Patent application number | Description | Published |
20110193426 | Vertical vibrator - There is provided a vertical vibrator according to an exemplary embodiment of the present invention. The vertical vibrator may include: a casing having an inner space of a predetermined size formed therein and a step portion protruded to be stepped from an upper edge thereof; a magnetic unit including a yoke disposed in the inner space of the casing and a magnet fixed by being magnetized on a closed inner surface of the yoke in a vertical direction; an elastic member including an outer ground portion fixed to the step portion and an inner ground portion fixed to the magnetic unit; and a coil for generating vibrations disposed on the lower portion of the magnetic unit and generating electromagnetic force by interaction with the magnetic unit when power is applied thereto. | 08-11-2011 |
20110278959 | LINEAR VIBRATOR - There is provided a linear vibrator including: a housing having an internal space formed therein; a magnetic field unit including a yoke disposed in the internal space and having a magnet and a magnet insertion part formed therein, and interacting with a coil to which power is applied to linearly move in the internal space, the magnet insertion part determining an insertion position of the magnet; and an elastic member disposed in a space between the housing and the magnetic field unit and elastically supporting linear movement of the magnetic field unit. | 11-17-2011 |
20110309691 | Linear vibrator and electronic device having the same - There is provided a linear vibrator including a housing providing an internal space; a magnetic field part having a yoke disposed in the internal space and a magnet magnetized on a surface of the yoke and vibrating in the internal space by an interaction with a coil to which power is applied; an elastic member connecting the yoke and the housing and allowing the magnetic field part to be elastically supported in the internal space; and a magnetic flux collecting part collecting magnetic flux of the magnetic field part and allowing the magnetic field part to move towards the coil. | 12-22-2011 |
20120133219 | APPARATUS FOR GENERATING VIBRATIONS - There is provided an apparatus for generating vibrations, including: a housing forming an internal space; a flexible member disposed in the internal space of the housing and made of a soft material; a magnetic field unit disposed to be opposite to the flexible member and including a yoke having a magnet mounted therein to be moved, the magnet electromagnetically interacting with a coil; and a damper provided in the internal space of the housing to be disposed outside the coil and reducing movement sound generated due to the tilting of the yoke during upward and downward movement of the yoke. | 05-31-2012 |
20120133220 | APPARATUS FOR GENERATING VIBRATIONS - Disclosed is an apparatus for generating vibrations. The apparatus for generating vibrations includes a housing forming an internal space; a flexible member mounted in the internal space of the housing and made of a soft material, a magnetic field unit disposed to be opposite to the flexible member and including a yoke having a magnet mounted therein to be moved, the magnet electromagnetically interacting with the coil, and a damper suppressing generation of movement sound during movement of the yoke together with the flexible member. | 05-31-2012 |
20130055727 | COOLING UNIT - Disclosed herein is a cooling unit including a case, a magnet which is mounted on a lower portion of the case, a magnetic fluid which is provided on a lower portion of the magnet to absorb heat, and a bracket which supports a lower portion of the magnetic fluid. | 03-07-2013 |
20130300257 | PIEZOELECTRIC VIBRATION MODULE - Disclosed herein is a piezoelectric vibration module including a vibration plate that is surrounded by an upper case and a lower case, and includes a stopper capable of preventing direct collision between a piezoelectric element and an internal constituent member, for example, a lower case while vibrating linearly therein. | 11-14-2013 |
20140159546 | PIEZOELECTRIC ACTUATOR AND APPARATUS FOR GENERATING VIBRATIONS INCLUDING THE SAME - There is provided a piezoelectric actuator including: positive electrode layers and negative electrode layers iteratively alternately vertically laminated; piezoelectric element layers interposed between the positive electrode layers and the negative electrode layers, respectively; a positive electrode (or anode) connection pillar provided in a position corresponding to less than 50% of maximum displacement in the event of driving and penetrating the electrode layers and the piezoelectric element layers to connect the positive electrode layers; and a negative electrode (or cathode) connection pillar provided in a position corresponding to less than 50% of maximum displacement in the event of driving and penetrating the electrode layers and the piezoelectric element layers to connect the negative electrode layers. | 06-12-2014 |