WO2022113701A1

WO2022113701A1 - Vibration device

Info

Publication number: WO2022113701A1
Application number: PCT/JP2021/040811
Authority: WO
Inventors: 宣匡北森
Original assignee: 株式会社村田製作所
Priority date: 2020-11-27
Filing date: 2021-11-05
Publication date: 2022-06-02

Abstract

Provided is a vibration device having improved vibration efficiency. This vibration device comprises: a light transmission body cover 11; a vibration body 12 having a cylindrical body 16, which has one end 16a and another end 16b and which supports the light transmission body cover 11 on the one end 16a side, and having a flange 17, which has a first surface 17a located on the one end 16a side of the cylindrical body 16 and which extends from the other end 16b of the cylindrical body 16 to the outside and/or the inside of a side wall 16c of the cylindrical body 16; a piezoelectric element 13 which is disposed in the vibration body 12 and which vibrates the vibration body 12; a case 14 which is disposed on the other end 16b side of the cylindrical body 16 and which comes into contact with the flange 17 of the vibration body 12; and a plurality of fixing parts 15 which are arranged at intervals on the first surface 17a of the flange 17 of the vibration body 12 and which fix the vibration body 12 and the case 14.

Description

Vibration device

The present invention relates to a vibrating device.

A droplet removing device for removing droplets and the like adhering to the light flux passing region of the drip-proof cover is known.

For example, Patent Document 1 discloses a droplet exclusion device provided with a vibrating member that is connected to an end of a curved surface forming a dome portion of an optical element and generates bending vibration in the dome portion. In the droplet removing device described in Patent Document 1, the vibrating member is controlled to generate a predetermined vibration with respect to the dome portion to reduce and remove the adhered droplets and the like.

Japanese Unexamined Patent Publication No. 2017-170303

The droplet removing device described in Patent Document 1 still has room for improvement in terms of improving vibration efficiency.

Therefore, the present invention provides a vibration device with improved vibration efficiency.

The vibration device according to one aspect of the present invention is
With a translucent body cover,
A cylindrical body having one end and the other end and supporting the translucent body cover on the one end side, and the cylinder extending from the other end side of the tubular body to the outside or the inside of the side wall of the tubular body. A vibrating body having a brim having a first surface located on the one end side of the shape, and a vibrating body having.
A piezoelectric element arranged on the vibrating body and vibrating the vibrating body,
A case arranged on the other end side of the tubular body and in contact with the brim portion of the vibrating body, and a case.
A plurality of fixing portions, which are arranged at intervals on the first surface of the brim portion of the vibrating body and fix the vibrating body and the case,
To prepare for.

According to the present invention, it is possible to provide a vibration device having improved vibration efficiency.

Perspective view of the vibration device according to the first embodiment Front view of the vibrating device of FIG. Sectional drawing of the vibrating apparatus of FIG. Enlarged view of region R1 in FIG. 3A An exploded perspective view of the vibrating device of FIG. The figure which shows the simulation result of the maximum displacement amount distribution of the vibration apparatus of FIG. 1 when there is no manufacturing variation. The figure which shows the simulation result of the maximum displacement amount distribution of the vibration apparatus of FIG. 1 when there is a manufacturing variation. A graph showing the simulation results of the relationship between the number of fixed portions arranged on the brim and the maximum displacement of the translucent body cover 11. In the vibration device 10 of FIG. 1, the simulation result of the relationship between the ratio of the area of the portion pressed by the fixed portion 15 to the area of the first surface of the brim portion and the maximum displacement amount of the translucent body cover 11 is shown. graph A perspective view showing a vibration device according to a modification 1 of the vibration device 10 of FIG. Front view of the vibrating device of FIG. 8A Front view showing the vibration device according to the modification 2 of the first embodiment. Partial sectional view which shows the vibration apparatus which concerns on Embodiment 2. Partial sectional view which shows the vibration apparatus which concerns on Embodiment 3. Partial perspective view showing the vibration device according to the fourth embodiment. Partial perspective view showing the process of mounting the fixed portion in the vibration device of FIG. Partial perspective view showing the process of mounting the fixed portion in the vibration device of FIG. Partial perspective view showing the process of mounting the fixed portion in the vibration device of FIG. Partial perspective view showing the process of mounting the fixed portion in the vibration device of FIG. A perspective view showing the vibration device according to the fifth embodiment. Sectional drawing of the vibrating apparatus of FIG. The figure which shows an example of the assembly method of the vibration apparatus of FIG. A perspective view showing a vibration device according to a modification 1 of the fifth embodiment. Sectional drawing of the vibrating apparatus of FIG. A perspective view showing a vibration device according to a modification 2 of the fifth embodiment. The figure for demonstrating an example of the assembling method of the vibration apparatus of FIG. The figure for demonstrating an example of the assembling method of the vibration apparatus of FIG. Sectional drawing which shows the vibration apparatus which concerns on the modification 3 of Embodiment 5. Partial sectional view of the vibrating apparatus according to the sixth embodiment. Partial sectional view which shows the vibration apparatus which concerns on the modification of Embodiment 6. Partial perspective view showing the vibration device according to the seventh embodiment.

(Background to the present invention)
Cameras used outdoors, such as in-vehicle cameras and surveillance cameras, or cameras mounted on drones, are provided with a cover made of glass or transparent plastic so as to cover the lens because it is exposed to wind and rain. If foreign matter such as water droplets adheres to the cover, the foreign matter may be reflected in the image captured by the camera, obstructing the field of view of the camera and making it impossible to obtain a clear image.

Therefore, by disposing a piezoelectric body on the drip-proof cover as in the droplet exclusion device described in Patent Document 1, the drip-proof cover is flexed and vibrated to reduce the amount of foreign matter such as water droplets adhering to the drip-proof cover. A device to remove it is being studied.

In the droplet exclusion device described in Patent Document 1, the piezoelectric element is adhered and fixed to the flange portion of the drip-proof cover. Therefore, due to the vibration of the piezoelectric element, the flange portion of the drip-proof cover, which is out of the field of view of the image pickup device, also vibrates. That is, there is a problem that the vibration of the piezoelectric element escapes to the flange portion of the drip-proof cover, and the vibration efficiency is lowered.

Further, there is a problem that the vibration of the piezoelectric element cannot be efficiently transmitted to the drip-proof cover due to the manufacturing variation of the droplet exclusion device, and the vibration efficiency is lowered.

The present inventors have found that the vibration efficiency can be improved by pressing the brim portion forming the node of the vibrating body at intervals, and have reached the following invention.

With such a configuration, it is possible to provide a vibration device with improved vibration efficiency.

The number of the plurality of fixed portions is 3 or more and 6 or less.
The plurality of fixing portions may be arranged at equal intervals.

With such a configuration, it is possible to improve the vibration efficiency while maintaining the impact resistance of the vibration device.

The number of the plurality of fixed portions is three.
The area of the portion of the first surface of the brim of the vibrating body that is pressed by the plurality of fixing portions is 35% or less of the area of the first surface of the brim of the vibrating body. May be good.

The plurality of fixing portions may have a spring property.

With such a configuration, the brim portion can be pressed against the case and firmly fixed by the elastic force of the first holding portion of the fixing portion. Further, by changing the elastic constant of the spring, the spring performance can be easily changed, so that the degree of freedom in design can be improved.

The plurality of fixing portions are located on the case side of the first pressing portion and the first pressing portion arranged on the first surface of the brim portion of the vibrating body and face the first pressing portion. It may have a second holding portion arranged so as to be provided, and a connecting portion connecting the first holding portion and the second holding portion.

With such a configuration, a plurality of fixed portions can be easily attached to the vibration device. Further, depending on the performance of the vibrating device, it is possible to easily make a design change such as changing the number of fixed portions.

The first holding portion may be provided at the tip of the first holding portion and may have a protruding portion protruding toward the first surface of the brim portion of the vibrating body.

With such a configuration, the area for pressing the brim of the vibrating body becomes smaller, so it can be pressed with a larger force. Therefore, it is possible to improve the impact resistance of the vibration device while improving the vibration performance.

The brim portion has a second surface facing the first surface of the brim portion and a side surface of the brim portion connecting the first surface and the second surface, and the side surface of the brim portion has the first surface. 2 Multiple brim side notches larger than the holding part are formed,
The case has a third surface located on the brim side of the case, a fourth surface facing the third surface, and a case side surface connecting the third surface and the fourth surface. ,
On the side surface of the case, a plurality of case-side notches larger than the second holding portion are formed so as to communicate with the plurality of brim-side notches of the brim.
The case has a plurality of stoppers that project from the fourth surface to the opposite side of the brim.
The connecting portion of the plurality of fixing portions is arranged along the side surface of the brim portion and the side surface of the case.
The plurality of stoppers may be brought into contact with the second pressing portion to restrict the movement of the plurality of fixing portions in a direction along the side surface of the brim portion and the side surface of the case.

With such a configuration, a plurality of fixed portions can be easily incorporated into the vibrating device. Further, maintainability can be improved.

The second pressing portion of the plurality of fixing portions may be embedded inside the case.

With such a configuration, the vibration device can be easily assembled and the manufacturing cost can be reduced.

A plurality of notches larger than the plurality of fixed portions may be formed in the brim portion of the vibrating body.

With such a configuration, the number of parts can be reduced and the manufacturing cost can be reduced.

moreover,
A ring-shaped member arranged along the brim and the case,
Equipped with
The plurality of fixing portions are formed so as to extend from the end portion of the ring-shaped member on the brim portion side toward the brim portion.
The ring-shaped member has a first threaded portion formed on an inner wall along the case.
The case may have a second threaded portion, which is formed in a portion of the ring-shaped member in contact with the inner wall and screwed with the first threaded portion.

With such a configuration, a plurality of fixed portions can be easily arranged in the vibrating device.

moreover,
A sealing member arranged at a portion where the brim portion of the vibrating body and the case come into contact with each other.
May be provided.

With such a configuration, it is possible to provide a vibration device having waterproofness.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the following description is merely an example and is not intended to limit the present disclosure, its application, or its use. Further, the drawings are schematic, and the ratios of the dimensions and the like do not always match the actual ones.

(Embodiment 1)
[overall structure]
FIG. 1 is a perspective view of the vibration device 10 according to the first embodiment. FIG. 2 is a front view of the vibration device 10 of FIG. FIG. 3A is a cross-sectional view of the vibration device 10 of FIG. FIG. 3B is an enlarged view of the region R1 of FIG. 3A. FIG. 4 is an exploded perspective view of the vibration device 10 of FIG. In the figure, the X and Y directions mean the radial direction of the vibrating device 10, and the Z direction means the thickness direction of the vibrating device 10.

As shown in FIG. 1, the vibrating device 10 according to the first embodiment includes a translucent body cover 11, a vibrating body 12, a piezoelectric element 13 (see FIGS. 3A and 4), a case 14, and four fixings. A unit 15 is provided. The vibration device 10 can be used as an image pickup device by accommodating an image pickup unit (not shown) containing an optical element, an image pickup element, a sensor component, and the like. The image pickup unit can image an external image pickup object of the vibration device 10 through the translucent body cover 11 of the vibration device 10.

The vibrating device 10 transmits the vibration of the piezoelectric element 13 (see FIGS. 3A and 4) arranged in the vibrating body 12 to the translucent body cover 11 via the vibrating body 12 to vibrate the translucent body cover 11. It is a device for removing foreign matter such as water droplets adhering to the translucent body cover 11. The vibrating device 10 may be provided with a conductor (not shown) that gives a potential to the piezoelectric element 13.

Each component constituting the vibration device 10 will be described in detail below.

<Translucent body cover>
The translucent body cover 11 functions as a cover for preventing foreign matter from adhering to the lens of the image pickup unit and protecting the lens from stones or the like when the image pickup unit is arranged inside the vibrating device 10. In the present embodiment, as shown in FIGS. 1 and 2, the translucent body cover 11 is formed in a disk shape.

As the material of the translucent body cover 11, for example, glass such as soda glass, borosilicate glass, aluminosilicate glass, or quartz glass, translucent plastic, translucent ceramics, synthetic resin, or the like can be used. can. By forming the translucent body cover 11 with tempered glass whose strength has been improved by, for example, chemical strengthening, the strength of the translucent body cover 11 can be increased. In the case of the resin, for example, acrylic, cycloolefin, polycarbonate, polyester and the like can be used. Further, in order to increase the strength, a coating layer made of DLC (Diamond-like Carbon) or the like may be formed on the surface of the translucent body cover 11, and the surface may be antifouled or foreign substances such as water droplets may be removed. A coating layer such as a hydrophilic film, a water-repellent film, a parent oil, or an oil-repellent film may be formed for the purpose of the above.

<Vibrator>
The vibrating body 12 vibrates the translucent body cover 11 by receiving the vibration of the piezoelectric element 13. As shown in FIG. 3A, the vibrating body 12 has a tubular body 16 and a brim portion 17.

The tubular body 16 has one end 16a and the other end 16b, and supports the translucent body cover 11 on the one end 16a side. Specifically, a plate-shaped member 16d extending inside and / or outside the side wall 16c is provided on one end 16a side of the tubular body 16, and the translucent body cover 11 is supported by the plate-shaped member 16d. In the present embodiment, the plate-shaped member 16d is formed so as to extend inside the tubular body 16. As shown in FIG. 4, in the present embodiment, the tubular body 16 is formed in a cylindrical shape.

The brim portion 17 is formed so as to extend from the other end 16b side of the tubular body 16 to the outside of the side wall 16c of the tubular body 16. In the present embodiment, the brim portion 17 has a spring property. Since the brim portion 17 is provided on the vibrating body 12, a node which is a portion of the vibrating body 12 where the displacement due to vibration is minimized is formed. In this embodiment, the brim portion 17 is a node. The brim portion 17 has a first surface 17a located on the one end 16a side of the tubular body 16. Further, the brim portion 17 may have a second surface 17b facing the first surface 17a.

The vibrating body 12 and the translucent body cover 11 can be adhered to each other by, for example, an adhesive.

As the material of the vibrating body 12, for example, metal or ceramics can be used. As the metal, for example, stainless steel, 42 alloy, 50 alloy, Invar, Super Invar, Kovar, aluminum, duralumin and the like can be used. Alternatively, it may be made of ceramics such as alumina and zirconia. It may be formed of a semiconductor such as Si. The surface of the vibrating body 1 may be covered with an insulating material.

<Piezoelectric element>
The piezoelectric element 13 is arranged on the vibrating body 12 as shown in FIGS. 3A and 4. Specifically, the piezoelectric element 13 is arranged on one end 16a side of the tubular body 16. In the present embodiment, the piezoelectric element 13 is arranged on the opposite side of the translucent body cover 11 of the plate-shaped member 16d of the tubular body 16. The piezoelectric element 13 vibrates, for example, when a voltage is applied, causing the vibrating body 12 to vibrate.

The piezoelectric element 13 can be fixed to the vibrating body 12 with, for example, an adhesive. In the present embodiment, the piezoelectric element 13 has an annular plate-like shape (see FIG. 4). The shape of the piezoelectric element 13 is not limited to the shape of an annular plate, and may be any shape as long as it can vibrate the vibrating body 12.

The piezoelectric element 13 has a piezoelectric body and an electrode. Examples of the material for forming the piezoelectric material include barium titanate (BaTIO ₃ ), lead titanate / lead zirconate (PZT: PbTIO ₃ / PbZrO ₃ ), lead titanate (PbTIO ₃ ), and lead titanate (PbNb ₂ O). ₆ ), suitable piezoelectric ceramics such as bismuth titanate (Bi ₄ Ti ₃ O ₁₂ ), (K, Na) NbO ₃ , or appropriate piezoelectric single crystals such as LiTaO ₃ and LiNbO ₃ can be used.

The electrode may be, for example, a Ni electrode. The electrode may be an electrode made of a metal thin film such as Ag or Au, which is formed by a sputtering method. Alternatively, the electrode can be formed by plating or thin film deposition in addition to the sputtering method.

The piezoelectric element 13 is controlled by, for example, a control unit. The control unit has, for example, an excitation circuit for applying a drive signal that generates vibration. The excitation circuit is connected to the piezoelectric element 13 via, for example, a feeding conductor. The piezoelectric element 13 vibrates the vibrating body 12 in the thickness direction (Z direction) of the vibrating device 10 based on the drive signal from the excitation circuit. When the piezoelectric element 13 vibrates, the tubular body 16 vibrates in the thickness direction (Z direction). In the vibrating device 10, the translucent body cover 11 vibrates by vibrating the tubular body 16, and foreign matter such as water droplets adhering to the translucent body cover 11 is removed.

<Case>
As shown in FIGS. 1 and 3A, the case 14 is arranged on the other end 16b side of the tubular body 16 of the vibrating body 12 and is in contact with the brim portion 17 of the vibrating body 12. The above-mentioned imaging unit and the like can be arranged inside the case 14. In the present embodiment, the case 14 is a plate-shaped member as shown in FIG. 4, but the shape of the case 14 is not limited to this, and accommodates an image pickup unit or other components of the vibration device 10. Any shape that can be used is sufficient.

<Fixed part>
The fixing portion 15 is arranged at intervals on the first surface 17a of the brim portion 17 of the vibrating body 12, and fixes the vibrating body 12 and the case 14. In this embodiment, as shown in FIG. 2, four fixing portions 15 are arranged.

As shown in FIGS. 3A and 3B, the fixing portion 15 has a first pressing portion 15a, a second pressing portion 15b, and a connecting portion 15c. The first holding portion 15a is formed in a plate shape and is arranged on the first surface 17a of the brim portion 17 of the vibrating body 12. The second pressing portion 15b is located closer to the case 14 than the first pressing portion 15a, and is arranged so as to face the first pressing portion 15a. The connecting portion 15c connects the first pressing portion 15a and the second pressing portion 15b.

Since the fixed portion 15 has such a shape, as shown in FIGS. 3A and 3B, the vibrating body 12 and the case 14 are sandwiched between the brim portion 17 and the case 14 of the vibrating body 12 by the fixing portion 15. And can be fixed.

As the material of the fixing portion 15, for example, metal, synthetic resin, ceramics, or the like can be used. The fixing portion 15 and the brim portion 17 and the case 14 can be connected, for example, by welding or welding.

In this embodiment, as shown in FIG. 2, four fixing portions 15 are arranged at equal intervals. Specifically, the four fixing portions 15 are arranged so as to have an angle θ1 with respect to the center c1 of the translucent body cover 11. In this embodiment, the angle θ1 is 90 degrees. By arranging the four fixing portions 15 at equal intervals, it is possible to prevent the vibrating body 12 and the case 14 from being released from being fixed due to external vibration or impact on the vibrating device 10. ..

<Arrangement of fixed parts>
Since the brim portion 17 is provided on the vibrating body 12, the portion of the brim portion 17 becomes a node. Therefore, when the vibrating body 12 vibrates due to the vibration of the piezoelectric element 13, the amount of displacement of the brim portion 17 is smaller than that of the tubular body 16. In the case of a design center shape with no manufacturing variation, the displacement distribution of the brim 17 of the vibrating body 12 is axisymmetric with respect to the center c1 of the translucent body cover 11, and the displacement is small over the entire brim 17. ing. In this case, since the vibration of the piezoelectric element 13 is efficiently transmitted to the translucent body cover 11, the maximum displacement amount of the translucent body cover 11 does not change even if the entire brim portion is pressed. However, due to manufacturing variations, a portion where the displacement amount becomes unevenly large is generated in the brim portion 17. The manufacturing variation is, for example, a deviation in the mounting position between the translucent body cover 11 and the vibrating body 12. It has been found that when the entire brim portion 17 is pressed in the case of manufacturing variation, the maximum displacement amount of the translucent body cover 11 is reduced. Therefore, a simulation of the maximum displacement amount of the translucent body cover 11 in consideration of manufacturing variations was performed, and the optimum arrangement and occupancy of the fixed portion 15 were examined.

FIG. 5A is a diagram showing a simulation result of the maximum displacement amount distribution of the vibration device 10 of FIG. 1 when there is no manufacturing variation. FIG. 5B is a diagram showing simulation results of the maximum displacement amount distribution of the vibration device 10 of FIG. 1 when there are manufacturing variations. The simulation results of FIGS. 5A and 5B are simulation results when the brim portion 17 of the vibrating body 12 is not fixed. FIG. 6 is a graph showing a simulation result of the relationship between the number of fixed portions 15 arranged on the brim portion 17 and the maximum displacement amount of the translucent body cover 11. FIG. 7 shows the ratio of the area of the portion pressed by the fixed portion 15 to the area of the first surface 17a of the brim portion 17 in the vibrating device 10 of FIG. 1 and the maximum displacement amount of the translucent body cover 11. It is a graph which shows the simulation result of a relationship.

When there is no manufacturing variation in the vibrating device 10, according to the simulation result when the vibrating device 10 is vibrated by the piezoelectric element 13, as shown in FIG. 5A, the maximum displacement amount of the translucent body cover 11 becomes large, but the vibration occurs. The maximum displacement of the brim portion 17 of the body 12 is small as a whole. At this time, the maximum displacement amount of the brim portion 17 of the vibrating body 12 is axisymmetric with respect to the center c1 (see FIG. 2) of the translucent body cover 11. If there is no manufacturing variation in the vibrating device 10, the maximum displacement amount of the translucent body cover 11 is 8.26 μm.

On the other hand, assuming mass production of the vibrating device 10, some manufacturing variation will occur. According to the simulation result when the vibrating device 10 is vibrated by the piezoelectric element 13 when the vibrating device 10 has a manufacturing variation, as shown in FIG. 5B, the maximum displacement amount is partially in the brim portion 17 of the vibrating body 12. Can be seen to be larger. At this time, the maximum displacement amount of the brim portion 17 of the vibrating body 12 is not axisymmetric and is distributed non-uniformly. When the vibrating device 10 has manufacturing variations, the maximum displacement amount of the translucent body cover 11 is 7.91 μm. It should be noted that the manufacturing variation occurs due to the positional deviation when the translucent body cover 11, the vibrating body 12, and the piezoelectric element 13 are adhered, the variation in the thickness of the adhesive, and the like.

As shown in FIG. 6, if there is no manufacturing variation in the vibrating device 10, the maximum displacement amount of the translucent body cover 11 is constant regardless of the number of fixed portions 15. That is, even when the brim portion 17 of the vibrating body 12 is not fixed at all or is fixed over the entire circumference of the brim portion 17, the maximum displacement amount of the translucent body cover 11 does not change.

However, when the vibrating device 10 has manufacturing variations, as shown in FIG. 6, when the vibrating body 12 is fixed over the entire circumference of the brim portion 17 (fully fixed), the maximum displacement amount of the translucent body cover 11 is 4.38 μm. Therefore, the maximum displacement amount is reduced by 45% as compared with the case where it is not fixed. The fact that the maximum displacement amount of the translucent body cover 11 becomes small means that foreign substances such as water droplets adhering to the translucent body cover 11 cannot be properly removed, and the function as the vibrating device 10 deteriorates. means.

On the other hand, when the brim portion 17 of the vibrating body 12 is partially fixed instead of being fixed on the entire surface, that is, when a plurality of fixing portions 15 are arranged at intervals (fixed 2 places to 6 fixed places in FIG. 6). The smaller the number of fixed portions 15, the smaller the decrease in the maximum displacement amount of the translucent body cover 11. Therefore, it can be seen that the decrease in the maximum displacement amount of the translucent body cover 11 can be suppressed by partially pressing the brim portion 17 at intervals.

However, when the number of the fixed portions 15 is two, the vibrating body 12 or the case 14 may come off from the fixed portions 15 due to vibration or impact from the lateral direction (X direction in FIG. 1). Therefore, in order to ensure the reliability of the vibrating device 10, the number of fixed portions 15 is preferably 3 or more and 6 or less.

Next, consider the size of the fixed portion 15. When the fixed portion 15 becomes large, the area of the portion of the first surface 17a of the brim portion 17 of the vibrating body 12 that is pressed by the fixed portion 15 becomes large. In the graph of FIG. 7, when 2 to 6 places are fixed, that is, when the number of fixed parts 15 is 2 to 6, each of them is pressed by the fixed part 15 in the area of the first surface 17a of the brim part 17. The ratio of the area of the part is the fixed place occupancy rate.

When the fixed portion occupancy rate is 0%, that is, when the fixed portion 15 is not arranged, the maximum displacement amount of the translucent body cover 11 is set to 100%, and the function of removing foreign matter adhering to the translucent body cover 11 is maintained. In consideration of this, the maximum displacement amount of the translucent body cover 11 is allowed to be up to 80%.

As shown in FIG. 7, in the case of two fixed locations, the fixed location occupancy rate may be 60% or less. Similarly, in the case of three fixed locations, the fixed location occupancy rate may be 35% or less. In the case of four fixed locations, the fixed location occupancy rate may be 15% or less. In the case of fixed 6 places, the fixed place occupancy rate may be 5% or less.

Considering the above simulation results, reliability such as impact resistance of the vibrating device 10, strength of the fixed portion, etc., the number of the fixed portions 15 is three, and the occupancy rate of the fixed portion is 35% or less. preferable.

[effect]
According to the vibration device 10 according to the first embodiment, the following effects can be obtained.

The vibrating device 10 includes a translucent body cover 11, a vibrating body 12, a piezoelectric element 13, a case 14, and a plurality of fixing portions 15. The vibrating body 12 has a tubular body 16 and a brim portion 17. The tubular body 16 has one end 16a and the other end 16b, and supports the translucent body cover 11 on the one end 16a side. The brim portion 17 has a first surface 17a extending from the other end 16b side of the tubular body 16 to the outside of the side wall 16c of the tubular body 16 and located on the one end 16a side of the tubular body 16. The piezoelectric element 13 is arranged on the vibrating body 12 and vibrates the vibrating body 12. The case 14 is arranged on the other end 16b side of the tubular body 16 and comes into contact with the brim portion 17 of the vibrating body 12. The plurality of fixing portions 15 are arranged at intervals on the first surface 17a of the brim portion 17 of the vibrating body 12, and fix the vibrating body 12 and the case 14.

With such a configuration, it is possible to provide a vibration device 10 with improved vibration efficiency. Specifically, by arranging a plurality of fixing portions 15 on the first surface 17a of the brim portion 17 of the vibrating body 12 at intervals, the displacement amount of the translucent body cover 11 due to pressing the brim portion 17 It is possible to suppress the decrease and improve the vibration efficiency.

Due to manufacturing variations in the vibration device 10, the displacement amount of vibration is unevenly distributed in the brim portion 17. Therefore, the displacement amount of the translucent body cover 11 is compared with the case where the entire surface of the brim portion 17 is fixed by partially fixing the brim portion 17 of the vibrating body 12 with a plurality of fixing portions 15 at intervals. It is possible to suppress the decrease in vibration and improve the vibration efficiency.

The number of the plurality of fixed portions 15 is 3 or more and 6 or less, and the plurality of fixed portions 15 are arranged at equal intervals.

With such a configuration, it is possible to improve the vibration efficiency by suppressing a decrease in the displacement amount of the translucent body cover 11 while maintaining the impact resistance of the vibration device 10.

The number of the plurality of fixed portions is three, and the area of the portion of the first surface 17a of the brim portion 17 of the vibrating body 12 that is pressed by the plurality of fixed portions 15 is the first of the brim portions 17 of the vibrating body 12. It is 35% or less of the area of one surface 17a.

With such a configuration, it is possible to improve the vibration efficiency by suppressing a decrease in the displacement amount of the translucent body cover 11 while maintaining the impact resistance of the vibration device 10 and the strength of the fixing portion 15.

The plurality of fixing portions include a first pressing portion 15a, a second pressing portion 15b, and a connecting portion 15c. The first holding portion 15a is arranged on the first surface of the brim portion 17 of the vibrating body 12. The second pressing portion 15b is located closer to the case 14 than the first pressing portion 15a, and is arranged so as to face the first pressing portion 15a. The connecting portion 15c connects the first pressing portion 15a and the second pressing portion 15b.

With such a configuration, a plurality of fixing portions 15 can be easily attached to the vibrating device 10. Further, depending on the performance of the vibrating device 10, design changes such as changing the number of fixed portions 15 can be easily performed.

In the above-described embodiment, the brim portion 17 of the vibrating body 12 is formed so as to extend from the other end 16b of the tubular body 16 of the vibrating body 12 to the outside of the side wall 16c of the tubular body 16. The portion 17 may be formed so as to extend from the other end 16b of the tubular body 16 to the inside of the side wall 16c. Alternatively, the brim portion 17 may be formed so as to extend to at least one of the outside or the inside of the side wall 16c of the tubular body 16.

Further, in the above-described embodiment, the translucent body cover 11 is formed in a disk shape, but the shape of the translucent body cover 11 is not limited to the disk shape, and is a polygonal plate shape or a dome shape. Any shape may be used as long as it can protect the image pickup unit.

Further, in the above-described embodiment, the tubular body 16 has a cylindrical shape, but the shape of the tubular body is not limited to this. The cylindrical body 16 may have a rectangular tubular shape when viewed from the extending direction of the tubular body 16. Alternatively, the cylindrical body 16 may have a polygonal shape when viewed from the extending direction of the tubular body 16.

Further, in the above-described embodiment, the example in which the brim portion 17 has a spring property has been described, but the brim portion 17 does not necessarily have the spring property.

<Modification example>
In the above-described embodiment, the number of fixed portions 15 is 4, but the number of fixed portions may be 3 or more and 6 or less. A case where the number of fixed portions is three will be described. FIG. 8A is a perspective view showing the vibration device 10A according to the first modification of the first embodiment. 8B is a front view of the vibration device 10A of FIG. 8A.

As shown in FIGS. 8A and 8B, when the number of fixed portions 15 is three, the three fixed portions 15 are evenly spaced so that the angle θ2 is 120 degrees with respect to the center c1 of the translucent body cover 11. Is placed in.

At this time, the sum of the areas of the portions (18a, 18b, 18c in FIG. 9) held by the three fixing portions 15 is 35% or less of the area of the first surface 17a of the brim portion 17 of the vibrating body 12. ..

FIG. 9 is a front view showing the vibration device 10B according to the second modification of the first embodiment. As shown in FIG. 9, four fixed portions 15e to 15h are arranged in the vibrating device 10B, but the four fixed portions 15e to 15h are arranged at different intervals. Specifically, the fixed portion 15e and the fixed portion 15f are arranged at an angle θ3a with respect to the center c1 of the translucent body cover 11. Similarly, with respect to the center c1, the fixed portion 15f and the fixed portion 15g are arranged at an angle θ3b, the fixed portion 15g and the fixed portion 15h are arranged at an angle θ3c, and the fixed portion 15h and the fixed portion 15e are arranged at an angle θ3d. It is arranged in. At this time, the sizes of the angles θ3a to θ3d are different from each other. As described above, the arrangement of the fixed portions does not have to be evenly spaced.

(Embodiment 2)
The vibration device according to the second embodiment of the present invention will be described. In the second embodiment, the points different from the first embodiment will be mainly described. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the second embodiment, the description overlapping with the first embodiment is omitted.

FIG. 10 is a partial cross-sectional view showing the vibration device 110 according to the second embodiment.

The second embodiment is different from the first embodiment in that the plurality of fixing portions 115 have springiness.

In the present embodiment, as shown in FIG. 10, the fixing portion 115 is formed by a leaf spring. The fixing portion 115 sandwiches the brim portion 17 of the vibrating body 12 and the case 14 by the elastic force of the leaf spring, and fixes the vibrating body 12 and the case 14. The fixing portion 115 may have at least an elastic force on the first pressing portion 115a.

In the present embodiment, a metal such as stainless steel, iron, or copper can be used as the material of the leaf spring constituting the fixing portion 115. For stainless steel, for example, SUS304-CSP, which is stainless steel for springs, can be used. The spring elastic modulus of the fixed portion 115 may be 1 × 10 ⁴ N / mm ² or more and 1 × 10 ⁶ N / mm ² or less.

[effect]
According to the vibration device 110 according to the second embodiment, the following effects can be obtained.

The plurality of fixing portions 115 have a spring property.

With such a configuration, the brim portion 17 can be pressed against the case 14 by the elastic force of the first pressing portion 115a of the fixing portion 115 to give springiness and fix. Further, by absorbing the energy of the vibration leakage as the energy of the spring in the fixed portion 115, the energy of the vibration leakage is transmitted to the case to suppress the attenuation of the vibration energy and reduce the influence on the performance of the vibration device 110. can. Further, by changing the spring constant, the spring performance can be easily changed, so that the degree of freedom in design can be improved.

(Embodiment 3)
The vibration device according to the third embodiment of the present invention will be described. In the third embodiment, the points different from the first embodiment will be mainly described. In the third embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the third embodiment, the description overlapping with the first embodiment is omitted.

FIG. 11 is a partial cross-sectional view showing the vibration device 210 according to the third embodiment.

The third embodiment is different from the first embodiment in that the first pressing portion 215a of the plurality of fixed portions 215 has the protruding portion 218.

As shown in FIG. 11, the first holding portion 215a of the fixing portion 215 is provided at the tip of the first holding portion 215a, and the protruding portion 218 protruding toward the first surface 17a of the brim portion 17 of the vibrating body 12 is provided. Have.

The protruding portion 218 has, for example, a block shape, and is a surface facing the first surface 17a of the brim portion 17 and presses the first surface 17a of the brim portion 17. The height of the protruding portion 218 (Z direction) may be, for example, 5% or more and 15% or less of the height (Z direction) of the connecting portion 215c of the fixed portion 215.

By providing the protruding portion 218 at the tip of the first holding portion 215a of the fixing portion 215, it is possible to hold the inner side of the brim portion 17 of the vibrating body 12. By pressing the inside of the brim portion 17, the vibrating body 12 and the case 14 are more firmly fixed.

[effect]
According to the vibration device 210 according to the third embodiment, the following effects can be obtained.

The first holding portion 215a is provided at the tip of the first holding portion 215a and has a protruding portion 218 protruding toward the first surface 17a of the brim portion 17 of the vibrating body 12.

With such a configuration, the area for pressing the brim portion 17 of the vibrating body 12 becomes small, so that the force for pressing the brim portion 17 of the vibrating body 12 becomes large due to the fixing portion 215. Therefore, the vibrating body 12 and the case 14 can be fixed with a larger force, and the impact resistance of the vibrating device 210 can be improved.

Further, by forming the projecting portion 218 on the first holding portion 215a, the contact area between the fixing portion 215 and the first surface 17a of the brim portion 17 of the vibrating body 12 becomes smaller, and the translucent body cover 11 by the fixing portion 215 becomes smaller. Since the decrease in the displacement amount of the vibration device 210 can be suppressed, the vibration performance of the vibration device 210 can be improved.

In the third embodiment, the fixing portion 215 may be formed by a leaf spring. In this case, the protruding portion 218 can be formed by bending the tip of the first holding portion 215a.

(Embodiment 4)
The vibration device according to the fourth embodiment of the present invention will be described. In the fourth embodiment, the points different from the first embodiment will be mainly described. In the fourth embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the fourth embodiment, the description overlapping with the first embodiment is omitted.

FIG. 12 is a partial perspective view showing the vibration device 310 according to the fourth embodiment. FIG. 13 is a partial perspective view showing a process of mounting the fixing portion 315 in the vibration device 310 of FIG. FIG. 14 is a partial perspective view showing a process of mounting the fixing portion 315 in the vibration device 310 of FIG. FIG. 15 is a partial perspective view showing a process of mounting the fixing portion 315 in the vibration device 310 of FIG. FIG. 16 is a partial perspective view showing a process of mounting the fixing portion 315 in the vibration device 310 of FIG.

In the fourth embodiment, the shapes of the brim portion 317, the case 314, and the fixed portion 315 of the vibrating body 312 are different from those of the first embodiment.

As shown in FIG. 12, the brim portion 317 of the vibrating body 312 has a first surface 317a, a second surface 317b facing the first surface 317a, and a side surface of the brim portion connecting the first surface 317a and the second surface 317b. It has 317c and. Further, a notch on the side of the brim 317d (see FIG. 13) is formed on the side surface 317c of the brim.

The case 314 includes a third surface 314a located on the brim 317 side of the case 314, a fourth surface 314b facing the third surface 314a, and a case side surface 314c connecting the third surface 314a and the fourth surface 314b. Has. Further, the case side notch 314d (see FIG. 13) is formed on the case side surface 314c so as to communicate with the brim side notch 317d. The case 314 further has a plurality of stoppers 319 (see FIG. 13) projecting from the fourth surface 314b on the side opposite to the brim 317 of the vibrating body 312.

When the second pressing portion 315b comes into contact with the stopper 319, the movement of the fixing portion 315 in the direction along the brim portion side surface 317c and the case side surface 314c is restricted.

The connecting portion 315c of the fixing portion 315 is arranged along the side surface of the brim portion 317c and the side surface of the case 314c.

A method of mounting the fixing portion 315 to the vibrating device 310 will be described with reference to FIGS. 13 to 16. As shown in FIGS. 13 and 14, the fixing portion 315 is inserted into the brim portion 317 from the Z direction so that the second holding portion 315b of the fixing portion 315 is inserted into the brim portion side notch 317d and the case side notch 314d. Get closer. The brim side notch 317d and the case side notch 314d are formed larger than the second holding portion 315b so that the second holding portion 315b of the fixing portion 315 can be inserted into the brim side notch 317d and the case side notch 314d. Will be done.

As shown in FIG. 15, the fixing portion 315 is moved until the first holding portion 315a of the fixing portion 315 comes into contact with the first surface 317a of the brim portion 317 of the vibrating body 312. Next, as shown in FIG. 16, the fixing portion 315 is moved in the direction of the arrow A1 to bring the second holding portion 315b into contact with the stopper 319 of the case 314. By bringing the second holding portion 315b into contact with the stopper 319, the movement of the fixing portion 315 is restricted.

In the present embodiment, as shown in FIGS. 15 and 16, three second pressing portions 315b are formed in the fixing portion 315, but at least one second pressing portion 315b is formed in the fixed portion 315. It suffices if it is formed.

The brim side notch 317d and the case side notch 314d may be formed in a number corresponding to the number of the second pressing portions 315b formed in the fixed portion 315 and the fixed portion 315. Similarly, the number of stoppers 319 may be formed according to the number of the fixing portions 315 and the second pressing portions 315b formed on the fixing portions 315.

[effect]
According to the vibration device 310 according to the fourth embodiment, the following effects can be obtained.

The brim portion 317 has a second surface facing the first surface 317a of the brim portion, and a brim portion side surface 317c connecting the first surface 317a and the second surface 317b. A plurality of notches on the side of the brim, which are larger than the second holding portion 315b, are formed on the side surface of the brim 317c. The case 314 includes a third surface 314a located on the brim 317 side of the case 314, a fourth surface 314b facing the third surface 314a, and a case side surface 314c connecting the third surface 314a and the fourth surface 314b. Has. The case side surface 314c is formed with a plurality of case-side notches 314d that communicate with a plurality of brim-side notches 317d of the brim portion 317 and are larger than the second holding portion 315b. The case 314 has a plurality of stoppers 319, which project from the fourth surface 314b on the side opposite to the brim portion 317. The connecting portion 315c of the plurality of fixing portions 315 is arranged along the brim portion side surface 317c and the case side surface 314c. The plurality of stoppers 319 are in contact with the second holding portion 315b to restrict the movement of the plurality of fixing portions 315 in the direction along the brim portion side surface 317c and the case side surface 314c.

With such a configuration, the fixing portion 315 can be easily incorporated into the vibration device 310. Further, the maintainability of the vibration device 310 can be improved.

(Embodiment 5)
The vibration device according to the fifth embodiment of the present invention will be described. In the fifth embodiment, the points different from the first embodiment will be mainly described. In the fifth embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the fifth embodiment, the description overlapping with the first embodiment is omitted.

FIG. 17 is a perspective view showing the vibration device 410 according to the fifth embodiment. FIG. 18 is a cross-sectional view of the vibration device 410 of FIG.

The fifth embodiment is different from the first embodiment in that the second pressing portion 415b of the fixing portion 415 and the case 414 are integrally molded.

As shown in FIGS. 17 and 18, the second holding portions 415b of the plurality of fixing portions 415 are embedded inside the case 414. The second pressing portion 415b of the plurality of fixing portions 415 can be embedded inside the case 414 by, for example, insert molding.

FIG. 19 is a diagram showing an example of an assembly method of the vibration device 410 of FIG. A case 414 in which the second holding portion 415b of the fixing portion 415 having the second holding portion 415b and the connecting portion 415c is embedded is prepared. The case 414 in which the second pressing portion 415b is embedded can be formed, for example, by insert molding.

After arranging the vibrating body 12 in which the translucent body cover 11 is arranged in the case 414, as shown in FIG. 19, the tip of the connecting portion 415c is directed toward the brim portion 17 of the vibrating body 12, that is, in the direction of the arrow A2. Bend. The bent tip of the connecting portion 415c becomes the first holding portion 415a (see FIG. 18), and the vibration device 410 of FIG. 17 is completed.

The vibrating body 412 may be fitted into the case 414 in a state where the first holding portion 415a of the fixing portion 415 is bent before arranging the vibrating body 412.

[effect]
According to the vibration device 410 according to the fifth embodiment, the following effects can be obtained.

The second pressing portion 415b of the plurality of fixing portions 415 is embedded inside the case 414.

With such a configuration, the vibration device 410 can be easily assembled and the manufacturing cost can be reduced. Further, since the second pressing portion 415b of the fixing portion 415 is embedded in the case 414 and integrally molded, the number of parts can be reduced. In addition, it is possible to prevent the fixing portion 415 from falling off due to vibration.

<Modification example>
FIG. 20 is a perspective view showing the vibration device 510 according to the first modification of the fifth embodiment. FIG. 21 is a cross-sectional view of the vibration device 510 of FIG.

As shown in FIG. 21, the brim portion 517 of the vibrating body 512 may be formed so as to extend from the other end 516b of the tubular body 516 of the vibrating body 512 to the inside of the side wall 516c. In this case, since the fixing portion 515 is arranged inside the case, the fixing portion 515 is not exposed to the outside of the vibrating device 510 as shown in FIG.

Since the brim portion 517 is formed so as to extend inside the side wall 516c of the tubular body 516, the vibration device 510 can be miniaturized.

FIG. 22 is a perspective view showing the vibration device 610 according to the second modification of the fifth embodiment. FIG. 23 is a diagram for explaining an example of an assembly method of the vibration device 610 of FIG. 22. FIG. 24 is a diagram for explaining an example of an assembly method of the vibration device 610 of FIG. 22.

As shown in FIG. 22, the brim portion 617 of the vibrating body 612 may be formed with a plurality of notches 617d larger than the plurality of fixed portions 615.

As shown in FIGS. 23 and 24, the notch 617d formed in the brim portion 617 of the vibrating body 612 is aligned with the position of the fixing portion 615 arranged in the case 614, and the vibrating body 612 is arranged in the case 614. do. After that, as shown in FIG. 24, the vibrating body 612 is rotated in the direction of the arrow A3 to fix the vibrating body 612 and the case 614, thereby completing the vibrating device 610.

With such a configuration, the case 614 and the vibrating body 612 can be easily assembled, so that maintainability is improved. Further, since the number of parts of the vibration device 610 can be reduced, the manufacturing cost can be reduced.

FIG. 25 is a cross-sectional view showing the vibration device 410A according to the third modification of the fifth embodiment. As shown in FIG. 25, the brim portion 27 and the fixing portion 25 of the vibrating body 22 may be integrally molded. More specifically, the brim portion 27 of the vibrating body 22 is formed so as to extend to the outside of the tubular body 26, and the connecting portion 25c of the fixing portion 25 is embedded inside the brim portion 27. In this case, the brim portion 27 and the case 24 can be sandwiched and fixed by the first pressing portion 25a and the second pressing portion 25b of the fixing portion 25.

(Embodiment 6)
The vibration device according to the sixth embodiment of the present invention will be described. In the sixth embodiment, the points different from the first embodiment will be mainly described. In the sixth embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the sixth embodiment, the description overlapping with the first embodiment is omitted.

FIG. 26 is a partial cross-sectional view of the vibration device 710 according to the sixth embodiment.

The sixth embodiment is different from the first embodiment in that the vibrating device 710 includes a sealing member 721 at a portion where the brim portion 17 of the vibrating body 12 and the case 714 come into contact with each other.

In the vibrating device 710, the seal member 721 is arranged at the portion where the brim portion 17 and the case 714 come into contact with each other. As shown in FIG. 26, the portion where the brim portion 17 and the case 714 are in contact with each other is a portion where the second surface 17b of the brim portion 17 and the third surface 714a of the case 714 are in contact with each other. In the present embodiment, the groove 714e is formed on the third surface 14a of the case 714, and the seal member 721 is arranged in the groove 714e. By arranging the seal member 721 in this way and fixing the brim portion 17 of the vibrating body 12 and the case 714 with the fixing portion 15, the seal member 721 is compressed and the waterproof performance of the vibrating device 710 can be improved. can.

As the seal member 721, for example, an O-ring or the like can be used. Further, as the material of the seal member 721, a material having elasticity such as rubber can be used. As the material of the sealing member 721, for example, NBR (nitrile rubber), silicon, fluorine-based, urethane-based, or the like can be used.

[effect]
According to the vibration device 710 according to the sixth embodiment, the following effects can be obtained.

The vibrating device 710 includes a sealing member 721 arranged at a portion where the brim portion 17 of the vibrating body 12 and the case 714 come into contact with each other.

With such a configuration, it is possible to provide a vibration device 710 having waterproofness. By arranging the seal member 721 in the portion where the brim portion 17 and the case 714 come into contact with each other, it contributes to the miniaturization of the vibration device 710.

<Modification example>
FIG. 27 is a partial cross-sectional view showing a vibration device 810 according to a modified example of the sixth embodiment. As shown in FIG. 27, the seal member 821 is arranged along the brim portion 17 in the groove 814e formed on the third surface 814a of the case 814. By arranging the seal member 821 in this way, the seal member 821 is compressed by the brim portion 17 in the direction of the arrow A4. By compressing the seal member 821 in this way, the waterproof performance of the vibrating device 810 can be improved.

(Embodiment 7)
The vibration device according to the seventh embodiment of the present invention will be described. In the seventh embodiment, the points different from the first embodiment will be mainly described. In the seventh embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals. Further, in the seventh embodiment, the description overlapping with the first embodiment is omitted.

FIG. 28 is a partial perspective view showing the vibration device 910 according to the seventh embodiment.

The seventh embodiment is different from the first embodiment in that the fixing portion 915 is formed on the ring-shaped member 922.

As shown in FIG. 28, the vibrating device 910 includes a ring-shaped member 922 arranged along the brim portion 17 and the case 914. The ring-shaped member 922 has a height (Z direction) equal to or greater than the thickness of the brim portion 17 of the vibrating body 12 and the case 14.

The plurality of fixing portions 915 are formed so as to extend from the end portion 922a on the brim portion 17 side of the ring-shaped member 922 toward the brim portion 17. The fixing portion 915 has a first holding portion 915a extending inward from the end portion 922a of the ring-shaped member 922. As shown in FIG. 28, the fixing portion 915 may have a protruding portion 918 at the tip of the first holding portion 915a. The protruding portion 918 is formed in a block shape, for example, and presses the brim portion 17 on a surface facing the brim portion 17.

The ring-shaped member 922 has a first screw portion (not shown) formed on the inner wall 922b along the case 914. Further, the case 914 has a portion in contact with the inner wall of the ring-shaped member 922, that is, a second screw portion (not shown) formed on the case side surface 914c and screwed with the first screw portion. By screwing the first screw portion and the second screw portion, the case 914 and the ring-shaped member 922 can be fixed. By fixing the case 914 and the ring-shaped member 922, the fixing portion 915 is in a state of pressing the brim portion 17 of the vibrating body 12.

[effect]
According to the vibration device 810 according to the seventh embodiment, the following effects can be obtained.

The vibrating device 910 includes a ring-shaped member 922 arranged along the brim portion 17 and the case 914. The plurality of fixing portions 915 are formed so as to extend from the end portion 922a on the brim portion 17 side of the ring-shaped member 922 toward the brim portion 17. In the present embodiment, the ring-shaped member 922 and the fixing portion 915 are integrally formed of the same material. Further, the ring-shaped member 922 has a first screw portion formed on the inner wall 922b along the case 914.

With such a configuration, a plurality of fixed portions can be easily arranged in the vibrating device. If a plurality of fixing portions 915 are formed on the ring-shaped member 922, the plurality of fixing portions 915 can be arranged at the same time by screwing the first screw portion and the second screw portion.

In the above-described embodiment, an example in which the ring-shaped member 922 and the fixing portion 915 are integrally formed of the same material has been described, but the ring-shaped member 922 and the fixing portion 915 are not necessarily formed of the same material. It does not have to be. For example, the ring-shaped member may be made of resin and the fixing portion 915 may be a leaf spring.

Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various modifications and modifications are obvious to those skilled in the art. It should be understood that such modifications and modifications are included within the scope of the invention as long as it does not deviate from the scope of the invention according to the appended claims.

The vibration device of the present invention can be applied to an in-vehicle camera, a surveillance camera, or an optical sensor such as LiDAR used outdoors.

10, 10A, 110, 210, 310, 410, 510, 610, 710, 810, 910 Vibrating device 11

Translucent body cover

12, 22, 312, 412, 512, 612 Vibrating body 13

Piezoelectric element

14, 24, 314, 414, 614, 714, 814, 914

Case

14a, 314a, 714a, 814a 3rd surface 314b

4th surface

314c, 914c Case side surface 314d

Case side notches

15, 15e to 15h, 25, 115, 215, 315, 415, 515, 615, 915,

Fixed part

15a, 115a, 215a, 315a, 415a, 915a First holding

part

15b, 315b, 415b

Second holding part

15c, 215c, 315c,

415c Connection part

16, 26, 516 Cylindrical body 16a One

end

16b, 516b The

other end

16c,

516c Side wall

17, 27, 317, 517, 617

Brim part

17a, 317a

First surface

17b, 317b Second surface 317c Brim side side 317d

Brim side notch

218, 918 Protruding part 319

Stopper

721, 821 Seal member 922 Ring-shaped member 922a End 922b Inner wall

Claims

With a translucent body cover,
A tubular body having one end and the other end and supporting the translucent body cover on the one end side, and at least one of the outside or the inside of the side wall of the tubular body from the other end side of the tubular body. A vibrating body that extends and has a brim having a first surface located on the one end side of the tubular body.
A piezoelectric element arranged on the vibrating body and vibrating the vibrating body,
A case arranged on the other end side of the tubular body and in contact with the brim portion of the vibrating body, and a case.
A plurality of fixing portions, which are arranged at intervals on the first surface of the brim portion of the vibrating body and fix the vibrating body and the case,
To prepare
Vibration device.
The number of the plurality of fixed portions is 3 or more and 6 or less.
The plurality of fixing portions are arranged at equal intervals.
The vibration device according to claim 1.
The number of the plurality of fixed portions is three.
The area of the portion of the first surface of the brim of the vibrating body that is pressed by the plurality of fixing portions is 35% or less of the area of the first surface of the brim of the vibrating body.
The vibration device according to claim 2.
The plurality of fixing portions have a spring property.
The vibrating device according to any one of claims 1 to 3.
The plurality of fixing portions are located on the case side of the first pressing portion and the first pressing portion arranged on the first surface of the brim portion of the vibrating body and face the first pressing portion. It has a second holding portion arranged so as to be, and a connecting portion connecting the first holding portion and the second holding portion.
The vibrating device according to any one of claims 1 to 4.
The first holding portion is provided at the tip of the first holding portion and has a protruding portion protruding toward the first surface of the brim portion of the vibrating body.
The vibration device according to claim 5.
The brim portion has a second surface facing the first surface of the brim portion and a side surface of the brim portion connecting the first surface and the second surface, and the side surface of the brim portion has the first surface. 2 Multiple brim side notches larger than the holding part are formed,
The case has a third surface located on the brim side of the case, a fourth surface facing the third surface, and a case side surface connecting the third surface and the fourth surface. ,
On the side surface of the case, a plurality of case-side notches larger than the second holding portion are formed so as to communicate with the plurality of brim-side notches of the brim.
The case has a plurality of stoppers that project from the fourth surface to the opposite side of the brim.
The connecting portion of the plurality of fixing portions is arranged along the side surface of the brim portion and the side surface of the case.
The plurality of stoppers abut on the second holding portion to restrict the movement of the plurality of fixing portions in the direction along the side surface of the brim portion and the side surface of the case.
The vibrating device according to claim 5 or 6.
The second pressing portion of the plurality of fixing portions is embedded inside the case.
The vibrating device according to claim 5 or 6.
A plurality of notches larger than the plurality of fixed portions are formed in the brim portion of the vibrating body.
The vibration device according to claim 8.
moreover,
A ring-shaped member arranged along the brim and the case,
Equipped with
The plurality of fixing portions are formed so as to extend from the end portion of the ring-shaped member on the brim portion side toward the brim portion.
The ring-shaped member has a first threaded portion formed on an inner wall along the case.
The case has a second threaded portion, which is formed in a portion of the ring-shaped member in contact with the inner wall and is screwed with the first threaded portion.
The vibrating device according to any one of claims 1 to 4.
moreover,
A sealing member arranged at a portion where the brim portion of the vibrating body and the case come into contact with each other.
To prepare
The vibrating device according to any one of claims 1 to 10.