JP3215078U - Piezoelectric vibration device providing real-time vibration feedback - Google Patents

Abstract

A piezoelectric element vibration device that provides ultra-thin real-time vibration feedback that is easy to install while freely arranging an installation space. A piezoelectric element vibration device is configured to generate a vibration by applying a driving voltage to a piezoelectric vibrator 2 in which a piezoelectric element layer 6 is disposed on an electrode substrate 4 made of a conductive material. The piezoelectric element vibrating device is formed by forming the insulating member 10 for preventing the applied drive voltage from leaking and configuring the piezoelectric element vibrating device having various forms for attaching the piezoelectric vibrating body 2. Since it can be easily installed, the assembly process can be simplified, and the thickness of the piezoelectric vibration device is reduced, so it can be installed anywhere, minimizing the thickness. However, the amount of vibration can be increased, the vibration noise can be reduced, and the piezoelectric vibrator 2 can be prevented from being damaged by a drop impact. [Selection] Figure 1

Description

  The present invention relates to a vibration device, and more particularly, to a piezoelectric element vibration device that provides real-time vibration feedback that generates vibration by a piezoelectric effect.

  In recent years, with the development of virtual reality implementation technology, users have come to seek more specific and realistic information through virtual reality. One of the technologies that have been developed to meet the demand is haptic technology that transmits a tactile sensation to a user by vibration. The mere haptic technology can include an alarm function using a vibration motor that is widely used in mobile phones at present, and is widely applied to various fields such as medical simulators and game machines.

  In particular, in the future, in addition to monitors and speakers, haptic devices are expected to be basically installed as output devices for computing devices. This is because by installing a haptic device in a portable electronic device, there is an advantage that the tactile sensation recognition rate of the user is high, and an advantage that the linkage with the IT device is excellent.

  A vibration motor of a mobile terminal, which is a specific example in which haptic technology is applied to a portable electronic device such as a smartphone, adds vibration to sound and video output from an existing mobile terminal to make it feel three-dimensional.

  In conventional haptic technology, a waveform is designed to generate a required effect, and after being created as a digital waveform (mainly PWM, sine wave), it is stored in a storage device and stored as needed. Since the waveform was called up and used, the real feeling could not be transmitted.

  As an example of a vibration motor installed in a mobile terminal, Japanese Patent No. 10-793682, “ultra-small linear vibration motor” registered by the present applicant is disclosed.

  However, when the vibration device is installed in a mobile terminal having a small installation space, the mobile terminal vibration motor has difficulty in arranging parts in determining the vibration generation position. Further, in the case of a linear motor, it is stored in advance. The execution circuit is complicated because the generated waveform must be called and driven at a frequency.

  In addition, since the response speed of the vibration motor is slow by using the attractive force and repulsive force of the coil and magnet, it is not possible to ensure the simultaneity and the size is reduced, so that the amount of vibration is small. There was a problem of being.

  Accordingly, an object of the present invention is to provide a piezoelectric element vibration device that provides an ultra-thin real-time vibration feedback that is easy to install while freely arranging an installation space in installing the piezoelectric element vibration device. .

  Another object of the present invention is to provide a piezoelectric element vibration device capable of reducing noise due to vibration and preventing damage due to a drop impact while increasing the vibration amount of the piezoelectric element vibration device.

  In order to achieve the above object, the present invention provides a piezoelectric element that generates vibration by applying a driving voltage to piezoelectric vibrators 2, 2a, 2b in which a piezoelectric element layer 6 is disposed on an electrode substrate 4 made of a conductive material. An insulating member 10 for preventing the applied drive voltage from leaking is formed in the piezoelectric element layer 6 constituting the vibration device, and below the piezoelectric vibrating bodies 2, 2 a, 2 b, the electrode substrate 4 It is characterized by comprising leg portions 8 that are extended from and attached to the piezoelectric vibrators 2, 2a, 2b.

  Further, the present invention constitutes a piezoelectric element vibration device that generates a vibration by applying a driving voltage to the piezoelectric vibrators 2, 2a, 2b in which the piezoelectric element layer 6 is disposed on the electrode substrate 4 made of a conductive material, The piezoelectric element layer 6 is formed with an insulating member 10 for preventing an applied drive voltage from leaking, and an insulating process for attaching the piezoelectric vibrators 2, 2 a, 2 b to the lower portion of the electrode substrate 4. It is characterized by comprising a fixed housing 18.

  Further, the present invention constitutes a piezoelectric element vibration device that generates a vibration by applying a driving voltage to the piezoelectric vibrators 2, 2a, 2b in which the piezoelectric element layer 6 is disposed on the electrode substrate 4 made of a conductive material, The piezoelectric element layer 6 is formed with an insulating member 10 for preventing the applied drive voltage from leaking, and the piezoelectric vibrators 2, 2a, 2b are provided at both ends of the piezoelectric vibrators 2, 2a, 2b. It is characterized in that the bracket 22 for mounting is fitted and installed.

  Further, the present invention constitutes a piezoelectric element vibration device that generates a vibration by applying a driving voltage to the piezoelectric vibrators 2, 2a, 2b in which the piezoelectric element layer 6 is disposed on the electrode substrate 4 made of a conductive material, The piezoelectric element layer 6 is formed with an insulating member 10 for preventing the applied drive voltage from leaking, and the lower part of the electrode substrate 4 is for increasing the vibration efficiency of the piezoelectric vibrating bodies 2, 2 a, 2 b. The elastic member 32 is installed, and the lower part of the elastic member 32 is provided with a lower plate 36 for attaching the piezoelectric vibrating bodies 2, 2 a and 2 b.

  Further, the present invention constitutes a piezoelectric element vibration device that generates a vibration by applying a driving voltage to the piezoelectric vibrators 2, 2a, 2b in which the piezoelectric element layer 6 is disposed on the electrode substrate 4 made of a conductive material, The piezoelectric element layer 6 is formed with an insulating member 10 for preventing the applied drive voltage from leaking, and is formed so as to surround the entire piezoelectric vibrators 2, 2 a, 2 b, thereby increasing the vibration amount, It is characterized in that a soft case 38 is configured for reducing vibration noise and attaching the piezoelectric vibrators 2, 2a, 2b.

  In the present invention, since the piezoelectric element vibration device can be easily installed in the mobile terminal, the installation process can be simplified, and the thickness of the piezoelectric element vibration device is reduced. It can be installed at any position in the terminal, and there is an effect that a haptic signal with a fast vibration response can be provided to the user.

  In addition, the piezoelectric element vibration device of the present invention has the effect of increasing the amount of vibration and reducing the vibration noise while minimizing the size, and preventing the piezoelectric vibrating body from being damaged by a drop impact. is there.

1 is a perspective configuration diagram of a piezoelectric element vibration device providing real-time vibration feedback according to a preferred embodiment of the present invention.

It is installation sectional drawing of the unimorph type piezoelectric element vibration apparatus which concerns on the Example of this invention.

FIG. 3 is a use state diagram of FIG. 2.

It is a block diagram of the bimorph type piezoelectric element vibration apparatus which is another Example of this invention.

It is a block diagram of the multimorph type piezoelectric element vibration apparatus which is further another Example of this invention.

It is a block diagram of the multimorph type piezoelectric element vibration apparatus which is further another Example of this invention.

It is a block diagram of the multimorph type piezoelectric element vibration apparatus which is further another Example of this invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

It is the installation block diagram of the piezoelectric vibrating body which concerns on various Examples of these.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

FIG. 3 is an installation configuration diagram of a piezoelectric vibrator according to various embodiments of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The piezoelectric element vibration device that provides real-time vibration feedback according to the present invention is a vibration unit that generates vibrations using a reverse piezoelectric effect (Reverse Piezoelectric effect).

  In the piezoelectric effect, a voltage is generated at the moment when a force is applied to the piezoelectric material to expand and contract. On the contrary, the property of expanding and contracting when a voltage is applied to the piezoelectric material is called an inverse piezoelectric effect. Examples of the piezoelectric effect include an ignition piezoelectric element (electric lighter, ignition gas range), a pressure sensor, an acceleration sensor, and the like. Examples of the inverse piezoelectric effect include an actuator and a piezoelectric motor.

  To be precise, the vibration device of the present invention embodies vibration means using the inverse piezoelectric effect, and forms a piezoelectric element layer with a piezoelectric material, and generates vibration with the property of expanding and contracting by applying a voltage. become. Typical examples of such piezoelectric materials include PZT (Pb (Ti, Zr) O3), which is a composite ceramic, and barium titanate (BaTiO3), which is a ferroelectric material, which are used to form a piezoelectric ceramic. .

  The vibration device using the piezoelectric effect is roughly classified into a unimorph type, a bimorph type, a multimorph type, and the like according to the form, and the bimorph type is a serial type according to the polarization direction. It is divided into a parallel type.

  In this invention, the structure for installing the piezoelectric vibrating body of various forms, such as a unimorph type, a bimorph type, and a multimorph type, in the casing in a mobile terminal is disclosed.

  The mobile terminal may be a portable terminal (for example, a smartphone) having a call function, a medical device, a tablet PC, a game device, a vibrating mouse, a vibrating remote controller, a vibrating keypad, a protective case for a portable terminal, etc. Electronic equipment for providing vibration feedback can be included.

  FIG. 1 shows a configuration of a unimorph type piezoelectric element vibration device according to an embodiment of the present invention. Referring to this, in the present invention, an electrode substrate (Substrate) 4 made of a material having good electrical conductivity is placed, and a piezoelectric element layer 6 is placed on the upper surface to form the piezoelectric vibrating body 2.

  The (+,-) voltage is alternately applied to the upper electrode and the lower electrode of the piezoelectric element layer 6 of the piezoelectric vibrator 2 according to the embodiment of the present invention so that the piezoelectric vibrator 2 is bent due to expansion and contraction. Thus, vibration is generated according to the frequency of the applied drive voltage. By alternately applying (+, −) voltages to the upper and lower surfaces of the piezoelectric element layer 6, a voltage is also applied to the electrode substrate 4 bonded to the lower surface of the piezoelectric element layer 6.

  In the present invention, in order to reduce the overall thickness of the piezoelectric vibrator 2, a voltage is applied to the electrode substrate 4 and the upper electrode of the piezoelectric element layer 6 in the form of FPCB (Flexible PCB). If necessary, it is also possible to apply a voltage using an electric wire.

  FIG. 2 is an installation cross-sectional view of the piezoelectric vibrating body 2 according to the embodiment of the present invention, and FIG. 3 is a use state diagram in which the piezoelectric vibrating body 2 is installed in a mobile terminal. An insulating member 10 is attached to prevent the drive voltage applied to the terminal from leaking into the mobile terminal. The insulating member 10 may be attached with an insulating film, or may be formed with an insulating film using epoxy, urethane, or the like.

  In addition, a poron tape may be further provided on the upper portion of the piezoelectric element layer 6 provided with the insulating member 10 in order to absorb noise generated from the piezoelectric vibrating body 2 together with insulation.

  Poron tape is a low-density urethane foam tape with a high-density cell structure, and has a noise absorbing effect in addition to an insulating effect. Therefore, the vibration noise of the piezoelectric vibrator 2 can be reduced, and external impact can be absorbed to be piezoelectric. It has a function of preventing the vibration body 2 from being damaged.

  The electrode substrate 4 of the present invention can use materials such as brass, stainless steel, Ni alloy (Ni-alloy), aluminum, etc., and a voltage is applied to the lower surface of the electrode substrate 4. Thus, a number of weight pieces 12 for increasing the vibration generated are attached at predetermined positions. Although the vibration is generated uniquely by the vertical bending displacement of the piezoelectric vibrating body 2, the vibration amount transmitted to the mobile terminal is very weak, so by attaching a weight piece 12 having a constant weight to the piezoelectric element layer 6, The generated vibration can be increased.

  In the present invention, in order to attach the piezoelectric vibrating body 2 to the casing 16 inside the mobile terminal, the electrode substrate 4 is provided with a leg portion 8 formed by extending and bending the electrode substrate 4. As shown in FIG. 2, the leg portion 8 is formed in the outer direction of the piezoelectric vibrating body 2, and when installed in a narrow space like the inside of the mobile terminal, as shown in FIG. It is possible to extend the inside of the body 2 to reduce the installation space. The piezoelectric vibrator 2 is fixed by adhering the leg portion 8 to the casing 16 in the mobile terminal using an adhesive or a double-sided tape, or by adhering the leg portion 8 by welding.

  Since (+, −) voltage is alternately applied to the electrode substrate 4, extended leg portions are used to prevent the current applied to the electrode substrate 4 from leaking to the casing 16 in the mobile terminal. 8 is preferably insulated by coating a synthetic resin material such as silicon, urethane, epoxy, polyester, and acrylic to form an insulating film.

  In addition, a coating layer is formed on the surface of the piezoelectric element layer 6 with a soft synthetic resin or synthetic rubber, so that noise noise generated during vibration can be reduced and an insulating effect can be achieved. Examples of the coating layer include soft epoxy, soft urethane, and silicon.

  In the above description, a unimorph type piezoelectric element vibration device according to an embodiment of the present invention is disclosed. However, as shown in FIG. 4, a bimorph in which piezoelectric element layers 6 are arranged on both sides with an electrode substrate 4 interposed therebetween. Type piezoelectric element vibration device and, as shown in FIG. 5, piezoelectric vibrators 2a and 2b are formed as a multimorph type piezoelectric element vibration device in which a large number of piezoelectric element layers 6 are stacked on the upper stage of the electrode substrate 4, and the inside of the mobile terminal It is also possible to install in.

  6a and 6b show another embodiment for installing the piezoelectric vibrating body 2b. When the piezoelectric vibrating body 2b is formed as a multimorph type piezoelectric element vibrating device, the piezoelectric vibrating body is formed on the casing 16 in the mobile terminal. Brackets 22 for attaching 2b can be formed at both ends of the piezoelectric vibrating body 2b.

  The brackets 22 are fitted to both ends of the electrode substrate 4, and the piezoelectric vibrators 2 b are fixed by directly attaching the brackets 22 at both ends to the inner surface of the casing 16.

  At this time, as shown in FIG. 6b, the protective tape 24 may be attached to the outer surface of the piezoelectric vibrating body 2b. The protective tape 24 may be attached so as to cover one or both sides of the piezoelectric vibrating body 2b, prevent damage to the piezoelectric element layer 6 due to vibration of the piezoelectric vibrating body 2b, dropping or impact of the mobile terminal, and the weight. The piece 12 can be prevented from falling off and have an insulating effect.

  After the protective tape 24 is applied, the bracket 22 can be installed inside the mobile terminal after the bracket 22 is fitted and installed at both ends of the piezoelectric vibrating body 2b.

  The protective tape 24 can be attached even when the piezoelectric element layer 6 is formed in a unimorph type or a bimorph type, and is preferably attached in a form that wraps the entire piezoelectric vibrators 2, 2 a, 2 b.

  As shown in FIGS. 6a and 6b, when the piezoelectric element layer 6 is formed in a multimorph type, the size of the piezoelectric vibrating body 2b can be reduced and the thickness thereof can be reduced. When it adheres to a narrow place, the space restriction due to the installation position is reduced, and it becomes possible to adhere to various positions.

  In the above description, the bracket 22 is formed to attach the multimorph type piezoelectric vibrating body 2b. However, in the case of the unimorph type and bimorph type piezoelectric vibrating bodies 2 and 2a, the bracket 22 is fitted to both ends and the piezoelectric vibration is formed. It is also possible to fix by attaching the bodies 2 and 2a.

  7 and 8 show a configuration in which the form of the electrode substrate 4 according to the present invention is variously modified to install the piezoelectric vibrating body 2 in the casing 16 in the mobile terminal.

  The piezoelectric vibrating body 2 shown in FIG. 7 is formed by bending both ends of the electrode substrate 4 to the inside of the piezoelectric vibrating body 2, and the formed leg portion 8 is attached to the casing 16 to attach the piezoelectric vibrating body 2. To fix. When the piezoelectric vibrator 2 is attached to the casing 16 in the mobile terminal by forming the leg portion 8 so as to be bent inside the piezoelectric vibrator 2, the installation space occupies a small amount. Can do.

  FIG. 8 shows an installation configuration of the piezoelectric vibrator 2 according to another embodiment of the present invention. The electrode substrate 4 is formed in a box shape, and the piezoelectric vibrator 2 is attached to the casing 16 in the mobile terminal. By connecting the leg portions 8 at both ends extended from the electrode substrate 4 and attaching the entire lower part of the piezoelectric vibrating body 2 to the casing 16, the area attached to the casing 16 by the leg portions 8 increases. The piezoelectric vibrating body 2 can be adhered and fixed more firmly.

  9 and 10 show a modified embodiment of the present invention. In general, the piezoelectric vibrator 2 installed in an electronic device such as a mobile terminal is very small. The electrode substrate 4 is small and is formed in a thin film type having a thickness of about 0.1 to 0.3T. The electrode substrate 4 is formed in a thin thin film shape, and may be crumpled or deformed during handling. The thin electrode substrate 4 is extended to bend and a bent leg portion 8 is attached and piezoelectric vibration is applied. When the body 2 is installed on the casing 16, the leg portion cannot receive force, and the function for fixing the piezoelectric vibrating body 2 cannot be performed correctly.

  In the present invention, the support member 14 for firmly supporting the leg portions 8 formed at both ends of the electrode substrate 4 is provided. The support member 14 is formed by bending both side surfaces of the leg portion 8 into a “┗┛” shape. By providing the support member 14 on the leg portion 8, the support member 14 adheres to the casing 16 in the mobile terminal and generates vibration. In this case, both ends of the piezoelectric vibrating body 2 are firmly fixed, and the thin film electrode substrate 4 is not easily crumpled or deformed when the piezoelectric vibrating body 2 is handled in the assembly process.

  In the piezoelectric vibrator 2 of the present invention, the vertical bending phenomenon occurs due to the expansion and contraction phenomenon when the vibration is generated, and considering the bending range and the thickness of the weight piece 12, It is preferable to set the height of the support member 14 so as to ensure a space in which a bending motion can occur.

  In the embodiment of the present invention, the legs 8 formed by extending the electrode substrate 4 are attached to the casing 16 to install the piezoelectric vibrator 2. As shown in FIG. 11, the piezoelectric vibrator 2 is attached to the casing 16. It is also possible to provide and fix the fixing housing 18 bent in a separate process.

  The fixing housing 18 is fixed by being bonded or welded below the electrode substrate 4, and the piezoelectric vibrating body 2 is installed by attaching the bottom surface of the fixing housing 18 to the casing 16. Since the fixing housing 18 does not need to use the same material as that of the electrode substrate 4, it is preferable to use a material having high strength, and the fixing housing 18 is insulated by being manufactured in a separate process. The process is simple, and there is an effect that the process of manufacturing the piezoelectric vibrator 2 is simplified. Further, by making the fixing housing 18 using a non-conductive material, it is possible to prevent the current applied to the electrode substrate 4 from flowing into the fixing housing 18 and leaking to the casing 16.

  Even when the piezoelectric vibrating body 2 is installed in the casing 16 using the fixing housing 18, as shown in FIG. 12, the supporting member 14 can be provided on the upper portion of the fixing housing 18.

In the present invention, as shown in FIG. 13 and FIG. 14, in order to suppress the vibration sound generated from the piezoelectric vibrating body 2 attached to the casing 12, a separate soundproof case is put on the upper portion of the piezoelectric vibrating body 2. 20 is provided. The soundproof case 20 can be formed of a metal plate, plastic, or rubber material. In particular, when a plastic or rubber material is used, the effect of suppressing sound generated during vibration can be increased.

Further, as shown in FIGS. 15 a to 16, a vibration module case 26 in which the piezoelectric vibrator 2 can be fitted and installed is provided, and after the piezoelectric vibrator 2 is fitted and fixed inside, the casing 16 It is also possible to adhere and fix the vibration module case 26 to the inner surface.

  This will be described in more detail. The piezoelectric vibrator 2 is fitted from one side of the vibration module case 26 of the tubular body in which the internal space is formed so that the piezoelectric vibrator 2 is accommodated in the internal space of the vibration module case 26. become. The vibration module case 26 is preferably made of a material such as aluminum, stainless steel, an iron plate, and a separate synthetic resin molding.

  After the piezoelectric vibrating body 2 is fitted into the vibration module case 26, both ends are finished with the sealing members 28 as shown in FIG. 15a. The sealing member 28 uses silicon, UV adhesive, epoxy, or the like, and finishes both ends of the vibration module case 26 with the sealing member 28, so that sound waves generated by the vibration of the piezoelectric vibrator 2 do not leak to the outside. So that it plays a soundproofing role. Further, by fitting the piezoelectric vibrating body 2 in the vibration module case 26, it has a protection function by itself.

  Further, as shown in FIG. 15b, it is also possible to form the closing plates 30 at both ends of the vibration module case 26 to seal the piezoelectric vibrating body 2 fitted and installed inside.

  The closing plate 30 may be formed integrally with the vibration module case 26, or a separate closing plate 30 may be installed. The piezoelectric vibration member 2 is formed on the inner side with both ends of the vibration module case 26 open. In a state where the two are fitted and installed, the both open ends are closed with the closing plate 30, thereby preventing the sound waves from leaking to the outside.

  With the piezoelectric vibrating body 2 fitted in the vibration module case 26, the lower surface of the vibration module case 26 is adhered and fixed to the inner surface of the casing 16 with an adhesive. As an adhesive for fixing the vibration module case 26, a double-sided tape is preferable, and an epoxy, an acrylic adhesive, or the like can also be used.

  By adhering and fixing the entire lower surface of the vibration module case 26 in which the piezoelectric vibrating body 2 is inserted to the casing 16, the bonding area is increased and can be stably fixed. The effect of transmitting the generated vibration to the mobile terminal via the casing 16 is also enhanced. In addition, as described above, the piezoelectric vibration member 2 is provided and integrated in the vibration module case 26, so that the work time can be shortened during the work process of attaching the vibration device to the mobile terminal.

  15 and 16, the piezoelectric vibrator 2 provided with the legs 8 for attaching the piezoelectric vibrator 2 is described as being fitted and installed in the vibration module case 26, but FIGS. 6 a and 6 b This is also possible when the bracket 22 is fitted to both ends and attached to the casing 16 as shown in FIG.

  17 and 18 show the fixing structure of the piezoelectric vibrator 2 according to various embodiments of the present invention.

  As shown in FIGS. 11 and 12 of the present invention, when the fixing housing 18 for fixing the piezoelectric vibrating body 2 is provided, both ends of the piezoelectric vibrating body 2 are completely fixed to the fixing housing 18. As a result, there is a case where the width of vibration is limited.

  Therefore, when the fixing method of the piezoelectric vibrating body 2 is formed with the fitting structure as shown in FIGS. 17 to 19, the both ends of the piezoelectric vibrating body 2 are not completely fixed, but the free ends are formed. In addition, since the vibration width due to the vertical bending displacement of the piezoelectric vibrating body 2 is not limited, variable vibration control can be performed and a larger vibration can be obtained.

  When both ends of the piezoelectric vibrator 2 are fixed by the fitting structure as described above, the fitted piezoelectric vibrator 2 is formed by bending a blade piece formed at the end portion of the fitted fixing housing 18. A post process is required to prevent separation.

  20 and 21 show still another embodiment of the piezoelectric vibrator 2b of the present invention.

  In the present invention, the elastic member 32 is provided at both ends of the electrode substrate 4 in order to increase the vibration efficiency of the piezoelectric vibrating body 2b. The elastic member 32 uses synthetic resin such as silicon or urethane, synthetic rubber, natural rubber, or the like, and may be any material that has soft elasticity.

  The elastic member 32 may be formed on both ends of the electrode substrate 4 by bonding, bonding, or injection. The elastic member 32 is formed thicker than the thickness of the weight piece 12 below the electrode substrate 4 so that the piezoelectric vibrator 2b is bent upward and downward. It is preferable to enable this.

  When the soft elastic member 32 is formed at both ends of the electrode substrate 4, the vibration efficiency becomes high when the weight piece 12 vibrates due to the bending of the piezoelectric element layer 6 and the electrode substrate 4, and the electrode substrate 4 can be freely expanded and contracted. Since there is no restriction on the resonance frequency, variable vibration control of various frequencies is possible. Further, there is an effect that vibration noise due to bending displacement of the piezoelectric element layer 6 and the electrode substrate 4 is reduced.

  A lower plate 36 for installing the piezoelectric vibrating body 2b on the casing 16 is further provided below the electrode substrate 4 on which the elastic member 32 is installed, and the lower plate 36 is adhered to the casing 16 to attach the piezoelectric vibrating body 2b. Fix it.

  Further, as shown in FIG. 21, the piezoelectric vibration member 2b attached to the casing 16 has an upper portion of the piezoelectric vibration member 2b in order to protect the piezoelectric vibration member 2b from being damaged by a drop impact and to reduce noise caused by vibration. It is also possible to cover the entire top of the body 2b with a lid 34 so as to surround the whole.

  The lid 34 can be formed of a metal plate, plastic or rubber material, and in particular, when plastic or rubber material is used, the effect of suppressing sound generated during vibration can be increased.

  22 to 24 show other forms of the electrode substrate 4 constituting the piezoelectric vibrating body 2b.

  In the present invention, the width of the electrode substrate 4 is increased so that the vibration force of the piezoelectric vibration member 2b is increased or the vibration force is the same at the same size, but the size of the piezoelectric vibration member 2b can be reduced. Form narrow.

  Referring to FIGS. 22 to 24, in the embodiment of the present invention, the piezoelectric vibrator layer 2b is formed of a multimorph type having a large vibration force, whereby the size of the piezoelectric element layer 6 is reduced, and the piezoelectric element layer is formed. It is possible to narrow the left and right widths of the electrode substrate 4 to which 6 is not attached.

  When the piezoelectric vibrating body 2b is attached to an electronic device having a narrow internal space such as a mobile terminal, as shown in FIG. 22, by minimizing both edge portions of the electrode substrate 4 to which the piezoelectric element layer 6 is not attached. Since the volume of the piezoelectric vibrating body 2b is reduced and a marginal space is generated in the electronic device, the installation of other components can be facilitated.

  Further, in order to utilize the marginal space generated by narrowing the widths at both ends of the electrode substrate 4, a weight piece 12 having a shape as shown in FIG. 23 is attached to the electrode substrate 4 and shown in FIG. The piezoelectric vibrating body 2b having such a shape can be formed, and the vibration effect can be enhanced by increasing the weight of the weight piece 12.

  That is, even if the vibration amount of the piezoelectric element layer 6 is the same, the weight piece 12 attached to the electrode substrate 4 is heavier and the vibration efficiency is increased. This is the size of the piezoelectric vibration member 2b. Even if the height is reduced, the vibration effect can be enhanced.

  25 and 26 show the configuration of a piezoelectric element vibration device according to another embodiment of the present invention.

  The piezoelectric vibrating body 2b of the present invention can include a case 38 that can adhere and fix the piezoelectric vibrating body 2b to the inside of the mobile terminal while increasing the amount of vibration and reducing noise due to vibration.

  The case 38 can be formed of a soft material such as natural rubber or synthetic rubber. In particular, silicon, neoprene, EPDM, fluorine rubber, acrylic rubber, or the like can be used among the synthetic rubber. In addition, any material can be used as long as it has elasticity such as a soft synthetic resin.

  The case 38 of the present invention also functions as the bracket 22 for attaching and fixing the piezoelectric vibrator 2b described above, the elastic member 32 for increasing the vibration efficiency, and the lid 34 for reducing vibration noise. By forming the piezoelectric vibrator 2b so as to surround the piezoelectric vibrator 2b, the process can be simplified.

  The configuration of the case 38 will be described. The upper coupling portion 40 and the lower coupling portion 42 coupled so as to surround the piezoelectric vibrating body 2 b are provided, and the electrode substrate 4 is fitted to both ends of the lower coupling portion 42. A portion 44 is formed.

  The upper and lower coupling portions 40 and 42 are coupled so as to surround the entire piezoelectric vibrating body 2b with a soft rubber material, whereby both ends of the piezoelectric vibrating body 2b are fixed by coupling of the case 38.

  When both ends of the piezoelectric vibrating body 2b are fixed by the soft case 38, vibration efficiency is increased by amplification by elasticity at the time of vibration, the electrode substrate 4 is freely expanded and contracted, and there is no restriction on the resonance frequency. Control becomes possible.

  Further, there is an effect that vibration noise due to bending displacement of the piezoelectric element layer 6 and the electrode substrate 4 is reduced.

  Further, by forming and sealing the entire piezoelectric vibrating body 2b on a soft rubber material so as to be surrounded by the lower coupling portions 40 and 42, the vibrational sound of the piezoelectric vibrating body 2b is not transmitted to the soft case 38. Since the noise of the piezoelectric vibrating body 2b is reduced and the piezoelectric vibrating body 2b is protected by the case 38 made of rubber material, the soft case 38 plays a role of absorbing the shock applied to the piezoelectric vibrating body 2b at the time of dropping impact, Damage to the vibrating body 2b can be prevented.

  In the embodiments of the present invention, the shape of the piezoelectric element layer 6 is not limited to a specific shape as shown in the figure. In various embodiments, the piezoelectric element layer 6 is formed into a unimorph type, bimorph type, or multimorph type. It is possible to form the vibrators 2, 2a, 2b. In addition to the bender type piezoelectric vibrators 2, 2 a, 2 b shown as the embodiment of the present invention, the disk type piezoelectric vibrators 2, 2 a, 2 b may be used.

  In the following, an embodiment in which the piezoelectric vibrators 2, 2a, 2b of the present invention can be installed in various electronic devices to transmit a vibration response will be described. In addition to the embodiments described later, the vibration response is transmitted to the user. It can be applied to various electronic devices.

  The piezoelectric vibrators 2, 2a, 2b of the present invention can be installed in a mobile terminal to transmit a quick vibration response to a user, and the installation space is reduced by being extremely thin compared to a conventional vibration motor. It is effective for installation in narrow mobile terminals.

  In addition, since the response speed is fast, it is possible to feel a sense of coincidence between the sound and the video, and it is possible to control the magnitude and speed of the vibration within a wide bandwidth range. Can be given.

  The piezoelectric vibrators 2, 2 a, 2 b of the present invention are installed inside the vibrating mouse, and a fast vibration response corresponding to the displayed visual information is transmitted to the user's hand, so that the simultaneous feeling by the user's mouse operation and A real feeling can be given.

  When the piezoelectric vibrators 2, 2a, 2b of the present invention are installed on the vibrating mouse, various vibrations suitable for visual information can be transmitted to the hand, and an operational feeling is transmitted to the user as a vibration response when the mouse is clicked. Can do.

  The piezoelectric vibrators 2, 2a, 2b of the present invention can be installed on a smart input device that works with a smart TV, for example, a keypad or a remote controller, so that the operation feeling can be transmitted to the fingertip when operating the buttons of the smart input device. Accurate signal input of a smart input device with reduced thickness can be achieved.

  In addition, screen information output via the smart TV can be transmitted to the user as vibration feedback, and in particular, by transmitting vibration corresponding to the game image output on the screen to the user, it is fast with realism. Simultaneous feeling due to vibration response can be given.

  The piezoelectric vibrators 2, 2a, 2b of the present invention can be installed in a controller of a game machine such as Sony PSP, Nintendo, and can transmit a vibration response corresponding to a game image to a user in real time during a game operation. A feeling can be given.

  Furthermore, since the piezoelectric vibrators 2, 2a, 2b of the present invention have a faster vibration response speed and can variably vibrate over a wider bandwidth than conventional vibration motors, when installed in a game controller, real-time vibrations are possible. Simultaneous feeling due to response and real feeling due to variable vibration can be transmitted.

  The piezoelectric vibrators 2, 2a, 2b of the present invention are installed in a protective case for preventing damage to a mobile terminal such as a smartphone, and vibrations that match the video and sound output in a state where the protective case is attached to the smartphone. Can be transmitted to the user in real time.

  Even when a game is operated via a smartphone, real-time vibration feedback suitable for the game video can be transmitted, so that a sense of realism and a simultaneous feeling can be given.

  The vibration feedback control corresponding to the image and sound of the smartphone is provided with a separate control module for controlling the piezoelectric vibrators 2, 2 a, 2 b in the protective case of the mobile terminal, and vibration from the smartphone via wired / wireless The control signal is received and vibration feedback is provided.

  The protective case for the mobile terminal can incorporate a large-capacity auxiliary battery that assists the main battery of the smartphone, and supplies power necessary for discharging the main battery and vibrating the piezoelectric vibrators 2, 2a, 2b. Sometimes used.

  As described above, since the present invention can be easily installed in installing the piezoelectric element vibration device, the assembly process can be simplified, and the thickness of the piezoelectric element vibration device is reduced. It can be installed at any position.

  Further, the piezoelectric element vibration device of the present invention can increase the amount of vibration and reduce the vibration noise while minimizing the size, and can prevent the piezoelectric vibrators 2, 2a, 2b from being damaged by a drop impact. There is an effect that can.

  While the invention has been described with reference to specific embodiments, various modifications can be made without departing from the scope of the invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the scope of the utility model registration request and the equivalent of the utility model registration request.

The piezoelectric element vibration device of the present invention is installed in a mobile terminal including a smartphone, a medical device, a tablet PC, a game device, a vibration mouse, a vibration remote controller, a vibration keypad, a protective case for a mobile terminal, and the like to provide vibration feedback. Can be used for

Claims (20)

A piezoelectric element vibration device that generates vibration by applying a driving voltage to piezoelectric vibrators (2), (2a), and (2b) in which a piezoelectric element layer (6) is disposed on an electrode substrate (4) made of a conductive material. And
In the piezoelectric element layer (6), an insulating member (10) for preventing the applied drive voltage from leaking is formed,
Below the piezoelectric vibrators (2), (2a), and (2b) are provided leg portions (8) that are extended from the electrode substrate (4) to attach the piezoelectric vibrators (2), (2a), and (2b). A piezoelectric element vibration device that provides real-time vibration feedback.   The real time according to claim 1, wherein the leg (8) is configured to be bent at either the inside or the outside of the piezoelectric vibrator (2) (2a) (2b). Piezoelectric vibration device that provides vibration feedback.   The legs (8) bent inside the piezoelectric vibrators (2), (2a), and (2b) are connected to each other so that the adhesion area to be attached is increased. A piezoelectric element vibration device for providing real-time vibration feedback according to claim 2.   On both side surfaces of the leg portion (8), a support member (14) that firmly supports the fixing of the attached piezoelectric vibrators (2), (2a), and (2b) is formed into a “┗┛” shape. The piezoelectric element vibration device that provides real-time vibration feedback according to any one of claims 1 to 3.   The leg portion (8) is configured to be coated with any one of synthetic resin materials including silicon, urethane, epoxy, polyester, and acrylic so that an insulating film is formed. A piezoelectric element vibration device that provides real-time vibration feedback according to Item 1. A piezoelectric element vibration device that generates vibration by applying a driving voltage to piezoelectric vibrators (2), (2a), and (2b) in which a piezoelectric element layer (6) is disposed on an electrode substrate (4) made of a conductive material. And
The piezoelectric element layer (6) is formed with an insulating member (10) for preventing the applied drive voltage from leaking, and the piezoelectric vibrating body (2) (2a) is formed below the electrode substrate (4). A piezoelectric element vibration device for providing real-time vibration feedback, characterized in that it comprises a fixed housing (18) that is insulated to attach (2b).   The fixing housing (18) is formed with a support member (14) that firmly supports fixing of the attached piezoelectric vibrators (2), (2a), and (2b). Piezoelectric vibration device that provides real-time vibration feedback. A piezoelectric element vibration device that generates vibration by applying a driving voltage to piezoelectric vibrators (2), (2a), and (2b) in which a piezoelectric element layer (6) is disposed on an electrode substrate (4) made of a conductive material. And
In the piezoelectric element layer (6), an insulating member (10) for preventing the applied drive voltage from leaking is formed,
A bracket (22) for mounting the piezoelectric vibrators (2), (2a) and (2b) is fitted and installed at both ends of the piezoelectric vibrators (2), (2a) and (2b). Piezoelectric vibration device that provides real-time vibration feedback. A piezoelectric element vibration device that generates vibration by applying a driving voltage to piezoelectric vibrators (2), (2a), and (2b) in which a piezoelectric element layer (6) is disposed on an electrode substrate (4) made of a conductive material. And
In the piezoelectric element layer (6), an insulating member (10) for preventing the applied drive voltage from leaking is formed, and piezoelectric vibrating bodies (2) (2a) are formed at both ends of the electrode substrate (4). ) (2b) is provided with an elastic member (32) for increasing the vibration efficiency, and a lower plate for attaching the piezoelectric vibrators (2) (2a) (2b) to the lower part of the elastic member (32) ( 36) A piezoelectric element vibration device that provides real-time vibration feedback.   The piezoelectric vibrators (2), (2a) and (2b) are provided with a lid (34) for preventing the piezoelectric vibrators (2), (2a) and (2b) from being damaged by a drop impact and reducing noise caused by vibrations. 10. The piezoelectric element vibration device for providing real-time vibration feedback according to any one of claims 1, 6, 8, and 9, characterized by comprising:   The piezoelectric vibrating body (2) (2a) (2b) includes a soundproof case (20) for preventing the piezoelectric vibrating bodies (2), (2a) and (2b) from being damaged by a drop impact and reducing noise caused by vibration. The piezoelectric element vibration device for providing real-time vibration feedback according to any one of claims 1, 6, 8, and 9, characterized by comprising:   The piezoelectric vibrating bodies (2), (2a), and (2b) include vibration module cases (26) for preventing the piezoelectric vibrating bodies (2), (2a), and (2b) from being damaged by a drop impact and reducing noise caused by vibrations. The piezoelectric element vibration device for providing real-time vibration feedback according to any one of claims 1, 6, 8, and 9. A piezoelectric element vibration device that generates vibration by applying a driving voltage to piezoelectric vibrators (2), (2a), and (2b) in which a piezoelectric element layer (6) is disposed on an electrode substrate (4) made of a conductive material. And
In the piezoelectric element layer (6), an insulating member (10) for preventing the applied drive voltage from leaking is formed,
Piezoelectric vibrators (2), (2a) and (2b) are formed so as to surround the whole so as to increase the amount of vibration, to reduce vibration noise and to attach the piezoelectric vibrators (2), (2a) and (2b). A piezoelectric element vibration device for providing real-time vibration feedback, comprising a case (38).   The case (38) includes upper and lower coupling portions (40) and (42) for enclosing the piezoelectric vibrators (2), (2a) and (2b), and an electrode substrate is fitted into the lower coupling portion (42). The piezoelectric element vibration device for providing real-time vibration feedback according to claim 13, characterized in that the mounting portion (44) is configured.   The piezoelectric element vibration device for providing real-time vibration feedback according to claim 13, wherein the case (38) is formed of any one of natural rubber, synthetic rubber, and synthetic resin.   The piezoelectric vibrator (2) (2a) (2b) is characterized in that a weight piece (12) for increasing vibration is adhered and fixed to one or both sides. 14. A piezoelectric element vibration device that provides real-time vibration feedback according to any one of items 13 to 14.   The piezoelectric vibrator (2) (2a) (2b) is any one of a unimorph type, a bimorph type, and a multimorph type piezoelectric element vibration device, and characterized in that: 14. A piezoelectric element vibration device that provides real-time vibration feedback according to any one of items 13 to 14.   A protective tape (24) for preventing damage to the piezoelectric element layer (6) and preventing the weight piece (12) from falling off is attached to one side or both sides of the piezoelectric vibrator (2) (2a) (2b). The piezoelectric element vibration device for providing real-time vibration feedback according to any one of claims 1, 6, 8, 9, and 13.   On the surface of the piezoelectric vibrating body (2) (2a) (2b), a coating layer using any one of a soft synthetic resin and a synthetic rubber is formed, and sound generated by insulation and vibration is attenuated. 14. The piezoelectric element vibration device for providing real-time vibration feedback according to claim 1, wherein the piezoelectric element vibration device is configured as described above. Piezoelectric vibrators (2), (2a) and (2b) are portable terminals having a call function, medical devices, tablet PCs, game machines, vibrating mice, vibrating remote controllers, vibrating keypads, and protective cases for portable terminals that provide vibration feedback. The piezoelectric element vibration device for providing real-time vibration feedback according to claim 1, wherein the piezoelectric element vibration device is configured to be installed in a mobile terminal.