SWIMMING DEVICE

Abstract

A vibrating device is provided that enables the removal of foreign bodies adhering to a translucent body. A vibrating device according to the present invention comprises a substantially cylindrical internal vibrating body capable of amplifying vibrations and extending in a first direction, a piezoelectric element connected at one end in the first direction to the internal vibrating body and capable of generating vibrations, a translucent body connected at the other end in the first direction to the internal vibrating body and having an optical axis extending along the first direction, and a substantially cylindrical external vibrating body provided to surround the internal vibrating body and extending in the first direction.The external vibrating body comprises a first connecting part that is connected to the translucent body, a damping part that extends from the first connecting part to the outside of the translucent body along a second direction intersecting with the first direction and configured to dampen vibrations, and a cylindrical part that is connected to the first connecting part and the damping part and extends along the first direction. The cylindrical part is located at a gap from the internal vibrating body in the second direction, and at least one of the damping part and the cylindrical part is not axially symmetric with respect to the optical axis.

Description

Technical field

[0001] The present invention relates to a vibrating device. Background technology

[0002] Patent document 1 describes a vibrating device comprising a non-equilibrium device for partially reducing mass from or adding mass to at least one of a transparent body, a first tubular body, a second tubular body, a spring or a vibrating element. Reference list patent document

[0003] Patent document 1: Japanese patent no. 6819846 Brief description of the invention: Technical problem

[0004] The oscillating device in patent document 1 has room for improvement with regard to the removal of foreign bodies adhering to a translucent body.

[0005] The object of the present invention is to create a vibrating device capable of removing foreign bodies adhering to a translucent body. Solution to the problem

[0006] A vibration device according to one aspect of the present invention comprises a substantially tubular internal vibration element capable of amplifying vibrations and extending in a first direction; a piezoelectric element connected to a first end section of the internal vibration element in the first direction and capable of generating vibrations; a translucent body connected to a second end section of the internal vibration element in the first direction and having an optical axis extending in the first direction;and an essentially tubular external oscillating element arranged to surround the internal oscillating element and extending in the first direction, wherein the external oscillating element comprises a first connector connected to the translucent body, a damper extending from the first connector in a direction away from the translucent body in a second direction intersecting the first direction to dampen vibrations, and a cylindrical section connecting the first connector and the damper and extending in the first direction, the cylindrical section being arranged at a distance from the internal oscillating element in the second direction, and wherein at least one of the damper or the cylindrical section has non-axial symmetry with respect to the optical axis. Advantageous effects of the invention

[0007] The present invention can provide a vibrating device capable of removing foreign bodies adhering to a translucent body. Brief description of the drawings Fig. Figure 1 is a schematic perspective view of a oscillating device according to an embodiment of the present invention. Fig. Figure 2 is a schematic cross-sectional view along line II-II in Fig. 1. Fig. Figure 3 is a schematic perspective view of the oscillating device in Fig. 1 when viewed from below. Fig. Figure 4 is a schematic perspective view of an external vibration element in the vibration device in Fig. 1. Fig. Figure 5 is a schematic cross-sectional view along line VV in Fig. 4. Fig. Figure 6A is a schematic cross-sectional view of the external vibration element in the vibration device in Fig. 1 without a fixed section. Fig. 6B is a schematic bottom view of the external vibration element located in Fig. Figure 6A illustrates this without a fixed section. Fig. 6C is a schematic cross-sectional view along the VIC-VIC line in Fig. 6A. Fig. Figure 7 is a schematic perspective cross-sectional view of an example arrangement of a vibration device. Fig. Figure 8 is a diagram of an example of a displacement degree of a lens surface of the oscillating device in Fig. 1. Fig. 9A is a schematic cross-sectional view of an example of a natural frequency of an internal oscillating element in the oscillating device in Fig. 1. Fig. Figure 9B is a schematic cross-sectional view of an example of a natural frequency (mode A) of an external oscillating element in the oscillating device in Fig. 1. Fig. Figure 9C is a schematic cross-sectional view of an example of a natural frequency (mode B) of the external oscillating element in the oscillating device in Fig. 1. Fig. Figure 10A is a schematic cross-sectional view of another example of the external vibration element without the fixed section. Fig. Figure 10B is a schematic bottom view of the external vibration element without the fixed section in Fig. 10A. Fig. Figure 11 is a schematic cross-sectional view of a vibrating device according to a first modification example. Fig. Figure 12A is a schematic cross-sectional view of an external vibration element in the vibration device in Fig. 11 without a fixed section. Fig. 12B is a cross-sectional view along line XIIB-XIIB in Fig. 12A. Fig. Figure 13 is a schematic perspective view of an example arrangement of the oscillating device in Fig. 11. Fig. Figure 14 is a diagram of an example of a displacement degree of the lens surface of the oscillating device in Fig. 11. Fig. Figure 15 is a schematic cross-sectional view of a vibrating device according to a second modification example. Fig. Figure 16 is a diagram of an example of the degree of displacement of the lens surface of the oscillating device in Fig. 15. Fig. Figure 17 is a schematic perspective view of a oscillating device according to a third variation example. Fig. 18 is a schematic cross-sectional view along the line XVIII-XVIII in Fig. 17. Description of exemplary implementations

[0008] Various embodiments of the present invention are described.

[0009] A vibration device according to a first aspect of the present invention comprises the following features: an essentially tubular internal oscillating element capable of amplifying vibrations and extending in a first direction; a piezoelectric element that is connected to a first end section of the internal oscillating element in the first direction and is capable of generating oscillations; a translucent body connected to a second end section of the internal oscillating element in the first direction and having an optical axis extending in the first direction; and an essentially tubular external oscillating element arranged to surround the internal oscillating element and extending in the first direction, the external vibration element comprises the following features: a first connector that is connected to the translucent body, a damping element extending from the first connector in one direction away from the translucent body in a second direction that intersects the first direction to dampen vibrations, and a cylindrical section that connects the first connector and the damping element and extends in the first direction, wherein the cylinder section is arranged at a distance from the internal oscillating element in the second direction and wherein at least one of the damping element or the cylinder section exhibits non-axial symmetry with respect to the optical axis.

[0010] A vibrating device according to a second aspect of the present invention is dependent on the vibrating device according to the first aspect, wherein, in a cross-section along the optical axis, The attenuator comprises a first attenuator and a second attenuator that are positioned symmetrically with respect to the optical axis, and the thickness of the first attenuator differs from the thickness of the second attenuator in the first direction.

[0011] A vibration device according to a third aspect is dependent on the vibration device according to the first or second aspect, wherein, in a cross-section along the optical axis, the cylinder section comprises a first cylinder section and a second cylinder section, which are positioned symmetrically with respect to the optical axis, and the thickness of the first cylinder section differs in the second direction from the thickness of the second cylinder section in the second direction.

[0012] A vibrating device according to a fourth aspect is dependent on the vibrating device according to the third aspect. wherein the cylindrical section comprises a first component and a second component, wherein the first cylindrical section is formed from a section of the first component, wherein the second cylindrical section is formed from another section of the first component and the second component, wherein the second component is positioned in the second cylinder section within the first component.

[0013] A vibrating device according to a fifth aspect is dependent on the vibrating device according to one of the first to fourth aspects. where both the damping element and the cylinder section exhibit non-axial symmetry with respect to the optical axis.

[0014] A vibrating device according to a sixth aspect is dependent on the vibrating device according to the fifth aspect. wherein, in a cross-section along the optical axis, The attenuator comprises a first attenuator and a second attenuator, which are positioned symmetrically with respect to the optical axis. the cylinder section comprises a first cylinder section and a second cylinder section that are positioned symmetrically with respect to the optical axis, the first attenuator and the first cylinder section are positioned on a first side of the optical axis and the second attenuator and the second cylinder section are positioned on a second side of the optical axis, the thickness of the first attenuator in the first direction is greater than the thickness of the second attenuator in the first direction, and The thickness of the first cylinder section in the second direction is smaller than the thickness of the second cylinder section in the second direction.

[0015] A vibration device according to a seventh aspect is dependent on the vibration device according to one of the first to sixth aspects. wherein, in a cross-section along the optical axis, the attenuator comprises a first attenuator and a second attenuator which are positioned symmetrically with respect to the optical axis, and where the first damping element and the second damping element are made of different materials.

[0016] A vibration device according to an eighth aspect is dependent on the vibration device according to one of the first to seventh aspects. wherein, in a cross-section along the optical axis, the cylinder section comprises a first cylinder section and a second cylinder section which are positioned symmetrically with respect to the optical axis, and where the first cylinder section and the second cylinder section are made of different materials.

[0017] A vibrating device according to a ninth aspect is dependent on the vibrating device according to one of the first to eighth aspects. wherein, in a cross-section along the optical axis, the external oscillating element comprises a first external oscillating element and a second external oscillating element which are positioned symmetrically with respect to the optical axis, and wherein if the amplitude of the first external oscillating element caused by vibrations generated by the piezoelectric element is greater than the amplitude of the second external oscillating element caused by vibrations generated by the piezoelectric element, the second external oscillating element is positioned higher in a vertical direction than the first external oscillating element.

[0018] A vibrating device according to a tenth aspect is dependent on the vibrating device according to one of the first to ninth aspects. wherein the internal oscillating element has axial symmetry with respect to the optical axis.

[0019] A vibrating device according to an eleventh aspect is dependent on the vibrating device according to one of the first to tenth aspects. the piezoelectric element has axial symmetry with respect to the optical axis.

[0020] A vibrating device according to a twelfth aspect is dependent on the vibrating device according to one of the first to eleventh aspects. wherein, in a cross-section along the optical axis, the external oscillating element comprises a first external oscillating element and a second external oscillating element which are positioned symmetrically with respect to the optical axis, and wherein, if the amplitude of the first external oscillating element caused by vibrations generated by the piezoelectric element is greater than the amplitude of the second external oscillating element caused by vibrations generated by the piezoelectric element, a wire is connected to the piezoelectric element at a position closer to the second external oscillating element than to the first external oscillating element.

[0021] Exemplary embodiments of the present disclosure are described below with reference to the drawings. The present disclosure is not limited to these exemplary embodiments. Throughout the drawings, components that are substantially the same are identified by the same reference numerals. For illustrative purposes, the dimensions of each component in the drawings may be exaggerated and need not be to scale.

[0022] For the sake of simplicity, terms indicating directions such as "top", "bottom", "right", "left" and "side" are used below under the assumption of normal usage, but not, for example, to limit the use of a vibrating device according to the present disclosure.

[0023] In the drawings described below, an X-axis and a Z-axis, perpendicular to each other, are schematically illustrated for reference purposes. In the description below, a simple description of an X-direction or a Z-direction indicates the corresponding axis direction and includes two opposite directions (for example, a -X-direction and a +X-direction).

[0024] Fig. Figure 1 is a perspective view of a oscillating device according to an embodiment of the present invention. Fig. 2 is a cross-sectional view along line II-II in Fig. 1. Fig. Figure 3 is a perspective view of the oscillating device in Fig. 1 when viewed from below. In these drawings, a direction parallel to an optical axis L of a translucent body in a vibrating device is defined as a Z-direction (or a first direction), and a radial direction of an imaginary circle centered on the optical axis L, on the plane perpendicular to the Z-direction, is defined as an X-direction (or a second direction).

[0025] As in Fig. 1 to Fig. As illustrated in Figure 3, a vibrating device 1 comprises an internal vibrating element 7, a piezoelectric element 9, a lens (an example of a translucent body) 5 and an external vibrating element 3. <Internes Schwingelement 7>

[0026] As in Fig. As illustrated in Figure 2, the internal oscillating element 7 is essentially a tubular body extending in the first direction Z. The piezoelectric element 9 is connected to a first end section (a lower end section in Fig. 2) of the internal oscillating element 7 in the first direction Z. The lens 5 is connected to a second end section (an upper end section in Fig. 2) of the internal oscillating element 7 in the first direction Z. The lens 5 has an optical axis L extending in the first direction Z. Vibrations generated by the piezoelectric element 9 are transmitted to the lens 5 via the internal oscillating element 7, causing the lens 5 to vibrate. This removes foreign matter, such as water droplets or mud, adhering to the lens 5.

[0027] The internal oscillating element 7 is capable of amplifying vibrations generated by the piezoelectric element 9. The internal oscillating element 7 is made of, for example, a metal or ceramic material. Examples of metal materials used for the internal oscillating element 7 include stainless steel, aluminum, iron, titanium, and duralumin. The surface of the internal oscillating element 7 can be treated, for example, with oxidation or anodization to improve the adhesion of an adhesive. For example, blackening the surface of the internal oscillating element 7 through a surface treatment can reduce the deterioration of optical characteristics caused by irregular light reflection.

[0028] In the present embodiment, the internal oscillating element 7 has, for example, a substantially tubular shape extending in the first direction Z and positioned symmetrically with respect to the optical axis L. The internal oscillating element 7 comprises an upper section 71, which is in contact with the lens 5, a lower section 72 to which the piezoelectric element 9 is attached, and an intermediate section 73 connecting the upper section 71 and the lower section 72.

[0029] The upper section 71 comprises a cylindrical plate section 711 and a projection 712 that extends from the plate section 711 towards the optical axis L in a second direction X, which intersects the first direction Z. The projection 712 has, for example, an annular shape when viewed from above in the first direction Z. A rim section (a lower rim section) of the lens 5 is supported by the inner surface of the plate section 711 and the upper surface of the projection 712. More precisely, the lower surface of the lens 5 at the lower rim section of the lens 5 is in contact with the upper surface of the projection 712, and the side surface of the lens 5 is in contact with the inner surface (an inner circumference) of the plate section 711. The lower section 72 vibrates along with the vibrations of the piezoelectric element 9 and is thicker than the upper section 71 and the intermediate section 73.This structure transmits vibrations of the piezoelectric element 9 more efficiently to the lens 5. The intermediate section 73 has an essentially S-shaped cross-sectional form. The intermediate section 73 supports the upper section 71 and transmits vibrations of the lower section 72 to the upper section 71.

[0030] The upper section 71, the lower section 72, and the intermediate section 73 can be integrated together or formed separately. The maximum dimension (hereinafter referred to as the "maximum profile dimension") of the intermediate section 73 in the second direction X is larger than the maximum profile dimension of the upper section 71, and the maximum profile dimension of the lower section 72 is larger than the maximum profile dimension of the intermediate section 73. This structure can therefore efficiently transmit vibrations of the piezoelectric element 9 to the lens 5. <Externes Schwingelement 3>

[0031] The external vibration element 3 reduces the transmission of vibrations from the internal vibration element 7 to components other than the lens 5, thus efficiently transferring vibrations to the lens 5. For example, the external vibration element 3 covers the entire internal vibration element 7 to protect it from external influences. The external vibration element 3 is made, for example, of a metallic material such as stainless steel, aluminum, iron, titanium, or duralumin, or of resin.

[0032] Fig. Figure 4 is a schematic perspective view of an external vibration element in the vibration device in Fig. 1. Fig. Figure 5 is a schematic cross-sectional view along line VV in Fig. 4.

[0033] As in Fig. 1 to Fig. As illustrated in Figure 5, the external vibration element 3 is essentially a tubular body extending in the first direction Z. The external vibration element 3 has a through-hole extending continuously in the first direction Z and having a circular cross-section. The external vibration element 3 is arranged to surround the internal vibration element 7. More precisely, the internal vibration element 7 is positioned within the through-hole in the external vibration element 3.

[0034] As in Fig. 2 and Fig. As illustrated in Figure 4, the external oscillating element 3 comprises an essentially cylindrical upper tubular body 41 and an essentially prismatic (here essentially quadrilateral prism-shaped) lower tubular body 42. The upper tubular body 41 is positioned above the lower tubular body 42 (positioned closer to the lens 5). The maximum profile dimension of the upper tubular body 41 is smaller than the maximum profile dimension of the lower tubular body 42.

[0035] In the present embodiment, the external vibration element 3 comprises a first connector 31, a cylindrical section 32, a damping element 33, a second connector 34, and a fixed section 35. The first connector 31, the cylindrical section 32, the damping element 33, the second connector 34, and an upper section 351 in the fixed section 35 are cylindrical and form the upper tubular body 41. A lower section 352 in the fixed section 35 forms the lower tubular body 42.

[0036] The first connector 31 is connected to the lens 5. In the present embodiment, the first connector 31 is positioned at the upper end of the external oscillating element 3 and has a cylindrical shape extending in the first direction Z. As in Fig. As illustrated in Figure 2, the inner surface (inner circumferential surface) of the first connector 31 is in contact with the outer surface (outer circumferential surface) of the internal vibration element 7. The first connector 31 is connected to the lens 5, with the internal vibration element 7 positioned between them. The first connector 31 can be fixed to the lens 5 by any method, regardless of whether the internal vibration element 7 is positioned between them or not (for example, by simply using an adhesive).

[0037] In the Fig. In the illustrated example 2, the outer surface of the first connector 31 is covered by a cover element 8. The cover element 8 covers the outer surface and the upper surface of the first connector 31, the upper end section (the upper surface of the plate section 711) of the internal vibration element 7, and the edge section of an upper surface 53 of the lens 5. The cover element 8 is, for example, a resin element or a metal element. When the cover element 8 is arranged to connect the first connector 31 and the lens 5, the first connector 31 and the lens 5 are more securely connected, and it is less likely that water or foreign matter will enter the external vibration element 3 at the lens 5.

[0038] The cylindrical section 32 is positioned below the first connector 31 (closer to the piezoelectric element 9). The cylindrical section 32 is positioned between the first connector 31 and the damping element 33 in the first direction Z to connect the first connector 31 and the damping element 33. The cylindrical section 32 has a cylindrical shape extending in the first direction Z. As shown in Fig. As illustrated in Figure 2, the cylindrical section 32 is arranged in the cross-section along the optical axis L such that it surrounds the outer periphery of the internal oscillating element 7 at a distance from the internal oscillating element 7 in the second direction (radial direction) X. The inner diameter of the cylindrical section 32 is larger than the inner diameter of the first connector 31. Therefore, a step is formed on the inner surface of the external oscillating element 3, and a gap is formed between the cylindrical section 32 and the outer surface of the internal oscillating element 7. The cylindrical section 32 has a smaller thickness than the fixed section 35 and therefore exhibits spring-like characteristics. The cylindrical section 32 may have an inclined section where the diameter gradually increases towards the damping element 33.

[0039] The damping element 33 extends from the lower end section of the cylindrical section 32 to the outer surface of the lens 5 in the second direction X. The damping element 33 dampens vibrations generated by the piezoelectric element 9. The damping element 33 has a smaller thickness than the fixed section 35 and therefore exhibits spring-like characteristics. The damping element 33 is arranged to surround the outer periphery of the internal oscillating element 7 at a distance from the internal oscillating element 7 in the second direction X. The upper surface of the damping element 33, for example, has an annular shape and is positioned symmetrically with respect to the optical axis L.

[0040] In the present embodiment, the damping element 33 and the cylindrical section 32 in the external oscillating element 3 exhibit non-axial symmetry with respect to the optical axis L. This structure can vary the amplitude of the lens 5, which is connected to the first connector 31 in the external oscillating element 3, during vibration. A specific non-axially symmetric structure will be described later. In the present disclosure, "varying the amplitude of the lens 5" refers to the formation, on the upper surface 53 of the lens 5, of a region in which the lens 5 vibrates with a large amplitude and a region in which the lens 5 vibrates with a small amplitude.

[0041] The second connector 34 connects the damping element 33 and the fixed section 35. The second connector 34 has a cylindrical shape that extends downwards (in the -Z direction in this case) from the edge section of the damping element 33. The second connector 34 is, for example, integrated with the damping element 33. The second connector 34 allows the damping element 33 and the fixed section 35 to be arranged at a distance from each other in the first direction Z.

[0042] The fixed section 35 is positioned closer to the piezoelectric element 9 than the damper 33 and is connected to the damper 33, with the second connector 34 positioned between them. The fixed section 35 can reduce vibrations transmitted to a component connected to it (for example, a housing containing an image acquisition device and a lens module). The fixed section 35 has a greater thickness (thickness in the second direction X) than other sections of the external vibration element 3.

[0043] The fixed section 35 comprises, as described above, the cylindrical upper section 351 and the square-prismatic lower section 352. In the Fig. 2 and Fig. In the four illustrated examples, the second connector 34 is connected to the outer circumferential surface of the upper section 351 in the fixed section 35. More precisely, the inner surface of the lower end section in the second connector 34 is in contact with the outer surface of the upper section 351 in the fixed section 35 (for example, by means of an adhesive), and the lower surface of the second connector 34 is in contact with the upper surface of the lower section 352 in the fixed section 35.

[0044] The fixed section 35 with a larger volume can reduce more vibrations of the fixed section 35. However, simply increasing the size of the fixed section 35 while simultaneously reducing the size of the vibration device 1 is less feasible. The lower section 352 in the fixed section 35 according to the present embodiment has a profile with a substantially rectangular prism shape. This structure can increase the volume of the fixed section 35 without increasing the size of the vibration device 1. For example, a cuboid with dimensions of 25 mm × 25 mm has a larger volume than a cylinder with a diameter of 25 mm. The external vibration element 3 is made of a material with a lower Young's modulus than the internal vibration element 7. This structure allows the damping element 33 to dampen more vibrations.

[0045] In the external oscillating element 3, the maximum width (maximum profile dimension) of the first connector 31 in the second direction (radial direction) X is smaller than the maximum profile dimension of the cylindrical section 32. The maximum profile dimension of the cylindrical section 32 is smaller than the maximum profile dimension of the damping element 33. The maximum profile dimensions of the damping element 33 and the second connector 34 are essentially the same and smaller than the maximum profile dimension of the fixed section 35. This structure allows a section of the external oscillating element 3, which is positioned closer to the lens 5, to oscillate more easily and reduces vibrations of the lower section 352 in the fixed section 35.

[0046] In the present embodiment, only the first connector 31 at the upper end of the external oscillating element 3 is connected to the internal oscillating element 7 or the lens 5. Sections of the external oscillating element 3 positioned below the first connector 31 (here, the cylindrical section 32, the damping element 33, the second connector 34, and the fixed section 35) are not in contact with the internal oscillating element 7. This structure can more efficiently mediate variations in the amplitude of the lens 5 without significantly affecting the axial symmetry of the oscillations of the internal oscillating element 7 (oscillations in the first direction Z).

[0047] The first connector 31, the cylinder section 32, the damper 33, the second connector 34, and the fixed section 35 can be integrated or formed separately. As illustrated, the first connector 31, the cylinder section 32, the damper 33, and the second connector 34 can be integrated, separate from the fixed section 35. If at least the cylinder section 32 and the damper 33 are integrated, non-axial symmetry can be mediated more efficiently to vibrations of the lens 5. <Linse 5>

[0048] Lens 5, for example, is made of glass. As in Fig. As illustrated in Figure 2, the upper surface 53 of the lens 5 has a convex shape and is coated, for example, with a water-repellent coating and an anti-reflective coating (AR coating). The surface of the lens 5 (lower surface) facing the optical image-generating surface comprises a flat section 51 and a recessed section 52. The edge section of the upper surface 53 of the lens 5 is, for example, bonded to the cover element 8 by means of an adhesive. The flat section 51 is, for example, bonded to the upper section 71 in the internal vibration element 7 by means of an adhesive. <Piezoelektrisches Element 9>

[0049] The piezoelectric element 9 comprises a piezoelectric body and an electrode and is capable of generating vibrations. The piezoelectric body is made, for example, of suitable piezoelectric ceramics such as barium titanate (BaTiO3), lead zirconate titanate (PZT; PbTiO3-PbZrO3), lead titanate (PbTiO3), lead metaniobate (PbNb2O6), or bismuth titanate (Bi4Ti3O3). 12 The electrode is formed from a suitable piezoelectric single crystal, such as LiTaO3 or LiNbO3, or from a suitable piezoelectric single crystal, such as LiTaO3 or LiNbO3. The electrode is formed, for example, from Ni, Ag, or Au.

[0050] As in Fig. As illustrated in Figure 2, the piezoelectric element 9 is positioned symmetrically with respect to the optical axis L. Viewed from a top view in the first direction Z, the piezoelectric element 9 has, for example, a ring-shaped form. The piezoelectric element 9 is connected, for example, by means of an adhesive to the lower section 72 in the internal vibrating element 7.

[0051] An adhesive is arranged between the lens 5 and the internal vibration element 7, between the piezoelectric element 9 and the internal vibration element 7, between the cover element 8 and the lens 5, and between the internal vibration element 7 and the external vibration element 3. The adhesive is, for example, made of epoxy resin. The use of an adhesive with a high Young's modulus can reduce vibration transmission losses between two components. <Nicht achsensymmetrische Struktur eines externen Schwingelements>

[0052] The following is made with reference to Fig. 2 and Fig. 4 to Fig. Section 6C describes in detail a non-axisymmetric structure of an external vibration element. Fig. Figure 6A is a schematic cross-sectional view of the external vibration element in the vibration device without a fixed section. Fig. 6B is a bottom view of the external vibration element located in Fig. Figure 6A illustrates this when viewed from below. Fig. 6C is a schematic cross-sectional view along the VIC-VIC line in Fig. 6A.

[0053] As in Fig. As illustrated in Figure 6A, the attenuator 33 comprises a first attenuator 331 and a second attenuator 332, which are positioned symmetrically with respect to the optical axis L in the cross-section along the optical axis L. The thickness t1 of the first attenuator 331 in the first direction Z differs from the thickness t2 of the second attenuator 332 in the first direction Z.

[0054] In the present embodiment, the thickness t1 of the first damping element 331 is greater than the thickness t2 of the second damping element 332. For example, the surface (upper surface) of the first damping element 331, which is closer to the lens 5 in the first direction Z, and the upper surface of the second damping element 332 are substantially flush with each other (here in the same plane perpendicular to the first direction Z). In contrast, the surface (lower surface) of the first damping element 331, which faces the piezoelectric element 9 in the first direction Z, is positioned closer to the piezoelectric element 9 than (in the -Z direction of) the lower surface of the second damping element 332.

[0055] The damping element 33 comprises a thick section 33a and a thin section 33b with thickness t2. The thick section 33a is thicker than the thin section 33b. The thick section 33a comprises a section with thickness t1 and a connecting section that extends outwards from the section with thickness t2 and is connected to the second connector 34. The width (w1 at a first section Q1) of the thick section 33a in the first damping element 331 in the second direction X is greater than the width (w2 at the second section Q2) of the thick section 33a in the second damping element 332. The width w2 of the thick section 33a in the second section Q2 is, for example, essentially the same as the thickness of the second connector 34 in the second direction X. In the example in Fig. 6B, the thick section 33a extends in the circumferential direction. The width of the thick section 33a in the second direction X decreases gradually in the circumferential direction from the first section Q1 to the second section Q2, having its maximum at the first section Q1 in the first damping element 331 and its minimum at the second section Q2 in the second damping element 332, which is opposite the first section Q1.

[0056] As in Fig. As illustrated in Figure 6A, the cylindrical section 32 comprises a first cylindrical section 321 and a second cylindrical section 322, which are positioned symmetrically with respect to the optical axis L in the cross-section along the optical axis L. The first cylindrical section 321 is positioned on the same side of the optical axis L as the first attenuator 331, and the second cylindrical section 322 is positioned on the same side of the optical axis L as the second attenuator 332. In the cross-section along the optical axis L, the thickness s1 of the first cylindrical section 321 differs in the second direction X from the thickness s2 of the second cylindrical section 322 in the second direction X.

[0057] In the present embodiment, the thickness s1 of the first cylinder section 321 is smaller than the thickness s2 of the second cylinder section 322. In the example in Fig. 6C the width of the cylinder section 32 in the second direction X in the circumferential direction gradually increases from the first section R1 to the second section R2, having its minimum at the first section R1 in the first damping element 321 and its maximum at the second section R2 in the second cylinder section 322, which is opposite the first section R1.

[0058] For example, the first section R1 in the cylinder section 32 borders the first section Q1 in the attenuator 33 (positioned in the same direction when viewed from the optical axis L), and the second section R2 in the cylinder section 32 borders the second section Q2 in the attenuator 33. This structure further facilitates amplitude matching with a combination of non-axial symmetry of the cylinder section 32 and the attenuator 33.

[0059] As in Fig. 2 and Fig. As illustrated in Figure 5, the external oscillating element 3 in the cross-section along the optical axis L comprises a first external oscillating element 3L, which is attached to a first side (-X-side or left side in Fig. 2) is positioned on the optical axis L, and a second external oscillating element 3R is located on a second side (+X-side or right side in Fig. 2) is positioned on the optical axis L. The first external oscillating element 3L comprises the first damping element 331 and the first cylinder section 321. The second external oscillating element 3R comprises the second damping element 332 and the second cylinder section 322.

[0060] In the present embodiment, the external oscillating element 3 is configured to allow non-axial symmetry between the damping element 33 and the cylindrical section 32, thereby increasing the amplitude caused by vibrations generated by the piezoelectric element 9 more at the first external oscillating element 3L than at the second external oscillating element 3R. For example, in a top view, the amplitude caused by vibrations of the external oscillating element 3 gradually decreases in the first direction Z from the first sections Q1 and R1 to the second sections Q2 and R2. Therefore, the amplitude of the lens 5 connected to the first connector 31 can be varied.More precisely, the amplitude in an area of ​​the surface of the lens 5 that is positioned closer to the first external oscillating element 3L can be larger than the amplitude in an area of ​​the surface of the lens 5 that is positioned closer to the second external oscillating element 3R. <Anordnung der Schwingvorrichtung>

[0061] Fig. Figure 7 is a schematic perspective cross-sectional view of an example arrangement of the vibration device 1. The vibration device 1 is arranged, for example, such that the second external vibration element 3R, which causes a relatively smaller amplitude, is positioned vertically above the first external vibration element 3L, which causes a relatively larger amplitude. With this arrangement, the amplitude at a first point P1 on the surface of the lens 5, which is positioned lower in the vertical direction, is greater than the amplitude at a second point P2, which is positioned higher in the vertical direction.

[0062] For example, the first point P1 is positioned around a section of an exposed surface of the lens 5 where the damping element 33 is thickest and the cylinder section 32 is thinnest (adjacent to the first sections Q1 and R1). For example, the second point P2 is positioned around a section of an exposed surface of the lens 5 where the damping element 33 is thinnest and the cylinder section 32 is thickest (adjacent to the second sections Q2 and R2). The “exposed surface of the lens 5” is a section of the upper surface of the lens 5 that is exposed by the external vibration element 3, the internal vibration element 7, and the cover element 8.

[0063] Fig. Figure 8 is a diagram of the degree of displacement on the exposed surface of lens 5 along a line connecting the first point P1 and the second point P2. As shown from Fig. As can be seen from Figure 8, the degree of displacement (more precisely, the amplitude of the lens 5) increases gradually from the second point P2 towards the first point P1. If the oscillating device 1 is arranged to allow the amplitude on the surface of the lens 5 to increase gradually in a gravitational direction G (downwards in the vertical direction), it is more likely that foreign bodies will slide off the surface of the lens 5.

[0064] In the present embodiment, as in Fig. As illustrated in Figure 2, a wire 100 is connected to the piezoelectric element 9 at a position closer to the second external oscillating element 3R than to the first external oscillating element 3L, and a voltage is applied to the piezoelectric element 9 via the wire 100. Connecting the wire 100 in this way, from a section closer to the second external oscillating element 3R, which causes a smaller amplitude, can reduce wire 100 coming loose and noise caused by wire 100 vibrations. <Frequenzanpassung einer Eigenschwingung eines externen Schwingelements 3>

[0065] The dimensions of the damping element 33 and the cylinder section 32 can be adjusted to provide an intended variation in the amplitude of the lens 5.

[0066] Fig. Figure 9A is a schematic cross-sectional view of an example of a natural frequency of an internal vibration element alone. Fig. 9B and Fig. Figure 9C shows schematic cross-sectional views of an example of the natural frequency of an external vibrating element alone. In these drawings, a steady state is shown with solid lines and a vibrational state (at which the amplitude is highest) is shown with dashed lines.

[0067] As in Fig. Figure 9A illustrates that, when not connected to an external oscillating element, the internal oscillating element 7 and the lens 5 oscillate in the first direction Z, with the lower section 72, shaped like the letter S, contracting and expanding. The resonant frequency is, for example, 22 to 29 kHz.

[0068] The natural frequency of the external oscillating element 3 alone can, for example, assume two modes A and B, as in Fig. 9B and Fig. 9C illustrates this. As in Fig. As illustrated in Figure 9B, the amplitude of the first external oscillating element 3L, comprising a first damper and a first cylinder section, is smaller in mode A than the amplitude of the second external oscillating element 3R, comprising the second damper and the second cylinder section. As shown in Figure 9B, the amplitude of the first external oscillating element 3L, comprising a first damper and a first cylinder section, is smaller in mode A than the amplitude of the second external oscillating element 3R, comprising the second damper and the second cylinder section. Fig. As illustrated in Figure 9C, the amplitude of the first external oscillating element 3L in mode B is greater than that of the second external oscillating element 3R. Adjusting the frequencies (resonance frequencies) of a natural oscillation of these modes A and B makes it possible to create a natural oscillation ( Fig. 9A) to connect the internal oscillating element 7 with amplitudes of one of these modes. An intended variation of the amplitude of the lens 5 can therefore be achieved without increasing the resonance resistance value of the internal oscillating element 7.

[0069] The natural frequencies of the external oscillating element 3 in modes A and B can be adjusted, for example, by changing the spring characteristics of the damping element 33 and the cylinder section 32. The spring characteristics of the damping element 33 and the cylinder section 32 can be changed, for example, by altering the materials or the following parameters, as described in Fig. 6A illustrates, can be adapted. t1, t2: Thicknesses of the first and second damping element 331 and 332 in the first direction Z w1: Width of the thick section 33a in the damping element 33 s1, s2: Thicknesses of the first and second cylinder sections 321 and 322 in the second direction X h: Height of cylinder section 32 in the direction Z u: Distance in the second direction X between the outer surface of the cylinder section 32 and the outer surface of the damping element 33

[0070] In the present embodiment, the frequency in mode B is adjusted to be closer to the resonant frequency (for example, approximately 26 kHz) of the internal oscillating element 7 than the frequency in mode A. For example, the frequency in mode A can be adjusted to 19.1 kHz and the frequency in mode B can be adjusted to 29.6 kHz. Consequently, the natural frequency ( Fig. 9C) of the external oscillating element 3 in mode B and the natural frequency of the internal oscillating element 7 in the oscillating device 1 are coupled. In this case, the amplitude of the first external oscillating element 3L, which comprises a thick damping element and a thin cylindrical section, is greater than the amplitude of the second external oscillating element 3R, which comprises a thin damping element and a thick cylindrical section. Therefore, the amplitude in a region of the lens 5 that is positioned closer to the first external oscillating element 3L can be greater than the amplitude in a region of the lens 5 that is positioned closer to the second external oscillating element 3R. (Effects)

[0071] The oscillating device 1 can exert the effects described below.

[0072] The oscillating device 1 comprises the essentially tubular internal oscillating element 7, which extends in the first direction; the piezoelectric element 9, which is connected to a first end section of the internal oscillating element 7 in the first direction Z; the light-transmitting body (here the lens 5), which is connected to a second end section of the internal oscillating element 7 in the first direction Z and has an optical axis L extending in the first direction Z; and the essentially tubular external oscillating element 3, which extends in the first direction Z. The external oscillating element 3 is arranged to surround the internal oscillating element 7.The external oscillating element 3 comprises the first connector 31, which is connected to the translucent body; the damping element 33, which extends from the first connector 31 in the second direction X, intersecting the first direction Z, towards the outside of the translucent body; and the cylindrical section 32, which connects the first connector 31 and the damping element 33 and extends in the first direction Z. The cylindrical section 32 is arranged at a distance from the internal oscillating element 7 in the second direction X. At least one of the damping element 33 or the cylindrical section 32 exhibits non-axial symmetry with respect to the optical axis.

[0073] In the above structure, at least one of the damping element 33 or the cylindrical section 32 in the external vibration element 3 exhibits non-axial symmetry, allowing the amplitude on the surface of the translucent body to be varied during vibration. Foreign particles adhering to the surface of the translucent body can thus be effectively removed. Additionally, reducing the unevenness of the load exerted on the internal vibration element 7 during vibration can mitigate impedance degradation.

[0074] In the present disclosure, "essentially tubular" denotes any structure having a through-hole extending in a direction of extension (here, the first direction Z), including, for example, an essentially cylindrical shape and an essentially angular tubular shape. The through-hole in an essentially tubular body, for example, has an essentially circular shape, such as the shape of a perfect circle or an ellipse. The profile of the essentially tubular body may have a cylindrical shape or an essentially polygonal prism shape, such as a quadrilateral prism. The essentially tubular body may include a conical section with a cross-section that extends or contracts in the first direction Z, or a stepped section.At least sections of the internal vibration element 7 and the external vibration element 3 that are positioned closer to the lens 5 preferably have a substantially cylindrical shape. This structure can facilitate intentional variation of the amplitude of the surface of the lens 5 while simultaneously reducing unused vibrations.

[0075] In a cross-section along the optical axis L, the damping element 33 comprises the first damping element 331 and the second damping element 332, which are positioned symmetrically with respect to the optical axis L, and the thickness t1 of the first damping element 331 differs in the first direction Z from the thickness t2 of the second damping element 332 in the first direction Z. In this structure, the vibrating device 1 has a symmetrical appearance, while at the same time a non-axial symmetry is imparted to the damping element 33.

[0076] In the cross-section along the optical axis L, the cylindrical section 32 comprises the first cylindrical section 321 and the second cylindrical section 322, which are positioned symmetrically with respect to the optical axis L. The thickness s1 of the first cylindrical section 321 differs in the second direction X from the thickness s2 of the second cylindrical section 322 in the second direction X. In this structure, the oscillating device 1 has a symmetrical appearance, while at the same time a non-axial symmetry is conveyed to the cylindrical section 32.

[0077] Both the damping element 33 and the cylinder section 32 exhibit non-axial symmetry with respect to the optical axis. The damping element 33 is primarily involved in vibrations in the first direction Z, and the cylinder section 32 is primarily involved in vibrations in the second direction X. Since both the damping element 33 and the cylinder section 32 exhibit non-axial symmetry, it is more likely that an intentional variation of the amplitude of the lens 5 can be achieved, for example, by adjusting the dimensions, direction, or position of the non-axial symmetry of the damping element 33 and the cylinder section 32.

[0078] In the cross-section along the optical axis L, the first attenuator 331 and the first cylindrical section 321 are positioned on one side of the optical axis L, and the second attenuator 332 and the second cylindrical section 322 are positioned on the other side of the optical axis L. The thickness t1 of the first attenuator 331 in the first direction Z is greater than the thickness t2 of the second attenuator 332 in the first direction Z. The thickness s1 of the first cylindrical section 321 in the second direction X is less than the thickness s2 of the second cylindrical section 322 in the second direction X. Consequently, the structure, in which the direction of the non-axial symmetry (here, the thickness ratio) of the cylindrical section 32 is opposite to the direction of the non-axial symmetry of the attenuator 33, exhibits the following effects.

[0079] The inventors of the present invention have found through studies that it is less likely that a non-axial symmetry of the damping element 33 alone mediates an intended variation in the amplitude of the lens 5. If the thickness t1 of the first damping element 331 is too small, an increase in the amplitude during oscillation of the lens 5 to the maximum at the end section that is closer to the first damping element 331 may fail. More precisely, the position of the maximum displacement point of the lens 5 is shifted from the end section of the lens 5 towards the optical axis L (see Figure 1). Fig. 16) If, however, the thickness t1 of the first damper 331 is too large, vibrations transmitted to the fixed section 35, which is positioned below (to the side away from the lens 5), increase, and vibration efficiency during the assembly of a camera module deteriorates. Conversely, if the cylindrical section 32 has non-axial symmetry in the opposite direction to the damper 33, the degree of displacement at an end section of the lens 5, which is positioned closer to the first damper 331, can be further increased (for example, to the maximum) (see Fig. 8). This structure can therefore mediate an intended variation of the amplitude of the lens 5 while simultaneously reducing a deterioration in vibration efficiency.

[0080] In the cross-section along the optical axis L, the external oscillating element 3 comprises the first external oscillating element 3L and the second external oscillating element 3R, which are positioned symmetrically with respect to the optical axis L. If the amplitude of the first external oscillating element 3L, caused by vibrations generated by the piezoelectric element 9, is greater than the amplitude of the second external oscillating element 3R, caused by vibrations generated by the piezoelectric element 9, the second external oscillating element 3R is positioned higher in the vertical direction than the first external oscillating element 3L. In this configuration, the amplitude on the surface of the lens 5 is greater in a region positioned lower in the vertical direction than in a region positioned higher in the vertical direction.This structure can therefore allow foreign bodies adhering to the surface of the translucent body to slide off during vibrations. In the structure where the variation in amplitude on the surface of lens 5 gradually increases in the direction of gravity G, it is more likely that the sliding off of foreign bodies will be facilitated.

[0081] If the amplitude of the first external oscillating element 3L, caused by vibrations generated by the piezoelectric element 9, is greater than the amplitude of the second external oscillating element 3R, caused by vibrations generated by the piezoelectric element 9, a wire 100 is connected to the piezoelectric element 9 at a position closer to the second external oscillating element 3R than to the first external oscillating element 3L. This structure can reduce wire 100 coming loose and noise caused by wire 100 vibrations.

[0082] The internal vibration element 7 exhibits axial symmetry with respect to the optical axis. In this structure, the internal vibration element 7 does not exhibit any non-axial symmetry, and it is less likely that unused vibrations will occur that can be attributed to the structure of the internal vibration element 7. Consequently, the superposition of unused vibrations of the internal vibration element 7 can be further reduced. This structure can therefore further reduce impedance degradation. Additionally, minimizing the unevenness of the load exerted on the internal vibration element 7 during vibration can further reduce impedance degradation.

[0083] The piezoelectric element 9 exhibits axial symmetry with respect to the optical axis L. In this structure, it is less likely that unused vibrations will occur that can be attributed to the structure of the piezoelectric element 9. Consequently, the superposition of unused vibrations from the internal oscillating element 7 can be reduced. This structure can therefore further reduce impedance degradation.

[0084] The vibrating device 1 can have a structure as described below.

[0085] In the Fig. In the illustrated example 6B, the thick section 33a in the damping element 33 extends circumferentially over the entire damping element 331; however, the thick section 33a can, as in Fig. 10A and Fig. Figure 10B illustrates that the thick section 33a is positioned on a portion of the first damping element 331. In this example, the thick section 33a comprises an arc-shaped section along part of the outer edge of the first damping element 331 when viewed in a top view in the -Z direction.

[0086] The dimensions ( Fig. 4) of the damping element 33 and the cylinder section 32 can be adapted to prevent a natural oscillation of the external oscillating element 3 in mode A ( Fig. 9B) and to couple a natural frequency of the internal oscillating element 7. In this case, the amplitude of the first external oscillating element 3L is smaller than the amplitude of the second external oscillating element 3R. This structure can be achieved, for example, by reducing the height h of the cylindrical section 32.

[0087] Non-axial symmetry of the damping element 33 and / or the cylinder section 32 is not limited to a difference in thickness. Either the damping element 33 or the cylinder section 32 can exhibit non-axial symmetry. (Examples of variations)

[0088] The following are descriptions of vibration devices according to modified examples. As with vibration device 1 in Fig. 2. Oscillating devices according to the first to third modification example, as described below, can provide a variation of the amplitude of a lens without losing an axial symmetry of an internal oscillating element. <Erstes Abwandlungsbeispiel>

[0089] Fig. Figure 11 is a schematic cross-sectional view of a vibrating device according to a first modification example. Fig. Figure 12A is a schematic cross-sectional view of an external vibration element in the vibration device in Fig. 11 without a fixed section. Fig. 12B is a cross-sectional view along line XIIB-XIIB in Fig. 12A. Fig. Figure 13 is a schematic perspective view of an example arrangement of the oscillating device in Fig. 11. Fig. Figure 14 is a diagram of an example of the degree of displacement of the surface of lens 5 of the oscillating device in Fig. 11.

[0090] In a vibrating device 1a, the cylindrical section 32 exhibits non-axial symmetry with respect to the optical axis L. More precisely, the thickness s2 of the second cylindrical section 322 is greater than the thickness s1 of the first cylindrical section 321. In contrast, the damping element 33 is axially symmetric with respect to the optical axis L. For example, the thickness t of the damping element 33 is essentially uniform over its entire circumference.

[0091] As in Fig. 12A and Fig. As illustrated in Figure 12B, in this modified example, the cylindrical section 32 comprises a main section 324, which is integrated with the damping element 33, and a weight element 325. The main section 324, for example, has a substantially uniform thickness s1 over its entire circumference. The weight element 325 is positioned within the main section 324 in the second cylindrical section 322 and is in contact with the inner surface of the main section 324. The weight element 325, for example, has a semi-cylindrical shape extending in the first direction Z. The thickness s2 of the second cylindrical section 322 in the second direction X corresponds to the combined thickness of the main section 324 and the weight element 325. Thus, the thickness s2 of the second cylindrical section 322 is greater than the thickness s1 of the first cylindrical section 321 by the thickness of the weight element 324.

[0092] The material of the weight element 325 can be the same as, or different from, the material of the damping element 33. The elastic modulus of the material of the weight element 325 can be greater than the elastic modulus of the material of the damping element 33. This structure can thus mediate a variation in the amplitude of the lens 5 more efficiently.

[0093] In the illustrated example, the weight element 325 is arranged over the entire height of the main section 324 in the first direction Z. As shown in Fig. As illustrated in Figure 12A, the weight element 325 and the main section 324 extend towards the upper surface of the damping element 33 in the first direction Z. Thus, the cylindrical section 32 does not include an inclined section, as shown in Figure 12A. Fig. Figure 2 illustrates that the height of the weight element 325 in the first direction Z can be smaller than the height of the main section 324.

[0094] In the oscillating device 1a according to the present modified example, for instance, the amplitude of the second external oscillating element 3R, which comprises the second cylinder section 322, is smaller than the amplitude of the first external oscillating element 3L, which comprises the first cylinder section 321. In this case, the oscillating device 1a, as shown in Fig. Figure 13 illustrates how the second external vibration element 3R is arranged to allow it to be positioned higher in the vertical direction. As shown in Fig. As illustrated in Figure 14, this structure can, for example, gradually increase the amplitude of the vibration from the second point P2, which is positioned at the upper end section of the lens 5, to the first point P1, which is positioned at the lower end section of the lens 5. The first point P1 can, for example, be a point on the exposed surface of the lens 5, adjacent to the center point of the weight element 325 in the circumferential direction.

[0095] In the present modified example, the first cylindrical section 321 is formed from a part of the main section (also referred to as the "first component") 324, and the second cylindrical section 322 is formed from another part of the main section 324 and the weight component (also referred to as the "second component") 325. The weight component 325 is positioned on the inside of the main section 324. The weight component 325 can be made of the same material or a different material than the main section 324. This structure allows the vibrating device 1 to have a symmetrical appearance while simultaneously imparting non-axial symmetry to the cylindrical section 32. This structure also allows the damping element 33 (the first damping element 331) to be thinner than the vibrating device 1. Fig. 2. This structure can thus dampen vibrations transmitted from the damping element 33 to the fixed section 35. The thickness of the cylindrical section can be partially varied without providing an additional component, such as the weight component 325 (see Fig. 2). <Zweites Abwandlungsbeispiel>

[0096] Fig. Figure 15 is a schematic cross-sectional view of a vibrating device according to a second modification example. Fig. Figure 16 is a schematic diagram of an example of the degree of displacement of the lens surface of the oscillating device in Fig. 15.

[0097] In a vibrating device 1b, the damping element 33 exhibits non-axial symmetry with respect to the optical axis L. For example, the thickness t1 of the first damping element 331, as in the case of the one in Fig. 2 illustrated vibrating device 1, larger than the thickness t2 of the second damping element 332. For example, the damping element 33 comprises, as in the case of the one in Fig. 6B or Fig. Figure 13B illustrates the structure, the thick section 33a and the thin section 33b. The cylindrical section 32 is axially symmetric with respect to the optical axis L. For example, the thickness s of the cylindrical section 32 is essentially uniform over its entire circumference. This structure allows the vibrating device 1 to have a symmetrical appearance while simultaneously imparting non-axial symmetry to the damping element 33.

[0098] In the oscillating device 1b according to the present modified example, the amplitude of the first external oscillating element 3L, which comprises the first damping element 331, is greater than the amplitude of the second external oscillating element 3R, which comprises the second damping element 332. In this case, the oscillating device 1b is arranged, for example, to allow the first section Q1 in the first damping element 331 ( Fig. 6B) is positioned in the vertical direction below, and to allow the second section Q2 ( Fig. 6B) in the second damping element 332 is positioned higher in the vertical direction. This structure allows, for example, the amplitude at the first point P1 at the lower end section of the lens 5 to be larger than the amplitude at the second point T2 at the upper end section of the lens 5, as shown in Fig. 16 illustrated.

[0099] In the Fig. In the illustrated example 16, a maximum displacement point P3 on the exposed surface of the lens 5, where the degree of displacement is highest, is positioned closer to the second point P2 than the first point P1. If the first damper 331 becomes thicker, the maximum displacement point P3 can be located closer to the first point P1. However, if the damper 331 becomes thicker, vibrations transmitted from the damper 331 to the fixed section 35 below the damper 331 are more likely to be amplified, which can reduce the vibration efficiency. In the present modified example, the thickness t1 of the first damper 331 is therefore adjusted to facilitate the sliding of foreign bodies by bringing the maximum displacement point P3 as close as possible to the first point P1 (lower end section of the lens 5) without losing vibration efficiency.

[0100] In the oscillating device 1b, the amplitude of the first damping element 331 can be smaller than the amplitude of the second damping element 332. Such a structure can be achieved, for example, by adjusting dimensions, such as reducing the height h of the cylindrical section 32. <Drittes Abwandlungsbeispiel>

[0101] Fig. Figure 17 is a schematic perspective view of a oscillating device according to a third variation example. Fig. 18 is a schematic cross-sectional view along the line XVIII-XVIII in Fig. 17.

[0102] In a vibration device 1c, the material of the first damping element 331 and the first cylinder section 321 differs from the material of the second damping element 332 and the second cylinder section 322. The damping element 33 and the cylinder section 32 can both be axially symmetrical with respect to the optical axis L. This structure allows the vibration device 1 to have a symmetrical appearance, while simultaneously imparting non-axial symmetry to the damping element 33 and the cylinder section 32.

[0103] In the Fig. 17 and Fig. In the illustrated example 18, a section of the external vibration element 3, excluding the fixed section 35, is formed from two materials. More precisely, the first connector 31, the cylindrical section 32 (the first cylindrical section 321), the damping element 33 (the first damping element 331), and the second connector 34, which is contained in the first external vibration element 3L, are formed from a first material. The first connector 31, the cylindrical section 32 (the second cylindrical section 322), the damping element 33 (the second damping element 332), and the second connector 34, which is contained in the second external vibration element 3R, are formed from a second material that differs from the first material.

[0104] For example, materials with different moduli of elasticity (Young's moduli) can be selected as the first and second materials. If, for example, the modulus of elasticity of the second material is greater than that of the first material, the amplitude of the second external vibration element 3R, which is made of the second material, will be smaller than the amplitude of the first external vibration element 3L, which is made of the first material. In this case, the vibration device 1c is arranged, for example, to allow the second external vibration element 3R to be positioned higher in the vertical direction than the first external vibration element 3L.

[0105] In the present modified example, both the damping element 33 and the cylinder section 32 are formed from two materials; however, it is also possible for only one of the damping element 33 or the cylinder section 32 to be formed from two materials. In this modified example, the first and second materials have different moduli of elasticity, but they can also differ in density or mechanical Q-factor. The characteristics of the structure, such as the type of material used, the number of materials used, the arrangement of each material, or the ratio of each material, are not subject to any restrictions, as long as the structure can impart non-axial symmetry to at least one of the damping element 33 or the cylinder section 32.

[0106] A structure of a vibrating device according to the present invention is not limited to the structure described above with reference to Fig. 1 to Fig. 18. In these drawings, the damping element 33 and the cylinder section 32 are integrated, but can also be formed from separate components.

[0107] Non-axial symmetry of the damping element 33 and the cylinder section 32 can be achieved through a combination of two or more of the components described above. For example, the damping element 33 and / or the cylinder section 32 can differ partially with respect to both the material and the thickness.

[0108] The effects described above can be achieved through a suitable combination of the various embodiments or modifications. Furthermore, it is also possible to combine embodiments with one another, examples with one another, or embodiments with examples, and features from different embodiments or examples can also be combined.

[0109] Although the present invention is described in the exemplary embodiments to a certain degree of detail, the disclosed exemplary embodiments can be modified with regard to structural details and changes can be made with regard to the combination and sequence of elements in each exemplary embodiment without deviating from the scope of protection and essence of the claimed invention.

[0110] A vibrating device according to the present invention can remove foreign bodies adhering to a translucent body and can therefore be applied, for example, to an image acquisition unit. Reference symbol list 1, 1a, 1b, 1c Oscillating device 3 external vibration element 3L first external vibration element 3R second external vibration element 5 lens 7 internal vibration element 8 Cover component 9 piezoelectric element 31 first connector 32 Cylinder section 33 Damper element 33a thick section 33b thin section 34 second connector 35 fixed section 41 upper tubular body 42 lower tubular body 51 flat section 52 Excluded Section 53 upper surface 71 upper section 72 lower section 73 Intermediate section 100 wires 321 first cylinder section 322 second cylinder section 324 Main Section 325 Weight component 331 first damping element 332 second damping element 711 Plate section 712 lead L optical axis Q1, Q2 section of a damping element R1, R2 section of a cylinder section P1 first point P2 second point QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 6819846

[0003]

Claims

[1] A vibrating device which has the following features: an essentially tubular internal oscillating element capable of amplifying vibrations and extending in a first direction; a piezoelectric element that is connected to a first end section of the internal oscillating element in the first direction and is capable of generating oscillations; a translucent body connected to a second end section of the internal oscillating element in the first direction and having an optical axis extending in the first direction; and an essentially tubular external oscillating element arranged to surround the internal oscillating element and extending in the first direction, the external vibration element comprises the following features: a first connector that is connected to the translucent body, a damping element extending from the first connector in one direction away from the translucent body in a second direction that intersects the first direction to dampen vibrations, and a cylindrical section that connects the first connector and the damping element and extends in the first direction, wherein the cylinder section is arranged at a distance from the internal oscillating element in the second direction and wherein at least one of the damping element or the cylinder section exhibits non-axial symmetry with respect to the optical axis. [2] The oscillating device according to claim 1, wherein, in a cross-section along the optical axis, The attenuator comprises a first attenuator and a second attenuator, which are positioned symmetrically with respect to the optical axis, and the thickness of the first damping element differs from the thickness of the second damping element in the first direction. [3] The oscillating device according to claim 1 or 2, wherein, in a cross-section along the optical axis, the cylinder section comprises a first cylinder section and a second cylinder section, which are positioned symmetrically with respect to the optical axis, and the thickness of the first cylinder section differs in the second direction from the thickness of the second cylinder section in the second direction. [4] The oscillating device according to claim 3, wherein the cylindrical section comprises a first component and a second component, wherein the first cylinder section is formed from a section of the first component, wherein the second cylinder section is formed from another section of the first component and the second component, wherein the second component is positioned in the second cylinder section within the first component. [5] The oscillating device according to one of claims 1 to 4, wherein both the damping element and the cylinder section have non-axial symmetry with respect to the optical axis. [6] The oscillating device according to claim 5, wherein, in a cross-section along the optical axis, The attenuator comprises a first attenuator and a second attenuator, which are positioned symmetrically with respect to the optical axis. the cylinder section comprises a first cylinder section and a second cylinder section, which are positioned symmetrically with respect to the optical axis, the first attenuator and the first cylinder section are positioned on a first side of the optical axis, and the second attenuator and the second cylinder section are positioned on a second side of the optical axis, the thickness of the first damping element in the first direction is greater than the thickness of the second damping element in the first direction, and The thickness of the first cylinder section in the second direction is smaller than the thickness of the second cylinder section in the second direction. [7] The oscillating device according to any one of claims 1 to 6, wherein, in a cross-section along the optical axis, the attenuator comprises a first attenuator and a second attenuator which are positioned symmetrically with respect to the optical axis, and where the first damping element and the second damping element are made of different materials. [8] The oscillating device according to any one of claims 1 to 7, wherein, in a cross-section along the optical axis, the cylinder section comprises a first cylinder section and a second cylinder section which are positioned symmetrically with respect to the optical axis, and where the first cylinder section and the second cylinder section are made of different materials. [9] The oscillating device according to any one of claims 1 to 8, wherein, in a cross-section along the optical axis, the external oscillating element comprises a first external oscillating element and a second external oscillating element which are positioned symmetrically with respect to the optical axis, and wherein if the amplitude of the first external oscillating element caused by vibrations generated by the piezoelectric element is greater than the amplitude of the second external oscillating element caused by vibrations generated by the piezoelectric element, the second external oscillating element is positioned higher in a vertical direction than the first external oscillating element. [10] The oscillating device according to any one of claims 1 to 9, wherein the internal oscillating element has axial symmetry with respect to the optical axis. [11] The oscillating device according to any one of claims 1 to 10, wherein the piezoelectric element has axial symmetry with respect to the optical axis. [12] The oscillating device according to any one of claims 1 to 11, wherein, in a cross-section along the optical axis, the external oscillating element comprises a first external oscillating element and a second external oscillating element which are positioned symmetrically with respect to the optical axis, and wherein, if the amplitude of the first external oscillating element caused by vibrations generated by the piezoelectric element is greater than the amplitude of the second external oscillating element caused by vibrations generated by the piezoelectric element, a wire is connected to the piezoelectric element at a position closer to the second external oscillating element than to the first external oscillating element.

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