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    2.
    发明专利
    未知

    公开(公告)号：DE69914040D1

    公开(公告)日：2004-02-12

    申请号：DE69914040

    申请日：1999-10-11

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： NAMBA AKIHIKO ,  OKANO MASAYUKI ,  KOMATSU ATSUSHI ,  TOMITA YOSHIHIRO ,  KAWASAKI OSAMU

    IPC: B41J2/14 ,  B41J2/16

    Abstract: A liquid injection device has a liquid pressurizing chamber (109) having one or a plurality of apertures; a liquid injection port (110) provided at a part of the liquid pressurizing chamber (109); a liquid pressurizing member (103) arranged adjacent the liquid pressurizing chamber (109); and a liquid passage (108) arranged adjacent the liquid pressurizing chamber (109), within the aperture, a peripheral edge portion of the aperture located at a position opposite to the liquid pressurizing member (103), and the liquid pressurizing member (103) being arranged to be apart from each other at a gap (111) with a predetermined size; and liquid being injected through the liquid injection port (110) by driving the liquid pressurizing member (103) to thereby pressurize the liquid supplied from the liquid passage (108) into the liquid pressurizing chamber (109).

    4.
    发明专利
    未知

    公开(公告)号：DE69817453D1

    公开(公告)日：2003-10-02

    申请号：DE69817453

    申请日：1998-06-04

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： OTSUCHI TETSURO ,  TAKEDA KATSU ,  MORITOKI KATSUNORI ,  KAWASAKI OSAMU ,  KATO JUNICHI ,  KAWAKITA KOUJI ,  KAGATA HIROSHI

    IPC: G01P15/09 ,  G01P21/00

    Abstract: An acceleration sensor has a piezoelectric element which includes a piezoelectric member layer in which a plurality of piezoelectric members are stacked and electrodes which are disposed in major opposed surfaces of the piezoelectric member layer; and a support member for supporting the piezoelectric element, wherein some piezoelectric members of the piezoelectric member layer are polarized, the electrodes are disposed in the both surfaces of the polarized piezoelectric members, capacitors which are formed by the polarized piezoelectric members and the electrodes in the both surfaces of the polarized piezoelectric members are connected parallel to each other. The electrode may be split into a driving electrode for testing the sensor and a detecting electrode. The driving electrode may further be split into two parts which are electrically connected to each other, the two parts of the driving electrode being located at the edges of the surface while the detection electrode is located at the center of the surface.

    7.
    发明专利
    未知

    公开(公告)号：DE69421002T2

    公开(公告)日：2000-05-25

    申请号：DE69421002

    申请日：1994-05-27

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： KAWASAKI OSAMU ,  SHINTAKU HIDENOBU ,  SUZUKI SHIGEO ,  NAGASAWA MASAHIRO ,  FUKUSHIMA HIROSHI ,  TAJIKA HIROFUMI

    IPC: B06B1/06 ,  H03H9/05 ,  H03H9/17 ,  H01L41/02 ,  G01S7/521

    Abstract: Protrusions made of an electrically conductive material such as a metal or ceramic are formed around a node point or a node line of vibrations of a piezoelectric plate on two principal planes thereof with a spraying process. The piezoelectric plate is held at the protrusions with leaf springs on the two principal planes. Thus, the protrusions of a small surface area are formed without deteriorating the piezoelectric plate. The piezoelectric plate can be held stably without deteriorating vibration characteristics. An alternating voltage is applied to electrodes of the piezoelectric plate through the electrically conductive protrusions. Because a spraying process is used, the protrusions can be formed thickly in a small area precisely and it held surely and reliably with good mechanical strength of the protrusions.

    9.
    发明专利
    未知

    公开(公告)号：DE69833466T8

    公开(公告)日：2007-01-18

    申请号：DE69833466

    申请日：1998-05-29

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： TAGUCHI YUTAKA ,  EDA KAZUO ,  KAWASAKI OSAMU ,  SEKI SHIN-ICHI ,  ONISHI KEIJI ,  SATO HIROKI

    IPC: H03H9/64 ,  H03H9/72

    Abstract: The filter circuit is a filter circuit having plural passing bands, comprising a first filter 701 having a first passing band, and a second filter 702 having a second passing band, with their inputs and outputs connected mutually, and these filters connected in parallel, in which inductor elements 703-1, 703-2 are connected in series to a terminal of the first filter 701 to which the second filter 702 is connected, and capacitor elements 704-1, 704-2 are connected in series to a terminal of the second filter 702 to which the first filter 701 is connected.

    10.
    发明专利
    未知

    公开(公告)号：DE69723148D1

    公开(公告)日：2003-08-07

    申请号：DE69723148

    申请日：1997-04-15

    Applicant: MATSUSHITA ELECTRIC IND CO LTD

    Inventor： SUGIMOTO MASATO ,  TAKEDA KATSU ,  TOMITA YOSHIHIRO ,  KAWASAKI OSAMU

    IPC: H03H3/04 ,  H03H9/02 ,  H03H9/17 ,  H03H9/56

    Abstract: A wafer with a reversed domain is prepared for two piezoelectric single crystal plates 11 and 12 having about the same thickness as each other by using direct bonding without any adhesive. Then, driving electrodes 13 are formed on two principal planes of the wafer with a reversed domain to provide a piezoelectric resonator. A piezoelectric resonator having the structure with a reverses polarization and using odd-order vibration modes vibrating with a fundamental wave has a wavelength of a thickness thereof suppresses scattering of the thickness of the domains with a reversed polarization. In the direct bonding, the axes of the spontaneous polarization of the two piezoelectric single crystal plates are reverse to each other and crystalline axes other than the axes of polarization are shifted intentionally by an angle other than zero. Thus, spurious modes are suppressed in a simple way.

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