KR101594158B1 - Complex device and electronic device having the same - Google Patents

Abstract

The present invention relates to a composite device including a piezoelectric element, a WPC antenna provided on one surface of the piezoelectric element and two antennas spaced apart from each other in the vertical direction, and an NFC antenna provided outside the WPC antenna, Are presented.

Description

TECHNICAL FIELD [0001] The present invention relates to a composite device and an electronic device having the composite device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite device, and more particularly, to a composite device in which a plurality of functions including a piezoelectric speaker are integrated into one module and an electronic device having the same.

In recent years, compact, slimmer, and lighter weight portable electronic devices that can be used while the user is carrying it are more emphasized. In addition, not only a simple communication function but also a multipurpose function that can be used in various multimedia environments or the Internet environment are added, which is widely used as a so-called smart phone. In particular, a smart phone has a wider screen to be more suitably used in a multimedia environment, and a touch screen that can be driven by a touch method is generally adopted for the convenience of the user. In addition, the spread of payment methods by NFC (Near Field Communication) of portable electronic devices has been spreading, and there has been a growing demand for wireless communication systems in which a wireless charging method (WPC: Wireless Power Charge) Electronic devices are being released.

Meanwhile, a portable electronic device capable of reproducing a multimedia source has a built-in mono speaker that does not include its own speaker due to miniaturization, or provides only minimal sound to reduce power consumption even if included. Therefore, a separate speaker must be connected to allow the user to enjoy a multimedia source to reproduce at a sufficient volume.

However, since the conventional speaker has a large volume, it is difficult for the user to carry it. In other words, a conventional loudspeaker requires a loudspeaker. The larger the loudspeaker, the larger the amplification of the sound and the loudness of the vibrating sound depends on the strength and magnitude of the permanent magnet for vibrating the loudspeaker. In order to connect a conventional speaker to a portable electronic device, a separate connection line is required. Since a power supply must be supplied, the speaker body and the connection line must be carried at the same time, which is cumbersome. .

Meanwhile, Korean Patent No. 10-119861 discloses a speaker for a smartphone that does not require a separate power source.

The present invention provides a composite device in which a plurality of functions are integrated into a single module including a portable piezoelectric speaker with a small volume and is easy to carry, and an electronic apparatus having the composite device.

The present invention provides a composite device capable of being coupled to and detached from a portable electronic device, and an electronic device having the composite device.

A composite device according to an aspect of the present invention includes: a piezoelectric device; A WPC antenna provided on one surface of the piezoelectric element and connected with two antenna patterns spaced apart from each other in a vertical direction; And an NFC antenna provided outside the WPC antenna.

And a vibration transducer which is brought into contact with at least one area of the laminate in which the piezoelectric element, the WPC antenna and the NFC antenna are laminated, and is separated from the one surface of the laminate.

The WPC antenna includes a first WPC antenna pattern formed on a first sheet provided on one side of the piezoelectric element and a second WPC antenna pattern formed on a second sheet provided on the first sheet.

A first connection hole formed on the second sheet and connecting the first and second WPC antennas; and a second connection hole formed on the first sheet and connected to the first WPC antenna, .

The NFC antenna is formed on the second sheet on the outside of the second WPC antenna, and at least a part of the NFC antenna is formed to be cut off.

At least one connection hole formed on the first sheet, at least one second connection hole formed on the second sheet and connecting the NFC antenna and the connection pattern, And a second drawing pattern connected to the NFC antenna and drawn out to the outside.

The first sheet is a magnetic sheet, the second sheet is a non-magnetic sheet, and the piezoelectric element, the first and second sheets are simultaneously sintered.

The first and second sheets are made of a polymer, and are further provided with a cover sheet provided on the second sheet and a magnetic sheet provided so as to be separated from the other surface of the piezoelectric element.

A frame sandwiching an edge of the laminate including the first and second sheets, and a cover provided on at least one side of the frame.

A composite device according to another aspect of the present invention includes: a body coupled to and detachable from a rear surface of an electronic device; And a composite device module coupled to a predetermined region of the body, wherein the composite device module includes a piezoelectric speaker, a WPC antenna, and an NFC antenna.

The composite device module includes: a piezoelectric element; A WPC antenna provided on one surface of the piezoelectric element and connected with two antenna patterns spaced apart from each other in the vertical direction; And an NFC antenna provided outside the WPC antenna.

And a vibration transducer which is brought into contact with at least one area of the laminate in which the piezoelectric element, the WPC antenna and the NFC antenna are laminated, and is separated from the one surface of the laminate.

The WPC antenna includes a first WPC antenna pattern formed on a first sheet provided on one surface of the piezoelectric element, a second WPC antenna pattern formed on a second sheet provided on the first sheet, And a first connection pattern formed on the first sheet and connected to the first WPC antenna to be drawn out to the outside.

Wherein the NFC antenna comprises: an NFC antenna pattern formed on the second sheet outside the second WPC antenna and configured to break at least a portion; at least one connection pattern formed on the first sheet; At least one second connection hole formed on the first sheet and connecting the NFC antenna and the connection pattern, and a second extraction pattern formed on the first sheet and connected to the NFC antenna and drawn out to the outside.

The first sheet is a magnetic sheet, the second sheet is a non-magnetic sheet, and the piezoelectric element, the first and second sheets are simultaneously sintered.

The first and second sheets are made of a polymer, and further include a cover sheet provided on the second sheet and a magnetic sheet spaced apart from the other surface of the piezoelectric element.

The body has the same shape as the rear cover of the electronic device, and the rear cover of the electronic device is detached and then fastened.

An opening is formed in a predetermined region of the body, and the composite device module is inserted into the opening and fastened.

A predetermined region of the body protrudes outwardly, and a receiving space is provided inside the receiving space, so that the composite device module is inserted into the receiving space and fastened.

A first connection terminal having one side connected to the piezoelectric element and the other side exposed to the outside and connected to the audio output terminal on the back side of the electronic device; and a second connection terminal having one side connected to the WPC antenna and the NFC antenna, And is connected to the WPC terminal and the NFC terminal on the rear surface of the electronic device.

And a flip cover provided on one side of the body and covering a front surface of the electronic device.

According to another aspect of the present invention, there is provided an electronic apparatus to which a composite device module is coupled to a rear surface of the electronic apparatus, the electronic apparatus comprising: a body coupled to and detachable from a rear surface of the electronic apparatus; And a composite device module coupled to a predetermined region of the body, wherein the composite device module includes a piezoelectric speaker, a WPC antenna, and an NFC antenna.

The composite device module includes: a piezoelectric element; A WPC antenna provided on one surface of the piezoelectric element and connected with two antennas spaced apart from each other in a vertical direction; An NFC antenna provided outside the WPC antenna; And a vibration transducer which is brought into contact with at least one region of the laminate in which the piezoelectric element, the WPC antenna and the NFC antenna are laminated, and is disposed apart from one surface of the laminate.

The vibration transmitting member is provided so as to be spaced apart or closer to the piezoelectric element from the edge to the center, or to maintain the same interval.

In the composite device module, the vibration transducer is brought into contact with a vibration amplified object to amplify the negative pressure and the output from the piezoelectric speaker.

According to the embodiments of the present invention, a multi-function composite device can be manufactured by integrating a piezoelectric speaker, a WPC antenna, and an NFC antenna into one module. Further, a composite device module in which a body having the same shape as that of the rear cover of the portable electronic device is provided, and a piezoelectric speaker, a WPC antenna, and an NFC antenna are integrated into a predetermined region of the body may be combined.

Therefore, by connecting the body of the portable complex device to the back surface of the portable electronic device, the volume of the portable electronic device can be amplified by using the piezoelectric speaker, the electronic device can be wirelessly charged using the WPC antenna, It is possible to perform close range communication.

In addition, since a multi-function composite device can be manufactured in an ultra-thin form, it can be compact and can be easily carried.

1 to 3 are schematic views of a composite device module according to an embodiment of the present invention.
Figures 4 through 6 are schematic diagrams of a composite device module according to variants of an embodiment of the present invention;
7 to 9 are schematic views of a composite element module according to another embodiment of the present invention.
10-13 are schematic diagrams of a composite device according to an embodiment of the invention.
14-17 are schematic diagrams of a composite device according to another embodiment of the present invention.
18 to 20 are schematic views of an acoustic amplification box according to an embodiment of the present invention.
FIG. 21 shows data measured using an amplification box according to an embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely.

FIGS. 1 to 3 are schematic views of a composite device module according to an embodiment of the present invention, wherein FIG. 1 is an exploded perspective view of a composite device module, and FIGS. 2 and 3 are combined perspective views. That is, FIG. 2 is a partially coupled perspective view, and FIG. 3 is a fully coupled perspective view.

1 to 3, a composite element module according to an embodiment of the present invention includes a piezoelectric element 100, a first antenna pattern 210 provided on one surface of the piezoelectric element 100 and having a first antenna pattern 210 formed thereon, A sheet 200 and a second sheet 300 provided on the second sheet 200 and having a second antenna pattern 310 and a third antenna pattern 320 formed thereon. And may include a vibration transmitting plate 400 as a vibration transmitting body formed at least from at least two sides of the piezoelectric element 100 and spaced apart from one surface of the piezoelectric element 100. That is, the vibration transmission plate 400 can be in contact with both sides of the piezoelectric element 100, and the piezoelectric element 100, the first and second sheets 200 and 300 are brought into contact with the two sides of the stacked layers . The first antenna pattern 210 of the first sheet 200 and the second antenna pattern 310 of the second sheet 300 are connected to each other to form a WPC antenna. The pattern 320 is formed outside the second antenna pattern 310 to form an NFC antenna. The piezoelectric element 100 and the vibration transmission plate 400 constitute a piezoelectric speaker, and the piezoelectric speaker amplifies and outputs sound in a space between the piezoelectric element 100 and the vibration transmission plate 400. Accordingly, a composite device module according to an embodiment of the present invention may include a piezoelectric speaker 100, a first sheet 200, and a second sheet 300, Can be produced by co-firing.

The piezoelectric element 100 may be provided in a rectangular plate shape having a predetermined thickness, for example. That is, the piezoelectric element 100 is provided with two opposite surfaces, that is, upper and lower surfaces, and four sides may be provided along the edges of the upper surface and the lower surface. Of course, the piezoelectric element 100 may be formed in various shapes such as a square, a circle, an ellipse, and a polygon as well as a rectangle. Such a piezoelectric element 100 may include a substrate and a piezoelectric layer formed on at least one surface of the substrate. For example, the piezoelectric element 100 may be formed as a bimorph type in which a piezoelectric layer is formed on both surfaces of a substrate, or may be formed in a unimorph type in which a piezoelectric layer is formed on one surface of the substrate. At least one layer of the piezoelectric layer may be laminated, and preferably, a plurality of piezoelectric layers may be laminated. In addition, electrodes may be formed on the upper and lower portions of the piezoelectric layer, respectively. Here, the piezoelectric layer can be formed using, for example, a piezoelectric material of PZT (Pb, Zr, Ti), NKN (Na, K, Nb), BNT (Bi, Na, Ti) Further, the piezoelectric layers can be polarized in different directions and stacked. That is, when a plurality of piezoelectric layers are formed on one surface of the substrate, the piezoelectric layers may be alternately polarized in opposite directions. On the other hand, the substrate can be made of a material having characteristics such that vibration can be generated while maintaining a laminated structure of the piezoelectric layers. For example, metal, plastic, or the like can be used. However, the piezoelectric element 100 may not use a piezoelectric layer and a substrate which is a foreign substance. That is, the piezoelectric element 100 is provided with a piezoelectric layer which is not polarized in the central portion, and a plurality of piezoelectric layers polarized in different directions on the upper and lower portions thereof can be laminated. On the other hand, electrode patterns 110a and 110b to which a driving voltage is applied may be provided on predetermined regions of the piezoelectric element 100 at one side. The electrode patterns 110a and 110b are connected to a connection terminal (not shown) and can be connected to the electronic device 10 through the connection terminals.

The first sheet 200 is provided on one surface of the piezoelectric element 100 and the first antenna pattern 210 is formed on the upper surface. The sheet 200 includes first and second drawing patterns 220a and 220b connected to the first antenna pattern 210 and drawn out to the outside, a third antenna pattern 320 formed on the second sheet 300, 232 and 233 connecting the first antenna pattern 320 and the third and fourth lead patterns 240a and 240b connected to the third antenna pattern 320 and drawn out to the outside. The first sheet 200 may be provided in the same shape as the piezoelectric element 100. That is, the first sheet 200 may be provided in a substantially rectangular plate shape. At this time, the thickness of the first sheet 200 may be equal to or different from the thickness of the piezoelectric element 100. The first antenna pattern 210 may be formed in a predetermined number of turns by rotating the first sheet 200 in one direction from the center of the first sheet 200, for example. For example, the first antenna pattern 210 may have a predetermined width and spacing, and may be formed in a spiral shape that rotates outward in a counterclockwise direction. At this time, the line width and the interval of the first antenna pattern 210 may be the same or different. That is, the line width of the first antenna pattern 210 may be larger than the interval. Also, an end of the first antenna pattern 210 is connected to the first extraction pattern 220a. The first drawing pattern 220a is formed to have a predetermined width and is exposed to one side of the first sheet 200. [ For example, the first drawing pattern 220a is formed to extend in the longitudinal direction of the first sheet 200 and to be exposed at one side of the first sheet 200. [ That is, the first extraction pattern 220a is formed so as to be exposed to the side where the electrode patterns 110a and 110b of the piezoelectric element 100 are formed, and is spaced apart from the first extraction pattern 220a. The second extraction pattern 220b is spaced apart from the first extraction pattern 220a and formed in the same direction as the first extraction pattern 220a. The second extraction pattern 220b is connected to the second antenna pattern 310 formed on the second sheet 200. [ Here, the second extraction pattern 220b may be longer than the first extraction pattern 220a. The plurality of connection patterns 231, 232, and 233 are provided to connect the third antenna pattern 320 formed on the second sheet 300. That is, the third antenna pattern 320 is formed in a semicircular shape in which at least two regions are broken. A plurality of connection patterns 321, 322, and 323 are formed on the first sheet 200 to connect the semi- do. The connection pattern 321 is formed in a predetermined width and length in a direction between the electrode patterns 110a and 110b of the piezoelectric element 100 and the first drawing pattern 220a. The connection patterns 322 and 323 are formed at positions opposite to the connection pattern 321 in the long side direction, that is, on the other short side where the first and second extraction patterns 220a and 220b are not formed, And is formed with a predetermined width and length along the other short side direction. Further, the connection patterns 322 and 323 are formed to be spaced apart from each other. The third and fourth lead patterns 240a and 240b are spaced apart from the second lead pattern 220b and are formed to be exposed at one side. On the other hand, a region corresponding to the electrode patterns 110a and 110b of the piezoelectric element 100, in which the one side extraction patterns 220 and 240 formed with the extraction patterns 220 and 240 are not formed, 250a, and 250b are spaced apart from each other. The lead patterns 220 and 240 are connected to a connection terminal (not shown) and can be connected to the electronic device 10 through the lead terminals. Meanwhile, the first sheet 200 may be made of magnetic ceramic. For example, the first sheet 200 can be formed using NiZnCu or NiZn magnetic material. Specifically, NiZnCu-based magnetic sheet there is _{Fe 2 O 3, ZnO, NiO} , CuO may be mixed as a magnetic _{material, Fe 2 O 3, ZnO,} NiO and CuO of 5: 2: 2 can be mixed in the ratio of 1 have. The first sheet 200 is made of a magnetic ceramic, thereby shielding electromagnetic waves generated from the WPC antenna and the NFC antenna or absorbing electromagnetic waves to suppress interference of electromagnetic waves.

The second sheet 300 is provided on the first sheet 200 and the second antenna pattern 310 and the third antenna pattern 320 are formed apart from each other. A plurality of holes 331, 332, 333, 334, 335, 336, 337, 338 are formed in the second sheet 300. The second sheet 300 may have the same shape as the piezoelectric element 100 and the first sheet 200. That is, the second sheet 300 may be provided in a substantially rectangular plate shape. At this time, the thickness of the second sheet 300 may be equal to or different from the thickness of the piezoelectric element 100 and the first sheet 200. That is, the second sheet 300 may be thinner than the piezoelectric element 100 and may have the same thickness as the first sheet 300. The second antenna pattern 310 may be formed in a predetermined number of turns by rotating the second sheet 300 in one direction from the center of the second sheet 300, for example. For example, the second antenna pattern 310 may have a predetermined width and spacing, and may be formed in a spiral shape that rotates clockwise outward. That is, a second drawing pattern 220b formed on the first sheet 200 is formed in a spiral shape starting from the same area as the first antenna pattern 210 formed on the first sheet 200 and rotating clockwise, And overlapping regions can be formed. The line width and the interval of the second antenna pattern 310 may be the same as the line width and the interval of the first antenna pattern 210 and the second antenna pattern 310 and the first antenna pattern 210 may overlap. have. Holes 331 and 332 are formed at the start and end points of the second antenna pattern 310 and conductive materials are embedded in the holes 331 and 332, respectively. The starting point of the second antenna pattern 310 is connected to the starting point of the first antenna pattern 210 through the hole 331 and the end point of the second antenna pattern 310 is connected to the starting point of the second antenna pattern 310 through the hole 332, And is connected to a predetermined region of the pattern 220b. The third antenna pattern 320 is spaced apart from the second antenna pattern 310 and is formed at a plurality of turns along the edge of the second sheet 300. That is, the third antenna pattern 320 is provided to surround the second antenna pattern 310 from outside. At this time, the third antenna pattern 320 is formed in a shape that is broken at a predetermined region on the second sheet 300. That is, the third antenna pattern 320 may not be formed of a plurality of turns connected to each other, but may be formed in a shape that is cut off in at least two regions and is not electrically connected to each other on the second sheet 300. A plurality of holes 333, 334, 335, 336, 337, and 338 are formed between the third antenna patterns 320 that are cut off from each other. The plurality of holes 333, 334, 335, 336, 337 and 338 are filled with a conductive material and connected to the connection patterns 231, 232 and 233 of the first sheet 200, respectively. Accordingly, the third antenna pattern 320 is formed in a state of being broken in at least two areas, but the plurality of holes 333, 334, 335, 336, 337, 338 and the connection patterns 231, 232, 233, respectively. A plurality of through holes 341 and 342 are formed in the second sheet 300 to expose the through holes 250a and 250b of the first sheet 200 and the plurality of outgoing patterns 220 and 240, . That is, the through holes 341a and 341b are formed at the same positions as the through holes 250a and 250b of the first sheet 200 to expose the electrode patterns 110a and 110b of the piezoelectric element 100, respectively. Four through holes 342 are formed to expose a plurality of the first sheet 200, that is, four outgoing patterns 220 and 240. Meanwhile, the second sheet 300 may be made of a material different from that of the first sheet 200. For example, the second sheet 300 may be made of a non-magnetic ceramic, and may be manufactured using a low temperature co-fired ceramic (LTCC).

The vibration transmitting plate 400 may be spaced apart from at least one surface of the second sheet 300 by a predetermined distance. For example, the vibration transmitting plate 400 is provided such that at least two edges of the vibration transmitting plate 400 are bonded to opposite sides of the piezoelectric element 100, and the remaining area of the vibration transmitting plate 400 is spaced apart from the second sheet 300 . That is, the vibration transmitting plate 400 may be adhered to the side surface of the piezoelectric element 100, or may be adhered to the side surface of the laminated body in which the piezoelectric element 100, the first and second sheets 200 and 300 are stacked . At this time, the vibration transmitting plate 400 may be formed in a dome shape, for example, such that the distance from the edge of the second sheet 300 to the center of the second sheet 300 is increased. Of course, the vibration transmitting plate 400 may be provided in a dome shape so that all four edges thereof are bonded to at least the side surface of the piezoelectric element 100. For this purpose, the vibration transmitting plate 400 may be provided larger than the piezoelectric element 100, for example, along the shape of the piezoelectric element 100. That is, the vibration transmitting plate 400 is provided in a quadrangular shape along the shape of the piezoelectric element 100, and at least the width of a region bonded to the side surface of the piezoelectric element 100 and the width Can be provided larger than these considering the distance. Thus, the space between the second sheet 300 and the vibration transmission plate 400 can be a resonance space of the piezoelectric speaker. The vibration transmitting plate 400 serves to transmit the vibration and resonance of the piezoelectric element 100 to the outside and functions as a piezoelectric speaker for amplifying the sound of the electronic apparatus together with the piezoelectric element 100. [ Further, when the vibration transmitting plate 400 side is in contact with a vibration amplifying object such as a table, a box, etc., the output and the sound pressure can be further amplified and output. Here, the vibration transmitting plate 400 may be made of metal, plastic, or the like, and may be made of at least a double structure by laminating different kinds of materials. A material having a flexible characteristic, for example, a resin such as PET . The distance between the second sheet 300 and the vibration transmitting plate 400 may vary depending on the size of the piezoelectric element 100, the receiving space of the electronic device in which the composite element module is accommodated, the desired output and the sound pressure.

The antenna patterns 210, 310, and 320, the lead patterns 220 and 240, and the connection patterns 231, 232, and 233 are formed using a copper foil or a conductive paste. When the conductive patterns are used, The paste can be printed on a sheet by various printing methods. Examples of the conductive particles of the conductive paste include Au, Ag, Ni, Cu, Pd, Ag coated Cu, Ag coated Ni, Metal particles of Ni coated Cu and Ni coated graphite and carbon nanotubes, carbon black, graphite, silver coated graphite and the like can be used. have. The conductive paste is applied to a sheet by a method such as printing as a material in which conductive particles are uniformly dispersed in an organic binder having fluidity, and exhibits electrical conductivity by heat treatment such as drying, curing, firing and the like. As the printing method, roll-to-roll printing such as screen printing or flat printing such as gravure printing, inkjet printing, or the like can be used.

As described above, the composite device module according to one embodiment of the present invention can be manufactured by integrating the piezoelectric speaker, the WPC antenna, and the NFC antenna. Therefore, it is possible to amplify the sound of the electronic device using one module, charge the electronic device wirelessly, and enable short-range communication. Further, by implementing the multifunctional function as a single module, the area occupied by each function can be reduced compared with that of each function.

Meanwhile, the composite device module according to an embodiment of the present invention can be modified into various shapes. Such a modification will be described with reference to FIGS. 4 to 6. FIG.

As shown in FIG. 4, the composite device module is composed of a vibrator 100, a first sheet 200, and a second sheet 300, which are separated from the upper surface of the laminate, And a second vibration transmission plate 420 as a vibration transmission body provided in a dome shape spaced apart from a lower surface from two sides of the laminated body. That is, the composite device module according to one modification of the present invention includes first and second vibrating transmission parts 200 and 300 so as to be spaced apart from the upper surface and the lower surface of the laminated body of the piezoelectric element 100, Plates 410 and 420 may be provided. Here, the first and second vibration transmission plates 410 and 420 may be bonded to the same side of the laminate or may be bonded to different sides. That is, the edges of the second vibration transmission plate 420 may be bonded to the two sides of the laminate to which the first vibration transmission plate 410 is bonded, which is perpendicular to the two sides. Of course, the edges of the first and second vibration transmitting plates 410 and 420 may be adhered to all sides of the laminate.

5, the composite element module includes a piezoelectric element 100, a vibration transmission plate (not shown) formed in a dome shape and spaced apart from the upper surface of the laminate from at least two sides of the laminate of the first and second sheets 200 and 300, (400), and at least one pattern (430) provided in a predetermined area on the vibration transmission plate (400). The pattern 430 may be formed by cutting or removing at least one region of the vibration transmitting plate 400 and attaching the same material or material of the same material as the vibration transmitting plate 400 on the vibration transmitting plate 400 . The pattern 430 may be formed to have a predetermined length upward from the area in contact with the laminate. In addition, the pattern 430 may be provided on at least one side of the vibration transmission plate 400.

6, the composite element module includes a piezoelectric element 100, a vibration transmission plate 200 spaced at equal intervals from at least one side of the laminate from at least two sides of the laminate of the first and second sheets 200 and 300, (400). In other words, the composite device module according to one embodiment and modified examples of the present invention described with reference to Figs. 1 to 4 may be configured such that the vibration transmission plate 400 is formed on at least one surface of the laminate, for example, However, in the composite device module of FIG. 6, the separation distance between the laminate and the vibration transmission plate 400 is the same. Also, though not shown, the distance between the laminate and the vibration transmitting plate 400 can be increased from the two edges of the laminate to a predetermined area, and the same distance can be maintained in the remaining area. As a result, the composite device module of the present invention is formed such that the vibration transmission plate 400 is separated from at least one surface of the laminate by a predetermined distance. The edge of the vibration transmitting plate 400 may be in contact with the edge of one side of the laminated body, although the edge of the vibration transmitting plate 400 is in contact with the side surface of the laminated body.

1 to 6, the vibration transmitting plate 400 is provided so as to be spaced apart from the two edges of the laminated body to the center, but the vibration transmitting plate 400 may be formed to extend from the two edges of the laminated body to the center As shown in FIG. Further, the distance between the laminate and the vibration transmitting plate 400 may be different from each other in at least one area and at least one other area. That is, the vibration transmitting plate 400 may be provided with a predetermined curvature and may be adhered to the edge of the laminate.

The composite device module according to an embodiment of the present invention and its modifications includes a first and second sheets 200 and 300 on which a WPC antenna and an NFC antenna are formed on a piezoelectric device 100 and are simultaneously sintered, A vibration transmitting body 400 is provided on a side surface of the laminate so as to be separated from the first sheet 300, for example. However, the composite device module of the present invention can be implemented in various forms by stacking the piezoelectric element 100, the WPC antenna, and the NFC antenna, and an example thereof will be described with reference to FIG. 7 to FIG.

FIGS. 7 to 9 are schematic views of a composite device module according to another embodiment of the present invention, wherein FIG. 7 is an exploded perspective view, FIG. 8 is an assembled perspective view, and FIG.

7 to 9, a composite device module according to another embodiment of the present invention includes a piezoelectric device 100, a first antenna pattern 210 provided on one surface of the piezoelectric device 100, A sheet 200 and a second sheet 300 provided on the first sheet 200 and having a second antenna pattern 310 and a third antenna pattern 320 formed thereon. The cover sheet 500 provided on the second sheet 300 and the magnetic sheet 550 provided below the piezoelectric element 100 and the first and second sheets 200 and 300 and the cover sheet 500 And a frame 600 provided at an edge of the laminated body. Here, the piezoelectric element 100 may be smaller than the first and second sheets 200 and 300, and the first and second sheets 200 and 300 may be made of a polymer material. In addition, the first and second sheets 200 and 300 function as diaphragms for amplifying the vibration of the piezoelectric element 100. That is, the first and second sheets 200 and 300 function as a WPC antenna and an NFC antenna, and also function as diaphragms. The other contents, that is, the shape of the antenna pattern, the extraction pattern, the connection pattern, and the like are the same as those described in the embodiment of the present invention, and the description thereof will be omitted.

The first and second sheets 200 and 300 may be made of polymeric or pulp based materials. For example, the first and second sheets 200 and 300 may be made of a resin film, and a material having a Young's modulus of 1 MPa to 10 GPa and a large loss coefficient such as ethylene-propylene rubber or styrene-butadiene rubber may be used. These first and second sheets 200 and 300 can be sandwiched by the frame 600 as shown in Fig.

The cover sheet 500 is provided on the second sheet 300 and covers the second and third antenna patterns 310 and 320 formed on the second sheet 200. The cover sheet 500 may be made of a polymer-based or pulp-based material. For example, the cover sheet 500 may be made of a resin film, such as an ethylene propylene rubber type or styrene butadiene rubber type material having a Young's modulus of 1 MPa to 10 GPa and a large loss coefficient. That is, the cover sheet 500 can use the same material as the first and second sheets 200 and 300. Also, the cover sheet 500 may be provided in the same size as the first and second sheets 200 and 300, and the edges may be sandwiched by the frame 600 as shown in FIG. Meanwhile, an adhesive may be provided between the second sheet 300 and the cover sheet 500, and the cover sheet 500 may be attached to the second sheet 300 by an adhesive. Also, an adhesive may be provided between the first sheet 200 and the second sheet 300 to adhere them. Such an adhesive may include an adhesive tape using an adhesive material such as rubber, acrylic, or silicone. When an adhesive tape is used, the adhesive tape may have the same shape and size as the cover sheet 500. The edge of the adhesive tape can be held by the frame 600 together with the edge of the cover sheet 500 by providing the adhesive tape in the same size as the cover sheet 500. [

The magnetic sheet 550 may be provided below the piezoelectric element 100 and spaced apart from the piezoelectric element 100. At this time, the magnetic sheet 550 may face the electronic device. The magnetic sheet 550 is provided to shield electromagnetic waves that may be generated from the NFC antenna and the WPC antenna, or absorb electromagnetic waves to suppress interference of electromagnetic waves.

The frame 600 holds the composite element module by sandwiching the edges of the first and second sheets 200, 300, the cover sheet 500, and the magnetic sheet 550. Further, a cover 610 may be further provided to cover the cover sheet 500 at a predetermined distance from the upper surface of the cover sheet 500. That is, the frame 600 may be used alone, or the cover 610 may be provided on the frame 600. Thus, a predetermined space is provided between the composite element module and the cover 610 by the cover 610, and the space becomes a vibration space of the piezoelectric speaker.

Such a composite device module may be provided in contact with an electronic device such as a smart phone, and the piezoelectric device 100 side may be in contact with the main body of the electronic device. In addition, such a composite device module may be provided so as to be coupled to and detachable from the electronic device 10. [ For example, a body having the same shape as that of the battery cover that covers the rear surface of the electronic device 10 may be provided, and a composite device module may be coupled to a predetermined region of the body so that the body may be mounted on the rear surface of the electronic device. In addition, a predetermined groove may be formed in a predetermined rear area of the electronic device, and the composite device module may be mounted in the groove. The composite device according to one embodiment of the present invention will now be described.

10 to 14 are schematic views of a composite device according to an embodiment of the present invention, which is a schematic view of a back cover integral type composite device of an electronic device. That is, FIG. 10 is a front perspective view of a composite device according to an embodiment of the present invention, and FIG. 11 is a schematic view for explaining a fastening method of a composite device module and a composite device module. 12 is an exploded perspective view of the composite device module, and Figs. 13 and 14 are schematic views of a composite device according to a modification of an embodiment of the present invention.

10 to 12, a composite device according to an embodiment of the present invention includes a body 1000 to be fastened to a rear surface of an electronic device 10, an electronic device 10 provided in one area of the body 1000, (Not shown). The body 1000 provided with the composite device module 2000 can be fastened after the rear cover covering the rear surface of the electronic device 10 is separated. Of course, the body 1000 may be produced to cover the rear surface of the electronic device 10 as a back cover. 13, a flip cover 3000, which is provided on one side of the body 1000 and is provided to cover the front surface of the electronic device 10 and covers the front surface of the electronic device 10, .

First, the electronic device 10 to which the present invention is applied may include a portable terminal such as a tablet PC, a smart phone, etc. In the present embodiment, a smart phone will be described as an example. The electronic device 10 is provided in a rectangular shape having a predetermined thickness, and a display unit, a hydration unit, a key button, and the like may be provided on the front surface thereof, and a circuit device or the like may be provided therein. On the other hand, the electronic device 10 may be provided such that the rear cover covering the rear surface thereof can be detached and coupled. When the rear cover is removed, the battery is fastened to a predetermined area on the rear surface of the electronic device 10, the NFC terminal and the WPC terminal can be exposed, and a camera can be provided.

The body 1000 is provided to be detachable and engageable with the electronic device 10. [ That is, the body 1000 may be provided in the same shape as the rear cover that covers the rear surface of the electronic device 10, and may be portable and may be fastened to the rear surface of the electronic device 10 after detaching the rear cover. Of course, the electronic device 10 may be produced in a state where the body 1000 itself is fastened to the rear surface of the electronic device 10 as a rear cover. At least one fastening groove (not shown) is formed at the edge of the rear surface of the electronic device 10 so that the body 1000 can be separated from and coupled to the electronic device 10, At least one fastening protrusion (not shown) may be formed on the body 1000. Therefore, the fastening protrusion of the body 1000 is inserted into the fastening groove of the electronic device 10, so that the body 1000 can be fastened to the electronic device 10. [ On the other hand, the body 1000 can be flexibly manufactured to allow bending or the like to be deformed within a predetermined range. For this purpose, the body 1000 may be made of polyimide (PI) or polycarbonate (PC), or may be made of metal. Of course, the body 1000 may be made of the same material as the back cover of the electronic device 10. [ Polyimide (PI) is a thermally conductive plastic, excellent in mechanical strength, and excellent in thermal and chemical stability. Polycarbonate (PC: polycarbonate) is a thermoplastic plastic that has excellent heat resistance, impact resistance, optical properties, and is easy to process. Meanwhile, a predetermined first opening 1100 is formed in the body 1000 so that the composite device module 2000 can be inserted. Of course, a second opening 1200 may be formed in the body 1000 to expose a camera (not shown) exposed on the rear surface of the electronic device 10. [ That is, the first opening 1100 is inserted into the piezoelectric speaker module 2000, and the second opening 1200 allows the camera to be exposed from the outside.

The composite device module 2000 may be inserted into the first opening 1100 of the body 1000 and fixed to a predetermined region of the body 1000. 1 to 7, a first sheet 200 on which a part of the WPC antenna is formed, a second sheet 200 on which a part of the WPC antenna and the NFC antenna are formed, 300). 12, the laminated body of the piezoelectric element 100, the first sheet 200 and the second sheet 300, and the laminated body of the laminated body, A bottom vibration transmitting case 800 as a vibration transmitting body provided below the laminated body, and a top cover 900 provided on the upper side of the laminated body. That is, first and second sheets 200 and 300 are provided between one surface of the piezoelectric element 100 and the bottom vibration transmission case 800, and a top cover 900 is provided on the other surface of the piezoelectric element 100 do. A first adhesive tape (not shown) for adhering to the bottom vibration transmitting case 800 and a laminated body including the piezoelectric element 100 and a first adhesive tape (not shown) for bonding the piezoelectric element 100 and the top cover 900 2 adhesive tape (not shown). Here, the bottom vibration transmission case 800 is provided to be spaced apart from the first surface of the second seat 300 by a predetermined distance to function as a vibration transmission plate of the piezoelectric element 100. The bottom vibration transmission case 800 has a structure different from that of the vibration transmission plate, The term " bottom vibration transmission case 800 "

The connection terminals 710 and 720 are provided in a predetermined area on the laminate and exposed to the outside of the composite device module 2000. The connection terminal 710 is provided to connect the piezoelectric device 100 and the electronic device 10 and the connection terminal 720 is provided to connect the electronic device 10 with the WPC antenna and the NFC antenna. That is, the connection terminal 710 is connected to the output terminal of the electronic device 10 to supply a predetermined power and sound source to the piezoelectric element 100, and the connection terminal 720 is connected to the output terminal of the electronic device 10, NFC terminals (not shown) and WPC terminals (not shown). Therefore, the power source and the sound source are supplied from the electronic device 10 through the connection terminal 710, the piezoelectric speaker is driven, the electronic device 10 can be charged using the WPC antenna through the connection terminal 710, Terminal to enable short-range communication. For example, FPCB (Flexible Printed Citic Board) can be used as the connection terminals 710 and 720. Meanwhile, the connection terminal 700 may be fixed to a predetermined area of the body 1000 such that a portion of the connection terminal 700, which is exposed to the outside of the composite element module 2000, The connection terminals 710 and 720 can be adhered and fixed.

The bottom vibration transmitting case 800 receives the laminate including the piezoelectric element 100 and is inserted and fastened to the first opening 1100 of the body 1000. The bottom vibration transmission case 800 includes a base 810 and a coupling portion 820 protruded upward from one side of the base 810. The base 810 is larger than the first opening 1100 of the body 1000 and can be exposed to the rear surface of the body 1000. Accordingly, the base 810 may protrude from the rear surface of the body 1000 on the rear surface of the body 1000. [ In addition, the base 810 may be provided in various shapes such as a square, a circle, and a polygon, and may be provided in an elliptical shape, for example, as shown in FIG. The base 810 may be made of the same material as the body 1000. In addition, the base 810 may be provided with a flat inner surface or with a predetermined curved surface. That is, the base 810 may have a predetermined curved surface such that the inner surface facing the second sheet 300 is spaced apart from the second sheet 300 by a predetermined distance, and the distance from the edge to the center is further away. The fastening portion 820 is protruded in a predetermined shape on the base 810 to house the laminated body inward. For this, the fastening portion 820 may be formed in the form of a laminate, and may be formed to protrude upward from the base 810. Therefore, the side surface of the laminate can be fixed in contact with the inner surface of the fastening portion 820. In addition, the bottom vibration transmission case 800 may include a stepped portion that is higher than the base 810 inside the fastening portion 820. The step portion may be provided at a lower height than the side portion on the inner side of the two side portions facing each other, for example, and the edge of the laminate is attached to the step portion through the first adhesive tape. Further, since a laminate is provided on the step portion, a predetermined space is provided between one side of the laminate and the inner plane of the bottom vibration transmitting case 800 facing the bottom side, that is, the inner side of the base 810.

The top cover 900 is provided to protect the laminate from physical force from the outside, and is provided to cover one surface of the piezoelectric element 100. That is, the top cover 900 can be attached to one edge of the piezoelectric element 100 using the second adhesive tape. Such a top cover 900 can be made of a thin plate material which has a large strength and hardness and does not bend well. For example, stainless steel or the like can be used. When the top cover 900 contacts one surface of the piezoelectric element 100, when the piezoelectric element 100 vibrates, the top cover 900 collides with the top cover 900 and vibrations of the piezoelectric element 100 are transmitted through the top cover 900 Is transmitted to the electronic device (10), and the vibration force of the piezoelectric element (100) may be lowered. In order to prevent this, a cushioning member (not shown) may be provided between the piezoelectric element 100 and the top cover 900. That is, the cushioning material is provided at two edges of the piezoelectric element 100 so that the top cover 900 and the piezoelectric element 100 maintain a predetermined gap.

14, a cushioning agent 1300 may be provided on the inner surface of the body 1000 so as to surround the composite element module 2000. The cushioning agent 1300 is provided so that the volume space of the composite element module 2000 is provided and the joint of the electronic device 10 due to the vibration of the composite element module 2000 can be eliminated. Here, the cushioning material 1300 may be formed of, for example, a silicone material, and may be provided in various shapes such as a circular shape and a square shape so as to surround the composite device module 2000. The cushion material 1300 may be attached to the body 1000 or may be inserted into a predetermined accommodation space 1310 provided on the body 1000. That is, first and second barrier ribs having predetermined intervals are provided so as to surround the composite device module 2000, and the cushion material 1300 can be inserted between the first and second barrier ribs. If the height of the cushion 1300 is too high, the body 1000 can not be fastened to the electronic device 10, so that the electronic device 10 It is preferable that the cushion 1300 is provided at a height at which the body 1000 can be fastened.

15 to 17 are schematic views of a portable piezoelectric speaker according to another embodiment of the present invention. 15 and 16 are a schematic view and an exploded perspective view of a portable piezoelectric speaker according to another embodiment of the present invention, and FIG. 17 is a schematic view of a portable piezoelectric speaker according to a modification thereof.

15 and 16, a portable piezoelectric speaker according to another embodiment of the present invention includes a body 1000 to be fastened to a rear surface of an electronic device 10, And a power supply unit 4000 provided in one area of the body 100 and supplying power to the composite device module 2000. [ In addition, as shown in FIG. 17, the electronic device 10 may further include a flip cover 3000 capable of covering a front surface of the electronic device 10 from one side of the body 1000.

The body 1000 includes a first region 1000a corresponding to the rear surface of the electronic device 10 and a second region 1000b provided below the first region 1000a and provided with a power supply unit 4000 . That is, the body 1000 includes a first region 1000a corresponding to the lower side of the electronic device 10, a first region 1000a provided in the size of the electronic device 10 and coupled to the rear side of the electronic device 10, The second region 1000b may be further provided on the lower side. At this time, the electronic device 10 may be fastened to the first area 1000a of the body 1000 with the rear cover removed. That is, the body 1000 is fastened to the rear surface of the electronic device 10 after the rear cover of the electronic device 10 is removed, as in the embodiment of the present invention. An intermediate wall 1000c higher than the bottom surface of the body 1000 may be provided between the first area 1000a and the second area 1000b. The intermediate wall 1000c may be provided at a lower side, for example, where the connector of the electronic device 10 is provided. In the first region 1000a of the body 1000, a plurality of fastening protrusions (not shown) are provided at the edges and inserted and fastened into fastening grooves (not shown) of the electronic device 10, and the intermediate wall 1000c And may be formed at the same height as the lower side of the electronic device 10 and may be in contact with the lower side. At this time, a center portion corresponding to the connector of the electronic device 10, for example, may be removed in the size of the connector to form the first groove 1310 in the intermediate wall 1000c. In addition, the intermediate wall 1000c may be formed with a second groove 1320 by removing a predetermined area spaced apart from the central portion to one side by a predetermined size. A first opening 1100 of a predetermined size is formed in the first region 1000a of the body 100 and a piezoelectric speaker module 2000 is inserted into the first opening 1100. [ A space in which a DMB antenna or a Bluetooth antenna is mounted is formed at a predetermined area of the first area 1000a of the body 1000, for example, below the first opening 1100 where the piezoelectric speaker module 2000 is inserted . The space in which the antenna is mounted may correspond to, for example, a space in which the battery of the electronic device 10 is mounted. Meanwhile, an upper cover 1400 may be provided to cover the first area 1000a on the first area 1000a of the body 1000. [ In other words, the composite device module 2000, the antenna, and the like may be provided in the first area 1000a of the body 1000 so that the upper cover 1400 covers the first area 1000a and prevents them from being exposed to the outside. Meanwhile, the upper cover 1400 may be provided at least in the size of the first region 1000a.

The power supply unit 4000 may be provided in one area of the body 1000 corresponding to the lower side of the electronic device 10. [ That is, the power supply unit 4000 may be provided in the second region 1000b extending from the first region 1000a of the body 100. [ The power supply unit 4000 is provided for supplying power to the composite device module 2000, that is, the piezoelectric speaker, and can generate and supply power necessary for driving the piezoelectric speaker. The power supply unit 4000 may be connected to an external power supply terminal or a data supply terminal. Also, the power supply unit 4000 may be connected to the electronic device 10. [ That is, the external power supply terminal or the data supply terminal may be connected to one side of the power supply unit 4000, and the electronic apparatus 10 may be connected to the other side of the power supply unit 4000. The power supply unit 4000 may include a battery 4100, a circuit board 4200, first and second connectors 4300 and 4400, and a lower cover 4500. The battery 4100 may be charged by a power source supplied through a power supply terminal connected to the first connector 4300. The circuit board 4200 has first and second connectors 4300 and 4400 on the upper side and a battery 4100 on the lower side. Also, the first connector 4300 is connected to an external power supply terminal or a data supply terminal, and the second connector 4400 is connected to the electronic device 10. The power supply unit 4000 will be described in more detail as follows. First, a portion of the second region 1000b corresponding to the first groove 1310 of the intermediate wall 1000c is removed to form the third groove 1330. [ The first connector 4300 is provided to correspond to the third groove 1330 and the second connector 4400 is provided to correspond to the first groove 1310. [ The first connector 4300 is embedded in the power supply unit 4000 so as not to be exposed to the outside and the second connector 4400 is exposed to the first area 1000a. That is, when the battery 4100, the circuit board 4200, the first and second connectors 4300 and 4400 are provided in the second area 1000b and the lower cover 4500 is covered with the battery 4100, the power supply part 4000 And the second connector 4400 is protruded on the upper side of the power supply unit 4000. The second connector 4400 is connected to the first connector 4300 and the second connector 4400, Also, the first connector 4300 may be provided in a size such that a power supply terminal or a data supply terminal can be inserted, and the second connector 4400 may be provided in a size that can be inserted into the connector of the electronic apparatus 10 have. That is, the power supply terminal or the data supply terminal is inserted into the first connector 4300, and the second connector 4400 is inserted into the connector of the electronic apparatus 10. And is connected to the circuit board 4200 provided below the first and second connectors 4300 and 4400. A battery 4100 is provided below the circuit board 4200 and a connection line 4210 may be formed extending from one area of the circuit board 4200. [ Accordingly, the circuit board 4200 can charge the battery 4100 by the power supplied through the first connector 4300 and the power of the battery 4100 can be supplied through the connection line 4210 to the piezoelectric speaker module 2000). Here, a power amplifier circuit may be provided on the circuit board 4200, and the power supplied to the piezoelectric speaker may be amplified by using a power amplifier circuit. That is, the piezoelectric speaker may be driven by a power source higher than the driving power of the electronic device 10, and the driving power of the piezoelectric speaker may be generated and supplied from the power supply unit 4000. The connection line 4210 provided on one side of the circuit board 4200 is connected to the piezoelectric speaker module 2000 provided in the first region 1000a through the second groove 1320 of the intermediate wall 100c. Meanwhile, since the second connector 4400 is connected to the electronic device 10, power or data can be supplied to the electronic device 10 through the first and second connectors 4300 and 4400. Therefore, the electronic apparatus 10 can be charged while amplifying the volume by using the portable piezoelectric speaker. At this time, when the electronic device 10 is charged, the battery 4100 of the power supply unit 4000 may be charged together, and the piezoelectric speaker may be driven by the battery 4100. [

The body 1000, to which the composite device 2000 according to the exemplary embodiment of the present invention is coupled, contacts the rear surface of the electronic device 10 to primarily amplify the sound output from the electronic device 10. [ Then, the electronic apparatus 10 to which the body 1000 is fastened is brought into contact with a predetermined object so that the primary amplified sound can be secondarily amplified. An acoustic amplification box of a predetermined shape can be used to amplify the sound of the electronic device 10. The acoustic amplification box will be described with reference to FIGS. 18 to 21. FIG.

FIG. 18 is a perspective view of an acoustic amplification box according to the present invention, FIG. 19 is a rear view of the acoustic amplification box, and FIG. 20 is a sectional view of the acoustic amplification box. 21 is a graph comparing frequency characteristics using an acoustic amplification box and frequency characteristics of a dynamic speaker.

18 to 20, the acoustic amplification box 5000 according to the present invention may include a body 5100 having a predetermined space formed therein. The vibration transmitting portion 5200 may be provided on one side of the body 5100 and the supporting portion 5300 may be provided on the other side of the body 5100. That is, the acoustic amplification box according to an embodiment of the present invention may be formed only of the body 5100 without the vibration transmission portion 5200 and the support portion 5300 but with a predetermined inner space.

The body 5100 includes a substantially rectangular top plate 5110 and a bottom plate 5120 and a plurality of substantially rectangular side wall plates 5130 provided at the edges between the top plate 5110 and the bottom plate 5120. That is, an upper plate 5110 and a lower plate 5120 are provided so as to face each other and four side wall plates 5130 are provided at an edge between the upper plate 5110 and the lower plate 5120. Accordingly, the body 5100 may be provided in a substantially hexahedral shape. The top plate 5110 may be defined as a side on which the electronic device 10 including a portable terminal such as a smart phone is placed and the bottom plate 5120 may be defined as a side facing the top plate 5110 and facing the ground. Here, the top plate 5110 may be larger than the size of the electronic device 10, so that one side of the electronic device 10 can be brought into contact with the top plate 5110 to be placed thereon. In addition, the lower plate 5120 may be provided in the same size and shape as the upper plate 5110. The body 5100 is formed in a substantially hexahedron so that a predetermined resonance space is provided inside the body 5100. Of course, the body 5100 may be provided in various solid structures such as a cylinder, a polyhedron, or the like. For example, the upper plate 5110 and the lower plate 5120 are respectively provided in a circular shape, and the side wall plate 5130 is provided in a band shape at the edge between the upper plate 5110 and the lower plate 5120, And may be provided in a cylindrical shape. In addition, a resonance hole 5100a having a predetermined size may be provided in a predetermined area of the lower plate 5120. [ By providing the resonance hole 5100a, the air inside the body 5100 can be discharged to the outside. Therefore, even if the output of the electronic device 10 is low, the volume can be sufficiently amplified and the bass can be heard clearly. The resonance hole 5100a may be provided, for example, in a circular shape, but its shape is not limited. That is, the resonance hole 5100a may be formed of a polygon such as an ellipse, a rectangle, or a pentagon. At least one resonance hole 5100a may be provided. For example, one resonance hole 5100a may be provided in the central area of the bottom plate 5120, and at least two or more of the resonance holes 5100a may be provided in at least two areas of the bottom plate 5120. Of course, at least one resonance hole 5100a may be provided in at least one of the side wall plates 5130 as well as the bottom plate 5120. Here, the size of the resonance hole 5100a can be adjusted according to the volume of the body 5100, the amplification amount of sound, and the like. For example, when the resonance hole 5100a is formed in the lower plate 5120, the resonance hole 5100a may be formed in an area of 10% to 80% of the area of the lower plate 5120. Here, as the area of the resonance hole 5100a is smaller, the frequency section to be amplified is narrowed and the frequency section in which the amplification hole 5100a is amplified becomes wider. For example, when the resonance hole 5100a is provided with the first area, the frequency of 1 kHz to 1.5 kHz can be amplified. When the resonance hole 5100a is provided with the second area larger than the first area, 2kHz frequency can be amplified. Also, as the area of the resonance hole 5100a increases, the sound pressure rises less. That is, when the resonance hole 5100a is provided with the second area larger than the first area, the sound pressure is relatively lower as compared with the case where the resonance hole 5100a is formed with the first area. Meanwhile, the body 5100 can be manufactured using a material that is hard and has excellent vibration transmission characteristics. However, if the body 5100 is too light, the body 5100 may be excessively sounded and thus the sound may not be clear, and if the body 5100 is too hard and heavy, an unnatural sound may be output. Therefore, the material of the body 5100 can be selected in consideration of the volume of the body 5100, and if it is the same volume, it is preferable to use a hard and heavy material. Such a body 5100 can be manufactured using, for example, wood, glued wood, pulp, paper, medium density fiberboard (MDF), metal, plastic or the like.

The vibration transmission portion 5200 may be provided in a predetermined area on the top plate 5110 of the body 5100. For example, the vibration transmitting portion 5200 may be provided in a central region of the top plate 5110 so that the electronic device 10 may be contacted. The vibration transmitting portion 5200 may be made of a material different from that of the body 5100 and transmits the vibration output from the electronic device 10 to the vibration space inside the body 5100. Of course, even if the vibration transmitting portion 5200 is not provided, the sound, that is, the vibration of the electronic device 10 can be transmitted to the inside of the body 5100. However, since the vibration transmitting portion 5200 is provided, . In addition, since the vibration transmitting portion 5200 is provided, the secondary noise can be reduced and the electronic apparatus 10 can be fixed. In order to realize such a characteristic, the vibration transmitting portion 5200 can be manufactured using, for example, elastic silicon or an ethylene-vinyl acetate copolymer (EVA). Therefore, the vibration of the electronic device 10 can be effectively transmitted to the body 5100 by increasing the adhesion of the electronic device 10, and the sliding can be reduced to enable stable mounting. The vibration transmitting portion 5200 may have a surface higher than the top plate 5110 of the body 5100. That is, the vibration transmitting portion 5200 may be provided on the surface of the top plate 5110 and protrude from the top plate 5110. Of course, the vibration transmitting portion 5200 may be formed by forming a groove having a predetermined depth in the top plate 5110 and buried in the groove.

The supporting portion 5300 may be provided in a predetermined area of the lower plate 5120, for example, near four corners of the lower plate 5120. That is, the support portion 5300 may be provided inside the region in contact with the side wall plate 5130. By providing the support portion 5300 in this manner, the lower plate 5120 can be prevented from contacting the ground. That is, a space is provided between the lower plate 5120 and the paper surface by the support part 5300 to allow air to flow smoothly through the resonance hole 5100a, and a secondary resonance space is provided between the lower plate 5120 and the paper surface . The support portion 5300 is manufactured using rubber, foam, or the like, so that the body 5100 can be prevented from shaking or slipping.

Meanwhile, the body 5100 of the acoustic amplification box 5000 can be manufactured by using at least the top plate 5110 using a material having appropriate elasticity. That is, the upper plate 5110 acts as a diaphragm that directly contacts the electronic device 10 and transmits the vibration of the electronic device 10, so that the upper plate 5110 can be manufactured using a material having appropriate elasticity. A high Young's modulus is required to obtain a high output by changing the material of the top plate 5110, but a low elastic modulus is required to produce a flat frequency characteristic. In order to realize high sound pressure and high quality sound quality, the elastic force of the top plate 5110 is applied to the vibration source, that is, the electronic device (for example, 10). Also, the mass of the top plate 5110 is advantageously light so as to smooth the vibration. However, as the mass of the top plate 5110 decreases, the resonance frequency increases and the sound quality decreases. Therefore, the combination of the top plate 5110 having the best combination of the efficiency of the speaker and the resonance frequency can be adjusted by adjusting the inelasticity (= elasticity / Should be. The sound amplification box is in contact with the electronic device 10 having the contact type speaker to amplify the sound, so that the top plate 5110 must be exposed at least a certain area in the direction of at least one side of the electronic device 10. That is, the size of the top plate 5110 should be larger than that of the electronic device 10. In order to satisfy such a condition, at least the top plate 5110 can use a sandwich plate, for example, a polymer material having a density of 10.0 to 20.0 kg / m 2 and an elastic modulus of 2500 to 3500 x 10 ⁶ N / And a sandwich type in which pulp having a density of 100 to 300 kg / m < 2 > and an elastic modulus of 100 to 200 x 10 < ⁶ > N / m < 2 > is adhered to both surfaces can be used to improve impedance matching characteristics with air. For example, the top plate 5110 can be manufactured using a plate having white snow adhered to both sides of polystyrene. Of course, not only the top plate 5110 but also the bottom plate 120 and the plurality of side wall plates 5130 can use a sandwich plate.

FIG. 21 is a graph comparing a frequency characteristic (A) using an acoustic amplification box according to the present invention and a frequency characteristic (B) of a dynamic speaker, and Table 1 shows this table.

Fo (kHz)
Resonance frequency Sound pressure (dB) 0.5 kHz
(Low-frequency part) 0.8 to 1.5 kHz
(Average sound pressure) 3 kHz 0.3-20 kHz
(Average sound pressure) Sandwich type (A) 0.63 96.0 93.3 99.5 95.3 Dynamic (B) 1.00 79.0 93.2 88.1 87.1

As described above, the resonance frequency can be lower than that of the dynamic speaker by using the acoustic amplification box manufactured using the sandwich plate, and the frequency characteristic is improved over the dynamic speaker in all frequency bands.

Although the technical idea of the present invention has been specifically described according to the above embodiments, it should be noted that the above embodiments are for explanation purposes only and not for the purpose of limitation. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

100: piezoelectric element 200: first sheet
300: second sheet 110: vibration transmitting plate

Claims (27)

A piezoelectric element;
A WPC antenna provided on one surface of the piezoelectric element and connected with two antenna patterns spaced apart from each other in a vertical direction; And
And an NFC antenna provided outside the WPC antenna.
The composite device according to claim 1, further comprising a vibration transducer which is in contact with at least one area of the laminate in which the piezoelectric element, the WPC antenna and the NFC antenna are laminated, and is disposed apart from one surface of the laminate.
The WPC antenna according to claim 1 or 2, wherein the WPC antenna comprises: a first WPC antenna pattern formed on a first sheet provided on one surface of the piezoelectric element; a second WPC antenna formed on a second sheet provided on the first sheet; A composite device comprising a pattern.
[4] The apparatus of claim 3, further comprising: a first connection hole formed on the second sheet and connecting the first and second WPC antennas; and a second connection hole formed on the first sheet and connected to the first WPC antenna, And a first fetch pattern.
5. The composite device of claim 4, wherein the NFC antenna is formed on the second sheet outside the second WPC antenna, and at least a portion of the NFC antenna is cut off.
[6] The apparatus of claim 5, further comprising at least one connection pattern formed on the first sheet, at least one second connection hole formed on the second sheet and connecting the NFC antenna and the connection pattern, And a second extraction pattern connected to the NFC antenna and drawn out to the outside.
The composite element according to claim 6, wherein the first sheet is a magnetic sheet and the second sheet is a non-magnetic sheet.
The composite device according to claim 7, wherein the piezoelectric element, the first and second sheets are simultaneously sintered.
The composite device according to claim 6, wherein the first and second sheets are made of a polymer.
The composite device according to claim 9, further comprising: a cover sheet provided on the second sheet; and a magnetic sheet provided so as to be apart from the other surface of the piezoelectric element.
11. The composite device according to claim 10, further comprising: a frame holding an edge of the laminate including the first and second sheets; and a cover provided on at least one side of the frame.
A body connectable and detachable to the rear of the electronic device; And
And a composite device module coupled to a predetermined region of the body,
The composite device module includes a piezoelectric speaker, a WPC antenna, and an NFC antenna.
[Claim 12] The composite device module of claim 12,
A piezoelectric element;
A WPC antenna provided on one surface of the piezoelectric element and connected with two antenna patterns spaced apart from each other in the vertical direction; And
And an NFC antenna provided outside the WPC antenna.
14. The composite device according to claim 13, further comprising a vibration transmitting member which is in contact with at least one region of the laminate in which the piezoelectric element, the WPC antenna, and the NFC antenna are laminated and is disposed apart from one surface of the laminate.
The WPC antenna according to claim 13 or 14,
A first WPC antenna pattern formed on a first sheet provided on one surface of the piezoelectric element,
A second WPC antenna pattern formed on a second sheet provided on the first sheet,
A first connection hole formed on the second sheet and connecting the first and second WPC antennas,
And a first drawing pattern formed on the first sheet and connected to the first WPC antenna and drawn out to the outside. 16. The antenna of claim 15, wherein the NFC antenna comprises: an NFC antenna pattern formed on the second sheet outside the second WPC antenna,
At least one connection pattern formed on the first sheet,
At least one second connection hole formed on the second sheet and connecting the NFC antenna and the connection pattern,
And a second drawing pattern formed on the first sheet and connected to the NFC antenna and drawn out to the outside.
17. The composite element according to claim 16, wherein the first sheet is a magnetic sheet, the second sheet is a non-magnetic sheet, and the piezoelectric element, the first sheet and the second sheet are simultaneously sintered.
17. The composite device according to claim 16, wherein the first and second sheets are made of a polymer, and further comprising a cover sheet provided on the second sheet and a magnetic sheet provided apart from the other surface of the piezoelectric element.
The composite device according to claim 13 or 14, wherein the body has the same shape as the rear cover of the electronic device, and the rear cover of the electronic device is detached and then fastened.
The composite device according to claim 19, wherein an opening is formed in a predetermined region of the body, and the composite device module is inserted into the opening and fastened.
The composite device according to claim 19, wherein a predetermined region of the body protrudes outwardly, and a housing space is provided inside the housing, and the composite device module is inserted into the accommodation space and fastened.
[19] The apparatus of claim 19, wherein the composite device module comprises: a first connection terminal having one side connected to the piezoelectric element and the other side exposed to the outside and connected to the audio output terminal on the back side of the electronic device; And the other side is exposed to the outside and connected to the WPC terminal and the NFC terminal on the back side of the electronic device.
The composite device according to claim 19, further comprising a flip cover provided on one side of the body and covering a front surface of the electronic device.
An electronic device having a composite device module coupled to a rear surface thereof,
A body coupled to and detachable from a rear surface of the electronic device; And
And a composite device module coupled to a predetermined region of the body,
The composite device module includes a piezoelectric speaker, a WPC antenna, and an NFC antenna.
27. The composite device module according to claim 24,
A piezoelectric element;
A WPC antenna provided on one surface of the piezoelectric element and connected with two antennas spaced apart from each other in a vertical direction;
An NFC antenna provided outside the WPC antenna; And
And a vibration transmitting member which is brought into contact with at least one area of the laminate in which the piezoelectric element, the WPC antenna, and the NFC antenna are laminated, and is separated from one surface of the laminate.
26. The electronic apparatus according to claim 25, wherein the vibration transmitting member is provided so as to be spaced apart or closer to the piezoelectric element from the edge to the center, or to maintain the same interval.
27. The electronic device according to claim 26, wherein the composite device module is configured such that the vibration transducer is brought into contact with a vibration amplified object and the negative pressure and the output from the piezoelectric speaker are amplified.

Images