Abstract: An elastic member structure includes: a loop type inner plate; a loop type outer plate having the same center as the loop type inner plate; and a plurality of spiral elastic plates connected to the loop type inner plate and the loop type outer plate and having given elasticity, wherein the loop type outer plate includes a plurality of first areas having areas connected to the ends of the plurality of spiral elastic plates and a plurality of second areas formed between the plurality of first areas and the outer size of each first area of the loop type outer plate is greater than the outer size of each second area thereof.

Abstract: A linear vibration generator including a plate type spring each having bent portions includes: a case for covering top and side portions thereof; a bracket coupled to the underside of the case; a coil fixed to one side of a top surface of the bracket and receiving external power from an FPCB; a plate type spring having bent portions and configured to allow one end thereof to be fixed to a vibrator; and the vibrator having a weight fixed to one end of the plate type springs and a magnet insertedly fixed to a hollow portion of the weight.

Abstract: A linear vibration motor includes: a casing having an upper casing whose bottom is open and a lower casing coupled to the upper casing to form an internal space therein; a stator disposed on top of the lower casing in the internal space formed by the casing; an elastic member disposed around the stator in the internal space formed by the casing in such a manner as to allow one surface thereof to be coupled to the lower casing; an oscillator mounted on the other surface of the elastic member and having a ring-shaped magnet disposed around the stator; and a magnetic fluid applied to top of the ring-shaped magnet, wherein the upper casing includes a ring-shaped protrusion formed on the inner surface facing the lower casing, and an inner diameter of the ring-shaped protrusion is greater than an outer diameter of the ring-shaped magnet.

Abstract: A technology for improving a device structure so that an external impact does not occur in a coil in order to solve a problem in that several attachments, such as coil, included in a linear vibration generator are separated or broken due to a small impact test or drop test on the linear vibration generator. The attachments, such as coil, included in the linear vibration generator can be prevented from being disconnected, separated or broken due to the execution of a small impact test and drop test on the linear vibration generator.

Abstract: The present invention relates to a three-dimensional negative pressure stimulator module capable of performing customized composite stimulation for the improvement of skin functions that applies three-dimensional negative pressure stimulation as well as composite stimulation such as electric current stimulation, light stimulation, and thermal stimulation, which is helpful in improving functions of the skin, to skin compositively, and further has a function of sensing a skin state, thereby performing customized composite stimulation. The three-dimensional composite stimulator module includes: a negative pressure cup; and at least one diaphragm provided along the transmission path of the negative pressure of the negative pressure cup, wherein at least any one of negative pressure stimulation, light stimulation, thermal stimulation, and electrical stimulation is transmitted compositively to the skin or subcutaneous tissues.

Abstract: A linear vibration motor includes: a casing having an upper casing whose bottom is open and a lower casing coupled to the upper casing to form an internal space therein; a stator disposed on top of the lower casing in the internal space formed by the casing; an elastic member disposed around the stator in the internal space formed by the casing in such a manner as to allow one surface thereof to be coupled to the lower casing; an oscillator mounted on the other surface of the elastic member and having a ring-shaped magnet disposed around the stator; and a magnetic fluid applied to top of the ring-shaped magnet, wherein the upper casing includes a ring-shaped protrusion formed on the inner surface facing the lower casing, and an inner diameter of the ring-shaped protrusion is greater than an outer diameter of the ring-shaped magnet.

Abstract: An elastic member structure includes: a loop type inner plate; a loop type outer plate having the same center as the loop type inner plate; and a plurality of spiral elastic plates connected to the loop type inner plate and the loop type outer plate and having given elasticity, wherein the loop type outer plate includes a plurality of first areas having areas connected to the ends of the plurality of spiral elastic plates and a plurality of second areas formed between the plurality of first areas and the outer size of each first area of the loop type outer plate is greater than the outer size of each second area thereof.

Abstract: A linear vibration generator including a plate type spring each having bent portions includes: a case for covering top and side portions thereof; a bracket coupled to the underside of the case; a coil fixed to one side of a top surface of the bracket and receiving external power from an FPCB; a plate type spring having bent portions and configured to allow one end thereof to be fixed to a vibrator; and the vibrator having a weight fixed to one end of the plate type springs and a magnet insertedly fixed to a hollow portion of the weight.

Abstract: A technology for improving a device structure so that an external impact does not occur in a coil in order to solve a problem in that several attachments, such as coil, included in a linear vibration generator are separated or broken due to a small impact test or drop test on the linear vibration generator. The attachments, such as coil, included in the linear vibration generator can be prevented from being disconnected, separated or broken due to the execution of a small impact test and drop test on the linear vibration generator.

Abstract: The present invention relates to a three-dimensional negative pressure stimulator module capable of performing customized composite stimulation for the improvement of skin functions that applies three-dimensional negative pressure stimulation as well as composite stimulation such as electric current stimulation, light stimulation, and thermal stimulation, which is helpful in improving functions of the skin, to skin compositively, and further has a function of sensing a skin state, thereby performing customized composite stimulation. The three-dimensional composite stimulator module includes: a negative pressure cup; and at least one diaphragm provided along the transmission path of the negative pressure of the negative pressure cup, wherein at least any one of negative pressure stimulation, light stimulation, thermal stimulation, and electrical stimulation is transmitted compositively to the skin or subcutaneous tissues.

Abstract: 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.

Abstract: 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.

Abstract: A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.

Abstract: A vibration actuator excites a mass member by interaction between an electric field of a vibration coil provided in an inner space of a case and a magnetic field of a magnetic field unit disposed corresponding to the vibration coil. The vibration actuator has an elastic wire having a wire body fixed to the outer surface of the mass member and elastic ends fixed to the inner surface of the case. The elastic wire is connected between the case and the mass member for elastically supporting mass member.

Abstract: A linear actuator is disclosed. A linear actuator that includes a first magnet and a second magnet secured with a predetermined gap in-between each other, a vibration magnet part interposed between the first magnet and the second magnet which is magnetized to repulse both the first magnet and the second magnet, and an electromagnet part interposed adjacent to the vibration magnet part that changes a magnetic field formed around the vibration magnet part, may provide high efficiency, by forming a magnetic spring from the repulsive forces of magnets and using the resonance of the magnetic spring.

Abstract: A multi-actuator selectively performing audio and vibration generating operations is made by injection molding process of inserting a spring into a case forming an exterior appearance of the multi-actuator. The spring is inserted into the case using an exterior structure integrally formed with the spring, and the exterior structure is cut off from the case after the injection process is finished. In the method of inserting the spring into the case, a plurality of guide holes are formed on the exterior structure and outside springs in a spring array state, and the springs are disposed and inserted into the injection-molding in the array state so that a productivity is improved. Since interference between the springs and the injection molding, deformation of the springs is prevented.

Abstract: The present invention relates to a multi-function actuator, in which a voice coil vibrates a sound-generating diaphragm in response to an audio signal. A vibration coil is placed on a central axis coaxial with the voice coil for generating vibration in response to the audio signal or a vibration signal. A vibration unit includes a magnet for generating a magnetic field to both of the voice coil and the vibration coil and a yoke having a predetermined mass. The vibration unit is vertically vibrated by an electromagnetic force produced from at least one of the voice coil and the vibration coil. A switch selectively applies the audio signal to the vibration coil. The multi-function actuator can prevent the vibration of the vibration unit during sound generation in response to user's switch selection.

Abstract: A vibration-sound generating device and yoke thereof are described. The vibration-sound generating device comprises a diaphragm, a vibration part comprising a magnet and a yoke, which is positioned apart from the diaphragm by a desired distance, a suspension elastically supporting the vibration part, a supporting part supporting the diaphragm and the suspension, and a voice coil electromagnetically driving the diaphragm and the vibration part. The yoke of the invention has higher specific gravity and magnetic permeability than iron. So that it can improve performance of vibration and sound device.

Abstract: Disclosed is a multi-functional actuator comprising: a housing having an internal space and a groove in the inner side; a sound-generating diaphragm with an outer end fixed to the upper end of said housing; a voice coil fixed to the bottom of said diaphragm; a vertically magnetized magnet; an upper plate attached to said magnet for forming a magnet circuit; a yoke for forming the magnetic circuit together with said magnet; a weight for defining a vibration body together with said yoke; a leaf spring fixed into said grooves of the housing and having a portion of curvature; and a vibrating coil installed in said housing for generating vibration using a magnetic flux formed in a magnetic system. A structure that can prevent deformation of the leaf spring before/after dropping to a mobile communication terminal such as mobile telephone and pager is provided thereby to prevent reliability degradation of the actuator in use for the mobile communication terminal and enhance vibration features thereof.

Abstract: A method of correcting a resonance frequency in a vibration speaker generating acoustic sound and vibration includes adjusting the actual resonance frequency to a higher resonance frequency by limiting a predetermined portion of an elastic member installed in a case to an inside of the case to increase the resonance frequency when the actual resonance frequency is not identical to nor less than the desired resonance frequency, thereby adjusting an actual resonance frequency to be identical to a desired resonance frequency, and adjusting the actual resonance frequency to a lower resonance frequency by cutting off another predetermined portion of the elastic member to decrease the resonance frequency when the actual resonance frequency is not identical to nor greater than the desired resonance frequency, thereby adjusting an actual resonance frequency to be identical to a desired resonance frequency.