Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yuko Fujii

Takeshi Nagai

Masahiko Ito

Hiroyuki Ogino

Narutoshi Kanazawa

Koji Yoshino

Naofumi Nakatani

Takaiki Nomura

Tomotaka Nobue

Yoshiharu Omori

Takashi Hashida

Mitsuo Ebisawa

Shuji Itou

Tooru Sugimori

Hirosi Fukuda

Takahiro Sasaki

A drawer type heating apparatus includes a heating case forming a heating space, and an openable door adapted to be moved in a drawing manner relative to the heating case for opening and closing an opening portion, and includes a radio-wave transmission suppression portion which is faced to inner wall surfaces of the opening portion of the heating case, and placed such that there is a predetermined gap between the radio-wave transmission suppression portion and the entire periphery of the inner wall surfaces of the opening portion in the heating case, in a state where the openable door is closed, the radio-wave transmission suppression portion including a first radio-wave-propagation-direction suppression-area constituted by a surface with a plurality of steps, and a second radio-wave-propagation-direction suppression-area having suppression protruding portions which are periodically formed and placed in such a way as to face the first radio-wave-propagation-direction suppression-area with a predetermined interval.

Drawer-type heating apparatus

A piezoelectric element includes a piezoelectric composition pressure sensitive substance, a first electrode, a second electrode and a covering layer. The piezoelectric composition pressure sensitive substance includes a piezoelectric ceramic powder and a flexible organic polymer. The first and second electrodes are connected to the piezoelectric composition pressure sensitive substance and electrically insulated from each other. The covering layer is provided outside of the piezoelectric ceramic powder and suppresses absorption of the water by the piezoelectric ceramic powder.

Piezoelectric element comprising a covering layer that suppresses the absorption of water and method of manufacturing the same

An object detecting device can prevent a seizure of an object between an opening and an opening-closing unit for opening and closing the opening. The object detecting device includes a pressure-sensitive sensor disposed at one of the opening and the opening-closing unit, and judging means for judging the contact of the object with the pressure-sensitive sensor on the basis of an output signal of the pressure-sensitive sensor. The pressure-sensitive sensor includes pressure-sensitive means for generating an output signal depending on deformation, and support means for supporting the pressure-sensitive means at the one of the opening and the opening-closing unit, the support means including a vibration damping portion for damping vibration propagated to the pressure-sensitive means.

Pressure-sensitive sensor, object detecting device, and opening-closing device

In a pressure-sensitive sensor for detecting seizure of an object in the window frame or the like, support means ( ) is more flexible than a piezoelectric sensor ( ), and the support means ( ) is easily deformed together with the piezoelectric sensor ( ) without impeding the deformation of the piezoelectric sensor ( ), and an output signal is issued from the piezoelectric sensor ( ) depending on this deformation. Accordingly, when detecting the contact of an object with a pressure-sensitive sensor ( ) by a judging device, the pressure-sensitive sensor ( ) for generating an output signal of a sufficient magnitude for detection can be presented.

A polarization apparatus is provided wherein a piezoelectric body tube is wound around a first rotation drum and a second rotation drum and a coaxial flexible piezoelectric body is polarized while the piezoelectric body tube is wound. According to the polarization apparatus, polarization can be conducted except for the coaxial flexible piezoelectric body of the portion containing a defect and a defect existing in the piezoelectric body tube of a given length can also be detected before an outer electrode is formed.

Polarization apparatus and polarization method of coaxial flexible piezoelectric cable

Two kinds of pressure sensors using a piezoelectric composite comprising amorphous chlorinated polyethylene, crystalline chlorinated polyethylene and piezoelectric ceramic powder are disclosed. The first is a piezoelectric cable comprising an inner conductor of a metal helix, the volume within the metal helix is filled with fine insulating polymer fibers, a piezoelectric composite layer circumferentially surrounding the inner conductor, and an outer conductor of a metal film attached on a polymer membrane. The metal film is in contact with said composite layer but separated from the inner conductor and a protective jacket. The second type of pressure sensor is a planar sensor comprising a piezoelectric composite in a planar form sandwiched with conductors of two metal films attached on two polymer membranes, each metal film is in contact with the composite but separated from each other.

Piezoelectric pressure sensor

Growing community of inventors

Nara, Japan

Yuko Fujii