Vibration generating device
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsDong Su MOON, Yeon Ho SON, Kyung Su PARK, Joon CHOI, Hwa Young OH
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Abstract
There is provided a vibration generating device including: a housing having an internal space; a vibration member having one end fixedly attached to the housing; a piezoelectric element installed on the vibration member; and a mass body fixedly attached to the vibration member, wherein the vibration member includes an installation part on which the piezoelectric element is installed, and an extension part extended from at least one side surface of the installation part, and a maximum displacement portion of the vibration member is changed depending on a vibration mode.
Claims17
A vibration generating device comprising:
- a housing having an internal space;
- a vibration member of which one end is fixedly attached to the housing;
- a piezoelectric element installed on the vibration member;
- and
- a mass body fixedly attached to the vibration member,
- wherein the vibration member includes an installation part on which the piezoelectric element is installed and an extension part extended from at least one side surface of the installation part, and
- a maximum displacement portion of the vibration member is changed depending on a vibration mode.
A vibration generating device comprising:
- a housing having an internal space;
- a vibration member including an installation part having one end fixedly attached to the housing and an extension part extended from at least one side surface of the installation part;
- a piezoelectric element installed on the vibration member;
- and
- a mass body bonded to the extension part of the vibration member,
- wherein the vibration member is deformed in a plurality of vibration modes, and
- a difference between resonance frequencies in the plurality of vibration modes is 50 Hz or more.
A vibration generating device comprising:
- a housing having an internal space;
- an installation member fixedly attached to one end portion of the internal space of the housing;
- a vibration member including an installation part having one end portion fixedly attached to the installation member and an extension part extended from at least one side surface of the other end portion of the installation part;
- a piezoelectric element installed on the vibration member;
- and
- a mass body fixedly attached to the vibration member,
- wherein the extension part includes a width direction extension plate extended from one side surface of the installation part, and a length direction extension plate extended from a distal end of the width direction extension plate in a length direction of the installation part,
- when the vibration member is vibrated in a first vibration mode by the piezoelectric element, the other end portion of the installation part becomes a maximum displacement portion, and
- when the vibration member is vibrated in a second vibration mode by the piezoelectric element, a distal end of the length direction extension plate of the extension part becomes a maximum displacement portion.
Dependencies are inferred from the claim text.