KR20080095962A

KR20080095962A - Electronic sound-transforming unit having structure of generating bass reflex with same phase for preventing distortion

Info

Publication number: KR20080095962A
Application number: KR1020070040670A
Authority: KR
Inventors: 유수진; 유수호
Original assignee: 유수진; 유수호
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2008-10-30

Abstract

An electronic sound-transforming unit with a structure of generating in-phase bass reflex for preventing distortion is provided to improve a bass by reflexing the bass of a second vibration unit as in-phase with a sound of a first vibration unit without offsetting the bass of the second vibration unit. A protector includes a first outlet with an open center. A first vibration unit(120) includes a first vibration plate block-integrated with an edge and a voice coil(123) formed in a lower side of the first vibration plate. The first vibration unit is positioned in a lower side of the protector. A magnetic circuit includes a magnet(143) inside the voice coil and a yoke(144) covering the voice coil to function as a vibration plate. A second vibration unit(140) includes the magnetic circuit and a second edge. An electrode pattern is printed on both sides of a terminal plate(150). The terminal plate is separated from the lower side of the second vibration unit with a predetermined interval and is coupled to a lower side of a frame(130). A damper(190) is positioned at the lower side of the first vibration unit and the upper side of the second vibration unit to have a ring shape and includes a braking guide to cover a part of the first and second edges.

Description

ELECTRONIC SOUND-TRANSFORMING UNIT HAVING STRUCTURE OF GENERATING BASS REFLEX WITH SAME PHASE FOR PREVENTING DISTORTION}

1 is a cross-sectional view of a vibration function speaker for the prior art 1.

Figure 2 is a graph showing the speaker output characteristics for the prior art 1.

Figure 3 is a cross-sectional view of a two-way speaker for the prior art 2.

Figure 4 is a graph showing the speaker output characteristics for the prior art 2.

5 is a partial cutaway perspective and sectional view of the overall configuration of the unit according to the invention.

6 is a partial cutaway perspective view and cross-sectional view of a protector according to the present invention.

7 is a partial cutaway perspective view and a cross-sectional view of the first vibration unit according to the present invention.

8A is a partial cutaway perspective and cross-sectional view of the frame according to the present invention.

Figure 8b is a perspective view showing a modified structure of the frame according to the present invention.

8C shows a plan view, a cross sectional view and a partial absolute cross sectional view of a deformation structure of the frame according to FIG. 8B;

Figure 8d is a comparison of the presence or absence of the adhesive guide of the frame according to Figure 8b.

9 is a partial cutaway perspective view and a cross-sectional view of the second vibration unit according to the present invention.

Figure 10a is a plan view and a sectional view showing a damper structure according to the present invention.

10B is an exploded perspective view illustrating a structure in which a damper is mounted on the first vibration unit and the voice coil according to the present invention.

Figure 10c is a cross-sectional view and a plan view showing a damper structure mounted to the first vibration unit according to the present invention.

Figure 10d is an exploded perspective view showing a structure in which the damper is mounted to the second vibrating portion and the yoke according to the present invention.

Figure 10e is a plan view, sectional view and rear view showing a damper structure mounted to the second vibration unit according to the present invention.

Figure 10f is an exploded perspective view showing the overall structure of the damper is mounted to the unit according to the present invention.

Is a partial cutaway perspective and sectional view of a terminal plate according to the present invention;

Figure 11b is a plan view and a rear view showing a specific structure of the terminal plate according to the present invention.

Figure 11c is a comparison of the presence or absence of the terminal plate according to the present invention.

12 is a cross-sectional view showing the structure of a resonance housing according to the present invention.

Figure 13 is an exemplary view showing a state in which the resonance housing containing the unit according to the invention mounted on the earphone.

14 is a partial cross-sectional perspective view and a cross-sectional view showing an emission path of air or sound inside the unit according to the present invention.

Fig. 15 is a sectional view showing another embodiment of the unit according to the present invention.

16 is a graph showing the sound output characteristics of a unit according to the invention.

Figure 17 is a graph illustrating a comparison of the sound output characteristics of the unit according to the present invention and the prior art 1,2.

Explanation of symbols on the main parts of the drawings

100 unit 150 according to the invention terminal plate

110: protector 151: electrode pattern

120: first vibration portion 151a: anode electrode pattern

121: first vibration plate 151b: cathode electrical pattern

122: first edge 161: first air chamber

123: voice coil 162: second air chamber

130: frame 163: third air chamber

132: coil lead out guide 171: first discharge port

133: bonding guide 172: second discharge port

140: second vibration portion 173: third discharge port

142: plate 181: yoke vent

143: magnet 183: third edge

144: York 190: damper

146: York guide 195: braking guide

147: second edge 200: resonance housing

148: second gasket 203: through hole

204: resonance space

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bass reflex speaker, that is, an improved electroacoustic conversion unit having an output structure of the in-phase bass reversal method, but having an anti-distortion function. Independent phase output / spinning, in which the inverted bass direction is further dependent on the main diaphragm for mid / high pitch reproduction without depending on the housing or cabinet box, as well as structural stability and distortion prevention A loudspeaker unit for wideband reproduction (especially bass) that guarantees stability of sound quality through functions.

When the conventional speaker technology is classified into large items, it can be classified into a single unit technology and a system technology in which the unit is mounted.

In the single unit technology, there are five structural theories such as electro dynamic, electro magnetic, electro capacity, reverse piezo, and ion. Are distinguished.

The largest and the most widely used of the unit technologies are electret dynamic technology, which is based on a reverse piezo theory, a super directional unit utilizing ultrasonic Doppler effect and a film-type unit surface-modified on a fluorinated film. It has been actively developed since the year.

Notable prior arts include the vibration function speaker of FIG. 1 and the 2-way speaker of FIG. 2 based on the electrodynamic theory.

1 is a cross-sectional view showing the structure of a dynamic vibration, acoustic composite mode micro speaker according to the prior art 1.

The conventional dynamic vibration, acoustic composite mode micro speaker includes a cylindrical frame 1 and a magnetic circuit portion and a sound generating portion mounted therein. Here, the yoke of the magnetic circuit part is fixed to the leaf spring 2, and the leaf spring 2 is fixed to the frame 1, whereby vibration is generated. Let's look at this more specifically.

The upper cover 3 is coupled to the upper side of the frame 1, the lower cover 4 is coupled to the lower side, the acoustic cover 5 is provided at the upper cover, and the rear vent hole is provided at the lower cover 4. 6) is provided. The sound generating unit includes the first and second vibration units 8 and 9 and the voice coil, and the voice coil receives power by connecting the voice coil lead wire to the PCB electrode terminal. The magnetic circuit portion is composed of a circular plate, a permanent magnet, and a circular yoke, and the magnetic circuit portion acts as a mass of vibration to generate vibration.

The first vibrator 8 is composed of a diaphragm, and the second vibrator 9 is configured as a magnetic circuit. The first vibrator 8 has only a wide range of sound expression possible, and the second vibrator 9 has a constant frequency. Is intended only for vibrational expression. In order to express vibration only, the air gap 7 is formed in the suspension of the second vibration unit 9 so that the sound generated is extinguished.

This prior art is disclosed in Korean Patent Application Publication No. 2000-12495 as an external compound mode micro speaker.

The vibration force generation of the AC-driven dynamic acoustic / vibration combined mode micro-speaker is defined by the lead wire of the voice coil inserted at right angles in the air gap of the magnetic circuit or in the air chamber (the space between the inside of the yoke and the outside of the plate). When a negative electrical signal is induced, an alternating rotating magnetic field corresponding to the positive or opposite direction and a directing magnetic field generated from a permanent magnet react with each other and are attracted or repelled.

At this time, the direction of force generated is determined by the direction of the direct current magnetic flux from the inside of the magnetic circuit air gap to the outside and the direction of the alternating rotation magnetic flux generated in the coil, and acts in the up or down direction based on the cross section of the air gap. Done. At this time, AC electric energy of full duty wave must be applied to the coil in order to repeat up and down in sequence. The magnitude of the generated force is proportional to the magnetic flux density in the air gap, the length of the coil and the magnitude of the current flowing through the coil. In addition, when the reaction angle between the magnetic field generated in the coil and the magnetic field present in the air gap is at right angles, it interacts with the greatest force, and the applied unit is Newton.

The above is a quote from Framing's left-handed rule, which is well known for the interaction of two magnetic fields.

In the conventional vibrating body, the resonant frequency is determined by the correlation between the weight of the entire vibrating part and the rigidity based on the elasticity of the support, and the vibration width is the largest in the resonant part. In addition, the smaller the stiffness of the leaf spring, the braking support, the lower the resonant frequency. It is noted that the magnetic circuit structure has a much larger mass than the diaphragm structure. As a result, when a relatively large magnetic circuit structure is used as the vibration source, it is possible to generate a vibration frequency in a low region that the human body can feel well.

The vibration / acoustic composite mode micro speaker according to the prior art 1 has a theoretical background based on the above-mentioned principle, which is a vibration mode at the maximum resonance point frequency of the magnetic circuit structure, and the frequency from the resonance point frequency of the light diaphragm structure to the maximum audible region. Used in speaker mode to reproduce sound.

In the case of the AC type dynamic vibration / acoustic composite mode micro speaker, by integrating separate components that provide two functional elements into one, a cost reduction effect can be obtained by reducing the number of components included in the mobile phone set. Since it is an AC method, there is an advantage that it is possible to secure the added value of adding various types of vibration functions according to the frequency of the driving signal source.

However, considering the acoustical aspect of the prior art 1 according to Figure 1, because the magnetic circuit portion and the sound generating portion is driven in reverse at the same time to move because the magnetic circuit portion is fixed, the regeneration efficiency is inevitably lowered. In addition, since the suspension of the second vibration unit 9 is a breathable structure, there is a disadvantage in that the bass is canceled and thus it cannot have an excellent bass generating effect.

Figure 2 is a graph showing the state of the synthetic sound characteristics for the prior art 1.

Referring to FIG. 2, it can be seen that the acoustic energy is lowered because the prior art 1 is basically based on reverse phase vibration, and the second vibrator 9 has independent acoustic characteristics due to vibration and the bass within itself cancels out. It can be seen that there is a disadvantage in that the renewable energy is extremely small.

3 is a cross-sectional view illustrating a structure of a 2-way speaker according to the related art 2. FIG.

Referring to the configuration of FIG. 3 schematically, a protector 31 having a first discharge port 29 formed of a plurality of holes in the speaker unit 21 mounted inside the housing 20 is bent and formed at a lower portion thereof. It is provided to have the first air chamber 26 between the first vibration plate 24 and two voice coils 22 and 23 are disposed under the first vibration plate 24. These voice coils 22, The lower part of 23 is provided with the 2nd diaphragm 25 which is also bend | molding. The second air chamber 27 is provided between the voice coils 22 and 23 and the second vibration plate 25.

The bottom surface of the speaker unit 21 having a through hole is positioned below the second vibration plate 25, and a third air chamber 28 is disposed between the bottom surface of the speaker unit 21 and the inner wall of the housing 20. The third discharge port 31 is formed at one side of the third air chamber 28, that is, at the portion of the outer housing 20.

As can be seen from this configuration, it can be seen that the first vibrating plate 24 reproduces only a high frequency of at least 5 KHz due to the sealed structure, and the generated sound of the second diaphragm 25 is the second and third discharge ports 30. And 31), the result is that the bass is completely canceled and only mid-to-high pitch reproduction above a certain band is possible.

Furthermore, when the first and second vibrating plates 24 and 25 simultaneously operate, the direction of the sound emitted from the first to third discharge ports 29, 30 and 31 is inversely phased. There is a problem that it is difficult to reproduce sound in the low range.

In addition, when one of the second and third discharge ports 30 and 31 is closed to prevent the bass sound from being canceled due to the reverse phase, the second diaphragm 25 is also sealed like the first diaphragm 24, and thus it is impossible to reproduce the bass. There is a disadvantage of losing.

4 is a graph showing the sound acoustic characteristics of the prior art 2 according to FIG.

As can be seen from Fig. 4, the acoustic energy of the second diaphragm (vibrator) 25 is synthesized in the reversed phase at the second and third discharge ports 30 and 31, so that the acoustic energy near the bass resonance frequency is reduced. It can be seen that it disappears rapidly, which shows that there is a problem in sound generation related to bass.

When summarizing the problem of the bass region, which can be called a major disadvantage of the prior art 2 according to FIGS. 3 and 4, the phase of the front and rear sides of the unit is -180 in the case of a single unit. This is due to the fact that it becomes impossible to hear because it is canceled.

In order to prevent the bass offset phenomenon, a plate-shaped structure for blocking the front and rear surfaces of the unit is called a baffle. The baffle is ideally infinitely expandable but practically impossible, thus forming a space similar to the infinite baffle. It is the cabinet that houses the unit.

This is a key part of the system's technology, which can be subdivided into a hermetic enclosure where the space behind the unit is completely isolated from the outside and a base reflex that connects a portion of the cabinet to the exterior space.

The ideal setting of a closed cabinet space is to be able to realize a low resonant frequency equivalent to the low resonant frequency of a unit in a free space, in order to extend the limit of the low range that can be expressed even when mounted in a cabinet. to be.

At present, as the size of a speaker having a sound generating device such as a portable terminal for information communication is miniaturized, the external propensity of a speaker required in practical surroundings is small, so that even a speaker can be required as little as possible if equal bass can be realized. Speakers are also being developed and marketed as small as possible, and new structures are continuously being developed that can produce lower frequencies with lower frequencies.

Among the cabinet technologies described above, the bass reflex technology, which is capable of miniaturization and moderately low bass extension, is divided into the classic representative technologies of the front load type and the back load type.

Bass reflex technology means that a certain amount of sound emitting space is formed in a part of a closed cabinet, and the air is radiated to the rear of the speaker unit by using a resonance frequency related to the size and thickness of the space and the outlet of the cabinet. It is a technology that expresses even lower bass.

In other words, in order to realize a more maximized bass reproduction in the same unit, a separate cabinet, which is essentially an extended space of infinite baffles, is necessary, but it is possible to reinforce the bass region according to the deformation and development of such a cabinet. There is a need for speaker technology with a new structure, and furthermore, there is a need for a new technology capable of achieving an excellent reinforcement structure in the bass region without a cabinet structure.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems of the prior art, and provides a novel structure that enables the bass reflex cabinet function only by the unit itself, so that the bass reflex is possible as the unit itself without a separate external cabinet. The purpose is to provide.

Another object of the present invention is to provide a base copper phase reflex unit in which two separate resonance points can be formed as one coil, and in particular, the phase of the vibration portion having a low resonance point that can be enlarged is in-phase reversed to the front of the unit.

Another object of the present invention is to provide a means for acting as a linear guide of the sound progress in the process of expressing the sound through the vibration of the air in the vibrator to prevent the generation of distortion by the irregular vibration.

It is a further object of the present invention to provide a separate case and to provide a resonant space therein to achieve a more thrilling bass expression.

A further object of the present invention is to induce the convenience of assembling earphones by inducing an electrode pattern having electrical contact with a cable in a contact manner rather than a soldering manner.

In order to achieve the above object, the electroacoustic conversion unit having an output structure of the in-phase bass reversal system having a distortion prevention performance according to the present invention, the protector 110 having a first discharge port 171 formed in the center portion is open; ); A lower portion of the protector 110 including a first diaphragm 121 having at least one convex first edge 122 and a voice coil 123 formed at a lower side of the first vibrating plate 121. A first vibrator 120 disposed on the; Magnetic circuit portion 141 having a magnet 143 positioned inside the voice coil 123 and the voice coil 123 and having a yoke 144 serving as a diaphragm, and having a portion recessed downward. A second vibrator 140 having a second edge 147; An electrode pattern 151 printed on both sides and spaced apart from the bottom of the second vibrator 140 to be coupled to the bottom surface of the flame 130; A braking guide positioned to have a ring shape at a lower portion of the first vibrator 120 and an upper portion of the second vibrator 140, and configured to cover portions of the first and second edges 122 and 147. The damper 190 having a 195; A plurality of second discharge port 172 is formed around the inner wall of the frame 130 in the vertical direction toward the upper surface, The sound generated by the vibration of the yoke 144 is inverted through the second discharge port 172 by the terminal plate 150 and synthesized in the same phase as the sound generated by the first vibration unit 120. And then output to the first discharge port 171.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numerals in each of the drawings refer to like elements.

5 is a partially exploded perspective view and an assembled sectional view of the unit 100 according to the present invention.

As can be seen from Figure 5, the unit 100 according to the present invention is preferably described on the basis of the assembly order from the top to the bottom based on the configuration located inside the frame 130 consisting of a cylindrical shape Consists of the protector 110, the first vibrating unit 120, the second vibrating unit 140, and the terminal plate 150 forming the lowermost layer. Each of these components will be described with reference to the accompanying detailed drawings.

6 is a partial cutaway perspective view and cross-sectional view of the protector 110 according to the present invention.

Referring to FIG. 6, the protector 110 according to the present invention forms the uppermost part of the unit 100 and provides a basic function of protecting the first and second vibration parts 120 and 140 located therein from external shocks. Composed along the top wall of the frame 130 is made of the same shape as. In the central portion of the protector 110 is formed a first discharge port 171 having an open structure. The first discharge port 171 basically serves as a vent to allow the sound to be emitted to the outside.

In addition, the protector 110 is open to the upper end of the frame 130, the plurality of second discharge port 172 is formed in the first and second vibration unit (120, 140) to be described later does not directly contact the outside The first discharge port 171 serves to cause a certain convergence.

7 is a partial cutaway perspective view and a cross-sectional view showing the configuration of the first vibration unit 120 according to the present invention.

The first vibrator 120 according to the present invention is structurally positioned at a predetermined distance below the protector 110, and has a shape corresponding to the shape of the frame 130 to the protector 110, preferably a cylindrical plate shape. The first vibrating plate 121 extends in the transverse direction, including at least one convex portion, such as embossing, and extends into the first gasket 124 formed along the outer circumferential surface thereof. This is referred to as edge 122.

The voice coil 123 is seated at the lower end of the first vibration plate 121 at substantially the center portion, and one wire 125 of the wires constituting the voice coil 123 extends outside the first gasket 124. . The voice coil 123 has a cylindrical hollow structure, and the magnet 143 of the second vibration unit 140 to be described below is positioned below the hollow portion.

8A is a partial cutaway perspective view and a cross-sectional view showing a configuration of the frame 130 according to the present invention.

As can be seen from Figure 8a, the frame 130 serves as a basic housing or sound emission medium of the unit 100 according to the present invention basically has a cylindrical shape, the upper surface of the protector 110 is The fitting is coupled and the lower terminal plate 150 is coupled. The inner side of the frame 130 has a hollow structure so that the same configuration as the first and second vibrating parts 120 and 140 may be located. In the inner circumferential surface portion of the frame 130, a plurality of second outlets 172 are preferably arranged along the inner circumference of the frame 130 in the vertical direction, that is, parallel to the longitudinal direction of the frame 130, up to the upper surface. It is formed radially. Specifically, the second discharge port 172 is located between the inner wall of the frame 130 and the outer side of the second gasket 148 of the second vibration unit 140 to be described later.

In the outer wall of the frame 130, a plurality of third discharge ports 173 penetrated in the lateral direction until the third air chamber 163 to be described later is formed radially around the outer wall of the frame 130. In one side of the outer wall is formed crack (crack) in the longitudinal direction formed by the crack is formed by the coil lead-out groove 131 to allow the wire of the voice coil 123 to be drawn in and out.

In the unit 100 according to the present invention having such a structure, a space occurs on the lower surface of the protector 110 and the upper surface of the first vibrator 120, which is referred to as a first air chamber 161. 2 The space between the lower surface of the vibration unit 140 and the upper surface of the terminal plate 150 is called the second air chamber 162, and the first vibration unit 120, specifically, the lower portion of the first edge 122 The space between the surface and the second vibrator 140, specifically, the upper surface of the second edge 147 is called a third air chamber 163.

As can be seen from the above configuration and the accompanying drawings, the protector 110, which basically constitutes the upper structure of the unit 100 according to the present invention, is opened by the first outlet 171 and forms a lower structure of the terminal plate. 150 is sealed.

FIG. 8B is a perspective view showing a modified structure of the frame 130 according to the present invention, and FIG. 8C is a plan view, a sectional view, and a partial absolute sectional view showing the structure of the frame 130 according to FIG. 8B.

The structure of the frame 130 according to FIGS. 8B and C is an improved structure of the frame according to FIG. 8A described above, so that the wire 125 of the voice coil 123 may be mounted more stably in the coil lead-out groove 131. It can be seen that the coil lead guide 132 and the adhesive guide 133 for stably fixing the first and second vibrating parts 120 and 140 in the frame 130 are further configured.

The coil drawing guide 132 is formed in the same direction as the traveling direction of the coil drawing groove 131 in the coil drawing groove 131, that is, in the longitudinal direction, and is vertically formed based on the center line of the coil drawing groove 131. It has a protruding extended structure. The coil lead guide 132 serves to provide a convenient and stable structure in which the wire 125 of the voice coil 123 may be divided into an anode and a cathode.

In addition, the inner circumferential surface of the frame 130 has a stepped structure for stably accommodating the first and second vibrating parts 120 and 140. Specifically, the upper and lower parts of the frame 130 protrude inward to have a larger diameter than the central part. Due to this protrusion stepped occurs and has a structure capable of accommodating the first and second vibrating portion (120, 140) in the upper and lower lateral surface of the step.

In particular, an additional step is formed at the bottom to provide a space in which the terminal plate 150 can be accommodated. At this time, the surface generated in the upper portion by the stepped portion is referred to as the first vibrating portion attaching surface 134, and the portion where the upper surface of the second vibrating portion 140 is attached at the lower portion is attached to the second vibrating portion attaching surface 135 and the lower end. The plane generated by the stepped portion is called the terminal plate attachment surface 136.

An adhesive guide 133 is separately attached to the first and second vibrating parts attaching surfaces 134 and 135 and an inner wall of the frame 130 around the first and second vibrating parts.

The adhesive guide 133 is a pad-like structure in which an adhesive is uniformly applied to a surface portion. When the first and second vibration parts 120 and 140 are seated on the first and second vibration part attachment surfaces 134 and 135, the frame 130 The first and second vibrating parts 120 and 140 may be stably fixed to the inside without moving or unnecessary movement.

FIG. 8D is a comparison diagram of the presence or absence of the adhesive guide 133 of the frame 130 according to FIG. 8B.

As can be seen from FIG. 8D, if the adhesive guide 133 is not formed at the first and second vibrating parts attaching surfaces 134 and 135 and the inner wall portion of the peripheral frame thereof, the adhesive is simply applied to the inner peripheral surface of the frame 130 directly. When applied, the surface tension may not be uniform and the thickness may be uneven. In this case, the residual adhesive may be formed on the first and second edges of the first and second vibration parts 120 and 140 at the thick adhesive application site. There is a risk of being penetrated and settled as an element that hinders the smooth vibration function of the first and second edges.

Therefore, in order to prevent such a problem, by forming a separate pad, that is, the adhesive guide 133 is uniformly applied to the first and second vibrating surfaces 134, 135 and the inner wall of the frame 130 around it. The first and second vibrating parts 120 and 140 may be stably provided in the frame 130 without leaking the adhesive. In addition, the first and second vibrating parts fall in the direction of gravity due to the weight of the voice coil and the magnet, so that the overall stability may be reduced by improving the bearing capacity by the adhesive guide 133. Is also provided.

9 is a partial cutaway perspective view and a cross-sectional view showing the configuration of the second vibration unit 140 according to the present invention.

The second vibrator 140 according to the present invention includes a magnetic circuit part 141 which largely constitutes a source of magnetic field generation, and a supporter 145 supporting the magnetic circuit part 141 along the outer circumferential surface of the magnetic circuit part 141.

First, the magnetic circuit unit 141 will be described. The magnet 143 formed at the center portion is seated inside the hollow portion of the voice coil 123 and the upper surface of the magnet 143 is provided for preventing the position of the magnet and preventing movement. The yoke (Yoke) surrounding the magnet and the voice coil 123 in a U shape with a plate 142 formed and spaced apart at regular intervals along the outer circumferential surfaces of the magnet 143 and the voice coil 123 as the outer shell of the magnet 143. 144 is provided.

The supporter 145 extends in the lateral direction including a yoke guide 146 for seating and supporting the yoke 114 and a portion recessed downward to the outside of the yoke guide 146 by surrounding the outside of the yoke 144. A second gasket 148 is formed, and the downward depression portion in the second gasket 148 is referred to as a second edge 147.

FIG. 10A is a plan view and a cross-sectional view showing the structure of the damper 190 according to the present invention, and FIG. 10F is an exploded perspective view showing the structure in which the damper 190 is mounted to the unit 100 according to the present invention.

Damper 190 according to the present invention is made of a flexible metal or plastic material, having a ring shape in the configuration mounted on the lower side of the first vibration unit 120 and the upper side of the second vibration unit 140, a plurality of inside The dog's holes are formed with certain rules.

10B is an exploded perspective view illustrating a structure in which the damper 190 is mounted on the first vibrator 120 according to the present invention, and FIG. 10C illustrates a damper structure mounted on the first vibrator 120 according to the present invention. It is sectional drawing and top view shown.

10D is an exploded perspective view illustrating a structure in which the damper 190 is mounted on the second vibrator 140 according to the present invention, and FIG. 10E is a damper mounted on the second vibrator 140 according to the present invention. It is a top view, sectional drawing, and a rear view which show a structure.

As it can be seen with reference to Figure 10b to 10e, the damper 190 according to the present invention is to be seated on the lower surface of the first vibrating portion 120 and the upper surface of the second vibrating portion 140, the cross section is a planar structure The edge first attachment part 191, the edge second attachment part 192, and the frame attachment part 193, which are formed in the center and have a through hole formed therein and are connected to a predetermined size along the periphery of the hole. , The center attachment portion 194 and the braking guide 195 are divided.

Specifically, the edge first attachment portion 191 means a portion attached to the inner circumferential surface of the first or second edge 122, 147, and the edge second attachment portion 192 is the first or second edge 122, 147. Is attached to the outer circumferential surface of the frame attachment portion 193 is located on the outermost circumference to be attached to the inner wall of the frame 130, the central attachment portion 194 is formed around the central through hole The surface of the yoke 144 to voice coil 122 is attached.

In particular, a braking guide 195 is formed in a space between the edge first attaching portion 191 and the edge second attaching portion 192, and the braking guide 195 is formed below the first edge 122 or the second. Positioning parallel to the upper portion to cover a portion of the edge 147 serves to significantly reduce the distortion rate during the vibration of the sound at the first and second edges (122,147).

Specifically, when the air is vibrated by the first and second edges 122 and 147 in the first and second vibrators 120 and 140, the air flows in a straight line due to the convex structure of the first and second edges 122 and 147. Since the contact density of the air contacting the surfaces of the first and second edges 122 and 147 is not constant, it may cause unbalanced vibration, which may cause distortion of sound, that is, distortion.

As a result, the braking guide 195 is configured to solve this distortion problem, and as shown in the figure, three are symmetrically configured between the edge first attachment portion 191 and the edge second attachment portion 192. It is desirable to have a configuration such as a physical partition on the upper or lower portions of the first and second edges 122 and 147 to allow the flow of air to flow more stably through the partition and to linearize the air flow and vibration energy. To help.

The damper 190 was an element that already exists in a high-performance speaker, but the mounting space does not occur properly in a small unit structure such as earphones, and it has not been used for the reason that the sound quality does not increase by simply installing only the damper. According to the rational structure of the unit 100 according to the present invention, such a braking guide 195 can be attached stably. Accordingly, the braking guide 195 may provide characteristics capable of reducing distortion and pursuing uniform sound expression.

In addition, in the damper 190 attached below the first edge 122, the wire 125 of the voice coil 123 may be guided through one of the three braking guides 195, thereby providing a clean and stable structure of the voice coil wire. It serves to provide a mounting space, the wire 125 of the voice coil is guided in the braking guide 195, so that the problem of being easily damaged such as the wire 125 being cut by external force can be solved.

Figure 11a is a partially cutaway perspective view and a cross-sectional view showing the configuration of the terminal plate 150 according to the present invention, Figure 11b is a plan view and a rear view showing a specific structure of the terminal plate 150 according to the present invention, Figure 11c A comparison diagram of the presence or absence of the terminal plate 150 according to the present invention.

The terminal plate 150 is a portion corresponding to the bottom surface of the unit 100, and one side of the terminal plate 150 is printed with an electrode pattern 151 forming an electrical connection with the wire 125 of the voice coil.

As can be seen with reference to Figure 11c, the terminal plate 150 according to the present invention is an essential component for the in-phase inversion of the bass, which is a key role of the present invention, the second vibration unit 140 for bass expression It serves to guide the upward direction by reflecting the vibration toward the bottom of the).

Referring to FIG. 11B, the electrode pattern 151 according to the present invention forms the anode electrode pattern 151a at the center of the terminal plate 150, and forms the cathode connection pattern 151b to the outside at a predetermined distance. In addition, the negative electrode pattern 151b is provided with the voice coil negative electrode junction 153 connected to the outside to guarantee the same pole connection, and in the case of the positive electrode, the voice coil positive electrode junction 152 is formed on the back of the terminal plate 150. Although separated from 151a, the terminal plate 150 is not only connected to each other in the plane (upper surface) but also has a method of ensuring the same pole connection through the through hole 154.

That is, the configuration of the electrode pattern 151 is different from the known method of simply connecting the voice coil wire 125 directly with an external cable by soldering. By forming a contact type 'electrode pattern', the connection terminal or the wire of the earphone cable is provided so as to be in contact with it.

In other words, in the conventional soldering method, when the wire (voice coil or cable) is cut, it is difficult to repair it unless a welding machine is provided. The electrode pattern according to the present invention has a positive electrode and a negative electrode at one side (the back side of the terminal plate). The convenience of the cable / wire connection is provided by the contact method of contacting external terminals at a distance, and there is no fear of disconnection of the cable. It provides the property to manufacture in more various ways, such as rotary.

12 is a cross-sectional view showing a specific configuration of the resonance housing 200 according to the present invention.

The unit 100 according to the present invention may be made of a self-contained structure itself, but in order to further envelop the frame 130 according to the present invention for more excellent low tone expression, that is, the resonance housing 200 accommodating the frame 130. ) May be further provided.

Resonance housing 200 according to the present invention is formed in the form of a cylindrical case that may include a frame 130 therein, may be provided with a coupling portion (not shown) to be coupled to the other components of the earphone in the upper and lower parts. .

In addition, when a plurality of through holes 203 are formed radially along the outer circumferential surface of the resonance housing 200, and the frame 130 is accommodated therein, the outer circumferential surface of the frame 130 and the resonance housing 200 are provided. A certain space is generated between the), which is called the resonance space (204).

The resonance housing 200 provides air damping by compressing and feeding back the air flow, particularly in the vicinity of the bass resonance region, through the resonance space 204, thereby providing a reinforcement in the bass region and enhancing the aftertaste in the middle region.

In addition, the through hole 203 serves as an air inflow and outflow into the third discharge port 173 of the frame 130 to allow air to remain in the resonance space 204.

13 is an exemplary view illustrating a state in which the earphone is mounted in the state in which the resonance housing 200 according to the present invention is included.

Referring to FIG. 13, the unit 100 according to the present invention may be mounted in a kernel-type earphone body in a state including a resonance housing 200, so that the unit 100 may be suitably applied to a kernel-type earphone structure that pursues small sound quality and pursues excellent sound quality.

The operation of the unit 100 according to the present invention will be described with reference to the accompanying drawings based on the above configuration.

The unit 100 according to the present invention has two vibration parts, called first and second vibration parts 120 and 140, but the second vibration part 140 is composed of a magnetic circuit, and also the first and second vibration parts 120 and 140. ) Is driven by one voice coil 123. Since the first and second vibrators 120 and 140 do not have ventilation holes on their own, both vibrators 120 and 140 may achieve only sound expression.

The first and second vibrators 120 and 140 have the purpose of sound expression, but the first vibrator 120 reproduces the sound up to a midrange or higher treble over a predetermined band for a more wideband sound reproduction. 150) is responsible for the sound reproduction function from the bass to a constant mid-band.

The configuration that performs the function of the second diaphragm is the yoke 144 surrounding the magnet 143. In the present invention, the air vibrates directly from the yoke 144 of the second vibrator 140. After all, the magnetic circuit unit 141 has a structure for directly vibrating air.

The magnetic circuit unit 141 and the first diaphragm 121 are closely located to each other so that the first diaphragm 121 for the mid-high sound is directly driven by the voice coil 123, and the bass sound of the magnetic circuit unit 141 is reduced. By vibrating the air directly by the yoke 144 and the second diaphragm, it is inverted 'in phase' back to the first diaphragm 121. By this action / reaction, the vibration directions of the first and second vibration parts 120 and 140 are opposite to each other. Accordingly, the unit 100 according to the present invention is capable of reproducing broadband as one electric input channel and making it thin.

As mentioned above, the resonant frequency of a conventional vibrator is determined by the correlation between the equivalent stiffness of the edge and the equivalent mass of the vibrating body.

Based on the above reason, the first vibrating unit 120 having a lower relative mass and the second vibrating unit 140 including a magnetic circuit unit having a higher relative mass may exhibit different resonance regions, and as a result, this phenomenon may occur. One channel, but at the same time, allows the reproduction of sound at different frequencies.

Referring to the drawings, the first diaphragm 121 may be reproduced up to a high-pitched region above a resonance frequency through the shape of the first edge 122 protruding or bending at an appropriate bending angle. In the case of the yoke 144 corresponding to the dedicated second diaphragm, the surface is flat in structure, so that the yoke 144 can be reproduced only from the resonant frequency up to a predetermined frequency. For this reason, the yoke 144 dedicated to the low tone is reproduced from the bass region to the middle portion of the predetermined portion, and the first vibrating plate 121 for the medium and high tone is reproduced from the middle portion to the high tone region of the predetermined portion.

The vibration principle of the second vibration unit 140 of the present invention follows the operation principle of a known acoustic vibration combined function speaker. However, in the conventional vibration function speaker, the resonance of the magnetic circuit part is used for the vibration purpose, but in the present invention, the yoke 143 included in the magnetic circuit part 141 is used as the diaphragm to reproduce the bass sound.

For the function of vibration only, a low frequency dissipation structure is needed so that sound is not generated at the vibration frequency possible. However, where the purpose of sound generation is to transmit the generated vibrations in the air without being extinguished as much as possible.

Therefore, the unit according to the present invention, in order to deliver the generated vibration in the air without dissipation as possible, the outside of the yoke 144 serving as the second diaphragm to the second edge 147, the communication of the front and rear air is blocked. It forms and transmits the vibration generated directly in the yoke 144 in the air.

14 is an air distribution structure diagram showing an air distribution structure through the discharge port of the unit 100 according to the present invention.

As can be seen with reference to Figure 14, the first to third discharge ports (171, 172, 173) according to the present invention are separated from each other to induce the flow of air independently, the interaction between the voice coil 123 and the magnet 143 The sound generated by the first diaphragm 121 is emitted through the first discharge port 171 via the first edge 122, and the sound generated by the yoke 144 is the second edge 147 and the first sound. 2 is discharged through the second discharge port 172 via the air chamber 162 and in phase confluence with the sound generated by the first vibrating plate 121 in the first air chamber 161 to allow the first discharge port 171 to be discharged. ) Is released. In this principle, the sound generated in the second eastern part 140 according to the present invention is synthesized in the same phase without cancellation.

At the time of vibration, the air of the third air chamber 163 which is formed to be compressed and expanded at the contact surface of the yoke 141 corresponding to the lower surface of the first vibration plate 121 and the second vibration plate is discharged from the third discharge port ( Although the name is expressed as the discharge port, it is guided to the position of the range that is not offset with the first discharge port 171 through the simultaneous acting as the inlet of the air (163). As a result, the reproduction frequency characteristic of the first vibration unit 120 may also be emitted by the third discharge port 163.

In this manner, the sound generated by the first first vibrator 120 and the second vibrator 140 may be synthesized through the reverse phase or the second discharge port 172. Is generated is emitted in the same phase as the first vibration unit (120).

In addition, the additional configuration of the resonance housing 200 allows the air for resonance to remain in the resonance space 204, thereby pursuing a more realistic bass expression.

15 is a cross-sectional view showing another embodiment of a unit according to the present invention. The second to fourth embodiments shown in FIG. 15 describe additional structures that can properly induce and control the flow of air to vibrations generated in yoke 144. 15 (a) to (c), the third discharge port 173 does not exist, but replaces its role by a separate vent.

Figure 15 (a) is a second embodiment of the unit according to the present invention, the yoke vent 182 is additionally formed in the cross section on the plate 142 provided on top of the magnet 143 of the yoke (! 44) The bottom surface is bent to extend further vertically up to the terminal plate 150, from which the yoke vents 181 to the bottom of the unit 100 in the vertically downward direction along the inner central portion of the magnet (! 43) and the yoke 144. ) Is formed, and the terminal plate 150 is provided with a third edge 183 which is convex, similarly to the first edge 122 formed on the first gasket 124.

According to this configuration, the vent hole 190 is formed at the bottom of the unit 100 to directly induce the air flow or draw-out flow generated by the vibration of the yoke 144 by the vent hole, and in this process, the third edge 183 performs the same resonant frequency shaping induction role as the first edge 122 described above.

FIG. 15 (b) is a third embodiment according to the present invention, similar to the structure of the unit (first embodiment) described below with reference to FIG. 5, but similar to the second embodiment, the yoke air bubble is formed on the upper surface of the plate 142. 182 is formed and corresponding portions of the terminal plate 150 located below the yoke vent 181 and the yoke vent 181 formed through the center portions of the magnet 143 and the yoke 144 therefrom. Vent hole 190 is formed in the. By such a structure, the vent hole 190 induces the withdrawal of air, and the air is discharged to the vent hole 190 through the second air chamber 162 by the vibration generated from the yoke 144. The bottom of 100) induces the release of air.

15 (c) is a fourth embodiment of the unit 100 according to the present invention, in which the yoke vent 181 is formed through the central portions of the magnet 143 and the yoke 144. As in the configuration of the example, but the vent hole 190 is not formed in the terminal plate 150, but the vent hole 195 is formed on one side of the first vibration plate 121, specifically the central portion in the yoke 144 The generated vibration is emitted to the upper surface of the unit 100, that is, the first discharge port 171 through the second air chamber 162 and the second discharge port 172.

16 is a graph showing the output sound curve by the unit 100 according to the present invention.

As can be seen from Figure 16, when looking at the frequency characteristics of the second vibrator 140 there is no separate vent around the sound loss due to its own structure and the sound is emitted through the second discharge port 172 Since it has a non-sealed state, the expression of much higher volume than that of the prior art 1 can be achieved, and the frequency band is broadened.

In addition, when the sound generated through the first and second vibrators 120 and 140 is synthesized by the first discharge port 171, the operating directions due to the vibrations of the first and second vibrators 120 and 140 are mutually different. On the contrary, the sound generated from the second vibrator 140 is reversed and output through the second discharge port 162, so that the sound signal of the synthesized part has the same phase. Is extended from the bass reproduction limit frequency corresponding to the bass resonance portion of the second vibration unit 140 to the limit frequency of the first vibration unit 120.

In addition, the regeneration frequency characteristic of the first vibrator 120 also has a characteristic that the frequency band is widened because the first vibrator 120 does not form a sealed structure by the structure emitted by the third discharge port 163.

17 is a graph illustrating a comparison of acoustic characteristics between the unit 100 according to the present invention and the above-described prior arts 1 and 2.

As can be seen from FIG. 17, it can be seen that the unit according to the present invention has excellent characteristics, particularly in the bass region, and also has a wide range of advantages over the prior arts 1 and 2.

As described so far, the configuration and operation of the electroacoustic conversion unit having the output structure of the same phase bass reversal method with distortion prevention performance according to the present invention have been represented in the above description and the drawings, but this is merely an example. The spirit of the present invention is not limited to the above description and drawings, and various changes and modifications are possible without departing from the technical spirit of the present invention.

As described above, according to the electroacoustic conversion unit having an output structure of the same phase bass reversal system with distortion prevention performance according to the present invention,

1) It has the advantage of widening the frequency band of the output sound by providing a structure that can effectively output sound without depending on the outer housing or cabinet box and without forming the first and second vibrating portion in a sealed structure,

2) the output sound energy is increased by inverting in phase with the generated sound of the first vibration unit without canceling the bass sound generated in the second vibration unit, thereby improving the bass region.

3) It has the advantage of blocking the probability of distortion occurring at the edge part by guiding straight air flow through the damper,

4) The resonance space in the resonance housing can be used to pursue a more realistic bass expression,

5) not only provides an improved structure that can securely mount the vibration unit while protecting the vibration unit,

6) The contact electrode pattern has the effect of eliminating the inconvenience caused by the soldering method and having the elasticity to pursue a more diverse earphone structure.

Claims

An electroacoustic conversion unit with distortion prevention performance,

A protector 110 having a first outlet 171 having an open central portion;

A lower portion of the protector 110 including a first diaphragm 121 having at least one convex first edge 122 and a voice coil 123 formed at a lower side of the first vibrating plate 121. A first vibrator 120 disposed on the;

Magnetic circuit portion 141 having a magnet 143 positioned inside the voice coil 123 and the voice coil 123 and having a yoke 144 serving as a diaphragm, and having a portion recessed downward. A second vibrator 140 having a second edge 147;

An electrode pattern 151 printed on both sides of the terminal plate 150 and spaced apart from the bottom of the second vibrator 140 to be coupled to the bottom surface of the flame 130;

A braking guide positioned to have a ring shape at a lower portion of the first vibrator 120 and an upper portion of the second vibrator 140, and configured to cover portions of the first and second edges 122 and 147. 195 having a damper (190); consisting of,

A plurality of second discharge holes 172 are formed around the inner wall of the frame 130 in the vertical direction toward the upper surface, and the sound generated by the vibration of the yoke 144 is the terminal. Inverted and moved through the second discharge port 172 by the plate 150 is synthesized in phase with the sound generated by the first vibrating unit 120 and then output to the first discharge port 171 Electroacoustic conversion unit.

The method of claim 1,

A first air chamber 161 is formed between the protector 110 and the first vibration plate 121, and a second air chamber 162 is formed between the second vibration unit 140 and the terminal plate 150. An electroacoustic conversion unit, characterized in that is formed.

The method of claim 1,

Electroacoustic transducer unit, characterized in that the third air chamber (163) is formed between the first and second edges (122,147) in the frame (130).

The method of claim 3, wherein

Electro-acoustic conversion unit, characterized in that the third discharge port (173) which is penetrated in the transverse direction from the side wall of the frame (130) to the inner third air chamber (163).

The method of claim 1,

The inner circumferential surface of the frame 130 has a stepped structure having first and second vibrating parts attaching surfaces 134 and 135 for accommodating the first and second vibrating parts 120 and 140, but with the first and second vibrating parts attached thereto. An electroacoustic transducer unit, characterized in that an adhesive guide (133) is formed on the surface (134,135) and the inner wall of the frame (130) around the adhesive to uniformly apply the adhesive.

The method of claim 4, wherein

A resonance housing 200 is additionally mounted on the outside of the frame 130 to accommodate the frame 130, but the resonance housing 200 penetrates laterally to coincide with the third discharge port 173. A sphere (203) is formed, characterized in that spaced apart from the frame 130 to form a resonance space (204), an electroacoustic conversion unit.

The method of claim 1,

The electrode pattern 151 forms a cathode electrode pattern 151a at the center of the terminal plate 150, forms a cathode connection pattern 151b outwardly at a predetermined distance, and forms the cathode electrode pattern 151b. And a voice coil anode junction 153 connected to the terminal coil 150, and a voice coil anode junction 152 is spaced apart from the anode electrode pattern 151a at a rear surface of the terminal plate 150, but has a through hole at an upper surface of the terminal plate 150. 154, the electroacoustic conversion unit, characterized in that the connection configuration.

The method of claim 1,

The yoke vent hole (181) is formed in the center of the magnet (143) and the yoke (144), the electro-acoustic conversion unit.

The method according to claim 1 or 8,

The yoke 144 is bent from the bottom surface is formed extending toward the terminal plate 150, the terminal plate 150 is characterized in that it comprises a convex third edge 183, electroacoustic conversion unit.