US20160233411A1 - Vibration generating apparatus - Google Patents
Vibration generating apparatus Download PDFInfo
- Publication number
- US20160233411A1 US20160233411A1 US15/131,242 US201615131242A US2016233411A1 US 20160233411 A1 US20160233411 A1 US 20160233411A1 US 201615131242 A US201615131242 A US 201615131242A US 2016233411 A1 US2016233411 A1 US 2016233411A1
- Authority
- US
- United States
- Prior art keywords
- mass body
- piezoelectric element
- generating apparatus
- vibration generating
- elastic member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000003139 buffering effect Effects 0.000 claims description 19
- 238000003780 insertion Methods 0.000 claims description 12
- 230000037431 insertion Effects 0.000 claims description 12
- 230000005489 elastic deformation Effects 0.000 description 12
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
- B06B1/12—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses
- B06B1/14—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving reciprocating masses the masses being elastically coupled
-
- H01L41/094—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
-
- H01L41/053—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
Abstract
A vibration generating apparatus includes a mass body; an, elastic member coupled to the mass body; and a piezoelectric element disposed on one surface of the elastic member facing the mass body, wherein a surface of the mass body facing the piezoelectric element has a shape that prevents contact between the piezoelectric element and the mass body.
Description
- This application is a division of U.S. patent application Ser. No. 14/199,937, filed Mar. 6, 2014, which claimed benefit of U.S. Patent Application No. 61/803,602, filed on Mar. 20, 2013, and priority to Korean Patent Application No 10-2013-0137516, filed on Nov. 13, 2013, the disclosures of which are hereby incorporated by reference in their entireties herein.
- 1. Field of the Invention
- Unless otherwise indicated herein, the materials described in this section are not prior art to the claims herein and are not admitted to be prior art by inclusion in this section. Embodiments of the present disclosure generally relate to a vibration generating apparatus.
- 2. Description of Related Art
- A vibration generating apparatus converts electrical energy into mechanical vibrations using the principle of electromagnetic force. The vibration generating apparatus may be mounted in, for example, mobile phones, and the like, to thereby be used for silently notifying a user of call reception by transferring vibrations. In accordance with the rapid growth in the market for mobile devices such as the mobile phones, and the like, and with the trend for the addition of functionality to mobile devices, such mobile devices may be relatively small and have high quality. The demand for development of a vibration generating apparatus having a new structure capable of overcoming disadvantages of existing vibration generating apparatuses and quality has been improved.
- Further, as the release of smartphones, among other mobile phones has rapidly increased, a touchscreen scheme has been adopted for use therein, such that a vibration motor has been used in order to generate vibrations at the time a touchscreen is touched by a user. Examples of preferred performance of the vibrations associated with the touchscreen are as follows. First, since vibrations generated at the time a touchscreen is touched are generated frequently than vibrations generated at the time of call reception, an operational lifespan of a vibration generating apparatus may need to be increased. Second, in order to increase user satisfaction when a user feels vibrations when touching a touchscreen, a response speed of the vibrations may be increased in accordance with a touch speed of the touchscreen.
- For example, a piezo haptic actuator may be used Such a piezo haptic actuator may use a principle of an inverse piezoelectric effect in which displacement is generated when a voltage is applied to a piezo element, that is, a principle of allowing a weight of a mover to be moved by the generated displacement to generate vibrations.
- The vibrator may have the following exemplary features. A bandwidth of a frequency capable of obtaining a predetermined level of vibrational force or more may be wide, such that stable vibration characteristics may be implemented. Vibrations having low and high frequencies rather than a single frequency in a predetermined frequency range may be variously used. In addition, since the vibrator may implement rapid operational response characteristics, haptic vibrations may be implemented in a mobile device such as a mobile phone, or the like.
- Some embodiments of the present disclosure may provide a vibration generating apparatus capable of preventing damage to a piezoelectric element.
- According to some embodiments of the present disclosure, a vibration generating apparatus may include a vibration transferring member transferring vibrations to outside the vibration generating apparatus, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating in response to vibrations of the elastic member, and a piezoelectric element installed on one surface of the elastic member so as to be disposed to face the mass body. A lower surface of the mass body may have step parts in order to prevent contact between the mass body and the piezoelectric element. The lower surface of the mass body in which the step parts are formed and the piezoelectric element may be disposed so as to be spaced apart from each other by a predetermined distance.
- The mass body may have an inclined surface formed on the lower surface thereof, wherein the inclined surface is inclined upwardly from the step part of the mass body toward a distal end thereof.
- The elastic member may include a bottom plate having both end portions fixed to the vibration transferring member.
- The bottom plate may have one or more openings formed therein in order to expose an electrode formed on the piezoelectric element.
- The bottom plate may have at least one elastic deformation assisting hole formed between the opening of the bottom plate and a distal end of the bottom plate so that elastic deformation of the bottom plate is facilitated.
- The openings and the elastic deformation assisting holes may be formed on both sides of the bottom plate so as to be symmetrical with regard to each other based on a center line of the bottom plate in a length direction thereof.
- The bottom plate may have at least one support protrusion formed thereon in order to provide an installation position for the piezoelectric element.
- The elastic member may further include extension plates extended from both side surfaces of a central portion of the bottom plate.
- The extension plates may include support plate parts contacting front and rear surfaces of the mass body, respectively, and connection parts coupling the support plate parts and the bottom plate to each other.
- The support plate parts may have one or more support jaws extended therefrom in order to support the lower surface of the mass body. The supporting jaws may be inserted into support jaw insertion grooves formed on the lower surface of the mass body.
- The vibration generating apparatus may further include a buffering member installed on the other surface of the elastic member so as to be disposed below the piezoelectric element.
- A lower case configuring the vibration transferring member may have at least one passage hole formed therein so that the buffering member passes therethrough when the elastic member vibrates.
- The lower case may have one or more protrusion parts formed thereon in order to support both end portions of the elastic member.
- The vibration generating apparatus may further include a circuit board connected to the piezoelectric element and installed on an upper surface of the elastic member.
- The elastic member may have an opening formed therein in order to expose an electrode formed on a lower surface of the piezoelectric element externally. The circuit board may be provided with an insertion hole, into which the electrode of the piezoelectric element is inserted, and be provided with a piezoelectric element connection part inserted into the opening.
- The circuit board may be provided with an external exposed part having power supply connection terminals formed thereon, disposed at one side of the piezoelectric element connection part, and bent.
- The vibration generating apparatus may further include a damage preventing member installed on at least one of an upper surface of the piezoelectric element and/or the lower surface of the mass body disposed so as to face the piezoelectric element and preventing damage to the piezoelectric element.
- The damage preventing member may be formed of a material having elasticity.
- The vibration transferring member may include a lower case having a plate shape and an upper case coupled to the lower case and having an internal space.
- The vibration generating apparatus may further include one or more damper members installed on an inner surface of the upper case, wherein the damper members are inserted into damper member insertion grooves formed on an upper surface of the mass body when the elastic member vibrates.
- The mass body may have a curved surface formed on the lower surface thereof, wherein the curved surface is curved from the step part of the mass body toward a distal end of the mass body.
- The curved surface may have a curvature equal to or larger than that of the elastic member in the state in which the elastic member is maximally deformed at the time of being deformed downwardly.
- According to some embodiments of the present disclosure, a vibration generating apparatus may include a vibration transferring member transferring vibrations to outside the vibration generating apparatus, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating together with the elastic member when the elastic member vibrates, a piezoelectric element installed on one surface of the elastic member so as to be disposed to face the mass body, a circuit board connected to the piezoelectric element and installed on an upper surface of the elastic member, and a damage preventing member installed on at least one of an upper surface of the piezoelectric element or a lower surface of the mass body disposed so as to face the piezoelectric element and preventing damage to the piezoelectric element. The elastic member may have an opening formed therein in order to expose an electrode formed on a lower surface of the piezoelectric element. The circuit board may be provided with a piezoelectric element connection part inserted into the opening. The piezoelectric element may be disposed on the piezoelectric element connection part of the circuit board in the opening.
- The circuit board may be provided with an external exposed part having one or more power supply connection terminals formed thereon, disposed at one side of the piezoelectric element connection part, and bent.
- The damage preventing member may be formed of a material having elasticity.
- According to some embodiments of the present disclosure, a vibration generating apparatus may include a vibration transferring member transferring vibrations to outside of the vibration generating apparatus, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating in response to vibrations of the elastic member when the elastic member vibrates, and a piezoelectric element installed on one surface of the elastic member. The elastic member may include a bottom plate having end portions fixed to the vibration transferring member. The bottom plate may have at least one support protrusion formed thereon in order to support both end portions and both side surfaces of the piezoelectric element.
- The bottom plate may have one or more openings formed therein in order to expose an electrode formed on the piezoelectric element. The number of support protrusions may be plural. At least two of support protrusions may be disposed at both end portions of the openings.
- According to some embodiments of the present disclosure, a vibration generating apparatus may include a vibration transferring member transferring vibrations to outside the vibration generating apparatus, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating in response to vibrations of the elastic member, and a piezoelectric element installed on one surface of the elastic member so as to be disposed to face the mass body.
- According to some embodiments of the present disclosure, a vibration generating apparatus may include a vibration transferring member transferring vibrations externally, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating in response to vibrations of the elastic member, and piezoelectric elements installed on both surfaces of the elastic member, any one of the piezoelectric elements being disposed so as to face the mass body. The mass body may have one or more step parts formed in a lower surface thereof in order to prevent contact between the mass body and the piezoelectric element. The lower surface of the mass body in which the step parts are formed and the piezoelectric element may be disposed so as to be spaced apart from each other by a predetermined distance.
- According to some embodiments, a vibration generating apparatus may comprise amass body, an elastic member coupled to the mass body, and a piezoelectric element disposed on one surface of the elastic member facing the mass body. A surface of the mass body facing the piezoelectric element may have a shape that prevents contact between the piezoelectric element and the mass body.
- The surface of the mass body may have one or more stepped parts formed to correspond to the piezoelectric element.
- The surface of the mass body may comprise an inclined surface from the stepped part toward a distal end of the mass body.
- The elastic member may comprise a bottom plate, and support plate parts extending vertically from the bottom plate and supporting the mass body. The piezoelectric element may be installed on a surface of the bottom plate facing the mass body.
- The vibration generating apparatus further comprise a case transferring vibrations to outside the vibration generating apparatus and coupled with the elastic member.
- The vibration generating apparatus may further comprise one or more damper members attached on an inner surface of the case.
- The vibration generating apparatus may further comprise one or more damage preventing members disposed on a surface of the piezoelectric element facing the mass body.
- The vibration generating apparatus may further comprise one or more buffering members attached on another surface of the elastic member.
- The case may have at least one opening through which the buffering members are moveable.
- An inner surface of the ease may comprise one or more protrusions supporting end portions of the elastic member.
- The vibration generating apparatus may further comprise a circuit board connected to the piezoelectric element and disposed on the one surface of the elastic member.
- The electric member may comprise one or more openings exposing an electrode formed on a surface of the piezoelectric element. The circuit board may comprise an insertion hole, into which the electrode is inserted, and a piezoelectric element connection part inserted into the openings.
- The circuit board may comprise an external part extended to outside of the case and having a power supply connection terminal.
- The elastic member may have one or more holes.
- The surface of the mass body may comprise a curved surface between the stepped part and a distal end of the mass body.
- Embodiments of the present disclosure will be more clearly understood from the following description taken in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a schematic cross-sectional view showing a vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 2 is an exploded perspective view showing the vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 3 is a perspective view showing an upper case included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 4 is a perspective view showing a lowercase included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure, -
FIG. 5 is a plan view showing an elastic member included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure, -
FIG. 6 is a perspective view showing the elastic member included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 7 is a bottom perspective view showing a piezoelectric element included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 8 is a perspective view showing amass body included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure; -
FIG. 9 is a perspective view showing a circuit board included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure; and -
FIG. 10 is a schematic cross-sectional view showing a vibration generating apparatus according to another exemplary embodiment of the present disclosure. - Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use contemplated. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like elements. It will also be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. As used in this description and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
-
FIG. 1 is a schematic cross-sectional view showing a vibration generating apparatus according to an exemplary embodiment of the present disclosure.FIG. 2 is an exploded perspective view showing the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 and 2 , avibration generating apparatus 100 according to an exemplary embodiment of the present disclosure may include avibration transferring member 120, anelastic member 140, apiezoelectric element 160, amass body 180, acircuit board 200, a bufferingmember 220, adamper member 240, and adamage preventing member 260 by way of example. - Terms with respect to directions are defined below. As viewed in
FIG. 3 , a length direction refers to an X direction and a width direction refers to a Y direction. In addition, a height direction refers to a Z direction. The terms defined above are used below, having the same meaning as the defined meaning. That is, in describing the respective components, the terms described above indicate the same directions as the defined directions. - The
vibration transferring member 120 may be configured to transfer vibrations externally and may have, for example, but not limited to, a rectangular parallelepiped shape. In addition, thevibration transferring member 120 may include anupper case 122 and alower case 130. For example, theupper case 122 may have a box shape which has an internal space, and thelower case 130 may have a plate shape. -
FIG. 3 is a perspective view showing an upper case included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 through 3 , theupper case 122 of thevibration transferring member 120 may have a box shape, but a lower portion of theupper case 122 may be opened. Theupper case 122 may include afront plate 123,side plates rear plate 126, and anupper plate 127. The height of at least one ofside plates front plate 123 and therear plate 126 in a height direction to form an opening. - The
circuit board 200 may be exposed outside thevibration transferring member 120 through the opening formed at an end portion of theupper case 122. - The
front plate 123 and/or therear plate 126 may have a single or a plurality ofgrooves 129 formed therein in order to allow theupper case 122 to be fixedly coupled to thelower case 130. - The
upper plate 126 may havevent holes 128 formed therein in order to allow air to flow to an inner portion or an outer portion of thevibration transferring member 120 when theelastic member 140 vibrates. -
FIG. 4 is a perspective view showing a lower case included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 through 4 , thelower case 130 may have a plate shape. Thelower case 130 may haveprotrusion parts 132 formed on or near both end portions thereof, respectively, in order to support both end portions of theelastic member 140. For instance, theprotrusion part 132 may be formed by indenting and have a rectangular pillar shape. - At least one of both end portions of the
lower case 130 may be provided with anextension plate 133 extended so as to protrude from theupper case 122 in the length direction thereof. Theextension plate 133 may provide a seating surface for an exposed portion of thecircuit board 200. - In addition, the
lower case 130 may have apassage hole 134 formed in a central portion thereof so that the bufferingmember 220 may pass therethrough. Thepassage hole 134 may serve as a movement path through which thebuffering member 220 installed on theelastic member 140 descends downwardly of thelower case 130 when theelastic member 140 vibrates. Therefore, a displacement amount of theelastic member 140 may be increased. - In addition, the
passage hole 134 may have various shapes depending on a shape of the bufferingmember 220. - The
lower case 130 may havecoupling wall parts 136 formed in order to increase coupling force between thelower case 130 and theupper case 122. Outer surfaces of thecoupling wall parts 136 may contact inner surfaces of thefront plate 123 and therear plate 126 to be configured to increase contact area between theupper case 122 and thelower case 130 when theupper case 122 and thelower case 130 are coupled to each other. - In addition, the
lower case 130 may havegrooves 138 formed therein so as to correspond to the plurality ofgrooves 129 formed in theupper case 122. Thegrooves 138 of thelower case 130 and thegrooves 129 of theupper case 122, which are to facilitate assembling between thelower case 130 and theupper case 122, may not be formed in thelower case 130 and theupper case 122. -
FIG. 5 is a plan view showing an elastic member included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure.FIG. 6 is a perspective view showing the elastic member included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 through 6 , theelastic member 140 may have end portions fixed to thevibration transferring member 120. For example, theelastic member 140 may be fixed to theprotrusion parts 132 of thelower case 130. Therefore, theelastic member 140 may have fixed ends at both end portions thereof, respectively. Although theelastic member 140 is fixed to thelower case 130 by way of example in an exemplary embodiment of the present disclosure, the present disclosure is not limited thereto. Theelastic member 140 may be installed in theupper case 122. - In addition, the
elastic member 140 may be installed in thevibration transferring member 120 so that both end portions of theelastic member 140 are interposed between theupper case 122 and thelower case 130. - The
elastic member 140 may include abottom plate 142 andextension plates 144, as shown inFIGS. 5 and 6 . Thebottom plate 142 may include a plurality ofsupport protrusions piezoelectric element 160 on theelastic member 140. - Two
support protrusions 142 a may support both side surfaces of thepiezoelectric element 160, and theother support protrusions 142 b may support other two side surfaces (front and rear surfaces) of thepiezoelectric element 160. 160. - Therefore, the
piezoelectric element 160 may be installed at a predetermined position, and coupling force between thebottom plate 142 and thepiezoelectric element 160 may be increased to facilitate elastic deformation of thebottom plate 142 at the time of deformation of thepiezoelectric element 160. - Further, the coupling force between the
bottom plate 142 and thepiezoelectric element 160 may be increased by thesupport protrusions piezoelectric element 160 from being separated from thebottom plate 142. - In addition, the
support protrusions piezoelectric element 160 at the time of the deformation of thepiezoelectric element 160. For example, thesupport protrusions piezoelectric element 160, thereby increasing efficiency in transferring a deformation amount to thebottom plate 142 at the time of the deformation of thepiezoelectric element 160. - The
bottom plate 142 may haveopenings 142 c formed therein in order to electrically connect thecircuit board 200 and thepiezoelectric element 160 to each other. Theopenings 142 c may be formed in thebottom plate 142 so that both end portions of a lower surface of thepiezoelectric element 160 may be exposed at the time of installing thepiezoelectric element 160. That is, at the time of installing thepiezoelectric element 160, a central portion of the lower surface of thepiezoelectric element 160 may be supported by thebottom plate 142, and both end portions of the lower surface of thepiezoelectric element 160 may be exposed to theopening 142 c. - A single or a plurality of elastic
deformation assisting holes 142 d may be formed between theopenings 142 c and end portions of thebottom plate 142 in order to decease rigidity of thebottom plate 142 so that elastic deformation of thebottom plate 142 is facilitated. That is, the number of elasticdeformation assisting holes 142 d, holes formed in order to facilitate elastic deformation of regions adjacent to both end portions of thebottom plate 142, may be provided in plural, and have various shapes. - The
bottom plate 142 may havesupport parts 142 e formed at both end portions thereof, respectively. Thesupport parts 142 may be supported by theprotrusion parts 132 of thelower case 130, respectively. - The
extension plates 144 may includesupport plate parts 146 contacting a front surface and a rear surface of themass body 180, respectively, andconnection parts 148 connecting thesupport plate parts 146 and thebottom plate 142 to each other, respectively, and/or supporting themass body 180 as shown inFIG. 6 . - The
connection parts 148 may be extended from front and rear surfaces of thebottom plate 142, respectively. In addition, theconnection part 148 may include first andsecond connection parts - The
connection part 148 may include the first andsecond connection parts support plate part 146 and thebottom plate 142 may be more firmly connected to each other. - The
support plate parts 146 may be extended in a length direction of themass body 180 and may have inner surfaces contacting the front and rear surface of themass body 180, respectively and or supporting themass body 180. For example, thesupport plate part 146 may have a length equal to or longer than that of themass body 180. Thesupport plate part 146 may have a shape approximately corresponding to that of themass body 180. - The
support plate part 146 may be provided withsupport jaws 146 a for supporting a lower surface of themass body 180. Thesupport jaws 146 a may be disposed so as to be spaced apart from each other by a predetermined distance in a length direction of thesupport plate part 146. For example, thesupport jaws 146 a may be disposed so as to be adjacent to both end portions of themass body 180, respectively. - A position of the
mass body 180 in a height direction may be controlled by thesupport jaws 146 a. For example, themass body 180 may be disposed so as to be spaced apart from thebottom plate 142 of theelastic member 140 by a predetermined distance by thesupport jaws 146 a. -
FIG. 7 is a bottom perspective view showing a piezoelectric element included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 through 7 , thepiezoelectric element 160 may be installed on one surface of theelastic member 140 so as to be disposed to face themass body 180. For example, thepiezoelectric element 160 may be fixedly installed on an upper surface of thebottom plate 142 so as to be disposed between the lower surface of themass body 180 and thebottom plate 142 of theelastic member 140. - The
piezoelectric element 160 may have, for example, but not limited to, a rectangular parallelepiped shape as shown inFIG. 7 . One end portion of the lower surface of thepiezoelectric element 160 may be provided with anelectrode 162. Theelectrode 162 may protrude from the lower surface of thepiezoelectric element 160 and have a positive (+)electrode 162 a and a negative (−)electrode 162 b. - In the case in which the
piezoelectric element 160 is installed on thebottom plate 142 of theelastic member 140, both side surfaces of thepiezoelectric element 160 may be supported by twofirst support protrusions 142 a, and the front and rear surfaces of thepiezoelectric element 160 may be supported by twosupport protrusions 142 b. - In addition, in the case in which the
piezoelectric element 160 is installed on thebottom plate 142, theelectrode 162 described above may be inserted into theopening 142 c of thebottom plate 142. - Further, in the case in which the
piezoelectric element 160 is installed on thebottom plate 142, thepiezoelectric element 160 may be disposed so as to be spaced apart from the lower surface of themass body 180 by a predetermined distance. -
FIG. 8 is a perspective view showing a mass body included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 1 through 8 , themass body 180 may vibrate together with theelastic member 140 when theelastic member 140 vibrates. Themass body 180 may have, for instance, a bar shape, and may havestep parts 182 formed on a lower surface thereof in order to prevent contact between themass body 180 and thepiezoelectric element 160. - In addition, the lower surface of the
mass body 180 on which thestep parts 182 are formed may be disposed so as to be spaced apart from thepiezoelectric element 160 by a predetermined distance. Themass body 180 may be provided with thestep parts 182 in order to prevent contact between thepiezoelectric element 160 and themass body 180 when thebottom plate 142 of theelastic member 140 is elastically deformed in response to expansion and contraction of thepiezoelectric element 160. Therefore, even at the time of elastic deformation of thebottom plate 142, thepiezoelectric element 160 and themass body 180 may not contact each other. - The
step part 182 may have a single or a plurality of steps. - The
mass body 180 may havestopper parts 184 formed at both end portions of the lower surface thereof in order to limit displacement of themass body 180 at the time of the elastic deformation of theelastic member 140. That is, thestopper parts 184 may contact the end portions of thebottom plate 142 of theelastic member 140 to limit the displacement of themass body 180. Therefore, contact between themass body 180 and thebottom plate 142 in inner regions of both end portions of thebottom plate 142 may be prevented. - For example, the
stopper parts 184 may contact the end portions of thebottom plate 142 of theelastic member 140 at the time of the elastic deformation of theelastic member 140 or at the time external impacts applied to the vibration generating apparatus, such that themass body 180 cannot descend downwardly below a predetermined level. Therefore, contact between themass body 180 and thepiezoelectric element 160 may be prevented. - Support
jaw insertion grooves 186 may be formed on themass body 180 so as to be disposed between thestopper parts 184 and thestep parts 182 of themass body 180, respectively. Themass body 180 may be installed on theelastic member 160 so that thesupport jaws 146 a of theelastic member 140 are inserted into the supportjaw insertion grooves 186, respectively. In addition, the position of themass body 180 in the height direction may be controlled by thesupport jaws 146 a. - Further, the
mass body 180 may have aninclined surface 188 formed from thestep part 182 thereof on the lower surface thereof. Theinclined surface 188 may have a gradient so as to prevent contact with thebottom plate 142 at the time of the elastic deformation of theelastic member 140. For example, theinclined surface 188 may have a gradient equal to or smaller than that of an absolute value of thebottom plate 142 in a shape in which thebottom plate 142 is maximally deformed at the time of being elastically deformed. - Although the case in which the
inclined surface 188 is inclined is shown inFIG. 8 and described by way of example in an exemplary embodiment of the present disclosure, the present disclosure is not limited thereto. For example, themass body 180 may have a curved surface formed on the lower surface thereof. The curved surface is curved from thestep part 182 of themass body 180 toward a distal end thereof. - The curved surface may have a curvature equal to or larger than that of the
elastic member 140 in the state in which theelastic member 140 is maximally deformed at the time of being deformed downwardly. - Further, the
mass body 180 may have dampermember insertion grooves 190 formed on an upper surface thereof. The dampermember insertion grooves 190 may be disposed below thedamper members 240 and have thedamper members 240 inserted thereinto when theelastic member 140 vibrates. -
FIG. 9 is a perspective view showing a circuit board included in the vibration generating apparatus according to an exemplary embodiment of the present disclosure. - Referring to
FIGS. 2 and 9 , thecircuit board 200 may be connected to thepiezoelectric element 160 and vibrate together with theelastic member 140. Thecircuit board 200 may be provided with a piezoelectricelement connection part 202. The piezoelectricelement connection part 202 may haveinsertion holes 204 into which theelectrodes 162 of thepiezoelectric element 160 are inserted. - The piezoelectric
element connection part 202 may be inserted into theopening 142 c shown inFIG. 5 formed in thebottom plate 142 of theelastic member 140. - Therefore, a solder for connecting the
piezoelectric element 160 and thecircuit board 200 to each other may be disposed in theopening 142 c of thebottom plate 142, such that an increase in a thickness due to the solder may be suppressed. - The piezoelectric
element connection part 202 may be formed to be stepped with respect to abody 206 of thecircuit board 200. The piezoelectricelement connection part 202 and thebody 206 may be connected to each other by aninclined part 205. - The
inclined part 205 may be provided with a supportprotrusion insertion hole 205 a into which thesupport protrusion 142 a shown inFIG. 5 of thebottom plate 142 is inserted. - The
body 206 may have a plurality of holes and/or grooves formed therein so as to smoothly vibrate together with thebottom plate 142. - The
circuit board 200 may be provided with an externalexposed part 208 having powersupply connection terminals 208 a formed thereon and exposed outside theupper case 122. The externalexposed part 208 may be formed to be stepped with respect to thebody 206. - A scheme of assembling the
circuit board 200 is schematically described. Thecircuit board 200 may be installed on the upper surface of thebottom plate 142 of the elastic,member 140. For example, thebody 206 may be installed on the upper surface of thebottom plate 142, and theinclined part 205 and the piezoelectricelement connection part 202 extended from one end of thebody 206 may be inserted into theopening 142 c formed in thebottom plate 142. - Here, the
inclined part 205 and the piezoelectricelement connection part 202 may be disposed at a predetermined position by thesupport protrusion 142 a of thebottom plate 142. The piezoelectricelement connection part 202 inserted into theopening 142 c may be disposed below thepiezoelectric element 160. - The external
exposed part 208 extended from the other end of thebody 206 may be exposed outside theupper case 122 through the opening disposed below theside plate 125 of theupper case 122. - The external
exposed part 208 may be seated on theextension plate 133 of thelower case 130. - Referring to
FIGS. 1 and 2 , the bufferingmember 220 may be fixedly installed on the lower surface of theelastic member 140. For instance, the bufferingmember 220 may be installed on a lower surface of thebottom plate 142 of theelastic member 140 to thereby vibrate together with thebottom plate 142. - The buffering
member 220 may descend downwardly of thelower case 130 while passing through thelower case 130 via thepassage hole 134 formed in thelower case 130 when theelastic member 140 vibrates. - The buffering
member 220 may not be subjected to interference of vibrations by thelower case 130, such that a displacement amount of theelastic member 140 may be increased. - The
damper member 240 may be fixedly installed on a lower surface of theupper plate 126 of thecase 122 and be disposed on the dampermember insertion groove 190 of themass body 180. Thedamper member 240 may, for example, decrease noise generated due to contact between themass body 180 and theupper case 122 and prevent damage to theupper case 122 and/or themass body 180. - The
damage preventing member 260 may be installed on an upper surface of thepiezoelectric element 160 to prevent damage to thepiezoelectric element 160. For example, thedamage preventing member 260 may be formed of a tape attached to the upper surface of thepiezoelectric element 160. - The buffering
member 220, thedamper member 240, and/or thedamage preventing member 260 described above may not be included in thevibration generating apparatus 100. - For instance, since the
piezoelectric element 160 may be installed on the upper surface of thebottom plate 142 of theelastic member 140, damage to thepiezoelectric element 160 may be prevented when external impacts are applied to the vibration generating apparatus. Further, since contact between thepiezoelectric element 160 and thelower case 130 may be prevented, generation of noise may be decreased. Additionally, space utilization of a lower region in an internal space of thevibration transferring member 120 divided by theelastic member 140 may be improved. Thevibration generating apparatus 100 may be further thinned. - As the piezoelectric
element connection part 202 of thecircuit board 200 is installed into theopening 142 c formed in thebottom plate 142 of theelastic member 140, an increase in a thickness due to the solder for connecting thecircuit board 200 and thepiezoelectric element 160 to each other may be prevented. - In addition, since the buffering
member 220 may descend downwardly of thelower case 130 by passing thepassage hole 134 of thelower case 130, thinness of thevibration generating apparatus 100 may be implemented. - As described above, the
piezoelectric element 160 may be installed on the upper surface of theelastic member 140, such that thepiezoelectric element 160 and thelower case 130 may not contact each other when the external impacts are applied to the vibration generating apparatus, whereby the damage to thepiezoelectric element 160 may be prevented. - In addition, the
step part 182 for preventing contact between themass body 180 and thepiezoelectric element 160 may be formed in themass body 180, whereby the damage to thepiezoelectric element 160 may be prevented. - Further, the
inclined surface 188 having a gradient corresponding to a shape of theelastic member 140 when theelastic member 140 is maximally deformed may be formed on the lower surface of themass body 180, whereby the generation of the noise due to the contact between themass body 180 and theelastic member 140 may be prevented. - Further, the efficiency in transferring the deformation amount at the time of the deformation of the
piezoelectric element 160 may be increased by thesupport protrusions elastic member 140, and the coupling force between thepiezoelectric element 160 and theelastic member 140 may be increased by thesupport protrusions elastic member 140. - Hereinafter, a vibration generating apparatus according to another exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings. However, a detailed description of the same components as the above-mentioned components will be omitted and be replaced by the above-mentioned description.
-
FIG. 10 is a schematic cross-sectional view showing a vibration generating apparatus according to another exemplary embodiment of the present disclosure. - Referring to
FIG. 10 , avibration generating apparatus 300 according to another exemplary embodiment of the present disclosure may include avibration transferring member 120, anelastic member 140,piezoelectric elements 360, amass body 180, acircuit board 200, a bufferingmember 220, adamper member 240, and adamage preventing member 260 by way of example. - Since the
vibration transferring member 120, theelastic member 140, themass body 180, thecircuit board 200, the bufferingmember 220, thedamper member 240, and thedamage preventing member 260 are the same as or similar with those of thevibration generating apparatus 100 according to an exemplary embodiment of the present disclosure described above, a detailed description thereof is omitted. - The
piezoelectric elements 360 may be installed on both surfaces of theelastic member 140, and one of thepiezoelectric elements 360 may be disposed so as to face themass body 180. For example, thepiezoelectric elements 360 may include a firstpiezoelectric element 362 installed on one surface of theelastic member 140 and a secondpiezoelectric element 364 installed on the other surface of theelastic member 140. - As described above, the
piezoelectric elements 360 may include the first and secondpiezoelectric elements elastic member 140, whereby a vibration amount may be increased. - The buffering
member 220 may be fixedly installed on the secondpiezoelectric element 364 formed on the other surface of theelastic member 140. - The
piezoelectric element 360 may be installed on the upper surface of theelastic member 140, such that thepiezoelectric element 360 and thelower case 130 may not contact each other at the time of applying the external impact to the vibration generating apparatus, whereby the damage to thepiezoelectric element 360 may be prevented. - In addition, the
step part 182 for preventing the contact between themass body 180 and thepiezoelectric element 360 is formed on themass body 180, whereby the damage to thepiezoelectric element 360 may be prevented. - Further, the
inclined surface 188 having the gradient corresponding to a shape of theelastic member 140 when theelastic member 140 is maximally deformed is formed on the lower surface of themass body 180, whereby the generation of the noise due to the contact between themass body 180 and theelastic member 140 may be prevented. - While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations could be made without departing from the spirit and scope of the present disclosure as defined by the appended claims. Accordingly, the illustrative discussions above are not intended to be exhaustive or to limit the invention to the precise forms disclosed.
Claims (14)
1. A vibration generating apparatus comprising:
a mass body;
an elastic member coupled to the mass body; and
a piezoelectric element disposed on one surface of the elastic member facing the mass body,
wherein a surface of the mass body facing the piezoelectric element has a shape that prevents contact between the piezoelectric element and the mass body.
2. The vibration generating apparatus of claim 1 , wherein the surface of the mass body has one or more stepped parts formed to correspond to the piezoelectric element.
3. The vibration generating apparatus of claim 2 , the surface of the mass body comprising an inclined surface from the stepped part toward a distal end of the mass body.
4. The vibration generating apparatus of claim 1 ,
wherein the elastic member comprises:
a bottom plate; and
support plate parts extending vertically from the bottom plate and supporting the mass body, and
wherein the piezoelectric element is installed on a surface of the bottom plate facing the mass body.
5. The vibration generating apparatus of claim 1 , further comprising a case transferring vibrations to outside the vibration generating apparatus and coupled with the elastic member. 6, The vibration generating apparatus of claim 5 , further comprising one or more damper members attached on an inner surface of the case.
7. The vibration generating apparatus of claim 1 , further comprising one or more damage preventing members disposed on a surface of the piezoelectric element facing the mass body.
8. The vibration generating apparatus of claim 5 , further comprising one or more buffering members attached on another surface of the elastic member.
9. The vibration generating apparatus of claim 8 , wherein the case has at least one opening through which the buffering members are moveable.
10. The vibration generating apparatus of claim 5 , wherein an inner surface of the case comprises one or more protrusions supporting end portions of the elastic member.
11. The vibration generating apparatus of claim 1 , further comprising a circuit board connected to the piezoelectric element and disposed on the one surface of the elastic member.
12. The vibration generating apparatus of claim 11 , wherein:
the electric member comprises one or more openings exposing an electrode formed on a surface of the piezoelectric element, and
the circuit board comprises an insertion hole, into which the electrode is inserted, and a piezoelectric element connection part inserted into the openings.
13. The vibration generating apparatus of claim 11 , wherein the circuit board comprises an external part extended to outside of the case and having a power supply connection terminal.
14. The vibration generating apparatus of claim 1 , wherein the elastic member has one or more holes.
15. The vibration generating apparatus of claim 2 , wherein the surface of the mass body comprises a curved surface between the stepped part and a distal end of the mass body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/131,242 US20160233411A1 (en) | 2013-03-20 | 2016-04-18 | Vibration generating apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361803602P | 2013-03-20 | 2013-03-20 | |
KR1020130137516A KR101580720B1 (en) | 2013-03-20 | 2013-11-13 | Vibrator |
US14/199,937 US9475094B2 (en) | 2013-03-20 | 2014-03-06 | Vibration generating apparatus |
US15/131,242 US20160233411A1 (en) | 2013-03-20 | 2016-04-18 | Vibration generating apparatus |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/199,937 Division US9475094B2 (en) | 2013-03-20 | 2014-03-06 | Vibration generating apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20160233411A1 true US20160233411A1 (en) | 2016-08-11 |
Family
ID=51544869
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/199,937 Active 2034-12-02 US9475094B2 (en) | 2013-03-20 | 2014-03-06 | Vibration generating apparatus |
US15/131,242 Abandoned US20160233411A1 (en) | 2013-03-20 | 2016-04-18 | Vibration generating apparatus |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/199,937 Active 2034-12-02 US9475094B2 (en) | 2013-03-20 | 2014-03-06 | Vibration generating apparatus |
Country Status (3)
Country | Link |
---|---|
US (2) | US9475094B2 (en) |
JP (1) | JP5843371B2 (en) |
CN (1) | CN104056769B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160352244A1 (en) * | 2015-05-28 | 2016-12-01 | Delta Electronics,Inc. | Power circuit module |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9590166B2 (en) * | 2011-10-06 | 2017-03-07 | Hysonic. Co., Ltd. | Vibrator equipped with piezoelectric element |
KR20150089474A (en) * | 2014-01-28 | 2015-08-05 | 삼성전기주식회사 | Vibrator and electronic device including the same |
KR102138335B1 (en) * | 2014-01-28 | 2020-07-27 | 주식회사 엠플러스 | Viarator |
KR101662126B1 (en) | 2014-05-02 | 2016-10-05 | 주식회사 엠플러스 | Vibrator |
KR101640446B1 (en) * | 2014-10-10 | 2016-07-18 | 주식회사 엠플러스 | Piezoelectric vibration actuator |
WO2018045504A1 (en) * | 2016-09-07 | 2018-03-15 | 深圳市柔宇科技有限公司 | Mobile terminal |
TWM547213U (en) * | 2017-05-19 | 2017-08-11 | Topray Mems Inc | Linear vibration actuator having plate-spring type suspension system |
CN109283683B (en) * | 2018-10-15 | 2023-01-03 | 成都理想境界科技有限公司 | Optical fiber scanner with large vibration amplitude |
JP2023520096A (en) * | 2019-12-11 | 2023-05-16 | ロフェルト・ゲーエムベーハー | Linear vibration actuator with moving coil and moving magnet |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120212100A1 (en) * | 2009-10-27 | 2012-08-23 | Han Sang Lee | Piezoelectric vibration device having structure including self-amplification function of vibration and electric/electronic device using same as vibrating means |
US20120299448A1 (en) * | 2011-05-23 | 2012-11-29 | American Audio Components Inc. | Apparatus for providing haptic feedback |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09327654A (en) * | 1996-06-10 | 1997-12-22 | Sumitomo Metal Ind Ltd | Vibrator |
JP2000140759A (en) * | 1998-11-09 | 2000-05-23 | Matsushita Electric Ind Co Ltd | Piezoelectric actuator and piezoelectric vibrator |
JP2005045691A (en) | 2003-07-24 | 2005-02-17 | Taiyo Yuden Co Ltd | Piezoelectric vibrator |
KR100710362B1 (en) | 2005-08-12 | 2007-04-23 | 엘지전자 주식회사 | Mobile communication terminal having touch screen |
KR20080042560A (en) | 2006-11-10 | 2008-05-15 | 정재호 | Touch panel using wave |
JP5065494B2 (en) * | 2008-08-27 | 2012-10-31 | セイコーインスツル株式会社 | Piezoelectric vibrator, oscillator, electronic device, radio timepiece, and method of manufacturing piezoelectric vibrator |
JP2011091719A (en) * | 2009-10-26 | 2011-05-06 | Authentic Ltd | Flexural oscillating actuator |
JP2011245437A (en) * | 2010-05-28 | 2011-12-08 | Nec Tokin Corp | Vibration device |
KR101157868B1 (en) | 2012-04-10 | 2012-06-22 | 주식회사 블루콤 | Piezo vibration motor |
-
2014
- 2014-03-04 JP JP2014041784A patent/JP5843371B2/en not_active Expired - Fee Related
- 2014-03-06 US US14/199,937 patent/US9475094B2/en active Active
- 2014-03-19 CN CN201410103461.1A patent/CN104056769B/en not_active Expired - Fee Related
-
2016
- 2016-04-18 US US15/131,242 patent/US20160233411A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120212100A1 (en) * | 2009-10-27 | 2012-08-23 | Han Sang Lee | Piezoelectric vibration device having structure including self-amplification function of vibration and electric/electronic device using same as vibrating means |
US20120299448A1 (en) * | 2011-05-23 | 2012-11-29 | American Audio Components Inc. | Apparatus for providing haptic feedback |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160352244A1 (en) * | 2015-05-28 | 2016-12-01 | Delta Electronics,Inc. | Power circuit module |
US10104813B2 (en) * | 2015-05-28 | 2018-10-16 | Delta Electronics, Inc. | Power circuit module |
Also Published As
Publication number | Publication date |
---|---|
JP5843371B2 (en) | 2016-01-13 |
US20140285064A1 (en) | 2014-09-25 |
JP2014180663A (en) | 2014-09-29 |
CN104056769A (en) | 2014-09-24 |
CN104056769B (en) | 2016-09-28 |
US9475094B2 (en) | 2016-10-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9475094B2 (en) | Vibration generating apparatus | |
US9431926B2 (en) | Vibration generating apparatus and electronic apparatus including the same | |
US20140346928A1 (en) | Vibration generating apparatus | |
US9636708B2 (en) | Piezoelectric element and electronic component including the same | |
US9722168B2 (en) | Vibration generating apparatus | |
US9472746B2 (en) | Vibrator | |
US9660173B2 (en) | Vibration generating apparatus | |
US9660172B2 (en) | Vibrator | |
US9515248B2 (en) | Vibration generating apparatus | |
US9455648B2 (en) | Vibration generating apparatus | |
KR101580720B1 (en) | Vibrator | |
US20150214464A1 (en) | Vibration generating device | |
US9420073B2 (en) | Vibrator | |
US9496479B2 (en) | Vibrator | |
US9484521B2 (en) | Vibration generating apparatus | |
US9827594B2 (en) | Vibration generating device | |
KR102030600B1 (en) | vibrator | |
US20160105131A1 (en) | Vibration generating device | |
US20150251220A1 (en) | Vibration generating apparatus | |
US20160074906A1 (en) | Vibration generating device | |
KR102003369B1 (en) | vibrator | |
KR20150053644A (en) | vibrator | |
KR20150059018A (en) | vibrator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MPLUS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAMSUNG ELECTRO-MECHANICS CO., LTD.;REEL/FRAME:038319/0153 Effective date: 20160212 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |