Vibration device

Abstract

To provide a vibration device which can maintain output characteristics when being attached to an external device.SOLUTION: A vibration device 1A includes: a vibrator 2 having a predetermined vibration frequency; and a housing 3 for holding the vibrator 2. The housing 3 includes: a vibration unit 11 having an arrangement surface Pa on which a vibrator 2 is arranged; an engagement unit 12 provided on the arrangement surface Pa side, the engagement unit being engaged with an external attachment member K; and a separator 14 for separating the vibration unit 11 and the engagement unit 12 from each other so that the engagement unit 12 is not in contact with the vibrator 2.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a vibration device.

Background Art

[0002] As a conventional vibration device, there is, for example, a transparent speaker described in Patent Document 1. This conventional transparent speaker is a vibration device having a unimorph type or bimorph type diaphragm structure. This transparent speaker has a transparent piezoelectric magnet in which the lead portion of the transparent electrode provided on the front surface side is insulated from the transparent electrode on the back surface side and arranged on the back surface side. The diaphragm is provided on the back surface side of the transparent piezoelectric magnet. A pair of lead wires made of a conductive transparent resin or a transparent electrode material are provided on the diaphragm. The lead wires are electrically connected to the respective front and back electrodes.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0006] A vibration device relating to one aspect of the present disclosure comprises a vibrating body having a predetermined vibration frequency and a housing that holds the vibrating body, wherein the housing has a vibrating section having a placement surface on which the vibrating body is placed, an engaging section provided on the placement surface side that engages with an external mounting member, and a partition plate that separates the vibrating section and the engaging section so as not to contact the vibrating body.

[0007] In this vibration device, a partition plate is provided in the housing that holds the vibrating body, separating the vibrating part from the engaging part. By separating the vibrating part and the engaging part with the partition plate, it is prevented that the external mounting member that engages with the engaging part comes into contact with the vibrating body and the vibrating part, thereby suppressing the influence of vibrations caused by the external mounting member on the vibrations of the vibrating body and the vibrating part. Furthermore, since the partition plate is non-contact with the vibrating body, it is also possible to suppress the leakage of vibrations from the vibrating body and the vibrating part to the external device side via the mounting member. Therefore, in this vibration device, the output characteristics are maintained when it is mounted to an external device.

[0008] The partition plate may have flexibility toward the vibrating body. This allows for improved fit of the external mounting member to the engagement portion while maintaining the function of the partition plate.

[0009] The vibration device may be configured as an acoustic device for an external device to which it is attached by a mounting member. This vibration device can be suitably used as an audio output section of the external device, for example.

[0010] The partition plate may be positioned opposite the vibrating body at a predetermined distance. In this case, the vibrating part and the engaging part are separated from the vibrating body at a certain distance. Therefore, vibrations caused by external mounting members can be more reliably suppressed from affecting the vibrations of the vibrating body and the vibrating part. Furthermore, vibrations of the vibrating body and the vibrating part can be more reliably suppressed from leaking to the external device side through the mounting members. Simplification of the configuration also allows for a thinner vibration device.

[0011] The engaging portion may have a cover positioned opposite the partition plate at a predetermined distance. In this case, the engaging portion can securely lock the external mounting member.

[0012] A vibration space may be provided between the vibrating body and the vibrating part. In this case, the directivity of the sound output can be easily controlled by the vibration space.

[0013] In the vibrating section, the surface opposite to the placement surface may be provided with a thickened section that becomes thicker as it moves away from the vibrating body. By forming such a thickened section, the region in the vibrating section where the vibrating body is placed can be selectively vibrated. Therefore, the directivity of the sound output can be increased.

[0014] Due to the thickness of the material, the surface opposite the mounting surface may be curved. With this configuration, when a user wears an external device to which a vibration device is attached, the curved surface can conform to the user's head or other body parts. Therefore, the fit of the vibration device can be improved.

[0015] The thickened portion may be positioned to sandwich the vibrating element in a plan view of the housing. This allows for more selective vibration of the area where the vibrating element is located within the vibrating section. Therefore, the directivity of the sound output can be further enhanced.

[0016] The vibrating element has a rectangular shape in a plan view of the housing, and the thickened portion may be provided on the shorter side of the vibrating element. In this case, the area where the thickened portion is formed is not excessive, and the fit of the vibrating device can be improved when the user attaches an external device to which the vibrating device is mounted.

[0017] The thicker portion may have a notch that reduces the thickness of a part of the thicker portion, so as to include the area that overlaps with the vibrating element in a plan view of the housing. This allows the area where the vibrating element is located in the vibrating portion to vibrate more selectively. Therefore, the directivity of the sound output can be further enhanced.

[0018] The engaging portion may have a claw portion. In this case, an external attachment member can be detachably engaged by the claw portion. Therefore, the convenience of the vibration device can be improved.

Effect of the Invention

[0019] According to the present disclosure, maintenance of output characteristics is achieved when attaching to an external device.

Brief Description of the Drawings

[0020] [Figure 1] It is a perspective view showing a vibration device according to a first embodiment of the present disclosure. [Figure 2] It is a perspective view showing the vibration device shown in FIG. 1 with the cover removed. [Figure 3] It is a perspective view showing the vibration device shown in FIG. 2 with the partition plate further removed. [Figure 4] It is a cross-sectional view in the short side direction of the vibration device shown in FIGS. 1 to 3. [Figure 5] It is a perspective view showing a vibration device according to a second embodiment of the present disclosure. [Figure 6] It is a perspective view showing the vibration device shown in FIG. 5 with the partition plate removed. [Figure 7] It is a perspective view of the vibration device shown in FIG. 6 viewed from the back side. [Figure 8] It is a cross-sectional view in the short side direction of the vibration device shown in FIGS. 5 to 7. [Figure 9] It is a cross-sectional view in the long side direction of the vibration device shown in FIGS. 5 to 7.

Modes for Carrying Out the Invention

[0021] Hereinafter, with reference to the drawings, a preferred embodiment of a vibration device according to one aspect of the present disclosure will be described in detail. [First Embodiment]

[0022] Figure 1 is a perspective view showing a vibration device according to the first embodiment of this disclosure. Figure 2 is a perspective view showing the vibration device shown in Figure 1 with the cover removed. Figure 3 is a perspective view showing the vibration device shown in Figure 3 with the partition plate further removed. Figure 4 is a cross-sectional view of the vibration device shown in Figures 1 to 3 in the short direction. In this embodiment, the vibration device 1A is configured as an acoustic device such as a speaker or buzzer. The vibration device 1A can be attached to an external device such as a headset or head-up display by an attachment member K (see Figure 4) such as a belt, and functions as an audio output unit in the device.

[0023] As shown in Figures 1 to 4, the vibration device 1A comprises a vibrating body 2 having a predetermined vibration frequency and a housing 3 that holds the vibrating body 2. The vibrating body 2 is composed of a piezoelectric element 4, a wiring member 5, and a diaphragm 6. In this embodiment, the piezoelectric element 4 has a rectangular parallelepiped shape that is flattened in the thickness direction. The rectangular parallelepiped shape may include shapes in which the corners and edges are chamfered, or shapes in which the corners and edges are rounded. The piezoelectric element 4 is joined to one side of the diaphragm 6 by a bonding member such as double-sided tape.

[0024] The piezoelectric element 4 has a piezoelectric element and a pair of external electrodes. The piezoelectric element is composed of a laminate of multiple piezoelectric layers. Each piezoelectric layer is made of a piezoelectric material such as a piezoelectric ceramic. Examples of piezoelectric ceramic materials include PZT[Pb(Zr,Ti)O3], PT(PbTiO3), PLZT[(Pb,La)(Zr,Ti)O3], or barium titanate (BaTiO3).

[0025] Each piezoelectric layer is composed of, for example, a sintered ceramic green sheet containing the piezoelectric ceramic described above. In an actual piezoelectric element, each piezoelectric layer is integrated to such an extent that the boundaries between the piezoelectric layers are not discernible. Multiple internal electrodes (not shown) are arranged within the piezoelectric element. Each internal electrode is formed of a conductive material. Examples of conductive materials include Ag, Pd, and Ag-Pd alloys.

[0026] The wiring member 5 is a component that electrically connects the piezoelectric element 4 to an external device. The wiring member 5 is, for example, a flexible printed circuit board (FPC). One end of the wiring member 5 is electrically connected to each of the pair of external electrodes of the piezoelectric element 4. For the connection between one end of the wiring member 5 and the external electrodes of the piezoelectric element 4, for example, an anisotropic conductive adhesive can be used. The other end of the wiring member 5 is drawn out to one of the short sides of the piezoelectric element 4, as shown in Figure 3, and extends in the longitudinal direction of the vibration device 1A. The other end of the wiring member 5 is drawn out to the outside of the vibration device 1A through an opening 7 (see Figures 1 and 2) between the cover 13 and the partition plate 14 in the housing 3.

[0027] The diaphragm 6 is a plate-shaped member made of, for example, a metal material. Examples of metal materials that make up the diaphragm 6 include Ni-Fe alloy, Ni, brass, and stainless steel. In this embodiment, the diaphragm 6 has a rectangular shape in plan view, similar to the piezoelectric element 4. The longitudinal direction of the diaphragm 6 is aligned with the longitudinal direction of the piezoelectric element 4, and the short direction of the diaphragm 6 is aligned with the short direction of the piezoelectric element 4. The diaphragm 6 vibrates as the piezoelectric element 4 fluctuates in the thickness direction, and outputs sound based on a predetermined vibration frequency.

[0028] As shown in Figures 1 to 4, the housing 3 is formed as a plate overall, for example, from plastic. The planar shape of the housing 3 is rectangular, similar to the piezoelectric element 4 and the diaphragm 6. The longitudinal direction of the housing 3 is aligned with the longitudinal direction of the piezoelectric element 4, and the short direction of the housing 3 is aligned with the short direction of the piezoelectric element 4. As shown in Figure 4, the housing 3 has a vibrating section 11 having an arrangement surface Pa on which the vibrating body 2 is placed, and an engaging section 12 provided on the arrangement surface Pa side that engages with an external mounting member K. The housing 3 also has a cover 13 and a partition plate 14 for attaching the mounting member K to the vibrating device 1A.

[0029] The vibrating section 11 is the base portion of the housing 3. One side of the vibrating section 11 is the placement surface Pa. On the placement surface Pa side of the vibrating section 11, there is a pair of stepped sections 15A, 15A on which the diaphragm 6 is placed, and a pair of stepped sections 15B, 15B on which the partition plate 14 is placed. In a plan view, the stepped sections 15A, 15A and 15B, 15B are provided from one end to the other in the longitudinal direction of the housing 3 so as to sandwich the vibrating body 2 in the short direction of the housing 3 (see Figure 3). The long edge of the diaphragm 6 is fixed to the stepped section 15A, for example by adhesive. The long edge of the partition plate 14 is fixed to the stepped section 15B, for example by adhesive.

[0030] The stepped portion 15A provides a vibration space S between the vibrating body 2 and the vibrating part 11. The vibration space S has a flattened rectangular parallelepiped shape, depending on the height of the stepped portion 15A from the mounting surface Pa. The vibration space S extends from one end to the other in the longitudinal direction of the housing 3 between the diaphragm 6 of the vibrating body 2 and the mounting surface Pa of the vibrating part 11. The vibration space S is open to the outside at both the longitudinal ends of the housing 3. The vibrations in the vibrating body 2 and the vibrating part 11 propagate through the vibration space S in the longitudinal direction and are output to the outside of the housing 3 from both the longitudinal ends.

[0031] The partition plate 14 is a member that separates the vibrating part 11 and the engaging part 12. The partition plate 14 is formed in the shape of a plate, for example, from plastic or metal. The partition plate 14 has flexibility toward the vibrating body 2 side. The partition plate 14 may also have flexibility toward the opposite side of the vibrating body 2 (the cover 13 side). In a plan view, the partition plate 14 has a rectangular shape, similar to the piezoelectric element 4 and the diaphragm 6. The longitudinal direction of the partition plate 14 is along the longitudinal direction of the piezoelectric element 4, and the short direction of the partition plate 14 is along the short direction of the piezoelectric element 4. The length of the partition plate 14 in the short direction is slightly greater than the length of the diaphragm 6 in the short direction.

[0032] The partition plate 14 separates the vibrating portion 11 and the engaging portion 12 so as not to contact the vibrating body 2. Specifically, in this embodiment, the height of the stepped portion 15B (height from the top surface of the stepped portion 15A) is greater than the sum of the thicknesses of the vibrating body 2 (thickness of the diaphragm 6, the piezoelectric element 4, and the wiring member 5). When the piezoelectric element 4 and the diaphragm 6 are joined with double-sided tape, the thickness of the vibrating body 2 also includes the thickness of the double-sided tape. As a result, the partition plate 14 and the vibrating body 2 are positioned facing each other with a distance based on the difference between the height of the stepped portion 15B and the thickness of the vibrating body 2.

[0033] The distance between the partition plate 14 and the vibrating body 2 is, for example, smaller than the height of the vibration space S (height of the stepped portion 15A). This prevents the housing 3 from becoming excessively thick, and a thinner vibration device 1A may be provided. The distance between the partition plate 14 and the vibrating body 2 is not limited to this, and may be equal to the height of the vibration space S, or greater than the height of the vibration space S.

[0034] In this embodiment, the engaging portion 12 is composed of a pair of side wall portions 16, 16 provided on the top surfaces of the stepped portion 15B, as shown in Figure 4, and the cover 13 described above. The height of the side wall portions 16 (height from the top surface of the stepped portion 15B) is greater than or equal to the sum of the thickness of the partition plate 14 and the thickness of the external mounting member K. The cover 13 is fixed to the top surfaces of the side wall portions 16, 16, for example, by adhesive. As a result, the cover 13 is positioned to face the partition plate 14 at a predetermined distance.

[0035] The cover 13 is fixed to the side walls 16, 16, creating an insertion space V between the cover 13 and the partition plate 14 through which the mounting member K is inserted. The insertion space V has a flattened rectangular parallelepiped shape, depending on the difference between the height of the side walls 16 and the thickness of the partition plate 14. The insertion space V extends from one end to the other in the longitudinal direction of the housing between the cover 13 and the partition plate 14. At both ends in the longitudinal direction of the housing 3, the insertion space V is open to the outside. By inserting the mounting member K, such as a belt, through the insertion space V, the vibration device 1A can be attached to an external device.

[0036] As described above, in the vibration device 1A, a partition plate 14 is provided in the housing 3 that holds the vibrating body 2, separating the vibrating part 11 and the engaging part 12. By separating the vibrating part 11 and the engaging part 12 with the partition plate 14, the external mounting member K that engages with the engaging part 12 is prevented from coming into contact with the vibrating body 2 and the vibrating part 11, thereby suppressing the influence of vibrations caused by the external mounting member K on the vibrations of the vibrating body 2 and the vibrating part 11. Furthermore, since the partition plate 14 is not in contact with the vibrating body 2, it is also possible to suppress the leakage of vibrations from the vibrating body 2 and the vibrating part 11 to the external device side via the mounting member K. Therefore, in the vibration device 1A, the output characteristics are maintained when attached to an external device.

[0037] In this embodiment, the partition plate 14 may have flexibility toward the vibrating body 2. This allows for improved fit of the external mounting member K to the engaging portion 12 while maintaining the function of the partition plate 14.

[0038] In this embodiment, the vibration device 1A is configured as an acoustic device of an external device to which it is attached by the mounting member K. This vibration device 1A can be suitably used as an audio output section of the external device.

[0039] In this embodiment, the partition plate 14 is positioned to face the vibrating body 2 at a predetermined distance. With this configuration, the vibrating portion 11 and the engaging portion 12 are separated from the vibrating body 2 at a constant distance. Therefore, vibrations caused by the external mounting member K can be more reliably suppressed from affecting the vibrations of the vibrating body 2 and the vibrating portion 11. Furthermore, vibrations of the vibrating body 2 and the vibrating portion 11 can be more reliably suppressed from leaking to the external device side via the mounting member K. Simplification of the configuration also allows for a thinner vibration device 1A.

[0040] In this embodiment, the engaging portion 12 has a cover 13 that is positioned opposite the partition plate 14 at a predetermined distance. This allows the engaging portion 12 to securely lock the external mounting member K. In addition, in this embodiment, a vibration space S may be provided between the vibrating body 2 and the vibrating portion 11. This allows the directivity of the sound output to be easily controlled by the vibration space S. [Second Embodiment]

[0041] Figure 5 is a perspective view showing a vibration device according to the second embodiment of this disclosure. Figure 6 is a perspective view showing the vibration device shown in Figure 5 with the partition plate removed. Figure 7 is a perspective view of the vibration device shown in Figure 6 from the back side. Figure 8 is a cross-sectional view of the vibration device shown in Figures 5 to 7 in the short direction, and Figure 9 is a cross-sectional view in the long direction thereof. As shown in Figures 5 to 9, the vibration device 1B according to the second embodiment differs from the first embodiment in the configuration of the housing 3. The configuration of the piezoelectric element 4 and the wiring member 5 in the vibrating body 2 is the same as in the first embodiment, so a description is omitted.

[0042] The housing 3 of the vibration device 1B, similar to the first embodiment, has a vibrating section 11 having a placement surface Pa on which the vibrating body 2 is positioned, and an engaging section 12 provided on the placement surface Pa side that engages with an external mounting member K (see Figure 8). In this embodiment, the vibrating body 2 does not have a diaphragm 6, and the piezoelectric element 4 is directly joined to the placement surface Pa of the vibrating section 11 by a bonding member such as double-sided tape. In the housing 3 of the vibration device 1B, there is no vibration space S between the vibrating body 2 and the vibrating section 11, and the vibration of the vibrating section 11 is directly extracted to the outside.

[0043] As shown in Figure 6, a pair of stepped portions 15, 15 on the Pa side of the mounting surface of the vibrating portion 11 are provided, on which the partition plate 14 is placed. The stepped portions 15, 15 are provided from one end to the other in the longitudinal direction of the housing 3 so as to sandwich the vibrating body 2 in the short direction of the housing 3 in a plan view. The first and second embodiments are common in that the partition plate 14 separates the vibrating portion 11 and the engaging portion 12 so as to be non-contact with the vibrating body 2. As shown in Figures 8 and 9, the partition plate 14 and the vibrating body 2 are arranged to face each other with a distance based on the difference between the height of the stepped portion 15 and the thickness of the vibrating body 2.

[0044] In this embodiment, as shown in Figure 6, notches 17 are provided in each of the stepped portions 15, 15. In the example in Figure 6, the notches 17 are arc-shaped based on the circumference of a circle corresponding to the diameter of the piezoelectric element 4 in a plan view of the housing 3. The notches 17 of one stepped portion 15 and the notches 17 of the other stepped portion 15 are arranged so as to sandwich the piezoelectric element 4 in the short direction of the housing 3. The length of the chord of the notches 17 corresponds to the length of the piezoelectric element 4 in the longitudinal direction. In the regions where the notches 17, 17 are formed, the thickness of the vibrating portion 11 is smaller than in other regions of the vibrating portion 11, and the vibration region of the vibrating portion 11 by the vibrating body 2 is expanded.

[0045] In the vibrating section 11, a pair of thickened sections 18, 18 are provided on the surface opposite to the placement surface Pa (hereinafter referred to as the "opposite surface Pb"), as shown in Figures 6, 7, and 9, with the thickness increasing as it moves away from the vibrating body 2. In this embodiment, the thickened sections 18, 18 are provided on the short side of the vibrating body 2. In a plan view of the housing 3, the thickened sections 18, 18 are provided from one end to the other in the short direction of the housing 3, so as to sandwich the vibrating body 2 in the longitudinal direction of the housing 3.

[0046] In this embodiment, the thickened portions 18, 18 cause the opposite surface Pb of the vibrating portion 11 to become a curved surface 19. The opposite surface Pb is a gently curved surface 19 such that, when the housing 3 is viewed from the short side, the central side in the longitudinal direction of the housing 3 is concave (see Figure 9). As a result, the thickness of the vibrating portion 11 in the area where the piezoelectric element 4 is placed is smaller than the thickness of the vibrating portion 11 in the area surrounding the piezoelectric element 4. Due to the curved surface 19, the thickness of the vibrating portion 11 may gradually decrease as it approaches the central part in the longitudinal direction of the housing 3 (see Figure 9). The thickness of the vibrating portion 11 in the central part in the longitudinal direction of the housing 3 may be constant.

[0047] In this embodiment, as shown in Figures 7 and 9, the thickened portion 18 has a pair of notches 20, 20 that reduce the thickness of a portion of the thickened portion 18 so as to include a region that overlaps with the vibrating body 2 in a plan view of the housing 3. In the example of Figure 9, in a plan view of the housing 3, a portion of the pair of notches 20, 20 overlaps with the longitudinal end of the piezoelectric element 4, and the remaining portion of the pair of notches 20, 20 is located longitudinally outward from the piezoelectric element 4.

[0048] In the examples shown in Figures 7 and 9, the notches 20, like the notches 17 on the side of the vibrating section 11's mounting surface Pa, form an arc shape based on the circumference of a circle corresponding to the diameter of the piezoelectric element 4 in a plan view of the housing 3. The notches 20, 20 are arranged in a direction that intersects (orthogonal to) the notches 17, 17 on the side of the vibrating section 11's mounting surface Pa (see Figures 6 and 7). Here, the notches 20, 20 are arranged so as to sandwich the piezoelectric element in the longitudinal direction of the housing 3. In the regions where the notches 20, 20 are formed, the thickness of the vibrating section 11 is constant, and the vibration region of the vibrating section 11 caused by the vibrating body 2 is extended (see Figure 9).

[0049] The engaging portion 12 does not have a cover 13, but instead has a pair of claw portions 21, 21. The claw portions 21 are provided on the tops of a pair of side wall portions 16, 16, which are provided on the top surfaces of the stepped portions 15, 15, respectively. As shown in Figure 8, the claw portions 21 protrude from the tops of the side wall portions 16 in the short direction of the housing 3. The protrusion of the claw portions 21, 21 from the side wall portions 16, 16 provides an insertion space V between the claw portions 21 and the partition plate 14 through which the mounting member K can be inserted. The insertion space V extends from one end to the other in the longitudinal direction of the housing between the cover 13 and the partition plate 14. The insertion space V is open to the outside. By inserting the mounting member K, such as a belt, through the insertion space V, the vibration device 1B can be detachably attached to an external device.

[0050] In the vibration device 1B described above, the partition plate 14 separates the vibrating part 11 from the engaging part 12, preventing the external mounting member K that engages with the engaging part 12 from coming into contact with the vibrating body 2 and the vibrating part 11. This suppresses the influence of vibrations caused by the external mounting member K on the vibrations of the vibrating body 2 and the vibrating part 11. Furthermore, since the partition plate 14 is not in contact with the vibrating body 2, it is also possible to suppress the leakage of vibrations from the vibrating body 2 and the vibrating part 11 to the external device side via the mounting member K. Therefore, the output characteristics can be maintained when mounting to an external device.

[0051] In this embodiment, the vibrating section 11 is provided with a thickened section 18 on the surface opposite to the placement surface Pa, which becomes thicker as it moves away from the vibrating body 2. By forming such a thickened section 18, the region in the vibrating section 11 where the vibrating body 2 is placed can be selectively vibrated. Therefore, the directivity of the sound output can be increased.

[0052] In this embodiment, the thickened portion 18 causes the opposite surface Pb, which is opposite the placement surface Pa, to become a curved surface 19. With this configuration, when a user wears an external device to which the vibration device 1B is attached, the curved surface 19 can conform to the user's head or the like. Therefore, the fit of the vibration device 1B can be improved.

[0053] In this embodiment, the thickened portion 18 is provided so as to sandwich the vibrating body 2 in a plan view of the housing 3. This allows the area where the vibrating body 2 is located in the vibrating portion 11 to vibrate more selectively. Therefore, the directivity of the sound output can be further enhanced.

[0054] In this embodiment, the vibrating body 2 has a rectangular shape in a plan view of the housing 3. The thickened portion 18 is provided on the shorter side of the vibrating body 2. With this configuration, the area where the thickened portion 18 is formed is not excessive, and the fit of the vibrating device 1B can be improved when the user attaches an external device to which the vibrating device 1B is mounted.

[0055] In this embodiment, the thickened portion 18 has a notch 20 that reduces the thickness of a part of the thickened portion 18 so as to include a region that overlaps with the vibrating body 2 in a plan view of the housing 3. This allows the region where the vibrating body 2 is positioned in the vibrating portion 11 to vibrate more selectively. Therefore, the directivity of the sound output can be further enhanced.

[0056] In this embodiment, the engaging portion 12 has a claw portion 21. This allows the external mounting member K to be detachably engaged with the claw portion 21. Therefore, the convenience of the vibration device 1B can be improved.

[0057] The gist of this disclosure is as follows [1] to

[12] : [1] A vibration device comprising a vibrating body having a predetermined vibration frequency and a housing that holds the vibrating body, wherein the housing has a vibrating section having a placement surface on which the vibrating body is placed, an engaging section provided on the placement surface side and engaging with an external mounting member, and a partition plate that separates the vibrating section and the engaging section so as to be non-contact with the vibrating body. [2] The partition plate has flexibility toward the vibrating body side. [1] The vibrating device. [3] The vibration device according to [1] or [2], configured as an acoustic device of an external device to which the mounting member is attached. [4] The partition plate is arranged to face the vibrating body at a predetermined distance from the vibrating body in any of the vibration devices according to [1] to [3]. [5] The vibrating device according to any one of [1] to [4], wherein the engaging portion has a cover that is positioned opposite the partition plate at a predetermined distance. [6] A vibration device according to any one of [1] to [5], wherein a vibration space is provided between the vibrating body and the vibrating part. [7] The vibrating portion is provided on the surface opposite to the arrangement surface, wherein the thickness increases as it moves away from the vibrating body, according to any one of [1] to [4]. [8] The vibration device described in [7], wherein the thickened portion makes the surface opposite to the arrangement surface a curved surface. [9] The thickened portion is provided in a plan view of the housing so as to sandwich the vibrating body [7] or [8] the vibrating device.

[10] The vibrating body is rectangular in shape when viewed in plan of the housing, and the thickened portion is provided on the short side of the vibrating body. A vibrating device according to any one of [7] to [9].

[11] The thickened portion has a notch that reduces the thickness of a part of the thickened portion so as to include a region that overlaps with the vibrating body in a plan view of the housing. [7] to

[10] A vibrating device according to any one of these.

[12] The vibrating device according to any one of [7] to

[11] , wherein the engaging portion has a claw portion. [Explanation of symbols]

[0058] 1A, 1B...Vibration device, 2...Vibrating body, 3...Housing, 11...Vibrating part, 12...Engaging part, 13...Cover, 14...Partition plate, 18...Thick part, 19...Curved surface, 20...Notch part, 21...Claw part, K...Mounting member, Pa...Placement surface, S...Vibration space.

Claims

1. A vibrating body having a predetermined vibration frequency, The system comprises a housing that holds the vibrating body, The aforementioned enclosure is A vibrating section having an arrangement surface on which the vibrating body is arranged, An engaging portion is provided on the aforementioned mounting surface side and engages with an external mounting member, The device has a partition plate that separates the vibrating part and the engaging part so as not to contact the vibrating body, The vibrating section has a first stage on which the diaphragm constituting the vibrating body is arranged, and a second stage on which the partition plate is arranged. By arranging the diaphragm on the first stage, a vibration space is provided between the vibrating body and the vibrating part. By arranging the partition plate on the second stage, the partition plate and the vibrating body face each other with a predetermined distance between them. A vibration device in which the distance between the partition plate and the vibrating body is smaller than the height of the vibration space.

2. The vibration device according to claim 1, wherein the partition plate has flexibility toward the vibrating body.

3. The vibration device according to claim 1, configured as an acoustic device for an external device to which the mounting member is attached.

4. The vibration device according to any one of claims 1 to 3, wherein the engaging portion has a cover that is positioned opposite the partition plate at a predetermined distance.

5. A vibrating body having a predetermined vibration frequency, The system comprises a housing that holds the vibrating body, The aforementioned enclosure is A vibrating section having an arrangement surface on which the vibrating body is arranged, An engaging portion is provided on the aforementioned mounting surface side and engages with an external mounting member, The device has a partition plate that separates the vibrating part and the engaging part so as not to contact the vibrating body, A vibration device in which the vibrating portion is provided with a thickened portion on the surface opposite to the arrangement surface, which becomes thicker as it moves away from the vibrating body.

6. The vibration device according to claim 5, wherein the surface opposite to the arrangement surface is a curved surface due to the aforementioned thickened portion.

7. The vibration device according to claim 5, wherein the thickened portion is provided so as to sandwich the vibrating body in a plan view of the housing.

8. The vibrating element has a rectangular shape in a plan view of the housing. The vibration device according to claim 5, wherein the thickened portion is provided on the short side of the vibrating body.

9. The vibration device according to claim 5, wherein the thickened portion has a notch that reduces the thickness of a part of the thickened portion so as to include a region that overlaps with the vibrating body in a plan view of the housing.

10. The vibration device according to claim 5, wherein the engaging portion has a claw portion.

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