Vibration module

Abstract

The invention provides a vibration module. The vibration module (1) is provided with: a mover (10) having a bottom plate (12), a magnet (13), and a back yoke (11); a stator (20) having a frame (21), a substrate (24), a coil (22), and an insulator (23); and an elastic member (30) provided between the mover (10) and the stator (20). The mover (10), the stator (20), and the elastic member (30) are arranged along a first arrangement direction (A1). A first surface portion on one side of a frame (21) of the stator (20) in a first arrangement direction (A1) is attached to the mover (10) via an elastic member (30), a second surface portion (212b) on the other side of the frame (21) in the first arrangement direction (A1) can be attached to an object to be vibrated supported by a support body, and the mover (10) moves relative to the stator (20) in a second arrangement direction (A3) that is a direction intersecting the first arrangement direction (A1).

Description

Technical Field

[0001] The invention relates to a vibration module. Background Art

[0002] Conventionally, there is known a vibration actuator which is mounted on a notebook computer, a tablet-type portable information terminal, or the like and generates vibration when a user operates the actuator.

[0003] Patent Document 1 discloses a vibration actuator in which a yoke, a permanent magnet, and a plate constituting a magnetic circuit are arranged along a longitudinal direction extending along a central axis. In this vibration actuator, the magnetic circuit vibrates in the longitudinal direction extending along the central axis.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2000-4569

[0005] However, when a structure is adopted in which the vibration actuator is vibrated in the lateral direction, the device will be large-scaled. Summary of the invention

[0006] The vibration module of the embodiment of the present invention comprises: a mover having a bottom plate, a magnet and a back yoke; a stator having a frame, a substrate, a coil and an insulator; and an elastic component disposed between the mover and the stator. The mover, the stator and the elastic component are arranged along a first arrangement direction. The first surface portion of the frame of the stator on one side of the first arrangement direction is mounted on the mover via the elastic component, and the second surface portion of the frame on the other side of the first arrangement direction can be mounted on a vibrated body supported by a support body. The mover moves relative to the stator in a direction intersecting the first arrangement direction.

[0007] According to the present invention, it is possible to realize miniaturization and thinning of the vibration module. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 2 is a cross-sectional view schematically showing a vibration module according to an embodiment and an electronic device equipped with the vibration module.

[0009] Figure 2 It is an exploded perspective view of the vibration module.

[0010] Figure 3 It is an exploded perspective view of the vibration module.

[0011] Figure 4A 1 is a cross-sectional view schematically showing a vibration module and an electronic device according to a comparative example.

[0012] Figure 4B : is a graph showing the vibration characteristics of the vibration module according to the embodiment and the vibration characteristics of the vibration module according to the comparative example.

[0013] Figure 5 It is a perspective view of the appearance of a vibration module according to a modified example.

[0014] Description of symbols

[0015] 1: vibration module; 7: electronic device; 10: mover; 11: back yoke; 12: bottom plate; 13, 13a, 13b, 13c, 13d, 13e, 13f: magnet; 20: stator; 21, 31: frame; 22, 22a, 22b, 22c: coil; 23: insulating member; 24: substrate; 30: elastic member; 32: surface portion; 33: side portion; 40: protective member; 50: mounting member; 51: opening; 70: vibrated body; 71: support body; 110: through hole; 1 11, 111a, 111b: surface portion; 120: storage portion; 121: magnet storage hole; 122: mounting protrusion; 123, 123a, 123b: surface portion; 210: coil storage portion; 211: protrusion; 212: surface portion; 212a: first surface portion; 212b: second surface portion; 221: effective edge; 401: inner wall surface; 701: operating surface; 710: opposing surface; 711: side surface; A1: first arrangement direction; A2: cross direction; A3: second arrangement direction. DETAILED DESCRIPTION

[0016] Hereinafter, a vibration module according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0017] The vibration module is provided in electronic devices such as laptop computers, tablet-type portable information terminals, and vehicle-mounted display devices. Such electronic devices are provided with a touchpad or a touch pad having an operation surface for users to operate. When the user touches or traces the operation surface of the touchpad or the touch pad with a finger, the vibration module is driven to vibrate the touchpad or the touch pad. That is, when the user operates, the touchpad or the touch pad provides tactile feedback to the user.

[0018] <Implementation Method>

[0019] Figure 1 1 is a cross-sectional view schematically showing the vibration module 1 according to the embodiment and the electronic device 7 in which the vibration module 1 is mounted. Figure 2 , Figure 3 It is an exploded perspective view of the vibration module 1 according to the embodiment.

[0020] <Electronic equipment 7>

[0021] The electronic device 7 has a vibrated body 70 and a supporting body 71. The vibrated body 70 is, for example, an operating surface operated by a user such as the above-mentioned touch pad or touch panel. A planar position detection sensor is provided on the operating surface 701 of the vibrated body 70. The position detection sensor is, for example, a sensor of an electrostatic capacitance type, which detects the position of the user's finger in contact with the operating surface 701 on the plane. In addition, a pressure-sensitive sensor is provided on the operating surface 701 to detect the user pressing the operating surface 701. The signals output from these position detection sensors and pressure-sensitive sensors are input to the control unit of the electronic device 7.

[0022] The vibrated body 70 is mounted with a vibration module 1, and the vibrated body 70 is vibrated by the vibration module 1. Specifically, when the user operates the operation surface 701 of the vibrated body 70, the vibration module 1 is driven according to the signals output from the position detection sensor and the pressure-sensitive sensor, and the vibrated body 70 is vibrated. Thus, the vibration is transmitted to the user's finger via the operation surface 701, and tactile feedback is provided to the user.

[0023] The support body 71 is a component such as a frame that supports the vibrated body 70 so that it can vibrate, and is assembled to the electronic device 7. The support body 71 has an opposing surface 710 opposing the vibrated body 70 and a side surface 711 extending from the opposing surface 710 toward the vibrated body 70 and connected to the vibrated body 70. The vibration module 1 mounted on the vibrated body 70 does not contact the opposing surface 710 and the side surface 711. That is, a space is formed between the vibration module 1 and the opposing surface 710 and between the vibration module 1 and the side surface 711.

[0024] <Vibration module 1>

[0025] The vibration module 1 includes a mover 10, a stator 20, an elastic member 30, a protective member 40, and a mounting member 50. The mover 10, the stator 20, the elastic member 30, the protective member 40, and the mounting member 50 are arranged along Figure 1 , Figure 2 , Figure 3 In addition, sometimes Figure 1 , Figure 2 , Figure 3 The base point side of the first array direction A1 shown is referred to as a lower side, the front end side of the first array direction A1 is referred to as an upper side, and the first array direction A1 is referred to as an up-down direction. Figure 2 is an exploded perspective view of the vibration module 1 as viewed from above. Figure 3 This is an exploded perspective view of the vibration module 1 as seen from below. The vibration module 1 is attached to the lower surface of the vibrated body 70 .

[0026] <Motor 10>

[0027] When the coil 22 provided on the stator 20 described later is energized, the mover 10 moves relative to the stator 20 in the direction intersecting the first arrangement direction A1. In addition, in the following description, the direction intersecting the first arrangement direction A1 is referred to as the intersecting direction A2, and the direction intersecting the first arrangement direction A1 and the intersecting direction A2 is referred to as the second arrangement direction A3. In addition, in the following description, the base point side of the intersecting direction A2 is sometimes referred to as the left, and the front end side of the intersecting direction A2 is sometimes referred to as the right. The base point side of the second arrangement direction A3 is sometimes referred to as the rear, and the front end side of the second arrangement direction A3 is sometimes referred to as the front.

[0028] In the present embodiment, the mover 10 moves along the second arrangement direction A3 relative to the stator 20. The mover 10 includes a back yoke 11, a bottom plate 12, and a magnet 13.

[0029] <Back yoke 11>

[0030] The back yoke 11 is a flat plate-shaped member made of a material with high magnetic permeability such as iron or steel. The back yoke 11 has a surface portion 111 formed in a rectangular shape having two sides along the crossing direction A2 and two sides along the second arrangement direction A3. The surface portion 111 has a surface portion 111a on the upper side of the first arrangement direction A1 and a surface portion 111b on the lower side. Through holes 110 are formed near the four corners of the surface portion 111 of the back yoke 11. The through holes 110 penetrate the back yoke 11 inside and outside in the up-down direction.

[0031] <Base plate 12>

[0032] The bottom plate 12 is a flat plate-shaped member made of stainless steel such as SUS, which is a non-magnetic material. The bottom plate 12 has a surface portion 123 formed in a rectangular shape having two sides along the intersection direction A2 and two sides along the second arrangement direction A3. The surface portion 123 has a surface portion 123a on the upper side of the first arrangement direction A1 and a surface portion 123b on the lower side. In addition, the length (thickness) of the bottom plate 12 in the vertical direction is the same or substantially the same as the length (thickness) of the magnet 13 in the vertical direction described later.

[0033] The bottom plate 12 is arranged on the upper part of the back yoke 11. That is, the surface portion 123b of the bottom plate 12 is installed on the upper part of the surface portion 111a of the back yoke 11. A storage portion 120 and a magnet storage hole 121 are formed on the bottom plate 12. The storage portions 120 are respectively formed near the four corners of the surface portion 123a of the bottom plate 12, and store the elastic member 30 described later. The storage portion 120 is a recessed portion formed on the surface portion 123a of the bottom plate 12. A mounting protrusion 122 protruding downward corresponding to the position where the storage portion 120 is formed is formed on the surface portion 123b of the bottom plate 12. That is, the storage portion 120 and the mounting protrusion 122 are formed at a position overlapping with the through hole 110 of the back yoke 11 in the up and down direction. Therefore, when the bottom plate 12 is arranged on the back yoke 11, the mounting protrusion 122 is inserted into the through hole 110. That is, the mounting protrusion 122 and the through hole 110 are used for positioning when the back yoke 11 and the base plate 12 are mounted.

[0034] The magnet receiving hole 121 is formed near the center of the surface portion 123 of the bottom plate 12 to receive the magnet 13. The magnet receiving hole 121 is a through hole that passes through the bottom plate 12 in the vertical direction. The bottom plate 12 is provided with the same number of magnet receiving holes 121 as the number of magnets 13 described later. Figure 2 The case where six magnet receiving holes 121 are formed is shown. Each magnet receiving hole 121 is a through hole in a rectangular shape having a long side along the cross direction A2 and a short side along the second arrangement direction A3. The plurality of magnet receiving holes 121 are arranged along the second arrangement direction A3. That is, the plurality of magnet receiving holes 121 are arranged along the direction in which their respective short sides extend. Therefore, the plurality of magnet receiving holes 121 can be formed without increasing the length of the second arrangement direction A3 of the bottom plate 12.

[0035] The shape and arrangement of the magnet receiving holes 121 are determined by the shape and arrangement of the magnets 13 described later. Therefore, the magnet receiving holes 121 are not rectangular. The arrangement of the plurality of magnet receiving holes 121 is not limited to the second arrangement direction A3.

[0036] <Magnet 13>

[0037] The magnet 13 is formed into a columnar shape having a bottom surface and an upper surface, and the bottom surface is a rectangular shape having a long side along the cross direction A2 and a short side along the second arrangement direction A3. The length (thickness) of the magnet 13 in the vertical direction is not particularly specified. However, in order to suppress the enlargement of the vibration module 1 in the vertical direction, it is preferred that the thickness of the magnet 13 is small (thin) within the range that can be automatically processed. In this embodiment, the thickness of the magnet 13 can be less than 1 mm.

[0038] A plurality of magnets 13 are provided on the back yoke 11 and arranged along the second arrangement direction A3. Figure 2 As shown, the six magnets 13a, 13b, 13c, 13d, 13e, and 13f are arranged along the second arrangement direction A3. That is, the plurality of magnets 13 are arranged along the direction in which their respective short sides extend. Therefore, even when a plurality of magnets 13 are arranged, the length of the second arrangement direction A3 of the vibration module 1 can be suppressed from increasing.

[0039] Each magnet 13 is accommodated in a magnet accommodation hole 121 formed on the bottom plate 12. The lower surface of the magnet 13 is fixed to the surface portion 111a of the back yoke 11 by bonding or the like. In addition, among the plurality of magnets 13 arranged along the second arrangement direction A3, the magnetic poles (S pole and N pole) of the upper surfaces of adjacent magnets 13 are different from each other.

[0040] <Stator 20>

[0041] The stator 20 is disposed above the mover 10 and is attached to the lower surface of the vibrated body 70. The stator 20 includes a frame 21, a coil 22, an insulator 23, and a substrate 24.

[0042] <Frame 21>

[0043] The frame 21 is a plate-shaped member that supports the coil 22 and the insulating member 23. The frame 21 has a surface portion 212 formed in a rectangular shape having two sides along the intersection direction A2 and two sides along the second arrangement direction A3. The surface portion 212 has a first surface portion 212a on the lower side (one side) of the first arrangement direction A1 and a second surface portion 212b on the upper side (the other side). Therefore, the first surface portion 212a of the frame 21 is opposite to the surface portion 123a on the upper side of the bottom plate 12 of the mover 10 arranged below.

[0044] On the frame 21, a coil storage portion 210 is formed near the center of the surface portion 212. The coil storage portion 210 is a recessed portion formed on the first surface portion 212a of the frame 21. The coil 22 and the insulating member 23 are stored in the coil storage portion 210 and fixed by bonding or the like, whereby the coil 22 and the insulating member 23 are supported by the frame 21. By forming the coil storage portion 210 on the first surface portion 212a of the frame 21, a protrusion 211 protruding upward is formed at a position of the second surface portion 212b of the frame 21 that overlaps with the coil storage portion 210 in the vertical direction. The amount (length) of the protrusion 211 protruding upward is equal to or approximately equal to the thickness (length in the vertical direction) of the mounting component 50 described later.

[0045] <Coil 22>

[0046] The coil 22 is housed in the coil housing portion 210 formed on the first surface portion 212a of the frame 21 via an insulating member 23 described later, and is mounted by bonding or the like. The coil 22 is an air-core coil, and is a flat coil that is flat in the coil axis direction L. The coil 22 is arranged in a direction in which the coil axis direction L is consistent or substantially consistent with the first arrangement direction (vertical direction) A1. Therefore, the coil 22, which is a flat coil, is housed in the coil housing portion 210, which is a recessed portion, so that the length (thickness) of the stator 20 in the vertical direction can be reduced, making the vibration module 1 thinner in the vertical direction.

[0047] The coil 22 is in an oblong shape having two long sides, namely, effective sides 221, along the cross direction A2. Below the frame 21, three coils 22a, 22b, and 22c are arranged along the second arrangement direction A3. That is, the effective sides 221 of each coil 22 are arranged along the second arrangement direction A3. Therefore, on the frame 21, three coil storage portions 210 are arranged along the second arrangement direction A3.

[0048] Each coil 22 is opposed to two of the plurality of magnets 13. Specifically, in the coil 22a, one effective side 221 is opposed to the magnet 13a, and the other effective side 221 is opposed to the magnet 13b. In the coil 22b, one effective side 221 is opposed to the magnet 13c, and the other effective side 221 is opposed to the magnet 13d. In the coil 22c, one effective side 221 is opposed to the magnet 13e, and the other effective side 221 is opposed to the magnet 13f.

[0049] As described above, among the plurality of magnets 13 arranged along the second arrangement direction A3, the magnetic poles of the upper surfaces of the adjacent magnets 13 are different from each other. Therefore, each coil 22 is opposed to two magnets 13 of different polarities. Therefore, by switching the direction of the current flowing through the coil 22, the mover 10 can be vibrated along the second arrangement direction A3. In other words, the mover 10 moves along the second arrangement direction A3 in which the plurality of magnets 13 and the plurality of coils 22 are arranged.

[0050] <Insulating member 23>

[0051] The insulating member 23 is formed of an insulating material (eg, a resin material). One insulating member 23 is provided for each of the three coils 22 , and a total of three insulating members 23 are provided. The insulating member 23 is disposed between the coil 22 and the first surface portion 212 a of the frame 21 .

[0052] <Substrate 24>

[0053] The substrate 24 is a flexible printed circuit board (FPC). A portion of the substrate 24 is arranged inside the stator 20, and another portion of the substrate 24 is led out to the outside of the stator 20. The portion of the substrate 24 arranged inside the stator 20 is electrically connected to the coil 22. The other portion of the substrate 24 arranged outside the stator 20 is electrically connected to an external power supply circuit or the like. Thus, power is supplied from the outside to the coil 22 via the substrate 24, and current flows through the coil 22.

[0054] <Elastic member 30>

[0055] The elastic member 30 is formed of a resin material such as silicon, and is a columnar member extending along the first arrangement direction A1. The elastic member 30 is provided between the mover 10 and the stator 20. Specifically, the elastic member 30 is accommodated in a storage portion 120 formed on the bottom plate 12 of the mover 10. That is, the vibration module 1 has four elastic members 30. The lower surface of the elastic member 30 is fixed to the bottom plate 12 by an adhesive or the like. In addition, the upper surface of the elastic member 30 is fixed to the first surface portion 212a of the frame 21 of the stator 20 by an adhesive or the like.

[0056] As described above, the elastic member 30 is accommodated in the accommodation portion 120 which is a recessed portion formed in the bottom plate 12. Therefore, the vertical length (thickness) of the elastic member 30 can be increased by the vertical length (depth) of the accommodation portion 120 without increasing the vertical thickness of the vibration module 1.

[0057] When the mover 10 moves along the second arrangement direction A3 as described above, the elastic member 30 elastically deforms in the second arrangement direction A3 of the mover 10, and applies force to the mover 10 in the direction opposite to the moving direction. Therefore, the elastic member 30 supports the bottom plate 12 of the mover 10 so that it can vibrate relative to the frame 21 of the stator 20.

[0058] As described above, the thickness of the elastic member 30 in the vertical direction is greater than that in the case where the housing portion 120 is not provided on the bottom plate 12. Therefore, the elastic member 30 is softer (has lower rigidity) than in the case where the elastic member 30 is provided without the housing portion 120. Therefore, the resonance frequency of the elastic member 30 becomes lower, and the attenuation of the vibration acceleration of the mover 10 becomes more rapid.

[0059] <Protective member 40>

[0060] The protective component 40 is formed of an elastic material such as rubber or polyurethane. The protective component 40 is a frame-shaped component formed along the outer periphery of the surface portion 123a of the bottom plate 12 of the mover 10. The protective component 40 is arranged between the mover 10 and the stator 20. Specifically, the protective component 40 is fixed to the upper surface of the bottom plate 12 of the mover 10 by bonding or the like. Thus, the gap between the mover 10 and the stator 20 can be reduced in the up and down directions. In addition, since the protective component 40 is formed in a frame shape, the storage portion 120 and the magnet storage hole 121 formed on the bottom plate 12 are located at a position closer to the inside than the inner wall surface 401 of the protective component 40. That is, the elastic component 30 stored in the storage portion 120, the magnet 13 stored in the magnet storage hole 121, and the coil 22 arranged opposite to the magnet 13 are provided on the inner side of the protective component 40. As a result, it is possible to prevent foreign matter such as dust from mixing into the interior of the vibration module 1 and causing adverse effects on the operation of the magnet 13 and the coil 22.

[0061] Furthermore, since the protection member 40 is formed of an elastic material, it functions as an impact absorbing portion when an impact is applied to the vibration module 1 , thereby protecting the vibration module 1 . Therefore, the durability of the vibration module 1 can be improved.

[0062] <Installation component 50>

[0063] The mounting component 50 is a component for mounting the vibration module 1 on the vibrated body 70, and is, for example, a double-sided adhesive tape. The lower surface of the mounting component 50 is mounted on the second surface portion 212b of the frame 21 of the stator 20. An opening portion 51 is formed in the mounting component 50. The opening portion 51 is formed at a position that surrounds the protrusion 211 formed on the second surface portion 212b of the frame 21 when the mounting component 50 is mounted on the second surface portion 212b of the frame 21. When the adhesive flows into the opening portion 51, the space formed by the opening portion 51, the protrusion 211, and the second surface portion 212b of the frame 21 becomes an adhesive reservoir. As a result, the peel strength of the mounting component 50 is improved.

[0064] The upper surface of the mounting member 50 is mounted on the lower surface of the vibrated body 70. That is, the mounting member 50 is provided between the frame 21 and the vibrated body 70, thereby mounting the frame 21 on the lower surface of the vibrated body 70. Thus, only the upper surface of the vibration module 1 is mounted on the lower surface of the vibrated body 70.

[0065] <Operation of vibration module 1>

[0066] As described above, two adjacent magnets 13 are opposed to one coil 22. Moreover, the magnetic poles (S pole and N pole) of different polarities of these two adjacent magnets 13 are opposed to one coil 22. In a state where the coil 22 is not energized, the bottom plate 12 is located in a neutral stable position where the center of the surface portion 111 coincides or substantially coincides with the center of the surface portion 212 of the frame 21. At this time, one effective side 221 of the coil 22 is opposed to the S pole of the magnet 13, and the other effective side 221 is opposed to the N pole of the magnet 13.

[0067] As described above, the coil 22 is excited when current flows through the substrate 24, generating a magnetic field acting on the magnet 13. When the coil 22 is energized, current flows in opposite directions along the two adjacent effective sides 221 arranged along the second arrangement direction A3. Therefore, the direction of the magnetic field generated by one effective side 221 of the coil 22 is opposite to the direction of the magnetic field generated by the other effective side 221. Moreover, since one effective side 221 of the coil 22 is opposite to the S pole of the magnet 13 and the other effective side 221 is opposite to the N pole of the magnet 13, the magnet 13 moves forward or backward along the second arrangement direction A3. As a result, the mover 10 having the bottom plate 12 and the back yoke 11 equipped with the magnet 13 moves forward or backward relative to the stator 20 equipped with the coil 22 along the second arrangement direction A3 intersecting the first arrangement direction A1.

[0068] When the direction of the current flowing through the coil 22 is switched, the direction of the magnetic field generated by one effective side 221 of the coil 22 is switched, and the direction of the magnetic field generated by the other effective side 221 is also switched. Thus, the moving direction of the magnet 13 along the second arrangement direction A3 is switched. As a result, the moving direction of the mover 10 relative to the stator 20 along the second arrangement direction A3 is switched. Each time the direction of the current flowing through the coil 22 is repeatedly switched, the moving direction of the mover 10 relative to the stator 20 is switched, and thus the mover 10 vibrates relative to the stator 20 along the second arrangement direction A3. That is, the mover 10 vibrates in a direction intersecting with the first arrangement direction A1 in which the mover 10 and the stator 20 are arranged.

[0069] The elastic member 30 resonates due to the vibration of the mover 10, and the vibration of the mover 10 is transmitted to the stator 20. The vibration is transmitted to the vibrated body 70 to which the stator 20 is attached. As a result, the vibrated body 70 vibrates, and the user who contacts the vibrated body 70 feels the vibration.

[0070] <Comparative Example>

[0071] Figure 4A1 is a cross-sectional view schematically showing a vibration module 100 of a comparative example and an electronic device 700 on which the vibration module 100 is installed. The vibration module 100 is, for example, a linear resonance actuator (LRA). The vibration module 100 has a mover 114 and a stator 124. In the vibration module 100, the upper surface of the stator 124 is mounted on the lower surface of a vibrated body 720 supported by a support body 721 of the electronic device 700. When the vibration module 100 is powered on, the mover 114 vibrates in a direction A4 intersecting with a first arrangement direction A1 in which the mover 114 and the stator 124 are arranged. As a result, the vibrated body 720 vibrates.

[0072] Figure 4B is a graph showing the vibration characteristics of the vibration module 1 according to the embodiment and the vibration characteristics of the vibration module 100 according to the comparative example. Figure 4B In FIG. 1 , the horizontal axis represents the resonance frequency [Hz] of the vibration module 1 , 100 in the range of 200 [Hz] to 300 [Hz], and the vertical axis represents the acceleration [Grms] of the vibration of the vibration module 1 , 100 . Figure 4B In FIG. 1 , a vibration characteristic P1 indicated by a solid line represents the vibration characteristic of the vibration module 1 according to the embodiment, and a vibration characteristic P2 indicated by a dotted line represents the vibration characteristic of the vibration module 100 according to the comparative example.

[0073] like Figure 4B As shown in the vibration characteristic P2 , the vibration acceleration of the vibration module 100 of the comparative example increases sharply when the frequency exceeds approximately 230 [Hz], reaches a peak value of approximately 1.7 [Grms] when the frequency exceeds approximately 240 [Hz], and then decreases sharply.

[0074] In contrast, as shown in the vibration characteristic P1, in the vibration module 1 of the embodiment, the acceleration reaches a peak value of 2.1 [Grms] at a resonance frequency of 220 [Hz]. However, in the vibration module 1 of the embodiment, as described above, since the elastic member 30 with low rigidity is used, the acceleration of the vibration can be suppressed from being rapidly attenuated, thereby achieving vibration in a wide band.

[0075] The acceleration of the vibration of the vibration module 1 shows a value greater than the peak value of the acceleration of the vibration of the vibration module 100 of the comparative example, i.e., 1.7 [Grms], in the entire range described above. That is, the vibration module 1 of the embodiment vibrates at a greater acceleration than the vibration module 100 of the comparative example in the frequency range of 300 [Hz] or less, which is considered to be easy for people to feel the vibration. In the vibration module 1 of the embodiment, since the elastic component 30 with low rigidity is used, the vibration generated by the plurality of magnets 13 and the plurality of coils 22 is transmitted to the vibrated body 70 in a state where the attenuation of the vibration is suppressed. As a result, high vibration of the vibration module 1 is achieved, and the user can easily feel the vibration of the electronic device 7. In addition, the vibration module 1 can vibrate in a wider frequency band and suppress the attenuation of the vibration, so that the user can feel vibrations of multiple different frequencies with a higher vibration amount.

[0076] According to the above-described embodiment, at least one of the following effects can be obtained.

[0077] (1) The vibration module 1 has a mover 10, a stator 20, and an elastic member 30 arranged along a first arrangement direction A1. The first surface portion 212a on one side of the frame 21 of the stator 20 in the first arrangement direction A1 is mounted on the mover 10 via the elastic member 30. The second surface portion 212b on the other side of the frame 21 of the stator 20 in the first arrangement direction A1 is mounted on the vibrated body 70 supported by the support body 71. As a result, the attenuation of the vibration of the mover 10 is suppressed by the elastic member 30, and the vibration module 1 can vibrate at a high vibration amount in a wide frequency band (wideband). As a result, for example, multiple vibrations with different frequencies can be generated at a high vibration amount by one vibration module 1. That is, one vibration module 1 can make the user feel multiple vibrations with different tactile sensations. In addition, since the vibration module 1 can be vibrated at a high vibration amount, even if the vibrated body 70 is large, the vibrated body 70 can be vibrated without increasing the number of vibration modules 1 mounted on the vibrated body 70. Furthermore, the mover 10 of the vibration module 1 moves in the second arrangement direction A3 intersecting the first arrangement direction A1 relative to the stator 20. Therefore, compared with the case where the mover moves along the first arrangement direction A1, the vertical thickness of the vibration module 1 is reduced, which contributes to miniaturization of the vibration module 1.

[0078] (2) The bottom plate 12 has a surface portion 123a that is opposite to the first surface portion 212a of the frame 21, and a storage portion 120 is provided on the surface portion 123a as a recessed portion for storing the elastic member 30. As a result, the length of the elastic member 30 in the vertical direction can be increased without increasing the thickness of the vibration module 1 in the vertical direction, thereby contributing to the miniaturization of the device. In addition, the elastic member 30 can reduce rigidity by increasing the length in the vertical direction, thereby suppressing the vibration attenuation of the mover 10. As a result, the vibration module 1 can vibrate at a higher vibration amount in a wider frequency band (wideband).

[0079] (3) The vibration module 1 has a protective member 40 disposed between the bottom plate 12 and the frame 21, and the protective member 40 has a frame shape along the outer periphery of the bottom plate 12. The magnet 13, the coil 22, and the elastic member 30 are disposed inside the protective member 40. Thus, foreign matter such as dust can be prevented from entering the interior of the vibration module 1 and causing adverse effects on the operation of the magnet 13 and the coil 22.

[0080] (4) The vibration module 1 has a mounting member 50 disposed between the second surface portion 212b of the frame 21 and the vibrated body 70, and the mounting member 50 mounts the frame 21 on the vibrated body 70. The second surface portion 212b of the frame 21 is provided with a protrusion 211 that protrudes toward the vibrated body 70. The mounting member 50 is provided with an opening portion 51 that accommodates the protrusion 211. Thus, by accommodating the protrusion 211 in the opening portion 51, the amount of the protrusion 211 protruding upward, that is, the thickness of the coil 22 and the insulating member 23 is offset by the thickness of the mounting member 50. As a result, it is possible to suppress the vibration module 1 from being enlarged in the vertical direction. In addition, when the adhesive is allowed to flow into the opening portion 51, the space formed by the opening portion 51, the protrusion 211, and the second surface portion 212b of the frame 21 becomes an adhesive reservoir, so that the peel strength of the mounting member 50 can be improved.

[0081] (5) The bottom plate 12 has a mounting protrusion 122 protruding toward the back yoke 11, and the mounting protrusion 122 is inserted into the through hole 110 of the back yoke 11. This makes it easy to position the bottom plate 12 and the back yoke 11 when mounting them. In addition, since the mounting protrusion 122 is inserted into the through hole 110, it is possible to suppress the vibration module 1 from being enlarged in the vertical direction.

[0082] (6) The plurality of magnets 13 and the plurality of coils 22 are arranged along the second arrangement direction A3 intersecting the first arrangement direction A1. This can increase the acceleration of the vibration of the vibration module 1 and make it easier for the user to feel the vibration of the electronic device 7.

[0083] (7) Magnet receiving holes 121 are provided on the surface portion 123a of the bottom plate 12 as receiving holes for receiving the plurality of magnets 13, respectively. The plurality of magnet receiving holes 121 are arranged along the second arrangement direction A3. Thus, the thickness of the magnets 13 in the vertical direction is offset by the thickness of the bottom plate 12, thereby contributing to the miniaturization of the vibration module 1 in the vertical direction.

[0084] <Modification>

[0085] The stator 20 included in the vibration module 1 is not limited to the one including the frame 21 of the above-described embodiment.

[0086] Figure 5 : is a perspective view of the appearance of the vibration module 1 of the modified example. The frame 31 of the stator 20 of the vibration module 1 of the modified example has a surface portion 32 and a side portion 33. The surface portion 32 is in the same plate shape as the surface portion 212 of the frame 21 of the embodiment, and is formed into a rectangular shape having two sides along the intersection direction A2 and two sides along the second arrangement direction A3. However, the surface portion 32 is a larger surface than the surface portion 123 of the bottom plate 12 of the mover 10.

[0087] The side surface portion 33 is connected to the edge of the front side and the edge of the rear side of the surface portion 32, and extends downward along the first arrangement direction A1. That is, the end surface of the upper side of the side surface portion 33 is connected to the surface portion 32. In the first arrangement direction A1, the end surface of the lower side of the side surface portion 33 is located at a position lower than the surface portion 123a on the upper side of the bottom plate 12 of the mover 10. Thus, in the up-down direction of the front side and the back side, the gap generated between the mover 10 and the stator 20 can be closed by the side surface portion 33, so that foreign matter such as dust can be prevented from mixing into the interior of the vibration module 1. In addition, since the surface portion 32 is larger than the bottom plate 12 of the mover 10, it is possible to prevent the movement of the mover 10 relative to the stator 20 from being interfered with by the side surface portion 33. That is, in the vibration module 1 of the modified example, the same vibration characteristics as the vibration module 1 of the embodiment can also be shown.

[0088] In a performance test performed after manufacturing the vibration module 1 , the coil 22 can be energized in a state where the side surface portion 33 is pressed by a jig or the like. This allows the vibration state of the mover 10 to be measured.

[0089] In the above-described modified example, the side surface portion 33 is provided on the front side and the rear side of the surface portion 32 , but the side surface portion 33 may be provided on the right side and the left side of the surface portion 32 .

[0090] According to the modification, in addition to at least one of the effects obtained by the above-described embodiment, the following effects can be obtained.

[0091] (8) The frame 31 has a plate-like surface portion 32 and a side portion 33 extending along the first arrangement direction A1. One end surface of the side portion 33, that is, the upper end surface, is connected to the surface portion 32. This prevents foreign matter such as dust from entering the vibration module 1.

[0092] In addition, the present technology can adopt the following structures.

[0093] (1) A vibration module, comprising: a mover having a bottom plate, a magnet and a back yoke; a stator having a frame, a substrate, a coil and an insulator; and an elastic component, which is arranged between the mover and the stator, the mover, the stator and the elastic component are arranged along a first arrangement direction, a first surface portion of the frame of the stator on one side of the first arrangement direction is mounted on the mover via the elastic component, and a second surface portion of the frame on the other side of the first arrangement direction can be mounted on a vibrated body supported by a supporting body, and the mover moves relative to the stator in a direction intersecting the first arrangement direction.

[0094] (2) The vibration module according to (1), wherein the bottom plate has a surface portion facing the first surface portion of the frame, and a recessed portion for accommodating the elastic member is provided in the surface portion.

[0095] (3) The vibration module according to (1) or (2), wherein the vibration module has a protective component arranged between the base plate and the frame, the protective component has a frame shape along the outer periphery of the base plate, and the magnet, the coil and the elastic component are arranged on the inner side of the protective component.

[0096] (4) A vibration module according to any one of (1) to (3), wherein the vibration module has a mounting component arranged between the second surface portion of the frame and the vibrated body, the mounting component mounts the frame to the vibrated body, a protrusion protruding toward the vibrated body is provided on the second surface portion of the frame, and an opening portion for accommodating the protrusion is provided on the mounting component.

[0097] (5) The vibration module according to any one of (1) to (4), wherein the bottom plate has a mounting protrusion protruding toward the back yoke, and the mounting protrusion is inserted into a through hole of the back yoke.

[0098] (6) The vibration module according to any one of (1) to (5), wherein the plurality of magnets and the plurality of coils are arranged along a second arrangement direction intersecting the first arrangement direction, and the mover moves relative to the stator along the second arrangement direction.

[0099] (7) The vibration module according to (6), wherein the bottom plate has a surface portion opposite to the first surface portion of the frame, and storage holes for respectively storing the plurality of magnets are provided on the surface portion, and the plurality of storage holes are arranged along the second arrangement direction.

[0100] (8) The vibration module according to any one of (1) to (7), wherein the frame has a plate-shaped surface portion and a side portion extending along the first arrangement direction, and the side portion is connected to the surface portion at an end surface on one side.

Claims

1. A vibration module, comprising: A mover having a bottom plate, a magnet and a back yoke; a stator having a frame, a base plate, a coil, and an insulator; and an elastic component, which is arranged between the mover and the stator, The mover, the stator and the elastic member are arranged along a first arrangement direction, The first surface portion of the frame of the stator on one side of the first arrangement direction is mounted on the mover via the elastic member, and the second surface portion of the frame on the other side of the first arrangement direction can be mounted on a vibrated body supported by a supporting body. The mover moves relative to the stator in a direction intersecting the first arrangement direction.

2. The vibration module according to claim 1, in, The bottom plate has a surface portion facing the first surface portion of the frame, The surface portion is provided with a recessed portion for accommodating the elastic member.

3. The vibration module according to claim 1, in, The vibration module has a protection member provided between the bottom plate and the frame, the protection member having a frame shape along the outer periphery of the bottom plate, The magnet, the coil, and the elastic member are provided inside the protection member.

4. The vibration module according to claim 1, in, The vibration module includes a mounting member provided between the second surface portion of the frame and the vibrated body, the mounting member mounting the frame to the vibrated body. The second surface of the frame is provided with a protrusion protruding toward the vibrated body. The mounting member is provided with an opening portion for accommodating the protruding portion.

5. The vibration module according to claim 1, in, The bottom plate has a mounting protrusion protruding toward the back yoke, The mounting protrusion is inserted into a through hole provided in the back yoke.

6. The vibration module according to claim 1, in, The plurality of magnets and the plurality of coils are arranged along a second arrangement direction intersecting the first arrangement direction. The mover moves along the second arrangement direction relative to the stator.

7. The vibration module according to claim 6, in, The bottom plate has a surface portion facing the first surface portion of the frame, The surface portion is provided with receiving holes for receiving the plurality of magnets respectively. The plurality of storage holes are arranged along the second arrangement direction.

8. The vibration module according to claim 1, in, The frame has a plate-shaped surface portion and a side surface portion extending along the first arrangement direction, and the side surface portion is connected to the surface portion at one end surface.

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