# US 12,016,248 B2 · Vibration device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,248 B2 - Document ID: US12016248B2 - Status: Granted - Kind: B2 - Application number: 17/376,207 - Filed: 2021-07-15 - Published: 2021-11-18 - Granted: 2024-06-18 - Earliest claimed: 2020-05-15 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Noritaka Kishi; Takahide Nakadoi - Web page: https://patentgrep.com/patent/US12016248B2 ## CPC - H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators - B06B 1/06: operating with piezoelectric effect or with electrostriction (piezoelectric or electrostrictive devices per se H10N30/00) - B08B 7/02: by distortion, beating, or vibration of the surface to be cleaned {(B08B7/0007 takes precedence)} - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G02B 27/0006: {with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation (G02B1/18 takes precedence; cleaning in general B08B)} - G03B 17/08: Waterproof bodies or housings - H02K 5/00: Casings; Enclosures; Supports - H10N 30/708: {Intermediate layers, e.g. barrier, adhesion or growth control buffer layers} - H10N 30/87: Electrodes or interconnections, e.g. leads or terminals - H10N 30/073: by fusion of metals or by adhesives - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A vibration device includes a tubular body with a cavity, a first opening end surface, and a second opening end surface, a piezoelectric device joined to the first opening end surface, and a translucent cover joined to the second opening end surface. The tubular body and the piezoelectric device are joined to each other with a first adhesive layer, and the tubular body and the translucent cover are joined to each other with a second adhesive layer. ## Claims ### Claim 1 A vibration device, comprising: a tubular body including a cavity, a first opening end surface, and a second opening end surface; a vibrating element joined to the first opening end surface of the tubular body; and a translucent cover joined to the second opening end surface of the tubular body to cover the cavity of the tubular body; wherein the tubular body and the vibrating element are joined to each other with a first adhesive layer; the tubular body and the translucent cover are joined to each other with a second adhesive layer; when a thickness of the first adhesive layer is denoted as t1, a thickness of the second adhesive layer is denoted as t2, an absolute value of deformation of the first adhesive layer in a thickness direction of the first adhesive layer when a first stress is imposed on the first adhesive layer in the thickness direction is denoted with |Δt1|, and an absolute value of deformation of the second adhesive layer in a thickness direction of the second adhesive layer when a second stress is imposed on the second adhesive layer in the thickness direction is denoted with |Δt2|, a relationship between the absolute value |Δt1| and the absolute value |Δt1| when the first adhesive layer and the second adhesive layer receive equal stress is |Δt1|>|Δt2|. ### Claim 2 (depends on 1) The vibration device according to claim 1, wherein t1>t2. ### Claim 3 (depends on 1) The vibration device according to claim 1, wherein the first adhesive layer includes first spacers, and the second adhesive layer includes second spacers; and S1>S2, where an average height of the first spacers is denoted as S1, and an average height of the second spacers is denoted as S2. ### Claim 4 (depends on 1) The vibration device according to claim 1, wherein Y1Ra2, where arithmetic mean roughness of a surface of the vibrating element that is in contact with the first adhesive layer is denoted as Ra1, and arithmetic mean roughness of a surface of the translucent cover that is in contact with the second adhesive layer is denoted as Ra2. ### Claim 6 (depends on 1) The vibration device according to claim 1, further comprising a retainer that fixes the tubular body and the translucent cover to each other, and imposes compression stress on the second adhesive layer. ### Claim 7 (depends on 1) The vibration device according to claim 1, wherein when a direction connecting the first opening end surface and the second opening end surface of the tubular body is defined as an axial direction, the second adhesive layer includes an internal edge located on an inner side in a direction orthogonal or substantially orthogonal to the axial direction, and an external edge located on an outer side in the direction orthogonal or substantially orthogonal to the axial direction; and t2i