it is not necessary to provide a separate display means. The inner yoke 14 is attracted to the magnetic pole surface of the magnet 3. The polarity of the magnetic pole surface is opposite to that of the surface attracted to the magnet fixing plate 1. The inner yoke 14 induces the magnetic lines of force of the magnet 3 to the central yoke 10 and increases the lines of magnetic force passing through the coil 5. Thereby, the driving force of the drive element 6 increases.

  If the magnetic pole of the magnet 3 is largely covered by the inner yoke 14, many lines of magnetic force can be induced to the coil 5. However, if it is too close to the adjacent inner yoke 14 or magnet 3, the lines of magnetic force are directed toward the adjacent inner yoke 14 or magnet 3, and the driving force of the driving element 6 is reduced. The thickness of the inner yoke 14 is preferably thin in order to reduce the approach area with the adjacent inner yoke 14 and the magnet 3 and increase the lines of magnetic force induced to the coil 5. When the central yoke 10 is erected, the magnetic lines that connect the central yoke 10 vertically increase, and the magnetic lines that cross the coil 5 vertically increase. As a result, the driving force increases. At the same time, a decrease in magnetic force caused by moving away from the magnet 3 can be reduced.

  In the multi-element drive device 22 of this embodiment configured as described above, when a current is passed through the coil 5, the coil 5 moves upward along the central yoke 10. The length of the central yoke 10 should be sufficient and minimum with respect to the amount of movement of the coil 5. That is, when the coil 5 moves to the highest position, the upper surface of the coil 5 and the upper surface of the central yoke 10 are set to the same height. Further, when the magnetic force of the magnet 3 is sufficiently increased, fluctuations in the magnetic force applied to the coil 5 as the coil 5 moves can be suppressed.

  The operation principle when a current is passed through the drive element 6 is as follows. The lines of magnetic force emitted in the vertical direction from the N pole of the magnet 3 change direction in the direction of the S pole of the adjacent magnet 3 and enter the S pole of the adjacent magnet vertically. At this time, since the central axes of the magnet 3 and the coil 5 coincide with each other, lines of magnetic force are generated from the center of the coil 5 to the outside. Since the inner yoke 14 and the center yoke 10 are provided, the lines of magnetic force emitted in the vertical direction from the north pole of the magnet 3 gather at the center yoke 10. Then, it passes through the central yoke 10 and is emitted perpendicularly from the central yoke 10, goes outward from the center of the coil 5, and enters the adjacent central yoke 10.

  Similarly, magnetic field lines from the outside toward the center are generated in the adjacent coil 5 on the south pole side. When a current in a direction perpendicular to the magnetic field lines flows through the winding of the coil 5, a force in the central axis direction of the coil 5 is generated according to the Fleming left-hand rule. When the coil 5 moves in the central axis direction, the drive element 6 is driven in a direction protruding outward from the magnet fixing plate 1. If a current is passed in the reverse direction, the drive element 6 is driven in the direction returning from the magnet fixing plate 1 to the inside.

  The magnitude of the driving force F [N] is proportional to the magnetic flux density B [T], the current I [A], and the length L [m] of the conducting wire. That is, since F = B × I × L, the strength of the driving force can be controlled by the amount of current. For example, if a neodymium magnet with a diameter of 7 mm and a height of 3 mm, a coil with a wire diameter of 0.06 mm, a number of turns of 1690, an inner diameter of 2 mm, an outer diameter of 6 mm, and a height of 5 mm are used, and the central yoke length is 5 mm, multiple elements As a driving force of the driving device 22, about 0.04N is obtained at a current of 0.02A.

  In the multi-element drive device 22 shown in the present embodiment, the magnets 3 are alternately arranged so that adjacent poles are different from each other, so that the magnetic circuit is substantially closed between the adjacent magnets 3 and 3. As a result, the line of magnetic force passing through each coil 5 is one magnet 3 arranged, and is hardly affected by the number of magnets arranged. Therefore, even if the number of drive elements 6 to be arranged is different, the driving force can be made substantially constant.

  FIG. 4 shows a block diagram when the multi-element drive device 22 shown in FIG. 1 is applied to the tactile stimulus communication device 21. The tactile stimulus communication device 21 communicates with a plurality of tactile stimulus communication devices 21 by tactile stimulus. The tactile stimulation communication device 21 includes a multi-element driving device 22, a stimulation method instruction unit 23, a communication unit 24, a power source 25, and a control unit 26 that controls these.

  The multi-element drive device 22 moves the drive element 6 back and forth to give a contact object to the proximity object. The stimulation method instruction means 23 has means for detecting the position and strength touched by a finger. This detection means is, for example, a capacitance sensor or weight sensor arranged in a matrix. The detected position and strength are converted into communication data as stimulation method information. The communication unit 24 transmits the stimulation method information to the other tactile stimulus communication device 21 and receives the stimulation method information from the other tactile stimulus communication device 1. According to the received stimulation method information, the multi-element driving device 22 outputs a tactile stimulus.

  FIG. 5 is a perspective view of the tactile stimulus communication device 21 shown in FIG. The tactile stimulus communication device 21 has a size and a weight that can be placed on a palm. A stimulation method instruction means 23 is provided on one surface of the tactile stimulation communication device 21, and a multi-element drive device 22 is provided on the other surface. The tactile stimulus communication device 21 is connected to the mobile phone 27 using the connection cable 28. At that time, the communication means 24 communicates with another tactile stimulation communication device 21 using the communication function of the mobile phone 27. The communication function of the personal computer may be used by connecting to a personal computer, or the communication unit 24 may communicate with another tactile stimulation communication device 21 using radio waves or infrared rays.

  FIG. 6 is a cross-sectional view showing a state where the tactile stimulus communication device 21 is placed on the palm. The multi-element driving device 22 is placed on the hand 29 with the palm side and the stimulation method instruction means 23 on the top. The edge of the housing of the tactile stimulus communication device 21 is supported by being wrapped by hand. When the driving element 6 protrudes from the multi-element driving device 22, the driving element 6 comes into contact with the palm and gives a contact stimulus. When the drive element 6 moves backward, the contact stimulus to the palm is released.

  As shown in FIG. 7, the user traces the surface of the stimulation method instruction means 23 provided on the upper surface of the tactile stimulation communication device 21 with a finger. Then, the position and strength touched by the finger are transmitted to the tactile stimulus communication device 21 of the communication partner at a predetermined communication cycle. The multi-element drive device 22 of the tactile stimulus communication device 21 of the communication partner is activated, and the drive element 6 corresponding to the position touched by the finger protrudes toward the palm side. Therefore, if a finger is traced into a round shape, a round contact stimulus is sequentially output to the palm of the other party. As a result, it is possible to communicate characters and communicate intentions. If gently touching, a contact stimulus traced with a weak force is output, and if hit gently, a strong contact stimulus is output.

  Another embodiment of the multi-element driving apparatus is shown in FIG. 8 in a longitudinal sectional view (FIG. 8A) and a top view (FIG. 8B). This embodiment is different from the embodiment shown in FIG. 1 in that the magnet 4 is also arranged on the drive element 6 side. Further, a guide 9 that guides the vertical movement of the coil 5 is provided between the coils 5 in the gap formed by the upper and lower magnets 4, 3. A hole 4x is formed in the axial center portion of the upper magnet 4, and a rod-like drive element 6 attached to the hook-shaped contact portion 6a mounted on the coil 5 can move through the hole 4x.

  The upper magnet 4 is fixed to the cover 2, and the lower magnet 3 is fixed or attracted to the magnet fixing plate 1. The cover 2 and the magnet fixing plate 1 are fixed by a fixing screw 8 and a nut 8a at the periphery. As shown in FIG. 9, the upper magnet 4 is also opposite in polarity to the adjacent magnet 4. And the corresponding lower magnet 3 has the opposite polarity. That is, if the upper surface side of the upper magnet 4 is the S pole, the lower surface of the lower magnet 3 is also arranged to be the S pole. The upper magnet 4 and the lower magnet are arranged coaxially.

  Since the adjacent magnets 4 have different polarities, lines of magnetic force are generated from the north pole of the first magnet 4a to the south pole of the second magnet 4b adjacent to the first magnet 4a. Thereby, compared with the case where only the magnetic force line of the magnet 3 acts, the driving force of the coil 5 increases. Since the magnet 3 and the magnet 4 are opposite to each other, a repulsive force is generated. In order to solve this problem, the cover 5 and the magnet fixing plate 1 are made of a highly rigid material, and the cover and the magnet fixing plate 1 are fixed using fixing screws 8. If the cover 5 is made of a ferromagnetic material such as iron, the cover 5 has high rigidity and can prevent magnetic leakage to the outside. Further, no adhesive is required when fixing the magnet 4 to the cover 2.

  In this embodiment, a guide 9 surrounding the coil 5 is used instead of the central yoke 10 and the inner yoke 14. Thus, the coil 5 can move along the guide 9 instead of moving along the central yoke 10. The wiring hole 12 is provided on the cover 2 side and wired on the cover 2 side. Thereby, attachment of the coil 5 and the drive element 6 becomes easy, and assembly property improves.

  A method for assembling the multi-element drive device 22 will be described below. The upper magnet 4 is aligned on the back side of the cover 2, and a guide 9 is bonded to the magnet 4. Next, each drive element 6 is bonded to the coil 5 via the hook-shaped contact portion 6a. The coil lead wire 11 is passed through the wiring hole 12 and each drive element 6 is passed from the lower surface side to the center hole 4x of the upper magnet 4. The coil 5 is accommodated in the frame of the guide 9. The coil conducting wire 11 drawn out from the hole 2a of the cover 2 is connected to an electrode wire (not shown). On the other hand, the lower magnet 3 is aligned on the upper surface of the magnet fixing plate 1. The magnet fixing plate 1 and the cover 2 to which the coil 5 and the upper magnet 4 are attached are positioned so that the magnet 3 and the coil 5 face each other, and are fixed with fixing screws 8 and nuts 8a.

  According to this embodiment, since the central yoke is unnecessary, the drive element 6 can be a solid member, and the drive element 6 can be made thin. As a result, the diameter of the hole 4x of the upper magnet 4 is reduced and the magnetic force is increased. In the present embodiment, the central yoke 10 can be used to facilitate the vertical movement of the coil 5. In this case, if the length of the central yoke 10 is made longer than the distance from the lower magnet 3 to the upper magnet 4, the driving force by the magnets 3, 4 decreases, so the lower magnet 3 to the upper magnet 4 Make it shorter than the distance.

  Still another embodiment of the multi-element drive device 22 according to the present invention is shown in perspective views in FIGS. In these figures, only one of the drive elements is shown. The present embodiment is different from the above-described embodiment in that a means for preventing the coil 3 from being disconnected is provided. In order to obtain as large a driving force as possible with a small amount of current, the number of turns may be increased by making the winding of the coil 5 thinner. However, if the winding of the coil 5 is thinned, it becomes easy to break. In particular, the conductive wire 11 of the coil 5 repeats plastic deformation as the driving element 6 moves, and is easily caught between the coil 5 and the magnet 3.

  A conductor first connection plate 52 and a second connection plate 53 are attached to the upper surface of the bowl-shaped contact portion 6 a of the drive element 6. The inner conducting wire 11 a at the beginning of winding of the coil 5 is connected to the first connecting plate 52, and the outer conducting wire 11 b at the end of winding is connected to the second connecting plate 53. No margin is required for the inner coil conductor 11a and the outer coil conductor 11b. Therefore, when the conducting wires 11a and 11b are connected to the first and second connecting plates 52 and 53, the conducting wires 11a and 11b are bonded to the surfaces of the coil 5 and the bowl-shaped contact portion 6a and are covered with resin.

  First and second electrodes 50 and 51 extending in the vertical direction are arranged at two substantially symmetrical positions in the circumferential direction of the magnet 3 and the coil 5. The first and second electrodes 50 and 51 are thin flexible electrodes in which electrodes are formed on a thin plastic sheet, and the tips are rounded. The rounded tips of the first and second electrodes 50 and 51 are in contact with the first and second connection plates 50 and 51, respectively. The other end of each electrode 50, 51 extends from the wiring hole 12 to the surface side of the magnet support plate 1. When the drive element 6 protrudes, as shown in FIG. 11, the diameters of the rounded portions at the tips of the first and second electrodes 50 and B51 are reduced, and the energized state is reliably maintained even when the coil moves up and down. According to this embodiment, even if the thin conductive wire 11 is not deformed, the disconnection can be avoided only by deforming the relatively strong flexible electrode.

  Still another embodiment of the multi-element driving device 22 according to the present invention is shown in FIGS. 12 is a longitudinal sectional view (FIG. 12 (a)) and a top view (FIG. 12 (b)) of the multi-element driving device 22. FIG. FIG. 13 is a perspective view of only one drive element 6, and FIG. 14 is a top view of the drive element 6. In this embodiment, the energization path to the coil 5 is different from the embodiment shown in FIG. In the present embodiment, the assembling property is improved and the disconnection is prevented.

  As shown in FIG. 13, first and second electrode contacts 41 and 42 are formed at substantially symmetrical positions on the outer peripheral surface of the drive element 6. The inner conductor 11a at the beginning of winding of the coil 5 is connected to the first electrode contact 41, and the outer conductor 11b at the end of winding is connected to the second electrode contact 42. First and second fixed electrodes 43 and 44 are provided at positions corresponding to the circumferential positions of the first and second electrode contacts 41 and 42 on the edge of the drive element hole 2 a of the cover 2. The first fixed electrode 41 is brought into contact with the first electrode contact 41, and the second fixed electrode 42 is brought into contact with the second electrode contact 44.

  The first and second fixed electrodes 43 and 44 are pressed against the driving element 6 so that the fixed electrodes 43 and 44 are in stable contact with the electrode contacts 41 and 42. For example, first and second fixed electrodes 43 and 44 are formed on a plastic sheet, and the plastic sheet is passed through the drive element hole 2a. The tip of the plastic sheet is bent and fixed on the back side of the cover 2. The fixed electrodes 43 and 44 on the curved surface of the plastic sheet are brought into contact with the electrode contacts 41 and 42. Thereby, a pressing force is applied to the drive element 6 by the elasticity of the curved surface of the plastic sheet. The axial lengths (vertical lengths) of the electrode contacts 41 and 42 are sufficiently long so that the electrode contacts 41 and 42 are always in contact with the fixed electrodes 43 and 44 even when the drive element 6 moves back and forth.

  Depending on the polarity of the magnet 3 that each coil 5 faces, the direction of the current that causes the coil 5 to advance and retreat is different. Therefore, the first and second electrode contacts 41 and 42 to be brought into contact with and the first and second fixed electrodes 43 and 44. Is changed according to the polarity of the magnet 3. For example, the first fixed electrode 43 is a drive voltage, and the second fixed electrode 44 is a ground voltage. When a first electrode contact 41 of a certain coil 5 is brought into contact with the first fixed electrode 43 and a second electrode contact 42 is brought into contact with the second fixed electrode 44, the coil 5 faces the magnetic pole opposite to the magnetic pole facing the coil 5. The first electrode contact 41 of the coil 5 to be contacted is brought into contact with the second fixed electrode 44, and the second electrode contact 42 is brought into contact with the first fixed electrode 43.

  If the electrode contacts 41 and 42 and the fixed electrodes 43 and 44 are arranged in this way, the drive element 6 protrudes when a positive drive voltage is applied to the ground voltage, and the drive element 6 is applied when a negative drive voltage is applied. fall back. In all the drive elements 6, the direction of the drive voltage and the direction of protrusion and retraction can be made equal, and the control of the drive elements 6 becomes easy. A guide groove 45 is formed in the drive element 6 so that the combination of the electrode contacts 41 and 42 and the fixed electrodes 43 and 44 does not change due to rotation of the drive element 6. As shown in FIG. 14, a guide claw 46 is formed on the cover 2, and the guide claw 46 is engaged with the guide groove 45 to prevent the drive element 6 from rotating.

  The pressing force applied to the drive element 6 by the first and second fixed electrodes 43 and 44 is small enough not to hinder the forward / backward movement of the drive element 6 and is larger than the force that moves the drive element 6 by gravity. When energization of the coil 5 is stopped, the drive element 6 is fixed at the stop position. Therefore, if power is supplied only when moving to the target position, and if a power failure occurs after moving to the target position, power is saved. Thereby, even if it applies to a portable apparatus, operating power is securable.

  Still another embodiment of the multi-element drive device 22 according to the present invention will be described with reference to FIGS. In FIG. 15, only one drive element is shown in a perspective view. FIG. 16 is a top view of FIG. In the present embodiment, unlike the above embodiments, the advance / retreat position of the drive element 6, that is, the vertical position, is made variable stepwise. One of the electrode contacts 41 and 42 of the embodiment shown in FIG. 12 is replaced with a deformed electrode contact 54 that becomes wider as it goes to the tip of the driving element 6 in the axial direction. The other electrode contact is the same as that shown in FIG. 12, but this electrode contact is used as the ground electrode contact 55.

  As shown in FIG. 16, the cover 2 is formed with three types of fixed electrodes, the upper position fixed electrode 47, the middle position fixed electrode 48, and the lower position fixed electrode 49, radially around the drive element hole 2a. ing. The upper position fixed electrode 47 is always provided at a position in contact with the deformed electrode contact 54 while the drive element 6 moves from the most retracted position to the most protruded position. The middle position fixed electrode 48 is provided at a position in contact with the deformed electrode contact 54 while the driving element 6 moves from the most retracted position to the middle protruding position. The lower position fixed electrode 49 is provided at a position in contact with the deformed electrode contact 54 while the drive element 6 moves from the most retracted position to a position slightly protruding. The second fixed electrode 44 is brought into contact with the ground electrode contact 55.

  According to the present embodiment, if the electrode to be energized is selected from the upper position fixed electrode 47, the middle position fixed electrode 48, and the lower position fixed electrode 49, the advance / retreat position of the drive element 6 is set to the maximum projecting position, It can be changed in three stages: a protruding position and a small protruding position. In this embodiment, the height position is changed in three steps, but the number is not limited to this number, and the number of fixed electrodes and the kind of contact position can be changed to any number of steps. it can. When the multi-element driving device shown in this embodiment is applied to a pin display, not only the contour of the shape but also the surface irregularities can be displayed.

  Still another embodiment of the present invention will be described with reference to FIGS. FIG. 17 is a longitudinal sectional view of the multi-element driving device 22, and FIG. 18 is a perspective view showing the arrangement of the magnets 3a. In this embodiment, the arrangement of the multi-element driving device 22 shown in FIG. 1 and the magnet 3a is different. That is, in the embodiment of FIG. 1, the magnets 3a are closely arranged, and the coils 5 are provided corresponding to each of them. However, in this embodiment, the arrangement of the coils 5 is the same as that of the embodiment of FIG. Are arranged every other.

  Since the coil 5 mounted on the magnet 3a and the coil 5 attached to the central yoke 10b without the magnet 3a are alternately arranged, the central yoke 10b is fixed to the ferromagnetic magnet fixing plate 1 and the back surface of the cover 2 It extends to near. A flange 56 made of a material that is not attracted to the magnet is attached at the height of the magnet 3a of the center yoke 10b. Thereby, the movable range of the coil 5 can be made substantially the same with or without the magnet 3a. The magnet 3a has the same polarity as shown in FIG. That is, the upper surface of the magnet 3a is the S pole and the lower surface is the N pole.

  According to the present embodiment, it is possible to generate the same level of driving force with a smaller number of magnets than in the multi-element driving device 22 shown in FIG. Therefore, cost reduction and weight reduction are possible. Further, the driving force can be increased by changing the ratio of the magnet 3a to the space and increasing the magnetic pole area without changing the distance between the central yoke 10 where the magnet 3a is present and the long central yoke 10b where the magnet 3a is not present.

In the present embodiment, the magnetic force applied to the coil 5 is different between the central yoke 10 where the magnet 3a is present and the central yoke 10b where the magnet 3a is not present. That is, the magnetic force is smaller in the central yoke 10b without the magnet 3a, and the magnetic force is further reduced in the outermost peripheral portion of the central yoke 10b without the magnet 3a. Therefore, in order to obtain the same driving force, the number of turns of the coil 5 is changed or the value of the current supplied to the coil 5 is changed. At this time, a decrease in the magnetic force of the central yoke 10b in the outermost peripheral portion is suppressed without using the side yoke. Note that when changing the number of turns of the coil, the height of the coil may be increased and the position of the rod 56 may be lowered. In the multi-element drive device 22 of the present embodiment, the magnetic force is increased depending on the advance / retreat position of the coil 5. Since it changes slightly, it is preferable to use it for a device that makes the advance / retreat position clearer. Moreover, since the adjacent magnets 3a face the same direction, a repulsive force is generated. The arrangement interval of the magnets 3a is sufficiently increased so that the magnets 3a are not displaced from the magnet fixing plate 1 by the generated repulsive force. Since the magnet fixing plate 1 is a space other than a portion where the magnet 3a and the center yoke 10b are in contact with each other, the weight can be reduced by forming a hole. Alternatively, the ferromagnetic piece obtained by subdividing the magnet fixing plate 1 may be fixed to a lightweight plastic plate, and the magnet 3a and the central yoke 10b may be combined with each ferromagnetic piece.

  Still another embodiment of the multi-element drive device 22 according to the present invention will be described with reference to FIGS. FIG. 19 is a longitudinal sectional view of a multi-element driving device. 20, 22, and 23 are layout views of magnets used in the multi-element drive device, and FIG. 21 is a perspective view of FIG. 20. In this embodiment, a rectangular parallelepiped magnet 57 is used unlike the embodiment shown in FIG.

  Surface yokes 58 are attracted to the left and right side surfaces of the rectangular parallelepiped magnet 5 7. The central yoke 10 is disposed on the upper surface of the front yoke 58 and in the middle in the front-rear direction. The front-rear and left-right distances between the center yokes 10 and 10 are equal. The central yoke 10 is passed through the coil 5 having a hole formed in the center. The diameter of the coil 5 is slightly shorter than the length of the magnet 3 in the left-right direction. Between the adjacent magnets 3 and 3, a spacer 59 having a height lower than that of the magnet 3 and used for positioning the magnet 3 is disposed via the surface yoke 58.

  The magnet fixing plate 1 is nonmagnetic. As shown in FIG. 20, the left and right surfaces of adjacent magnets 57 have different polarities. As shown in FIG. 21, the magnets 57 are arranged in the same direction and shifted in a checkered pattern. 22 and 23 are modified examples in which the arrangement of the magnets 57 is changed. In FIG. 22, in the arrangement of the magnets 57, the polarities are the same in the left-right direction and the opposite polarities in the front-rear direction (up-down direction in the figure). Two kinds of magnets 57a and 57b are arranged so that In FIG. 23, the direction of the magnetic force of the magnet 57 and the arrangement of the magnetic poles are changed. In this embodiment and any of the modifications, if the magnetic pole area of the magnet 57 and the magnetic pole direction length are equal to the magnet 3 of the embodiment shown in FIG. 1, the number of magnets is the same as that of the embodiment of FIG. Power can be obtained, and cost reduction and weight reduction of the multi-element drive device can be realized. Further, if the central yoke 10 is disposed on the upper surface of the surface yoke 58 at both ends in the front-rear direction, and the magnets 57 are disposed so that the front-rear and left-right distances between the central yokes 10, 10 are equal, the cost can be reduced and the weight can be reduced. Can be realized.

It is the longitudinal cross-sectional view (a) and top view (b) of one Example of the multiple element drive device based on this invention. It is a figure explaining arrangement | positioning of the magnet used for the multiple element drive device shown in FIG. It is a figure explaining the wiring in the multiple element drive device shown in FIG. 1 is a block diagram of an embodiment of a tactile stimulus communication device using a multi-element drive device according to the present invention. It is a perspective view of the tactile stimulus communication apparatus shown in FIG. It is a longitudinal cross-sectional view of a part of the tactile stimulus communication apparatus shown in FIG. FIG. 5 is a perspective view of a part of the tactile stimulus communication apparatus shown in FIG. 4. It is the longitudinal cross-sectional view (a) and top view (b) of the other Example of the multiple element drive device based on this invention. It is a figure explaining arrangement | positioning of the magnet used for the multiple element drive device shown in FIG. It is a perspective view of the further another Example of the multiple element drive device which concerns on this invention. It is a perspective view which shows the state at the time of operation | movement of the multiple element drive device shown in FIG. It is the longitudinal cross-sectional view (a) and top view (b) of other Example of the multiple element drive device based on this invention. It is a figure explaining the electric current supply method in the multiple element drive device shown in FIG. It is a figure explaining the electric current supply method in the multiple element drive device shown in FIG. It is a perspective view of the further another Example of the multiple element drive device which concerns on this invention. It is a figure explaining the electric current supply method in the multiple element drive device shown in FIG. It is a longitudinal cross-sectional view of the further another Example of the multiple element drive device based on this invention. It is a figure explaining arrangement | positioning of the magnet used for the multiple element drive device shown in FIG. It is a longitudinal cross-sectional view of the further another Example of the multiple element drive device based on this invention. It is a figure explaining arrangement | positioning of the magnet used for the multiple element drive device shown in FIG. It is a perspective view of the magnet shown in FIG. FIG. 20 is a top view of another example of a magnet arrangement used in the multi-element drive device shown in FIG. 19. FIG. 20 is a top view of still another example of the magnet arrangement used in the multiple element drive device shown in FIG. 19.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Magnet fixing plate, 2 ... Cover (guide plate), 2a ... Drive element hole, 2x ... Container, 3 ... Magnet, 3a ... Magnet, 3b ... Magnet, 4 ... Magnet with hole, 4a ... Magnet with hole, 4b ... Magnet with hole, 5 ... coil, 6 ... drive element, 6a ... hook contact portion, 7 ... side yoke, 8 ... fixing screw, 8a ... nut, 9 ... guide, 10 ... center yoke, 10b ... long center yoke, 11 DESCRIPTION OF SYMBOLS ... Coil lead, 11a ... Inner coil lead, 11b ... Outer coil lead, 12 ... Wiring hole, 13 ... Control device, 14 ... Inner yoke, 15 ... Electrode wire, 16 ... Ground electrode wire, 21 ... Tactile stimulation communication device, 22 ... Multi-element drive device, 23 ... Stimulation method instruction means, 24 ... Power supply, 25 ... Control means, 26 ... Communication means, 27 ... Mobile phone, 28 ... Connection cable, 29 ... Palm, 30 ... Finger, 41 ... First Electrode contact, 42 ... second electrode contact, 4 DESCRIPTION OF SYMBOLS 1st fixed electrode, 44 ... 2nd fixed electrode, 45 ... Guide groove, 46 ... Guide claw, 47 ... Fixed electrode for upper positions, 48 ... Fixed electrode for middle positions, 49 ... Fixed electrode for lower positions, 50 ... 1st flexible electrode, 51 ... 2nd flexible electrode, 52 ... 1st connection board, 53 ... 2nd connection board, 54 ... Deformed electrode contact, 55 ... Ground electrode contact, 56 ... 鍔, 57 ... Magnet , 57a ... magnet, 57b ... magnet, 58 ... surface yoke, 59 ... spacer.

Claims (13)

  A plurality of magnets are fixedly arranged in a two-dimensional manner in a container, a coil is arranged so as to be movable above each magnet, and a driving element extending in the vertical direction is arranged on the upper surface of the coil and substantially at the center. A multi-element driving device, wherein a hole through which the driving element can pass is formed on the upper surface of the container.   2. The multi-element drive device according to claim 1, wherein the coil is housed in the container, the drive element is fixed to an upper surface of the coil, and adjacent magnets have different vertical polarities.   The coil is housed in the container, the drive element is formed of a hollow member fixed to the upper surface of the coil, and a central yoke inserted into the hollow part of the drive element and the central part of the coil is disposed on the magnet. The multi-element drive device according to claim 1, wherein the upper and lower magnets are attached in an upward direction and have different polarities in the vertical direction.   The holed magnet in which a hole through which the driving element passes is formed at the center is attached to the back side of the container, and the driving element is penetrated through the hole of the holed magnet. The multi-element drive device described.   5. The plurality of electrodes according to claim 1, wherein an electrode that is deformed in accordance with the vertical movement of the coil and a connection plate that can come into contact with the electrode are provided in the vicinity of the coil. Element drive device   A plurality of first coils having a magnetic field applied from the center to the outside and a plurality of second coils having a magnetic field applied from the outside to the center are alternately arranged two-dimensionally. The central axes of the coils are parallel to each other, the plurality of first and second coils are accommodated in a container, and a drive element capable of projecting out of the container is provided in each of the first and second coils. A multi-element drive device characterized by that.   A plurality of first rod-shaped ferromagnets adsorbed on the N pole of the magnet and second rod-shaped ferromagnets adsorbed on the S pole of the magnet are alternately arranged in a forest, and the first rod-shaped ferromagnet is placed on the first rod-shaped ferromagnet. The first coil is inserted into the energized coil by energizing at least one of the plurality of first and second coils through the second coil through the second rod-shaped ferromagnetic body. The multi-element driving apparatus according to claim 6, wherein the driving element is moved along a second rod-shaped ferromagnetic body.   A plurality of magnets are fixedly arranged so that different poles are adjacent to each other in the container, and the first and the first and A magnetic pole of a magnet having the same central axis as the coil that is energized with the second coil disposed, energized in at least one of the plurality of first and second coils, and the drive element attached to the energized coil The multi-element driving apparatus according to claim 6, wherein the multi-element driving apparatus is moved substantially perpendicular to the surface.   The multi-element according to claim 8, wherein a rod-shaped ferromagnetic body is provided at a center portion on an upper surface side of each magnet, and the rod-shaped ferromagnetic body is inserted into the center portions of the first and second coils. Drive device.   A perforated magnet in which a hole for passing the driving element is formed is disposed above the first and second coils so that the bottom surface of the perforated magnet and the top surface of the magnet have the same polarity. The multi-element driving apparatus according to claim 7 or 9.   A plurality of drive elements provided movably, drive means provided in each drive element for driving the drive elements, electrode contacts of the drive means attached to the drive elements, and guides through which the drive elements can pass A guide plate in which a hole is formed; and a fixed electrode fixed to the guide plate. The fixed electrode and the electrode contact are brought into contact with each other, and the driving means is energized from the fixed electrode to the electrode contact. A multi-element driving apparatus, wherein the driving element is moved through the guide hole.   The driving means includes a coil and a magnet, and the magnet includes a first magnet that applies a magnetic field from the center to the outside, and a second magnet that applies a magnetic field from the outside to the center of the coil. The multi-element drive device according to claim 11.   A plurality of the fixed electrodes are provided for each driving element, and the plurality of fixed electrodes have different ranges in contact with the electrode contacts in the moving direction of the driving elements. The multi-element drive device according to claim 11, wherein the multi-element drive device is changed.

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