Vibration generation device, vibration reduction device, and electronic device

Abstract

Vibration generating device, vibration damping device, and electronic device. The magnitude of the generated vibration can be easily adjusted. The vibration generating device has: a base that transmits a vibration to an object; an arm that is provided to the base in a manner that can swing about a rotational axis; at least one driving portion that has a magnet and a coil that is arranged in non-contact opposition to the magnet, swings the arm, one of the magnet and the coil is arranged at a position of the arm that is separate from the rotational axis, the arm includes: an arrangement portion that is provided at the position of the arm that is separate from the rotational axis; and a weight application portion that is detachably attached to the arrangement portion.

Description

Technical Field

[0001] This invention relates to vibration generating devices, vibration damping devices, and electronic devices. Background Technology

[0002] Previously, for example as shown in Patent Document 1, vibration actuators that realize the vibration function of electronic devices are known.

[0003] Patent Document 1 describes a vibration actuator comprising a fixed body and a movable body. The movable body is supported on the fixed body by means of a shaft portion provided on the fixed body as a fulcrum for oscillation. The movable body is movably supported on the fixed body by a magnetic spring generated by the attraction of a magnet. The movable body has an iron core as a magnetic body and a coil wound on the iron core. Current of different frequencies flows through the coil, allowing it to move around a shaft portion that passes through a through hole in the iron core. A flexible substrate is provided at one end of the iron core to supply power to the coil.

[0004] The stationary body is composed of a base plate and a housing. The stationary body has a magnet and a buffer. The magnet, in cooperation with the coil of the movable body, enables the movable body to move. The free end of the vibrating movable body contacts the buffer. Thus, the vibration of the movable body can be transmitted to the housing of the vibration actuator, and the buffer can generate a large vibration.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-109165

[0006] However, in the vibration actuator described in Patent Document 1, there is a problem that the magnitude of the generated vibration is difficult to adjust.

[0007] In detail, in the aforementioned vibration actuator, the movable body oscillates around its axis by attracting or repelling a magnet fixed to a stationary body via a coil wound around it, thereby generating vibration. However, even if one wants to adjust the weight of the movable body to adjust the magnitude of the vibration generated by the vibration actuator, the weight of the movable body cannot be easily changed because of the coil wound around it.

[0008] Therefore, a structure that can easily adjust the magnitude of the generated vibrations is desired. Summary of the Invention

[0009] The vibration generating device of the first aspect of the present invention includes: a base for transmitting vibration to an object; an arm disposed on the base in a manner capable of swinging about a rotation axis; at least one drive unit having a magnet and a coil disposed opposite to the magnet in a non-contact manner to swing the arm, one of the magnet and the coil being disposed at a position of the arm separated from the rotation axis, the arm including: a mounting part disposed at the position of the arm separated from the rotation axis; and a weighting part detachably mounted on the mounting part.

[0010] The vibration generating device of the second aspect of the present invention comprises: a base that transmits vibration to an object; an arm detachably mounted on the base and capable of swinging about a rotation axis; at least one drive unit having a magnet and a coil disposed opposite to the magnet in a non-contact manner to swing the arm, wherein one of the magnet and the coil is disposed in a position separate from the rotation axis, and the arm is selected from a variety of arms with different rotational torques generated by the swinging of the arm and is mounted on the base.

[0011] The vibration damping device of the third aspect of the present invention includes: a vibration generating device of the first aspect or the second aspect described above; a detection unit that detects vibration; and an operation control unit that causes the vibration generating device to generate a vibration that is opposite in phase to the vibration detected by the detection unit.

[0012] The electronic device of the fourth aspect of the present invention includes the vibration damping device of the third aspect described above. Attached Figure Description

[0013] Figure 1 This is a perspective view showing the projector of the first embodiment.

[0014] Figure 2 This is a perspective view showing the main body of the vibration damping device according to the first embodiment.

[0015] Figure 3 This is a top view showing the main body of the device after the cover component has been removed according to the first embodiment.

[0016] Figure 4 This is a perspective view showing the vibration generating device of the first embodiment.

[0017] Figure 5 This is a top view showing the vibration generating device of the first embodiment.

[0018] Figure 6 This is a perspective view showing the oscillator of the first embodiment.

[0019] Figure 7 This is a side view showing the arm of the first embodiment.

[0020] Figure 8 This is a perspective view showing the rotating shaft portion of the first embodiment.

[0021] Figure 9 This is an exploded perspective view showing the arm of the first embodiment.

[0022] Figure 10 This is an exploded perspective view showing the arm of the first embodiment.

[0023] Figure 11 This is a perspective view showing the drive unit of the first embodiment.

[0024] Figure 12 This is a cross-sectional view showing the drive unit of the first embodiment.

[0025] Figure 13 This is a diagram showing the coil of the first embodiment.

[0026] Figure 14 This is a diagram showing a variation of the drive unit in the first embodiment.

[0027] Figure 15 This is a diagram showing a deformation of the vibration generating device according to the first embodiment.

[0028] Figure 16 This is a side view showing an example of the arm included in the vibration generating device of the second embodiment.

[0029] Figure 17 This is a side view showing an example of the arm included in the vibration generating device of the second embodiment.

[0030] Figure 18 This is a side view showing an example of the arm included in the vibration generating device of the second embodiment.

[0031] Figure 19 This is a top view showing the vibration generating device of the third embodiment.

[0032] Figure 20 This is a top view showing the vibration generating device of the fourth embodiment.

[0033] Figure 21 This is a top view showing a modified vibration generating device according to the fourth embodiment.

[0034] Label Explanation

[0035] 1 Projector (electronic device); 2 Vibration damping device; 3A, 3C, 3E, 3F Vibration generating devices; 4A, 4C, 4E, 4F Bases; 5A, 5C, 5E, 5F Oscillators; 51, 51C, 51D, 51E Arms; 51E1 Arm body; 51E5 Weight-bearing part; 52 Arm body; 521 Connecting part; 5211 Hole part; 522 Extension part; 523 Enlargement part; 524, 525 Configuration part; 526 First side part; 5261 Mounting part; 527 Second side part; 5271 Mounting part; 528 Third side part; 5281 Mounting part; 53 Weighting section; 54 Weighting component; 55 Rotating shaft section; 551, 551L, 551R Support section; 552 Assembly section; 6A Drive section; 61 First drive section; 62 Second drive section; 63 Third drive section; 64 Fourth drive section; 65 Fifth drive section; 66 Sixth drive section; 7A, 7B Magnets; 7A1 First magnet component; 7A2 Second magnet component; 8A Coil; 8A1 First extension; 8A2 Second extension; 91 Plate component; 92 Holding component; 921 First plate-shaped part; 922 Second plate-shaped part; 93 Terminal section; S1 Screw. Detailed Implementation

[0036] [First Implementation]

[0037] Hereinafter, the first embodiment of the present invention will be described with reference to the accompanying drawings.

[0038] [General Structure of a Projector]

[0039] Figure 1 This is a perspective view showing the projector 1 of this embodiment.

[0040] The projector 1 in this embodiment is an electronic device that modulates light emitted from a light source to form image light corresponding to image information, and then amplifies and projects the formed image light onto the projection surface. For example... Figure 1 As shown, the projector 1 includes an outer housing 11, a projection optics device 12, and a vibration damping device 2. Furthermore, although not shown in the figures, the projector 1 includes a light source, a light modulation device, a power supply device, a cooling device, and a control device.

[0041] The light modulation device modulates the light emitted from the light source to form image light corresponding to the image information.

[0042] The power supply unit supplies power to the electronic components of the projector 1.

[0043] The cooling device cools the object located inside the projector 1.

[0044] The control device controls the operation of projector 1.

[0045] [Structure of the outer casing]

[0046] The outer casing 11 constitutes the outer casing of the projector 1, and internally houses the aforementioned light source, light modulation device, power supply device, cooling device, and control device. The outer casing 11 is formed in a generally rectangular parallelepiped shape.

[0047] The outer housing 11 has a connection terminal 112 on its surface 111 in the projection direction of the image from the projection optical device 12. The connection terminal 112 is connected to the cable 28 of the vibration damping device 2, which will be described later. The connection terminal 112 is, for example, a USB (Universal Serial Bus) terminal, which supplies power to the vibration damping device 2.

[0048] [Structure of the projection optical device]

[0049] The projection optics 12 projects the image light generated by the aforementioned light modulation device onto the projection surface. In this embodiment, the projection optics 12 is mounted and detachably on the outer housing 11. That is, the projection optics 12 is replaceable.

[0050] Figure 1 The projection optical device 12 shown bends the direction of travel of the image light incident on it in two stages, projecting the image light in a direction opposite to the incident direction of the image light relative to the projection optical device 12. That is, when viewed from a direction orthogonal to the direction connecting the projection direction surface 111 and the surface opposite to the projection direction surface 111, the projection optical device 12 is configured as an approximately U-shaped device rotated 90° counterclockwise.

[0051] In addition to the lens barrel 121, although the illustration is omitted, the projection optical device 12 also includes multiple lenses and multiple reflective components disposed within the lens barrel 121.

[0052] [Structure of vibration damping device]

[0053] The vibration damping device 2 is installed on the object to be damped and reduces the vibration of the object by generating a vibration that is opposite in phase to the vibration acting on the object. In this embodiment, the vibration damping device 2 is provided on the lens barrel 121 to reduce the vibration acting on the lens barrel 121.

[0054] In this case, when vibrations are transmitted from the outside to the projector 1 or when vibrations occur due to internal factors such as the fan of the projector 1, the projection optical device 12, which is provided to protrude outward from the outer casing 11, is prone to vibrate more significantly than the outer casing 11. Thus, when the projection optical device 12 vibrates, the image projected onto the projection surface by the projection optical device 12 shakes significantly.

[0055] Because of this problem, in this embodiment, by providing the vibration damping device 2 to the projection optical device 12, the vibration of the projection optical device 12 is reduced, thereby suppressing image shaking.

[0056] The structure of vibration damping device 2 will be described in detail below.

[0057] The vibration damping device 2 includes a main body 21, a cable 28, and a fastener 29.

[0058] Cable 28 extends from device body 21. Cable 28 is connected to connection terminal 112, supplying power from connection terminal 112 to device body 21.

[0059] The fastener 29 secures the main body 21 of the device to the object being damped. In this embodiment, the fastener 29 is made of a strap and is wound around the outer peripheral surface of the lens barrel 121 of the projection optical device 12, which is the object being damped. However, it is not limited to this; the fastener 29 can be any fastening component such as a screw, as long as it can secure the housing 22 to the object being damped.

[0060] Figure 2 This is a perspective view showing the main body 21 of the device. Figure 3 This is a top view of the main body 21 of the device after the cover component 24 has been removed.

[0061] The main body 21 of the device generates a vibration that is opposite in phase to the vibration of the lens barrel 121, thereby reducing the vibration of the lens barrel 121. In addition to... Figure 2 In addition to the housing 22 and the detection unit 25 shown, as Figure 3 As shown, the main body 21 of the device also includes an action control unit 26 and a vibration generating device 3A.

[0062] The housing 22 houses the detection unit 25, the motion control unit 26, and the vibration generating device 3A. (Example) Figure 2 As shown, the housing 22 has a frame 23 and a cover component 24, which are combined to form a generally rectangular shape.

[0063] In addition, the cover component 24 is formed into a rectangular plate and is detachably mounted on the first surface 23A of the frame 23.

[0064] like Figure 2 and Figure 3 As shown, frame 23 is formed as a rectangular frame with a first face 23A, a second face 23B, a third face 23C, a fourth face 23D, a fifth face 23E, and a sixth face 23F. The first face 23A and the second face 23B are faces opposite to each other. The third face 23C and the fourth face 23D are faces opposite to each other, and the fifth face 23E and the sixth face 23F are faces opposite to each other.

[0065] like Figure 2As shown, the frame 23 has a fastener mounting part 231, a sensor mounting part 232, and a terminal part 233.

[0066] like Figure 2 As shown, the fastener mounting portion 231 is a rod-shaped portion provided in the frame 23 on the third surface 23C side and the fourth surface 23D side. The end of the fastener 29 is mounted on each fastener mounting portion 231.

[0067] The sensor mounting section 232 is disposed on the third surface 23C. The detection section 25 is mounted on the sensor mounting section 232.

[0068] Terminal portion 233 is located approximately at the center of the sixth surface 23F. Cable 28 is connected to terminal portion 233, and power is supplied from connection terminal 112 to terminal portion 233 via cable 28.

[0069] The detection unit 25 detects vibrations acting on the vibration damping device 2. The detection unit 25 includes a printed circuit board 251 and a sensor (not shown) disposed on the printed circuit board 251. The printed circuit board 251 is mounted on a sensor mounting section 232 and outputs the vibration direction and amplitude detected by the sensor to the motion control section 26. Examples of sensors included in the detection unit 25 include accelerometers and gyroscopes.

[0070] like Figure 3 As shown, the frame 23 also has a configuration section 234 and a mounting section 235.

[0071] The configuration section 234 and the mounting section 235 are covered by the cover member 24 mounted on the first surface 23A. In other words, the configuration section 234 and the mounting section 235 are exposed by removing the cover member 24 from the frame 23.

[0072] The motion control unit 26 is disposed in the configuration unit 234.

[0073] Vibration generating device 3A is installed in mounting section 235.

[0074] The motion control unit 26 is a printed circuit board on which multiple circuit elements are mounted, and is disposed in the placement unit 234. The motion control unit 26 controls the operation of the vibration damping device 2. Specifically, the motion control unit 26 activates the vibration generating device 3A based on the detection results of the detection unit 25. In detail, the motion control unit 26 supplies drive power to the vibration generating device 3A and activates the vibration generating device 3A in a manner that causes the vibration generating device 3A to generate vibrations with an opposite phase to the vibrations detected by the detection unit 25.

[0075] [Structure of the vibration generating device]

[0076] Figure 4 This is a perspective view showing the vibration generating device 3A. Figure 5This is a top view showing the vibration generating device 3A.

[0077] Vibration generating device 3A is mounted on mounting part 235, which is located within frame 23. Under the control of motion control unit 26, vibration generating device 3A generates vibrations that reduce the vibration of mirror barrel 121, the object to be damped. Figure 4 and Figure 5 As shown, the vibration generating device 3A has a base 4A, an oscillator 5A and at least one drive unit 6A.

[0078] In the following explanation, the three mutually orthogonal directions are designated as +X, +Y, and +Z. The +X direction is along the rotation axis Rx of the oscillator 5A, from the third surface 23C towards the fourth surface 23D. The +Y direction is perpendicular to the base 4A, from the second surface 23B towards the first surface 23A. The +Z direction is the direction in which the oscillator 5A extends from the rotation axis Rx when viewed from the +Y direction, from the sixth surface 23F towards the fifth surface 23E. Furthermore, although the diagram is omitted, the opposite direction of the +X direction is designated as -X, the opposite direction of the +Y direction as -Y, and the opposite direction of the +Z direction as -Z.

[0079] [Structure of the base]

[0080] The base 4A is a plate-shaped component formed as a flat plate. The base 4A transmits the vibration generated by the vibration generating device 3A to the object on which the base 4A is mounted, namely the frame 23. The base 4A supports the vibrator 5A and the drive unit 6A, and is mounted on... Figure 3 The mounting portion 235 is shown. The base 4A has a mounting portion 41, fixing portions 42 to 44, and a retraction portion 45.

[0081] Mounting part 41 is the part that mounts the oscillator 5A on the base 4A. Mounting part 41 is disposed at the end of the base 4A in the -Z direction, and mounting part 41 is equipped with a rotating shaft part 55 that forms the rotating shaft Rx of the oscillator 5A.

[0082] like Figure 4 and Figure 5 As shown, fixing parts 42 to 44 are respectively portions in the base 4A that can fix the retaining member 92 of the drive unit 6A. Fixing part 42 is provided at the end of the base 4A in the +Z direction. Fixing part 43 is provided at the end of the base 4A in the +X direction, and fixing part 44 is provided at the end of the base 4A in the -X direction.

[0083] That is, the fixing part 43 is the portion of the mounting part 41 that extends from its end in the +X direction along the rotation axis Rx toward the oscillator 5A in the +Z direction. The fixing part 44 is the portion of the mounting part 41 that extends from its end in the -X direction along the rotation axis Rx toward the oscillator 5A in the +Z direction. Furthermore, the fixing part 42 is the portion connecting the ends of the fixing parts 43 and 44 on the side opposite to the mounting part 41.

[0084] A retraction portion 45 is provided between the mounting portion 41 and the fixing portion 42 in the +Z direction. Specifically, the retraction portion 45 is provided in the portion surrounded by the mounting portion 41 and the fixing portions 42-44. The retraction portion 45 is used to prevent the +Z direction portion of the oscillator 5A and the magnet 7A (described later) from contacting the base 4A when the oscillator 5A oscillates around the rotation axis Rx. In this embodiment, the retraction portion 45 is an opening extending through the base 4A in the +Y direction. However, it is not limited to this and may also be a recessed portion opening in the opposite direction to the direction opposite to the oscillator 5A. Specifically, the retraction portion 45 may also be a recessed portion opening in the +Y or -Y direction. Even when the retraction portion 45 is a recessed portion, it is possible to construct the retraction portion 45 in such a way that the +Z direction portion of the oscillator 5A and the magnet 7A do not contact the base 4A.

[0085] [Structure of the oscillator]

[0086] Figure 6 This is a three-dimensional view showing the oscillator 5A. Figure 7 This is a side view of arm 51 viewed from the +X direction.

[0087] The oscillator 5A is supported on the base 4A in a manner that allows it to oscillate around the rotation axis Rx, extending in the +Z direction from the rotation axis Rx. The oscillator 5A oscillates around the rotation axis Rx via the drive unit 6A, thereby generating vibration. Figures 4-7 As shown, the oscillator 5A has an arm 51 and a rotating shaft 55.

[0088] [Structure of the rotating shaft]

[0089] Figure 8 This is a perspective view showing the rotating shaft portion 55.

[0090] First, the rotating shaft 55 will be explained.

[0091] The rotating shaft 55 supports the Z-direction end of the arm 51 so that it can rotate, and is mounted on the mounting portion 41 of the base 4A. The rotating shaft 55 has a pair of support portions 551 and mounting portions 552.

[0092] A pair of support portions 551 are positioned to clamp the arm 51 in the +X direction, supporting the arm 51 so that it can rotate about the rotation axis Rx. Figure 8 As shown, a pair of support portions 551 each have a pin 5511 forming the rotation axis Rx of the oscillator 5A. The pin 5511 of the support portion 551L, located in the -X direction, protrudes from the support portion 551L in the +X direction, while the pin 5511 of the support portion 551R, located in the +X direction, protrudes from the support portion 551R in the -X direction. Each pin 5511 is inserted into the arm 51, thereby supporting the arm 51 so that it can rotate about the rotation axis Rx along the +X direction. Such a pair of support portions 551 are provided at the end of the assembly portion 552 in the -Z direction.

[0093] The assembly part 552 is mounted to the mounting part 41 in a detachable manner by means of screws SC. Therefore, by removing the assembly part 552 from the mounting part 41, the arm 51 can be removed from the base 4A and the vibrator 5A can be removed.

[0094] [Arm Structure]

[0095] The arm 51 is rotatably mounted about the rotation axis Rx via a rotating shaft 55 mounted on the base 4A. Figure 6 and Figure 7 As shown, the arm 51 includes an arm body 52 and a weight-bearing part 53 mounted on the arm body 52.

[0096] like Figure 6 As shown, when viewed from the +Y direction, the arm body 52 is roughly T-shaped, with the end in the +Z direction larger than the end in the -Z direction. Figure 6 and Figure 7 As shown, the arm body 52 has a connecting portion 521, an extension portion 522, an enlargement portion 523, a configuration portion 524, 525, a first side portion 526, a second side portion 527, and a third side portion 528.

[0097] The connecting portion 521 is a part of the arm body 52 supported by a pair of support portions 551. In this embodiment, the connecting portion 521 is provided at the end of the arm body 52 in the -Z direction. Holes 5211 are provided on the surfaces of the connecting portion 521 in the +X direction and the surface of the connecting portion 521 in the -X direction, respectively. A [missing information - likely a typo, should be inserted here] is disposed inside each hole 5211. Figure 7 The bearing BR is shown. Furthermore, each rotating shaft portion 55 has a pin 5511 inserted into the interior of the bearing BR via a washer (not shown), thereby supporting the arm 51 on the rotating shaft portion 55, which is mounted on the base 4A.

[0098] The extension 522 extends from the connecting portion 521 to the enlarged portion 523. The dimension of the extension 522 along the +X direction is smaller than that of the enlarged portion 523 along the +X direction, and the dimension of the extension 522 along the +X direction is the same within the range from the connecting portion 521 to the enlarged portion 523. A through hole 5221 is provided in the extension 522 to achieve weight reduction of the arm 51 and to further bring the center of gravity of the arm 51 closer to the +Z direction. However, it is not limited to this; a recess may be provided instead of the through hole 5221, or the through hole 5221 may not be provided.

[0099] The enlargement portion 523 is the +Z direction portion of the arm body 52. ​​The dimension of the enlargement portion 523 along the +X direction is larger than the dimension of the connecting portion 521 along the +X direction. The center of gravity of the arm 51 having such an enlargement portion 523 is located closer to the +Z direction than the midpoint between the rotation axis Rx and the end of the arm 51 in the +Z direction. That is, the center of gravity of the arm 51 is closer to the first side portion 526 than the midpoint between the rotation axis Rx and the end of the arm 51 on the first side portion 526 side, regardless of the structure and arrangement of the weight-bearing portion 53.

[0100] Figure 9 and Figure 10 This is an exploded perspective view showing arm 51. In detail, Figure 9 This is an exploded stereoscopic view of arm 51 as viewed from the +Y direction. Figure 10 This is an exploded stereoscopic view of arm 51 as viewed from the -Y direction.

[0101] like Figure 9 As shown, the configuration portion 524 is provided on the surface of the enlarged portion 523 in the +Y direction. In detail, the configuration portion 524 is a recessed portion that is recessed from the surface of the enlarged portion 523 in the +Y direction in the -Y direction, and is formed into a roughly square shape when viewed from the +Y direction.

[0102] like Figure 10 As shown, the configuration portion 525 is provided on the surface of the enlarged portion 523 in the -Y direction. More specifically, the configuration portion 525 is a recessed portion that extends from the -Y direction surface of the enlarged portion 523 into the +Y direction, and is formed into a roughly square shape when viewed from the -Y direction.

[0103] like Figure 6 , Figure 7 , Figure 9 and Figure 10 As shown, at least one of the configuration sections 524 and 525 is configured with a weighting part 53. That is, the configuration sections 524 and 525 are located at a position separated from the rotation axis Rx on the side facing the first side 526, and are portions capable of supporting the weighting part 53.

[0104] The weight-applying section 53 is composed of at least one weight-applying component 54. That is, the weight and center of gravity of the weight-applying section 53 are adjusted according to the number and arrangement of the weight-applying components 54 constituting the weight-applying section 53.

[0105] The weighting component 54 is disposed in one of the configuration portions 524 and 525 along the rotation axis Rx. The weighting component 54 has a through hole 541 extending through the weighting component 54 along the +Y direction. The weighting component 54 is fixed to one of the configuration portions 524 and 525 by a screw S1 inserted through the through hole 541.

[0106] Viewed from a position opposite to the configuration section 524, three weight-applying members 54 can be arranged along the +Z direction, orthogonal to the rotation axis Rx, and further arranged in the +Y direction relative to the weight-applying members 54 configured in the configuration section 524. That is, the weight-applying members 54 are configured to be stacked in the configuration sections 524 and 525. Specifically, the weight-applying members 54 are formed into a generally cuboid shape having a major axis along the +X direction. When multiple weight-applying members 54 are stacked in the configuration section 524 along the +Y direction, screws S1 are fixed to the configuration section 524 with the through holes 541 of each weight-applying member 54 inserted through them. The same applies to the configuration section 525. With this structure, in addition to adjusting the number and arrangement of the weight-applying members 54 provided on the arm 51, the weight and center of gravity position of the arm 51 on which the weight-applying members 53 are provided can also be adjusted.

[0107] like Figures 7-10 As shown, the first side portion 526 is the end portion of the arm 51 located in the +Z direction, which is the extension direction of the arm 51, in the direction intersecting the rotation axis Rx, opposite to the center of the arm 51 and opposite to the rotation axis Rx. That is, the first side portion 526 is the front end portion of the arm 51 extending from the rotation axis Rx in the +Z direction, facing the +Z direction, and is the free end of the arm 51. The first side portion 526 has a mounting portion 5261 recessed in the -Z direction. The mounting portion 5261 mounts the plate member 91 constituting the first drive unit 61.

[0108] The second side portion 527 and the third side portion 528 are ends that intersect in the +X direction, which is parallel to the rotation axis Rx, and are opposite to each other. That is, the second side portion 527 and the third side portion 528 are the side portions in the +X and -X directions of the enlarged portion 523, respectively. In detail, the second side portion 527 is the side portion of the enlarged portion 523 facing the +X direction, and the third side portion 528 is the side portion of the enlarged portion 523 facing the -X direction.

[0109] The second side portion 527 has a mounting portion 5271 recessed in the -X direction. The mounting portion 5271 mounts the plate member 91 of the second drive unit 62.

[0110] The third side portion 528 has a mounting portion 5281 recessed in the +X direction. The mounting portion 5281 mounts the plate member 91 of the third drive unit 63.

[0111] [Structure of the drive unit]

[0112] Figure 11 This is a perspective view showing the drive unit 6A. Figure 12 This is a cross-sectional view showing the drive unit 6A.

[0113] The drive unit 6A causes the arm 51 of the oscillator 5A, which is supported on the base 4A, to swing about the rotation axis Rx. At least one drive unit 6A is provided on the vibration generating device 3A. In other words, the vibration generating device 3A has at least one drive unit 6A.

[0114] like Figure 11 and Figure 12 As shown, the drive unit 6A includes a magnet 7A, a coil 8A, a plate member 91, a holding member 92, and a terminal part 93. Furthermore, the drive unit 6A has a control unit (not shown).

[0115] [Structure of a magnet]

[0116] Magnet 7A is positioned on arm 51, separated from the rotation axis Rx, via plate component 91. Magnet 7A causes arm 51 to oscillate around the rotation axis Rx by attracting or repelling the magnetic force generated by coil 8A. Magnet 7A is composed of a first magnet component 7A1 and a second magnet component 7A2.

[0117] The first magnet component 7A1 and the second magnet component 7A2 are each formed into a generally cuboid shape with a major axis. The dimensions of the first magnet component 7A1 along its major axis and the dimensions of the second magnet component 7A2 along their major axes are approximately the same as the dimensions of the coil 8A along the same direction.

[0118] like Figure 12 As shown, the surface 7A11 of the first magnet component 7A1 opposite to the coil 8A is opposite to the first extension 8A1 of the coil 8A (described later). In this embodiment, the magnetic pole of the surface 7A11 is the S pole.

[0119] The second magnet component 7A2 is disposed separately from the first magnet component 7A1 in the -Y direction. Specifically, the second magnet component 7A2 is separated from the first magnet component 7A1 along the -Y direction from the first extension 8A1 of the coil 8A toward the second extension 8A2 (described later). For example... Figure 12As shown, the surface 7A21 of the second magnet component 7A2 opposite to the coil 8A is opposite to the second extension 8A2 of the coil 8A. In this embodiment, the magnetic pole of surface 7A21 is the N pole. That is, the magnetic pole of the surface 7A11 of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic pole of the surface 7A21 of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0120] [Structure of plate components]

[0121] The plate member 91 is formed in the shape of a flat plate. The plate member 91 supports the magnet 7A and is mounted on the arm 51 of the oscillator 5A. Thus, the magnet 7A is mounted on the oscillator 5A. The plate member 91 functions as a yoke for the magnet 7A. That is, the plate member 91 is a magnet-side yoke positioned opposite the coil 8A to the magnet 7A.

[0122] [Structure of a coil]

[0123] Figure 13 This is a diagram showing the coil 8A that constitutes the drive unit 6A.

[0124] The coil 8A is disposed outside the structure of the oscillator 5A. In this embodiment, the coil 8A is fixed to the base 4A by a retaining member 92. The coil 8A is arranged opposite to the magnet 7A in a non-contact manner, generating a magnetic field acting on the magnet 7A.

[0125] like Figure 13 As shown, coil 8A is an air-core coil constructed by winding a wire into a track-like or elliptical shape with a major axis on a plane, as viewed from magnet 7A. Therefore, when viewed from magnet 7A, the dimension of coil 8A along its major axis is larger than the dimension of coil 8A along its minor axis, which is orthogonal to the major axis.

[0126] Such a coil 8A has a first extension 8A1 and a second extension 8A2.

[0127] The first extension 8A1 is a portion that extends in a straight line along the long axis of the coil 8A. The first extension 8A1 is positioned in the +Y direction relative to the hollow portion SP of the coil 8A.

[0128] The second extension 8A2 is disposed on the opposite side of the first extension 8A1, separated from the hollow portion SP of the coil 8A. That is, the second extension 8A2 is disposed in the -Y direction relative to the first extension 8A1. The second extension 8A2 extends linearly along the long axis of the coil 8A. The dimension of the second extension 8A2 along the long axis of the coil 8A is approximately the same as the dimension of the first extension 8A1 along the long axis of the coil 8A. When current flows through the control unit into the coil 8A, the direction of the current in the second extension 8A2 is opposite to the direction of the current in the first extension 8A1.

[0129] In this embodiment, as described above, coil 8A is an air-core coil without an iron core, but it can also be a coil with an iron core between the first extension 8A1 and the second extension 8A2.

[0130] [Maintain the structure of the component]

[0131] The retaining member 92 is fixed to one of the fixing portions 42-44 while retaining the coil 8A and the terminal portion 93. The retaining member 92 has a first plate-shaped portion 921 orthogonal to the +Y direction and a second plate-shaped portion 922 extending from the first plate-shaped portion 921 in the +Y direction. The retaining member 92 is formed of a strongly magnetic material and is roughly L-shaped when viewed from the side.

[0132] The -Y direction surface of the first plate-shaped portion 921 contacts one of the fixing portions 42 to 44. The terminal portion 93 is mounted on the +Y direction surface of the first plate-shaped portion 921.

[0133] In the second plate-shaped portion 922, a coil 8A is mounted on a surface extending from the second plate-shaped portion 922 in the opposite direction to the first plate-shaped portion 921. That is, the coil 8A is mounted on the surface of the second plate-shaped portion 922 opposite to the magnet 7A. The holding member 92 is formed of a strongly magnetic material; therefore, the second plate-shaped portion 922 functions as a yoke for controlling the direction of the magnetic field generated by the coil 8A. In other words, the vibration generating device 3A includes a holding member 92, which has a second plate-shaped portion 922 positioned on the opposite side of the magnet 7A relative to the coil 8A, serving as a coil-side yoke. The holding member 92 is a holding member for the strongly magnetic material that holds the coil 8A.

[0134] [Structure of the terminal section]

[0135] Terminal 93 is electrically connected to the operation control unit 26 of the vibration damping device 2, supplying current from the operation control unit 26 to the control unit (not shown). The control unit energizes coil 8A, causing coil 8A to generate a magnetic field, thereby applying a driving force to arm 51, which is equipped with magnet 7A, causing arm 51 to swing. Specifically, the control unit allows alternating current to flow through coil 8A, alternatingly reversing the direction of the magnetic field generated by coil 8A, thereby causing oscillator 5A to swing around the rotation axis Rx. That is, the control unit alternately switches the direction of the current flowing through coil 8A.

[0136] When an alternating current flows through coil 8A, a magnetic field is generated from one of the first extension 8A1 and the second extension 8A2 toward the other extension. That is, one extension is the N pole and the other extension is the S pole. Furthermore, the control unit alternately switches the magnetic poles of the first extension 8A1 and the second extension 8A2 by allowing an alternating current of a predetermined frequency to flow through coil 8A.

[0137] As described above, the magnetic poles of the surface 7A11 of the first magnet member 7A1, which is non-contactly opposite to the first extension 8A1, are different from the magnetic poles of the surface 7A21 of the second magnet member 7A2, which is non-contactly opposite to the second extension 8A2.

[0138] Therefore, when alternating current flows through coil 8A, arm 51, on which magnet 7A is mounted via plate member 91, swings about the rotation axis Rx according to the frequency of the alternating current. The frequency of the alternating current flowing through coil 8A is set by motion control unit 26 based on vibration detected by detection unit 25 provided in vibration damping device 2. As a result, vibration generating device 3A can generate vibration with the opposite phase to the vibration propagating to projection optical device 12, thereby reducing the vibration of projection optical device 12.

[0139] [Detailed structural configuration of the first drive unit, the second drive unit, and the third drive unit]

[0140] As described above, the vibration generating device 3A includes at least one drive unit 6A. In this embodiment, the vibration generating device 3A includes multiple drive units 6A, including a first drive unit 61, a second drive unit 62, and a third drive unit 63.

[0141] In other words, the first drive unit 61, the second drive unit 62, and the third drive unit 63 are each one of the multiple drive units 6A included in the vibration generating device 3A. The first drive unit 61 is disposed in the +Z direction relative to the arm 51, the second drive unit 62 is disposed in the +X direction relative to the arm 51, and the third drive unit 63 is disposed in the -X direction relative to the arm 51.

[0142] Specifically, in addition to the magnet 7A, coil 8A, plate member 91, holding member 92, and terminal member 93, the first drive unit 61 also includes a control unit (not shown). The magnet 7A of the first drive unit 61 corresponds to the first magnet, and the coil 8A of the first drive unit 61 corresponds to the first coil.

[0143] In the first drive unit 61, the plate member 91 is mounted on the mounting part 5261, which is located on the first side part 526 of the arm body 52.

[0144] The first magnet component 7A1 and the second magnet component 7A2 constituting the magnet 7A are fixed to the surface of the plate component 91 in the +Z direction with the long axis of each magnet component 7A1 and 7A2 along the +X direction. That is, the magnet 7A of the first drive unit 61 is disposed separately from the rotation axis Rx on the first side surface 526.

[0145] The first plate-shaped portion 921 of the retaining component 92 is fixed to the fixing portion 42 of the base 4A.

[0146] The coil 8A is mounted on the -Z direction surface of the second plate-shaped portion 922 of the retaining member 92, opposite to the magnet 7A, in a non-contact manner. Specifically, the coil 8A is configured such that the first extension 8A1 and the first magnet member 7A1 are opposite to each other in the +Z direction in a non-contact manner, and the second extension 8A2 and the second magnet member 7A2 are opposite to each other in the +Z direction in a non-contact manner.

[0147] As described above, the magnetic poles of the surface of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0148] In addition to the magnet 7A, coil 8A, plate member 91, holding member 92, and terminal member 93, the second drive unit 62 also includes a control unit (not shown). The magnet 7A of the second drive unit 62 is equivalent to the second magnet, and the coil 8A of the second drive unit 62 is equivalent to the second coil.

[0149] In the second drive unit 62, the plate member 91 is mounted on the mounting part 5271, which is located on the second side part 527 of the arm 51.

[0150] The first magnet component 7A1 and the second magnet component 7A2 constituting the magnet 7A are fixed to the surface of the plate component 91 in the +X direction with the long axis of each magnet component 7A1 and 7A2 along the +Z direction. That is, the magnet 7A of the second drive unit 62 is disposed separately from the rotation axis Rx on the second side surface 527.

[0151] The first plate-shaped portion 921 of the retaining component 92 is fixed to the fixing portion 43 of the base 4A.

[0152] The coil 8A is mounted on the -X direction surface of the second plate-shaped portion 922 of the retaining member 92, opposite to the magnet 7A, in a non-contact manner. Specifically, the coil 8A is configured such that the first extension 8A1 and the first magnet member 7A1 are opposite to each other in the +X direction in a non-contact manner, and the second extension 8A2 and the second magnet member 7A2 are opposite to each other in the +X direction in a non-contact manner.

[0153] As described above, the magnetic poles of the surface of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0154] In addition to the magnet 7A, coil 8A, plate member 91, holding member 92, and terminal member 93, the third drive unit 63 also includes a control unit (not shown). The magnet 7A of the third drive unit 63 is equivalent to the third magnet, and the coil 8A of the third drive unit 63 is equivalent to the third coil.

[0155] In the third drive unit 63, the plate member 91 is mounted on the mounting part 5281, which is located on the third side part 528 of the arm 51.

[0156] The first magnet component 7A1 and the second magnet component 7A2 constituting the magnet 7A are fixed to the surface of the plate component 91 in the -X direction with the long axis of each magnet component 7A1 and 7A2 along the +Z direction. That is, the magnet 7A of the third drive unit 63 is disposed separately from the rotation axis Rx on the third side surface 528.

[0157] The first plate-shaped portion 921 of the retaining component 92 is fixed to the fixing portion 44 of the base 4A.

[0158] The coil 8A is mounted on the +X direction surface of the second plate-shaped portion 922 of the retaining member 92, opposite to the magnet 7A, in a non-contact manner. Specifically, the coil 8A is configured such that the first extension 8A1 and the first magnet member 7A1 are opposite to each other in the +X direction in a non-contact manner, and the second extension 8A2 and the second magnet member 7A2 are opposite to each other in the +X direction in a non-contact manner.

[0159] As described above, the magnetic poles of the surface of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0160] [Synchronization of various drive units]

[0161] The control units of each drive unit 61 to 63 generate a magnetic field in the coil 8A by causing an alternating current to flow through the corresponding coil 8A. At this time, each control unit causes an alternating current of the same frequency and phase to flow through each coil 8A, so that the first extension 8A1 of the coil 8A in each drive unit 61 to 63 becomes the same magnetic pole, and the second extension 8A2 of the coil 8A in each drive unit 61 to 63 becomes the same magnetic pole.

[0162] Therefore, it is possible to prevent one of the drive units 61 to 63 from hindering the oscillation of the oscillator 5A based on the other drive units. Furthermore, since the oscillator 5A can be oscillated by the driving force of each drive unit 61 to 63, the rotational torque of the oscillator 5A during oscillation can be increased. Additionally, multiple drive units 61 to 63 can share a single control unit.

[0163] [Effects of the first embodiment]

[0164] The projector 1 described above in this embodiment achieves the following effects.

[0165] Projector 1 is equivalent to an electronic device. Projector 1 includes a vibration damping device 2. Vibration damping device 2 includes a vibration generating device 3A, a detection unit 25, and an action control unit 26. The detection unit 25 detects the vibration of the projection optical device 12, which is the object. The action control unit 26 causes the vibration generating device 3A to generate a vibration with the opposite phase to the vibration detected by the detection unit 25.

[0166] The vibration generating device 3A includes a base 4A, an arm 51, and at least one drive unit 6A. The base 4A transmits vibrations to the object. The arm 51 is mounted on the base 4A in a manner that allows it to swing about a rotation axis Rx.

[0167] In this embodiment, multiple drive units 6A are provided in the vibration generating device 3A. The drive units 6A cause the arm 51 to swing. The drive unit 6A has a magnet 7A and a coil 8A disposed opposite to the magnet 7A without contact. One of the magnet 7A and the coil 8A, namely the magnet 7A, is disposed at a position of the arm 51 that is separated from the rotation axis Rx.

[0168] The arm 51 includes mounting sections 524 and 525 and a weight-bearing section 53. The mounting sections 524 and 525 are located on the arm 51 at a position separate from the rotation axis Rx. The weight-bearing section 53 is detachably mounted to the mounting sections 524 and 525.

[0169] Based on this structure, by changing the structure of the weight-bearing part 53 installed in the configuration parts 524 and 525, the weight and center of gravity of the arm 51 can be easily changed. Therefore, the magnitude of the vibration generated by the vibration generating device 3A through the swinging of the arm 51 can be easily adjusted.

[0170] Furthermore, the vibration generating device 3A can generate a vibration that is opposite in phase to the vibration detected by the detection unit 25, thereby reducing the vibration of electronic devices that are intended to be installed with the vibration damping device 2.

[0171] In the vibration generating device 3A, the weighting unit 53 is composed of at least one weighting component 54. The configuration units 524 and 525 are configured to be able to configure multiple weighting components 54.

[0172] With this structure, by adjusting the number and position of the weighting members 54 arranged in the configuration sections 524 and 525, the weight and shape of the weighting member 53 can be easily adjusted, and consequently, the weight and center of gravity of the arm 51 can be easily adjusted. Therefore, the magnitude of the vibration generated by the vibration generating device 3A through the swinging of the arm 51 can be easily adjusted.

[0173] In the vibration generating device 3A, the weighting component 54 is configured to be stacked in the mounting sections 524 and 525.

[0174] With this structure, the weighting components 54 disposed in the configuration section 524 or configuration section 525 can be further stacked. This allows for the placement of more weighting components 54 in the configuration sections 524 and 525, thus not only preventing the arm 51 from becoming too large, but also increasing the weight and shape of the weighting component 53. Therefore, the weight and center of gravity of the arm 51 can be increased, allowing for more precise adjustment of the vibration generated by the vibration generating device 3A.

[0175] In the vibration generating device 3A, the weighting component 54 can also be formed in a generally rectangular shape.

[0176] Based on this structure, the weight-bearing components 54 can be easily stacked and configured.

[0177] In the vibration generating device 3A, the weight-applying members 54 are arranged along the rotation axis Rx. When viewed from a position opposite to the arrangement section 524, the arrangement section 524 can arrange multiple weight-applying members 54 in a direction orthogonal to the rotation axis Rx. Similarly, when viewed from a position opposite to the arrangement section 525, the arrangement section 525 can arrange multiple weight-applying members 54 in a direction orthogonal to the rotation axis Rx.

[0178] Here, when viewed from the position opposite to the configuration unit 524, the center of gravity position of the arm 51 does not change significantly whether the weight-applying member 54 is arranged in a direction orthogonal to the rotation axis Rx, whether the configuration unit 524 has one weight-applying member 54, or whether the configuration unit 524 has two weight-applying members 54. The same applies when the weight-applying member 54 is arranged in the configuration unit 525 in a direction orthogonal to the rotation axis Rx.

[0179] In contrast, when the weight-applying member 54 is positioned along the rotation axis Rx as viewed from a position opposite to the configuration unit 524, weight can be easily applied to the end of the arm 51 on the side opposite to the rotation axis Rx, i.e., the end on the first side portion 526. Therefore, whether the configuration unit 524 has one weight-applying member 54 or two weight-applying members 54, the center of gravity position of the arm 51 can be varied considerably. Similarly, whether the configuration unit 525 has one weight-applying member 54 or two weight-applying members 54, the center of gravity position of the arm 51 can be varied considerably. Thus, the center of gravity position of the arm 51 can be easily adjusted.

[0180] In the vibration generating device 3A, the arm 51 is detachably mounted to the base 4A. Specifically, the arm 51 is mounted to the base 4A via a rotating shaft 55, which is detachable from the base 4A.

[0181] With this structure, the weight-applying part 53 can be arranged in the arrangement portions 524 and 525 of the arm 51 when the arm 51 is removed from the base 4A. Therefore, the arrangement of the weight-applying part 53 relative to the arm 51 can be easily implemented.

[0182] [First variation of the first embodiment]

[0183] In the aforementioned vibration generating device 3A, the magnet 7A includes a first magnet component 7A1 and a second magnet component 7A2 separated from each other in the -Y direction from the first extension 8A1 toward the second extension 8A2. However, it is not limited to this, the magnet provided on the oscillator 5A may also be composed of a single magnet opposite to the first extension 8A1 and the second extension 8A2.

[0184] Figure 14 This is a cross-sectional view showing a first modified example of the drive unit 6A. In detail, Figure 14 This is a cross-sectional view showing a modified magnet 7B, which is a magnet 7A that is a drive unit 6A.

[0185] For example, the drive unit 6A used in the vibration generating device 3A can also be adopted. Figure 14 The magnet 7B shown is used instead of the magnet 7A. That is, at least one of the drive units, namely the first drive unit 61, the second drive unit 62 and the third drive unit 63, may also have a magnet 7B instead of the magnet 7A.

[0186] Unlike magnet 7A, which has a first magnet component 7A1 and a second magnet component 7A2, magnet 7B is composed of a single magnet component.

[0187] Magnet 7B is formed in the shape of a cuboid having a long axis that is substantially parallel to the long axis of coil 8A, and is fixed to plate member 91 in a non-contact manner opposite to coil 8A. The dimension of magnet 7B along its long axis is substantially the same as the dimension of coil 8A along its long axis, and the dimension of magnet 7B along the +Y direction orthogonal to the long axis is substantially the same as the dimension of coil 8A along the +Y direction.

[0188] Magnet 7B has a portion 7B1 opposite to the first extension 8A1 of coil 8A and a portion 7B2 opposite to the second extension 8A2 of coil 8A, with portions 7B1 and 7B2 connected. The magnetic poles of the surface of portion 7B1 opposite to the first extension 8A1 and the magnetic poles of the surface of portion 7B2 opposite to the second extension 8A2 are different. For example, the magnetic pole of the surface of portion 7B1 opposite to the first extension 8A1 is the S pole, and the magnetic pole of the surface of portion 7B2 opposite to the second extension 8A2 is the N pole.

[0189] The vibration generating device 3A, which has a drive unit 6A equipped with such a magnet 7B, can also achieve the same effect as described above.

[0190] [Second variation of the first embodiment]

[0191] In the aforementioned vibration generating device 3A, the drive unit 6A, which includes a first drive unit 61, a second drive unit 62, and a third drive unit 63, has a magnet 7A and a coil 8A. That is, the drive unit 6A has a coil 8A composed of a single air-core coil. However, it is not limited to this; a single drive unit may also have multiple coils.

[0192] For example, a drive unit may also have multiple coils arranged side by side along the long axis of the coils and at least one magnet arranged corresponding to each of the multiple coils.

[0193] In this case, at least one magnet, like the magnet 7A described above, may also be one of multiple magnets having a first magnet component and a second magnet component respectively provided corresponding to multiple coils. In this case, each first magnet component may be non-contactingly opposite to the first extension of the corresponding coil among the multiple coils, and each second magnet component may be non-contactingly opposite to the second extension of the corresponding coil among the multiple coils.

[0194] Alternatively, at least one magnet may also have a first magnet component configured across a first extension of multiple coils and non-contactly opposite each first extension, and a second magnet component configured across a second extension of multiple coils and non-contactly opposite each second extension.

[0195] Alternatively, at least one magnet may be a magnet component having a portion that is non-contactly opposite to the first extension of a corresponding coil among the plurality of coils and a portion that is non-contactly opposite to the second extension of a corresponding coil among the plurality of coils, similar to magnet 7B described above.

[0196] Alternatively, at least one magnet may be a magnet component having a portion of first extensions configured across multiple coils and non-contactly opposite each of the first extensions, and a portion of second extensions of corresponding coils among the multiple coils.

[0197] [Third variation of the first embodiment]

[0198] In the vibration generating device 3A described above, the arm 51 is supported by a rotating shaft portion 55 so that it can swing about a rotating shaft Rx. The rotating shaft portion 55 is mounted on a mounting portion 41 located at the -Z-direction end of the base 4A. In other words, the rotating shaft portion 55, which supports the arm 51 so that it can swing about a rotating shaft Rx, is mounted on a mounting portion 41 located at the -Z-direction end of the base 4A. However, it is not limited to this; the mounting portion 41 may also be located at a position on the base 4A closer to the +Z-direction end than the -Z-direction end.

[0199] Figure 15This is a top view showing a third modified example of the vibration generating device 3A. In detail, Figure 15 This is a top view showing the deformed base 4C and oscillator 5C, which are the base 4A and oscillator 5A of the vibration generating device 3A.

[0200] For example, vibration generating device 3A can also be used Figure 15 The base 4C and oscillator 5C shown replace the base 4A and oscillator 5A. The position of the mounting part 41 of the mounting rotation shaft 55 of the base 4C is different from that of the base 4A. The oscillator 5C has an arm 51C with a different dimension between the connecting part 521 and the enlarged part 523 than the arm 51, and the orientation of the rotation shaft 55 is different.

[0201] Specifically, in the base 4C, the mounting portion 41 is positioned in the +Z direction relative to the -Z direction end of the base 4C. That is, the mounting portion 41 is located between the -Z direction end of the base 4C and the retractable portion 45.

[0202] Furthermore, depending on the position of the mounting portion 41 of the base 4C, the dimension between the connecting portion 521 and the enlarged portion 523 of the arm 51C is smaller than the dimension between the connecting portion 521 and the enlarged portion 523 of the arm 51. That is, the arm 51C does not have an extension portion 522 connecting the connecting portion 521 and the enlarged portion 523, but is composed of the enlarged portion 523 and a pair of support portions 551 of the rotating shaft portion 55 connected to the enlarged portion 523. Moreover, the -Z direction end of the enlarged portion 523 is adjacent to the pair of support portions 551. In addition, in the oscillator 5C, the rotating shaft portion 55 is mounted on the mounting portion 41 in a state of rotating 180° around the axis in the +Y direction. Specifically, in the rotating shaft portion 55 of the oscillator 5C, a pair of support portions 551 are provided at the +Z direction end of the mounting portion 552.

[0203] According to the vibration generating device 3A that adopts such a base 4C and oscillator 5C, in addition to achieving the same effect as described above, the vibration generating device 3A can also be configured to be smaller.

[0204] [Fourth variation of the first embodiment]

[0205] The vibration generating devices 3A and 3C described above include a first drive unit 61, a second drive unit 62, and a third drive unit 63 as drive units 6A. However, they are not limited to this; the vibration generating devices 3A and 3C may also have a structure that includes one or both of the first drive unit 61, the second drive unit 62, and the third drive unit 63. For example, the vibration generating devices 3A and 3C may only have the first drive unit 61, or they may only have at least one of the two drive units, the second drive unit 62 and the third drive unit 63.

[0206] [Second Implementation]

[0207] Next, the second embodiment of the present invention will be described.

[0208] The projector of this embodiment has the same structure as the projector 1 of the first embodiment, but the structure of the arm of the vibration generating device is different. Furthermore, in the following description, parts that are the same or substantially the same as those already described are marked with the same reference numerals and their descriptions are omitted.

[0209] Figures 16-18 This is a side view showing an example of the arm 51D included in the vibration generating device 3A of this embodiment. That is, Figures 16-18 This is a side view showing arms 51D1, 51D2, and 51D3, which are arms 51D.

[0210] The projector and vibration damping device of this embodiment, except for having a vibration generating device 3A with arm 51D instead of arm 51, have the same structure and function as the projector 1 and vibration damping device 2 of the first embodiment. That is, the oscillator 5A of the vibration generating device 3A of this embodiment has Figures 16-18 One example of multiple arms 51D is shown to replace arm 51.

[0211] The arm 51D has a structure in which the arm body 52 and the weight-applying part 53 are integrally formed. Specifically, the arm 51D is selected and applied from multiple arms 51D with different positions, shapes and weights of the weight-applying part 53.

[0212] In the multi-arm 51D Figure 16 The arm 51D1 shown is formed in the same way as the arm 51 in which a weight-bearing member 54 is arranged in the +Z direction of the configuration section 524.

[0213] In the multi-arm 51D Figure 17 The arm 51D2 shown is formed in the same way as the arm 51 in which two weight-bearing members 54 are arranged in the +Z direction at the position of the configuration section 524.

[0214] In the multi-arm 51D Figure 18 The arm 51D3 shown is formed in the same way as the arm 51 in which a weighting member 54 is arranged in the +Z direction of the configuration section 524 and another weighting member 54 is arranged in the +Z direction of the configuration section 525.

[0215] The portion of arm 51D (51D1 to 51D3) that corresponds to the weight-bearing member 54 is the weight-bearing part 53 of the arm body 52 of arm 51D1 to 51D3, which is located at a position separate from the rotation axis Rx. Moreover, at least one of the weight and shape of the weight-bearing part 53 in each arm 51D (51D1 to 51D3) is different.

[0216] When such an arm 51D is used in the vibration generating device 3A, the torque generated by the swinging of the arm 51D varies. That is, in this embodiment, the vibration generating device 3A selects and installs a variety of arms 51D with different rotational torques generated during swinging onto the base 4A. As a result, the magnitude of the vibration generated by the vibration generating device 3A can be adjusted, and the versatility of the vibration generating device 3A and even the vibration damping device 2 can be expanded.

[0217] [Effects of the second implementation method]

[0218] In addition to having the same effect as the projector 1 in the first embodiment, the projector described above also has the following effects.

[0219] The vibration generating device 3A of this embodiment includes a base 4A, an arm 51D, and at least one drive unit 6A. The base 4A transmits vibration to an object. The arm 51D is detachably mounted to the base 4A and can swing about a rotation axis Rx. The drive unit 6A has a magnet 7A and a coil 8A disposed opposite to the magnet 7A without contact. As described above, the magnet 7A, which is one of the magnet 7A and the coil 8A, is disposed at a position of the arm 51D separated from the rotation axis Rx. The arm 51D is selected from a variety of arms 51D with different rotational torques generated by the swinging of the arm 51D and is mounted on the base 4A.

[0220] With this structure, the magnitude of the vibration of the vibration generating device 3A caused by the swinging of the arm 51D can be adjusted by changing the arm 51D mounted on the base 4A. Therefore, the magnitude of the vibration generated by the vibration generating device 3A can be easily adjusted.

[0221] In the vibration generating device 3A of this embodiment, the arm 51D has a connecting portion 521 supported by a rotating shaft portion 55 connected to the base 4A, which is capable of swinging about the rotating shaft Rx, and a weight-applying portion 53 disposed at a position separate from the rotating shaft Rx. For various arms 51D, at least one of the weight of the weight-applying portion 53 and the shape of the weight-applying portion 53 differs.

[0222] Based on this structure, by changing the arm 51D mounted on the base 4A, the rotational torque generated by the swing of the arm 51D can be adjusted, and the magnitude of the vibration generated by the vibration generating device 3A can be reliably adjusted.

[0223] [Third Implementation]

[0224] Next, the third embodiment of the present invention will be described.

[0225] The projector of this embodiment has the same structure as the projector 1 of the first embodiment, but the difference is that the vibration generating device has a drive unit whose rotation axis relative to the arm is arranged on the side opposite to the first drive unit, the second drive unit, and the third drive unit. Furthermore, in the following description, parts that are the same as or substantially the same as those already described are marked with the same reference numerals and their descriptions are omitted.

[0226] Figure 19 This is a top view of the vibration generating device 3E of the vibration damping device provided with the projector in this embodiment, viewed from the +Y direction.

[0227] The projector in this embodiment, in addition to having Figure 19 The vibration generating device 3E shown replaces the vibration generating device 3A and has the same structure and function as the projector 1 of the first embodiment. That is, the vibration damping device of this embodiment, except that the vibration generating device 3E replaces the vibration generating device 3A, has the same structure and function as the vibration damping device 2 of the first embodiment.

[0228] The vibration generating device 3E has a base 4E and an oscillator 5E replacing the base 4A and oscillator 5A, and also has a fourth drive unit 64, a fifth drive unit 65, and a sixth drive unit 66. Otherwise, it has the same structure and function as the vibration generating device 3A of the first embodiment. That is, the vibration generating device 3E has a base 4E, an oscillator 5E, and a plurality of drive units 6A. In addition to the first drive unit 61, the second drive unit 62, and the third drive unit 63, the plurality of drive units 6A also include the fourth drive unit 64, the fifth drive unit 65, and the sixth drive unit 66.

[0229] [Structure of the base]

[0230] The base 4E supports the oscillator 5E. The retaining components 92 of each drive unit 61 to 66 are fixed on the base 4E.

[0231] In addition to having fixing parts 46, 47, 48 and retraction parts 49, base 4E has the same structure and function as base 4A. That is, base 4E has mounting parts 41, fixing parts 42-44, 46-48 and retraction parts 45, 49.

[0232] Furthermore, in the base 4E, the mounting part 41 is provided at the center of the base 4E in the +Z direction, such that the oscillator 5E is sandwiched along the +X direction.

[0233] The fixing parts 46 to 48 are disposed on the opposite side of the fixing parts 42 to 44, across the mounting part 41. That is, the fixing parts 46 to 48 are disposed in the -Z direction relative to the mounting part 41.

[0234] Among the fixing parts 46 to 48, the fixing part 46, which is provided in the -Z direction, is the part that fixes the retaining member 92 of the fourth drive part 64. The fixing part 47, which is provided in the +X direction, is the part that fixes the retaining member 92 of the fifth drive part 65, and the fixing part 48, which is provided in the -X direction, is the part that fixes the retaining member 92 of the sixth drive part 66.

[0235] That is, the fixing part 47 is the portion that extends from the end of the mounting part 41 in the +X direction along the rotation axis Rx toward the second arm 51E4 in the -Z direction. The fixing part 48 is the portion that extends from the end of the mounting part 41 in the -X direction along the rotation axis Rx toward the second arm 51E4 in the -Z direction. Furthermore, the fixing part 46 is the portion connecting the ends of the fixing parts 47 and 48 on the opposite side to the mounting part 41.

[0236] The retraction portion 49 is a portion used to prevent the end of the oscillator 5E in the -Z direction from contacting the base 4E when the oscillator 5E oscillates. In this embodiment, the retraction portion 49, like the retraction portion 45, is an opening that penetrates the base 4E along the +Y direction. However, it is not limited to this; the retraction portion 49 may also be a recess that opens in the +Y or -Y direction.

[0237] [Structure of the oscillator]

[0238] The oscillator 5E is supported on the base 4E. The oscillator 5E has an arm 51E and a rotating shaft 55.

[0239] The arm 51E is supported by a rotating shaft 55 mounted on the base 4E so that it can swing about a rotating axis Rx along the +X direction. In other words, the arm 51E is mounted on the base 4E via the rotating shaft 55 in a manner that allows it to swing about the rotating axis Rx. The arm 51E includes an arm body 51E1 and a weight-bearing part 51E5.

[0240] The arm body 51E1 includes a connecting part 51E2, a first arm 51E3, and a second arm 51E4. The weight-bearing part 51E5 includes a first weight-bearing part 51E6 disposed on the first arm 51E3 and a second weight-bearing part 51E7 disposed on the second arm 51E4.

[0241] The connecting part 51E2 is located at the center of the arm body 51E1 in the +Z direction orthogonal to the rotation axis Rx, connecting the first arm 51E3 and the second arm 51E4. The connecting part 51E2 has the same structure as the connecting part 521 and is supported by a pair of support parts 551 of the rotation axis part 55 so that it can swing about the rotation axis Rx.

[0242] The first arm 51E3 extends from the connecting portion 51E2 in the +Z direction. Like the arm body 52, the first arm 51E3 also has an enlargement portion 523, mounting portions 524 and 525, a first side portion 526, a second side portion 527, and a third side portion 528. Figure 19 The illustration of configuration unit 525 is omitted in the text.

[0243] In the enlarged portion 523 of the first arm 51E3, a plate member 91 of the first drive unit 61 and a magnet 7A are mounted on the first side portion 526 facing the +Z direction. In the enlarged portion 523 of the first arm 51E3, a plate member 91 of the second drive unit 62 and a magnet 7A are mounted on the second side portion 527 facing the +X direction. In the enlarged portion 523 of the first arm 51E3, a plate member 91 of the third drive unit 63 and a magnet 7A are mounted on the third side portion 528 facing the -X direction.

[0244] In addition, the first weight-bearing part 51E6 is composed of at least one weight-bearing component 54 fixed to at least one of the configuration parts 524 and 525 of the first arm 51E3.

[0245] The second arm 51E4 extends from the connecting portion 51E2 in the -Z direction. That is, the second arm 51E4 extends from the rotation axis Rx in the opposite direction to the direction in which the first arm 51E3 extends from the rotation axis Rx. The second arm 51E4 has a structure that is symmetrical with respect to the rotation axis Rx to the first arm 51E3. Specifically, the second arm 51E4 has an enlargement portion 523, arrangement portions 524 and 525, a first side portion 526, a second side portion 527, and a third side portion 528. Figure 19 The illustration of configuration unit 525 is omitted in the text.

[0246] In the enlarged portion 523 of the second arm 51E4, a plate member 91 of the fourth drive unit 64 and a magnet 7A are mounted on the first side portion 526 facing the -Z direction. In the enlarged portion 523 of the second arm 51E4, a plate member 91 of the fifth drive unit 65 and a magnet 7A are mounted on the second side portion 527 facing the +X direction. In the enlarged portion 523 of the second arm 51E4, a plate member 91 of the sixth drive unit 66 and a magnet 7A are mounted on the third side portion 528 facing the -X direction.

[0247] In addition, the second weight-bearing part 51E7 is composed of at least one weight-bearing component 54 fixed to at least one of the configuration parts 524 and 525 of the second arm 51E4.

[0248] [Structure and Configuration of the Drive Unit]

[0249] The first drive unit 61, the second drive unit 62, and the third drive unit 63 correspond to the first arm-side drive unit, which applies the driving force for swinging arm 51E3 to the first arm 51E3. The fourth drive unit 64, the fifth drive unit 65, and the sixth drive unit 66 correspond to the second arm-side drive unit, which applies the driving force for swinging arm 51E4 to the second arm 51E4. As described above, the fourth drive unit 64, the fifth drive unit 65, and the sixth drive unit 66 include multiple drive units 6A provided in the vibration generating device 3E. That is, each drive unit 61 to 66, in addition to having a magnet 7A, a coil 8A, a plate member 91, a holding member 92, and a terminal part 93, also has a control part (not shown).

[0250] In the first drive unit 61 of the vibration generating device 3E, a plate member 91 is mounted on the first side surface 526 of the first arm 51E3. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the +Z direction surface of the plate member 91 with their long axes along the +X direction. That is, the magnet 7A of the first drive unit 61 is a first arm-side magnet, located at a position on the first arm 51E3 separate from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 42 of the base 4E. The coil 8A is mounted on the -Z direction surface of the second plate-shaped portion 922 of the holding member 92 in a non-contact manner opposite to the magnet 7A. The coil 8A of the first drive unit 61 is a first arm-side coil. In the first drive unit 61, the magnetic poles of the surface of the first magnet member 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet member 7A2 opposite to the second extension 8A2 are different.

[0251] In the second drive unit 62 of the vibration generating device 3E, a plate member 91 is mounted on the second side surface 527 of the first arm 51E3. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the +X direction surface of the plate member 91 with their long axes along the +Z direction. That is, the magnet 7A of the second drive unit 62 is a first arm-side magnet, located on the first arm 51E3 at a position separated from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 43 of the base 4E. The coil 8A is mounted on the -X direction surface of the second plate-shaped portion 922 of the holding member 92 in a non-contact manner opposite to the magnet 7A. The coil 8A of the second drive unit 62 is a first arm-side coil. In the second drive unit 62, the magnetic poles of the surface of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0252] In the third drive unit 63 of the vibration generating device 3E, a plate member 91 is mounted on the third side surface 528 of the first arm 51E3. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the -X direction surface of the plate member 91 with their long axes along the +Z direction. That is, the magnet 7A of the third drive unit 63 is a first arm side magnet, located in the first arm 51E3 at a position separated from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 44 of the base 4E. The coil 8A is mounted on the +X direction surface of the second plate-shaped portion 922 of the holding member 92 in a non-contact manner opposite to the magnet 7A. The coil 8A of the third drive unit 63 is a first arm side coil. In the third drive unit 63, the magnetic poles of the surface of the first magnet component 7A1 opposite to the first extension 8A1 and the magnetic poles of the surface of the second magnet component 7A2 opposite to the second extension 8A2 are different.

[0253] In the fourth drive unit 64 of the vibration generating device 3E, a plate member 91 is mounted on the first side portion 526 of the second arm 51E4. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the -Z direction surface of the plate member 91 with their long axes along the +X direction. That is, the magnet 7A of the fourth drive unit 64 is a second arm-side magnet, located in the second arm 51E4 at a position separated from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 46 of the base 4E. The coil 8A is mounted on the +Z direction surface of the second plate-shaped portion 922 of the holding member 92 in a non-contact manner opposite to the magnet 7A. The coil 8A of the fourth drive unit 64 is a second arm-side coil. In the fourth drive unit 64, the magnetic poles of the face of the first magnet member 7A1 opposite to the first extension 8A1 and the magnetic poles of the face of the second magnet member 7A2 opposite to the second extension 8A2 are different.

[0254] In the fifth drive unit 65 of the vibration generating device 3E, a plate member 91 is mounted on the second side surface 527 of the second arm 51E4. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the +X direction surface of the plate member 91 with their long axes along the +Z direction. That is, the magnet 7A of the fifth drive unit 65 is a second arm-side magnet, located in the second arm 51E4 at a position separated from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 47 of the base 4E. The coil 8A is mounted on the -X direction surface of the second plate-shaped portion 922 of the holding member 92, opposite to the magnet 7A, in a non-contact manner. The coil 8A of the fifth drive unit 65 is a second arm-side coil. In the fifth drive unit 65, the magnetic poles of the face of the first magnet member 7A1 opposite to the first extension 8A1 and the magnetic poles of the face of the second magnet member 7A2 opposite to the second extension 8A2 are different.

[0255] In the sixth drive unit 66 of the vibration generating device 3E, a plate member 91 is mounted on the third side portion 528 of the second arm 51E4. The first magnet member 7A1 and the second magnet member 7A2 constituting the magnet 7A are fixed to the -X direction surface of the plate member 91 with their long axes along the +Z direction. That is, the magnet 7A of the sixth drive unit 66 is a second arm-side magnet, located in the second arm 51E4 at a position separated from the rotation axis Rx. The first plate-shaped portion 921 of the holding member 92 is fixed to the fixing portion 48 of the base 4E. The coil 8A is mounted on the +X direction surface of the second plate-shaped portion 922 of the holding member 92, opposite to the magnet 7A, in a non-contact manner. The coil 8A of the sixth drive unit 66 is a second arm-side coil. In the sixth drive unit 66, the magnetic poles of the face of the first magnet member 7A1 opposite to the first extension 8A1 and the magnetic poles of the face of the second magnet member 7A2 opposite to the second extension 8A2 are different.

[0256] Thus, in this embodiment, the magnetic poles of the face of the first magnet component 7A1 of each magnet 7A that faces the first extension 8A1 are the same in the drive units 61 to 66. In addition, the magnetic poles of the face of the second magnet component 7A2 of each magnet 7A that faces the second extension 8A2 are the same in the drive units 61 to 66.

[0257] [Structure of the Control Department]

[0258] The control units of each drive unit 61-66 generate a magnetic field in each coil 8A by allowing an alternating current to flow through the corresponding coil 8A. At this time, each control unit allows an alternating current of the same frequency to flow through each coil 8A, so that the first extension 8A1 of each coil 8A in the drive units 61-63, located in the +Z direction relative to the rotation axis Rx, becomes the same magnetic pole, and the first extension 8A1 of each coil 8A in the drive units 64-66, located in the -Z direction relative to the rotation axis Rx, becomes the same magnetic pole. Furthermore, each control unit allows an alternating current, with a phase shift of half a cycle relative to the alternating current flowing through the coils 8A of the drive units 61-63, to flow through the coils 8A of the drive units 64-66, in a manner where the magnetic poles of the first extension 8A1 in the coils 8A of the drive units 61-63 are different from those of the first extension 8A1 in the coils 8A of the drive units 64-66. That is, each control unit makes the direction of the magnetic field generated by the coil 8A of the drive unit 61 to 63 opposite to the direction of the magnetic field generated by the coil 8A of the drive unit 64 to 66, so that the alternating current of the same frequency flows through each coil 8A.

[0259] Therefore, it is possible to suppress the oscillation of arm 51E based on other drive units from being hindered by at least one of the drive units 61 to 66. Furthermore, since arm 51E can oscillate using the driving force of each drive unit 61 to 66, the rotational torque of arm 51E during oscillation can be increased. Additionally, drive units 61 to 66 may share a common control unit.

[0260] Furthermore, if the weight-bearing members 54 of the configuration parts 524 and 525 of the first arm 51E3 and the configuration parts 524 and 525 of the second arm 51E4 are positioned further away from the rotation axis Rx, the driving force of the arm 51E can be increased. Moreover, by symmetrically arranging the positions of the weight-bearing members 54 of the configuration parts 524 and 525 of the first arm 51E3 relative to the rotation axis Rx and the positions of the weight-bearing members 54 of the configuration parts 524 and 525 of the second arm 51E4 relative to the rotation axis Rx, the center of gravity of the arm 51E is set at the rotation axis Rx, thereby enabling the arm 51E to swing stably. Not limited to this symmetrical arrangement of the weight-bearing members 54, the positions or numbers of the weight-bearing members 54 of the first arm 51E3 and the second arm 51E4 can be different, causing the center of gravity of the arm 51E to shift away from the rotation axis Rx.

[0261] [Effects of the third embodiment]

[0262] The projector described above in this embodiment can achieve the same effect as the projector 1 in the first embodiment.

[0263] [Modifications of the third embodiment]

[0264] In the vibration generating device 3E, similar to the variation of the first embodiment described above, one or two of the drive units 61 to 63 arranged in the +Z direction relative to the rotation axis Rx may be omitted, and one or two of the drive units 64 to 66 arranged in the -Z direction relative to the rotation axis Rx may also be omitted.

[0265] Alternatively, variations of the first embodiment described above can be applied to the vibration generating device 3E.

[0266] Furthermore, the arm 51E of the vibration generating device 3E and the arm 51D of the second embodiment can both be integrated into the first arm 51E3 and the first weight-bearing part 51E6, or they can be integrated into the second arm 51E4 and the second weight-bearing part 51E7.

[0267] [Fourth Implementation]

[0268] Next, the fourth embodiment of the present invention will be described.

[0269] The projector of this embodiment has the same structure as the projector of the first embodiment, but the difference is that the arm is swayably mounted on the base via a plate. Furthermore, in the following description, parts that are the same or substantially the same as those already described are marked with the same reference numerals and their descriptions are omitted.

[0270] Figure 20 This is a top view of the vibration generating device 3F of the projector equipped with the vibration damping device in this embodiment, viewed from the +Y direction.

[0271] The projector in this embodiment, in addition to having Figure 20 The vibration generating device 3F shown replaces the vibration generating device 3A and has the same structure and function as the projector 1 of the first embodiment. That is, the vibration damping device of this embodiment, except that the vibration generating device 3F replaces the vibration generating device 3A, has the same structure and function as the vibration damping device 2 of the first embodiment.

[0272] The vibration generating device 3F has the same structure and function as the vibration generating device 3E in the third embodiment, except that it has a base 4F and an oscillator 5F replacing the base 4E and the oscillator 5E. That is, the vibration generating device 3F has a base 4F, an oscillator 5F and a plurality of drive units 6A, including a first drive unit 61, a second drive unit 62, a third drive unit 63, a fourth drive unit 64, a fifth drive unit 65 and a sixth drive unit 66.

[0273] [Structure of the base]

[0274] The base 4F is a plate-shaped component that, in addition to supporting the oscillator 5F, also fixes the retaining members 92 of each drive unit 61-66. The base 4F has a mounting part 4F1 that replaces the mounting part 41, but otherwise has the same structure and function as the base 4E.

[0275] The mounting part 4F1 is located at the center of the base 4F in the +Z direction, at the position of the clamping arm 51E. The mounting part 4F1 is fixed with a pair of mounting parts 5F12 of the plate 5F1 constituting the oscillator 5F.

[0276] [Structure of the oscillator]

[0277] The oscillator 5F is mounted on the base 4F. Except that the plate 5F1 replaces the rotating shaft 55, the oscillator 5F has the same structure as the oscillator 5E. That is, the oscillator 5F has an arm 51E and a plate 5F1.

[0278] Plate 5F1 is fixed to base 4F along the +X direction, forming the rotation axis Rx of arm 51E. Plate 5F1 has a fixing part 5F11, a pair of mounting parts 5F12 and a pair of torsion parts 5F13.

[0279] The fixing part 5F11 is the part of the plate 5F1 that is fixed to the connecting part 51E2 of the arm 51E. The fixing part 5F11 is located at the center of the plate 5F1 in the +X direction and is fixed to the surface of the connecting part 51E2 in the +Y direction by screw S2.

[0280] A pair of mounting parts 5F12 are positioned to clamp the fixing part 5F11 in the +X direction. The pair of mounting parts 5F12 are respectively fixed to the corresponding mounting part 4F1 in the mounting part 4F1 by screws S3.

[0281] A pair of twisting portions 5F13 are disposed between the fixed portion 5F11 and the pair of mounting portions 5F12. Specifically, one of the twisting portions 5F13 is disposed between the fixed portion 5F11 and the mounting portion 5F12 in the +X direction, while the other twisting portion 5F13 is disposed between the fixed portion 5F11 and the mounting portion 5F12 in the -X direction. The pair of twisting portions 5F13 extend linearly along the +X direction.

[0282] When the arm 51E is swung relative to the base 4F by the respective drive units 61 to 66, the pair of torsion units 5F13 twist around an axis in the +X direction, thereby enabling the arm 51E to swing. That is, the extension line of the axis connecting the pair of torsion units 5F13 is the rotation axis Rx of the arm 51E.

[0283] [Effects of the fourth implementation method]

[0284] The projector described above in this embodiment has the same effect as the projector in the third embodiment.

[0285] [Modifications of the fourth embodiment]

[0286] In the aforementioned vibration generating device 3F, the plate 5F1 has a pair of twisting portions 5F13 along the +X direction. That is, the pair of twisting portions 5F13 extend in a straight line along the +X direction. However, this is not a limitation, and the pair of twisting portions 5F13 may also be of other shapes.

[0287] Figure 21 This is a top view showing the deformation of the vibration generating device 3F. In detail, Figure 21 This is a top view of plate 5F2, which shows the deformation of plate 5F1, which is a vibration generating device 3F.

[0288] For example, the vibration generating device 3F can also be used Figure 21 The board material 5F2 shown replaces board material 5F1.

[0289] Plate 5F2 is fixed to the mounting portion 4F1 of the base 4F in the same manner as plate 5F1, forming the rotation axis Rx of arm 51E. Plate 5F2 has the same structure and function as plate 5F1, except that it has a pair of torsion portions 5F23 replacing the pair of torsion portions 5F13. That is, plate 5F2 has a fixing portion 5F11, a pair of mounting portions 5F12, and a pair of torsion portions 5F23.

[0290] Like the pair of torsion parts 5F13, a pair of torsion parts 5F23 are disposed between the fixed part 5F11 and the pair of mounting parts 5F12. When the arm 51E swings relative to the base 4F via each drive part 61-66, the pair of torsion parts 5F23 twists about an axis in the +X direction, thereby enabling the arm 51E to swing. That is, the extension line of the axis connecting the pair of torsion parts 5F23 is the rotation axis Rx of the arm 51E.

[0291] When viewed from the +Y direction, the pair of twisting portions 5F23 are each formed into a roughly U-shape that opens towards the +Z direction. By forming the pair of twisting portions 5F23 into such a shape, the strength of the pair of twisting portions 5F23 can be improved.

[0292] [Other variations of the fourth embodiment]

[0293] The vibration generating device 3F described above includes drive units 61 to 66. However, it is not limited to this; the vibration generating device 3F may also be configured without at least one of the drive units 61 to 66. In other words, the vibration generating device 3F may also be configured to include one of the drive units 61 to 66. For example, the vibration generating device 3F may also be configured to include at least one of the drive units 61 to 63 arranged in the +Z direction relative to the rotation axis Rx and at least one of the drive units 64 to 66 arranged in the -Z direction relative to the rotation axis Rx.

[0294] Alternatively, modifications of the first embodiment described above can be applied to the vibration generating device 3F of this embodiment.

[0295] Furthermore, the arm 51E of the vibration generating device 3F in this embodiment is similar to the arm 51D in the second embodiment. It can be formed by integrating the first arm 51E3 and the first weight-bearing part 51E6, or it can be formed by integrating the second arm 51E4 and the second weight-bearing part 51E7.

[0296] Alternatively, the arms 51, 51C, and 51D can be supported by plates 5F1 and 5F2 so that they can swing relative to the base about the rotation axis Rx.

[0297] [Variations on the implementation method]

[0298] This invention is not limited to the embodiments described above; variations and improvements within the scope of achieving the objectives of this invention are included in this invention.

[0299] In the first, third, and fourth embodiments described above, the weight-applying part 53 is composed of at least one weight-applying component 54 disposed in the configuration parts 524 and 525. In other words, the configuration parts 524 and 525 can be configured with multiple weight-applying components 54. However, this is not a limitation; for example, a weight-applying component selected from a variety of weight-applying components that differ in at least one aspect of weight and shape may be disposed as a weight-applying part in the configuration parts 524 and 525.

[0300] In the first, third, and fourth embodiments described above, arms 51, 51C, and 51E include configuration units 524 and 525. However, this is not a limitation; arms 51, 51C, and 51E may also be configured to include only one of the configuration units 524 and 525.

[0301] In the third and fourth embodiments described above, the first arm 51E3 and the second arm 51E4 of the arm 51E are respectively equipped with configuration portions 524 and 525. However, it is not limited to this, and it is also possible that one of the first arm 51E3 and the second arm 51E4 is equipped with a configuration portion that can be used to configure the weight-bearing member 54.

[0302] In the first, third, and fourth embodiments described above, the weighting member 54 constituting the weighting part 53 is formed in a generally cuboid shape. However, it is not limited to this, and the shape of the weighting member 54 may also be other shapes. For example, the weighting member 54 may also be formed in a generally cubic shape.

[0303] In the first, third, and fourth embodiments described above, the weighting members 54 may be arranged in the arrangement portions 524 and 525 along the +X direction, and multiple weighting members 54 may be arranged in the arrangement portions 524 and 525 in a direction orthogonal to the rotation axis Rx when viewed from the ±Y direction. However, this is not a limitation; the weighting members 54 may also be arranged in the arrangement portions 524 and 525 in a direction orthogonal to the rotation axis Rx when viewed from the ±Y direction. In this case, multiple weighting members 54 may be arranged in the arrangement portions 524 and 525 in a direction along the rotation axis Rx.

[0304] In the first, third, and fourth embodiments described above, the weighting components 54 may be stacked in the arrangement portions 524 and 525. However, this is not a limitation; the weighting components 54 may not necessarily be stacked in the arrangement portions 524 and 525. In other words, the structure of the vibration generating device may also be such that the weighting components 54 are not stacked.

[0305] In the first, third, and fourth embodiments described above, arms 51, 51C, and 51E are configured to be detachable from bases 4A, 4C, 4E, and 4F by attaching and detaching the rotating shaft 55 or the plates 5F1 and 5F2 relative to the bases 4A, 4C, 4E, and 4F. That is, arms 51, 51C, and 51E are detachably mounted to bases 4A, 4C, 4E, and 4F. However, this is not a limitation; in vibration generating devices, the arms may also be mounted in a non-detachable manner.

[0306] On the other hand, the structure in which the arm can be detachably mounted relative to the base is not limited to the rotating shaft 55 and the plates 5F1 and 5F2, but may also be other structures.

[0307] In the second embodiment described above, the rotational torque generated when the arm 51D, mounted on the base 4A, swings is different by varying the shape and arrangement of the weight-bearing part 53. However, this is not the only possibility; the rotational torque can also be different by varying the material of the arm 51D or other factors.

[0308] In the above embodiments, magnets 7A and 7B constituting the drive unit 6A are disposed on arms 51, 51C, 51D, and 51E via plate members 91, and coil 8A constituting the drive unit 6A is disposed on bases 4A, 4C, 4E, and 4F via holding members 92. However, this is not a limitation; coil 8A may also be disposed on other structures besides the arms, such as frame 23. Alternatively, coil 8A may be disposed on arms 51, 51C, 51D, and 51E, while magnets 7A and 7B, which are non-contactly opposite to coil 8A, may be disposed on structures outside the arms.

[0309] In the above embodiments, in arms 51, 51C, 51D, and 51E, the second side portion 527 and the third side portion 528 intersect a direction parallel to the rotation axis Rx. Specifically, the second side portion 527 and the third side portion 528 are orthogonal to the direction parallel to the rotation axis Rx. However, this is not a limitation; the second side portion 527 and the third side portion 528 can intersect only in a direction parallel to the rotation axis Rx, or they can be inclined relative to an imaginary surface orthogonal to the rotation axis Rx. That is, intersecting a direction parallel to the rotation axis Rx includes not only the case of being orthogonal to this parallel direction, but also the case of being inclined relative to an imaginary surface orthogonal to this parallel direction.

[0310] In the above embodiments, examples are given of applying the vibration damping device 2, which includes vibration generating devices 3A, 3C, 3E, and 3F, to a projector 1, which is an electronic device. However, the electronic device using the vibration damping device 2 is not limited to a projector, but can also be applied to other electronic devices.

[0311] Furthermore, the vibration generating device of the present invention can be used alone or incorporated into electronic devices.

[0312] [Summary of this invention]

[0313] The following is a summary of the invention.

[0314] The vibration generating device of the first aspect of the present invention includes: a base for transmitting vibration to an object; an arm disposed on the base in a manner capable of swinging about a rotation axis; at least one drive unit having a magnet and a coil disposed opposite to the magnet in a non-contact manner to swing the arm, one of the magnet and the coil being disposed at a position of the arm separated from the rotation axis, the arm including: a mounting part disposed at the position of the arm separated from the rotation axis; and a weighting part detachably mounted on the mounting part.

[0315] Based on this structure, by changing the structure of the weight-bearing part installed in the mounting section, the weight and center of gravity of the arm that swings relative to the base can be easily changed. Therefore, the magnitude of the vibration generated by the vibration generating device due to the swinging of the arm can be easily adjusted.

[0316] In the first method described above, the weighting section may be composed of at least one weighting component, and the configuration section may be configured to be able to configure multiple weighting components.

[0317] Based on this structure, by adjusting the number and position of the weight-applying components arranged in the mounting section, the weight and shape of the weight-applying components can be easily adjusted, thereby adjusting the weight and center of gravity of the arm. Therefore, the magnitude of the vibration generated by the vibration generating device due to the swinging of the arm can be easily adjusted.

[0318] In the first embodiment described above, the weight-applying component may also be configured to be stacked and arranged in the configuration section.

[0319] With this structure, the weight-bearing components arranged in the mounting section can be further stacked. This allows for the arrangement of more weight-bearing components in the mounting section, thus increasing the weight and shape of the weight-bearing section. Consequently, the weight of the arm and the center of gravity can be increased, allowing for more precise adjustment of the vibration generated by the vibration generating device.

[0320] In the first method described above, the weight-applying component may also be formed in a generally rectangular parallelepiped shape.

[0321] With this structure, the weight-bearing components can be easily stacked and configured.

[0322] In the first embodiment described above, the weight-applying components may be arranged along the rotation axis, and when viewed from a position opposite to the arrangement portion, the arrangement portion may be able to arrange multiple weight-applying components in a direction orthogonal to the rotation axis.

[0323] Here, when viewed from a position opposite to the configuration section, with the weight-applying component positioned orthogonally to the rotation axis, the position of the arm's center of gravity does not change significantly whether the configuration section has one weight-applying component or two weight-applying components.

[0324] In contrast, when the weight-applying component is positioned along the rotation axis when viewed from a position opposite to the mounting section, weight can be easily applied to the end of the arm opposite to the rotation axis. Therefore, whether the mounting section has one weight-applying component or two weight-applying components, the center of gravity of the arm can be varied considerably. Consequently, the center of gravity of the arm can be easily adjusted.

[0325] In the first method described above, the arm may also be detachably mounted on the base.

[0326] With this structure, the weight-applying part can be positioned on the arm's mounting section when the arm is removed from the base. Therefore, the positioning of the weight-applying part relative to the arm can be easily implemented.

[0327] The vibration generating device of the second aspect of the present invention comprises: a base that transmits vibration to an object; an arm detachably mounted on the base and capable of swinging about a rotation axis; at least one drive unit having a magnet and a coil disposed opposite to the magnet in a non-contact manner to swing the arm, wherein one of the magnet and the coil is disposed in a position separate from the rotation axis, and the arm is selected from a variety of arms with different rotational torques generated by the swinging of the arm and is mounted on the base.

[0328] With this structure, the magnitude of the vibration generated by the swinging of the arm can be adjusted by changing the arm mounted on the base. Therefore, the magnitude of the vibration generated by the vibration generating device can be easily adjusted.

[0329] In the second embodiment described above, the arm may also have a weight-bearing portion disposed at a position separate from the rotation axis. For various types of arms, at least one of the weight of the weight-bearing portion and the shape of the weight-bearing portion may be different.

[0330] Based on this structure, by changing the arm mounted on the base, the rotational torque generated by the swing of the arm can be adjusted, and the magnitude of the vibration generated by the vibration generating device can be reliably adjusted.

[0331] The vibration damping device of the third aspect of the present invention includes: a vibration generating device of the first or second aspect described above; a detection unit that detects vibration; and an operation control unit that causes the vibration generating device to generate a vibration that is opposite in phase to the vibration detected by the detection unit.

[0332] Based on this structure, the vibration generating device can achieve the same effect as the vibration generating device of the first or second method described above. Furthermore, since the vibration generating device can generate vibrations with the opposite phase to the vibration detected by the detection unit, it can reduce the vibration of the object to which the vibration damping device is installed.

[0333] The electronic device of the fourth aspect of the present invention has the vibration damping device of the third aspect described above.

[0334] Based on this structure, it can achieve the same effect as the vibration damping device of the third method mentioned above, and can reduce the vibration of electronic equipment.

Claims

1. A vibration generating device, characterized in that, It has the following characteristics: The base transmits vibrations to the object; An arm is mounted on the base in a manner that allows it to swing about a rotation axis. At least one drive unit having a magnet and a coil disposed non-contactly opposite to the magnet, causing the arm to swing. One of the magnet and the coil is positioned on the arm at a location separate from the rotation axis. The arm includes: The configuration part is located at a position on the arm that is separate from the rotation axis; and The weight-bearing component is detachably mounted on the configuration unit. The weight-applying section consists of at least one weight-applying component. The configuration unit is configured to be able to configure multiple of the weight-applying components.

2. The vibration generating device according to claim 1, characterized in that, The weight-applying components are configured to be stacked and arranged in the configuration section.

3. The vibration generating device according to claim 2, characterized in that, The weight-applying component is formed in a roughly rectangular shape.

4. The vibration generating device according to any one of claims 1 to 3, characterized in that, The weight-applying component is arranged along the rotation axis. When viewed from a position opposite to the configuration unit, the configuration unit can arrange multiple weight-applying components in a direction orthogonal to the rotation axis.

5. The vibration generating device according to any one of claims 1 to 3, characterized in that, The arm is detachably mounted on the base.

6. A vibration generating device, characterized in that, It has the following characteristics: The base transmits vibrations to the object; An arm, which is detachably mounted on the base, is capable of swinging about a rotation axis; At least one drive unit having a magnet and a coil disposed non-contactly opposite to the magnet, causing the arm to swing. One of the magnet and the coil is positioned separately from the rotation axis. The arm is selected from a variety of arms with different rotational torques generated by the swinging of the arm, and is mounted on the base. The arm has a weight-applying portion positioned separately from the rotation axis. Regarding the various types of arms, at least one of the weight of the weight-bearing portion of the arm and the shape of the weight-bearing portion is different.

7. A vibration damping device, characterized in that, It has the following characteristics: The vibration generating device according to any one of claims 1 to 6; The testing department detects vibrations; and The motion control unit causes the vibration generating device to generate a vibration that is in the opposite phase to the vibration detected by the detection unit.

8. An electronic device, characterized in that, It has the vibration damping device as described in claim 7.

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