Tdk Corporation

Nec Corporation

Nikon Corporation

Kyocera Corporation

Olympus Optical Company, Ltd.

Satoh Gosei Co., Ltd.

Akira Satoh

Kaoru Kijima

Takeshi Nomura

Yukie Nakano

Shigeharu Suzuki

Atsushi Hitomi

Shin-ichi Sato

Tomohiro Arashi

Yoshikazu Shimura

Hisashi Mukataka

Masahiro Nagata

Tsuruo Hatori

Hiroyoshi Tode

Ryushi Imoo

Yoshinobu Akimoto

Hidemasa Aiba

A vibration device includes: a piezoelectric unit including a piezoelectric element; and a housing made of metal that holds the piezoelectric unit. The housing includes a bottom surface portion to which the piezoelectric unit is fixed, and side surface portions that stand at an edge portion of the bottom surface portion to surround the piezoelectric unit. The side surface portions are continuous with the bottom surface portion, and are inclined to open outward from the edge portion with respect to the bottom surface portion.

Vibration device

A vibration device includes: a piezoelectric unit including a piezoelectric element; a housing that holds the piezoelectric unit; a wiring member electrically connected to the piezoelectric unit; and a joining member that joins the housing to an external device. The housing includes a bottom surface portion to which the piezoelectric unit is fixed, and a side surface portion standing at an edge portion of the bottom surface portion. The side surface portion has a first surface formed on a top portion of the side surface portion, and a second surface that is one step lowered from the first surface by a cutout portion formed in the top portion. The joining member extends along the first surface to bridge over the cutout portion. The wiring member is joined to the joining member at a position of the first surface, and passes through the cutout portion in a state where the wiring member is not joined to the second surface.

An acoustic deviceincludes a piezoelectric element and a housing. The housingincludes a main body portionand a rib portion. The main body portionincludes a vibrating portionand a plurality of support portions. The rib portionis connected to the main body portion. The rib portionextends in a third direction between a pair of the support portionsand) facing each other and separated from each other in the third direction intersecting a second direction, when viewed from the second direction along a vibrating surface. A hollow region V is defined by the vibrating portionand the plurality of support portions, The above opening Sis defined by the rib portionand the main body portionand communicates with the hollow region V. The rib portioncovers the middle of the hollow region V when viewed from the second direction.

Acoustic device and sound generation device

An acoustic device includes a piezoelectric element, an attachment member to which the piezoelectric element is attached, and a spacer. The piezoelectric element includes first and second principal surfaces opposing each other. The attachment opposes the first principal surface. The spacer is disposed between the piezoelectric element and the attachment member in such a manner as to form an acoustic space between the piezoelectric element and the attachment member. The spacer includes an adhesive layer including a principal surface in contact with the first principal surface and a principal surface in contact with the attachment member.

Acoustic device with a piezoelectric element

Piezoelectric element

Provided is a piezoelectric module capable of attempting further miniaturization. In the piezoelectric module, a resonance point is excluded from a frequency band of a transmitted signal to avoid shortening of a signal transmission distance, thereby attempting improvement in stability of communication. In addition, since a resonance space is not provided, further miniaturization may be easily attempted.

Piezoelectric module

A piezoelectric sounding body includes: a piezoelectric vibrating plate; a case housing the piezoelectric vibrating plate; a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate. The case includes: a lower case where the first conductive terminal and the second conductive terminal are fixed; and an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case.

Piezoelectric sounding body

A piezoelectric sounding body includes: a piezoelectric vibrating plate; a case housing the piezoelectric vibrating plate; a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate. At least one of the first conductive terminal and the second conductive terminal includes: a first terminal portion arranged inside the case; a second terminal portion arranged on the outside of the case; and a third terminal portion arranged in a terminal insertion hole formed in the case to connect the first terminal portion and the second terminal portion. The first terminal portion includes a sandwiching portion configured to sandwich part of the case between the first terminal portion and the second terminal portion.

Surface mounted piezoelectric sounder

A piezoelectric sounder for transmitting a signal by using a sound comprises a piezoelectric diaphragm constructed by attaching a piezoelectric element to a metal sheet, a ease containing the piezoelectric diaphragm and having a resonance space defined therewithin and adapted to resonate as the piezoelectric diaphragm vibrates, a pair of terminals electrically connected to the metal sheet and piezoelectric element of the piezoelectric diaphragm, while the piezoelectric sounder has no resonance points fr, fa in a frequency range of the signal. Thus removing the resonance points fr, fa from the frequency band of the signal to be transmitted prevents the signal transmission distance from shortening at the resonance points, thereby improving the stability in communications.

Piezoelectric sounder

A mechanism for the eye contact element of an optical device in which a cylindrical eye contact element is slidably engaged with an eyepiece holding barrel containing an eyepiece therein has a guide mechanism for shifting the eye contact element in the direction of the optical axis of the eyepiece with the rotation of the eye contact element about the optical axis when the eye contact element is rotatively operated, and a holding mechanism for holding the eye contact element at any shifted position.

Mechanism for eye contact element of optical device

An object of the invention is to provide an image scrambling apparatus and an image descrambling apparatus capable of making a communication of secrecy by scrambling a digital image signal as well as variable-length-encoding the digital image signal. A transmitting apparatus 1 DCT-encodes an image signal V2 from an A/D converter 11 by means of a DCT encoder 12, and outputs signals of D1, D2, D3, D4, and the number of zero-runs D5. When it variable-length-encodes the D2 to D5 through a variable-length encoder 13 and outputs V3, it generates a series of PN signals K2 by means of a PN generator 18 on the basis of a PN initial value K1 from a PN initial value generator 17, adds the scalar quantumizing number D1 and K2 to each other by means of an adder 19 and outputs the scrambled D1, and then gives a scrambled image signal V4 through compositing the V3 and the D1.

Image signal scrambling apparatus and descrambling apparatus

An image forming apparatus is disclosed, in which a photo-sensitive member is exposed by exposure means accommodated therein, and development is done substantially simultaneously with the exposure. Three time elements, that is, charging time constant C, i.e., time until reaching of a predetermined charging potential on of the photo-sensitive member in a brushing contact region between the photo-sensitive member and a toner holder after the start of charging, exposure time constant R, i.e., time until the charging potential is attenuated by the exposure to a latent image potential, and development time or time T, during which the photo-sensitive member passes by the brushing contact region, are appropriately determined. It is found that more satisfactory image formation is possible by setting C, R and T such as to meet relations

Image forming apparatus and method for obtaining smooth charging,

An optical fiber includes an optical fiber element having a core layer and a cladding layer formed on the core layer, and a coating layer having a refractive index lower than at least the refractive index of the cladding layer, or a coating layer including at least one of a predetermined saturated higher fatty acid and alkylpolysiloxane.

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Tokyo, Japan

Akira Satoh