Tdk Corporation

Senko Advanced Components, Inc.

Ntt Advanced Technology Corporation

Nippon Telegraph and Telephone Corporation

Yoshiaki Haga

Masaru Uno

Akira Suzuki

Etsu Hashimoto

Kazutomo Imi

Nobuhiro Funakoshi

Mamoru Ishitani

Susumu Fujimori

Kazutoshi Ando

Yohei Omodaka

Masaya Takahashi

Taketoshi Matsuura

Hisao Tabei

Akira Nohara

An optical connector cleaning tool includes a fitting portion () fitted in the first or second hole () of a connection component () into which a compact dual core optical connector is fitted on one end side and a cleaning medium () projecting from the fitting portion (). The fitting portion () is formed to have a shape by which the fitting portion () is fitted in the first or second hole () in each of the first and second postures as postures shifted through 180° with respect to as the center the middle (P) of a virtual straight line connecting the centers of the two ferrules when viewed from an axial direction of the compact dual core optical connector. The fitting portion () contacts one ferrule in a state in which the fitting portion () is set in the first posture. The fitting portion () contacts the other ferrule in a state in which the fitting portion () is set in the second posture. There can be provided an optical connector cleaning tool by which the connection end faces of the compact dual core optical connector having two ferrules in one housing can be cleaned.

Optical connector cleaning tool and optical connector cleaning tool attachment

The present invention provides a driving apparatus capable of suppressing the operation noise. A driving apparatus comprises a piezoelectric element expanding and contracting in accordance with a driving signal; a supporting shaft connected to said piezoelectric element; a movable body frictionally engaged with said supporting shaft and capable of moving along said supporting shaft; and a driving portion applying said driving signal including a first driving signal which moves said movable body towards a first direction to said piezoelectric element, wherein said driving portion can repeatedly apply said first driving signal against said piezoelectric element by taking a first time in between, and said first driving signal comprises a main driving waveform group which moves said movable body to said first direction, and a sub driving waveform group which is placed after said main driving waveform group by having a second rest time shorter than said first time in between.

Method of driving a driving apparatus

A driving apparatus comprises a piezoelectric element () expanding and contracting in accordance with a driving pulse signal (), a supporting shaft () connected to said piezoelectric element, a movable body () frictionally engaged with said supporting shaft and capable of moving along said supporting shaft, and a driving portion () applying said driving pulse signal having a voltage value that corresponds to a driving voltage value (VD) to said piezoelectric element in order to cause relative movement of said movable body to said supporting shaft, wherein a driving voltage waveform () showing a time-varying of said driving voltage value has a first dropping portion () where said driving voltage value sharply drops from a first value (V) to a second value (V), a second dropping portion () where said driving voltage value slowly drops from said second value (V) to a third value (V) compared with said first dropping portion, and a third dropping portion () where said driving voltage value sharply drops from said third value (V) to a standard value (V) compared with said second dropping portion.

Driving apparatus

Growing community of inventors

Tokyo, Japan

Yoshiaki Haga