KR100576267B1 - Plane speaker having plural coil plate - Google Patents

Abstract

The present invention, the base frame is formed in a concave shape with an upper end open; It is formed into a size that can be inserted into the base frame, and the permanent magnet generating opposite poles on the upper and lower surfaces, the upper plate coupled to the upper surface of the permanent magnet, and the base frame coupled to the lower surface of the permanent magnet. Two or more magnetic bodies are configured to include a bottom plate coupled to the bottom surface of the at least two magnetic bodies coupled to the base frame to be arranged in a parallel structure spaced apart from each other at the same time and the polarity of the neighboring permanent magnets to cross; A diaphragm formed in a flat plate shape having an area retractable into the base frame and having an adhesive member attached to an upper surface of the base frame at an edge thereof; The voice speaker is formed in a flat plate shape in which a current coil is fixed in an arrangement direction of a magnetic body, and includes a flat plate speaker including one or more coil plates coupled to the bottom surface of the diaphragm at an angle that can be inserted between the magnetic bodies. to provide.

Speaker, flat plate, coil plate, voice coil, permanent magnet

Description

Plane speaker having plural coil plate

1A is a schematic cross-sectional view of a conventional flat panel speaker.

1B is an exploded perspective view illustrating a coupling structure of a voice coil, a permanent magnet, and a plate applied to a conventional flat speaker.

Figure 2a is an exploded perspective view of a flat speaker having a plurality of coil plates according to the present invention.

2B is a vertical cross-sectional view of a flat panel speaker having a plurality of coil plates according to the present invention.

Figure 3 shows the principle of operation of the diaphragm applied to the present invention.

4 is a circuit diagram applied to the flat panel speaker according to the present invention.

5A illustrates a shape in which a coil plate of a flat panel speaker according to the present invention is applied to an integrated double-sided voice coil plate.

FIG. 5B is a cross-sectional view taken along the line A-A shown in FIG. 5A.

FIG. 5C illustrates a shape in which the integrated double-sided voice coil plate of FIGS. 5A and 5B is applied to the flat panel speaker according to the present invention.

5D is a vertical cross-sectional view of the flat panel speaker shown in FIG. 5C.

Figure 6a shows a shape in which the coil plate of the flat panel speaker according to the present invention is applied to a separate double-sided voice coil plate.

FIG. 6B is a cross-sectional view taken along the line B-B shown in FIG. 5A.

<Description of Symbols for Main Parts of Drawings>

100: base frame 110: side opening

120: bottom opening 200: magnetic body

210: permanent magnet 220: top plate

230: lower plate 300: vibration plate

310: adhesive member 400: coil plate

402: connecting groove 404: connecting means

410: voice coil 412: front voice coil

414 rear voice coil

The present invention relates to a flat speaker having a flat diaphragm, and more particularly to a flat speaker configured to have two or more coil plates on which a voice coil is wound.

The speaker converts an electrical signal into a voice signal, and is configured to regenerate voice by vibrating a diaphragm connected to the voice coil by driving the voice coil through a magnetic circuit composed of a permanent magnet, an upper and lower plates, and a center pole.

Generally, the bass speaker has a cone-shaped diaphragm, and the cone-shaped diaphragm of the bass speaker undesirably splits when the frequency increases when radiating sound waves. The split vibration occurs differently in the mid and high frequencies of the frequency. First, the split vibration occurs in the mid range due to the resonance of the edge part around the cone. When the frequency gets higher and reaches the high range, resonance of the connector occurs, and sound waves do not occur above the frequency at which the resonance of the connector occurs. The high range limit is determined according to the natural resonant frequency (fo) of the speaker unit, and the natural resonant frequency can be obtained from the following equation.

=================> (식 1) fo = 1 / 2π

=================> (Equation 1)

fo: inherent resonant frequency, m: moving part effective mass, s: stiffness

As can be seen from the above equation, the high range limit is determined by several factors such as the size of the speaker unit, the effective mass of the moving part, and the stiffness.

While reproducing the entire audio frequency range with a single speaker is a desired characteristic of the speaker, the characteristics of the conventional cone-shaped speaker are due to the division vibration, which results in deterioration of sound quality and limitation of high range, In order to solve the problem of not smoothly radiating, the band is divided into low and high sound by changing the size of the speaker, and the solution is solved by combining the speakers for each band. However, the speaker configured as described above increases the installation space, thereby increasing the cabinet in which the speaker is built, thereby causing a problem in that the speaker system also increases the installation space.

In order to solve the above problems of the cone-shaped speaker, various types of flat-type speakers have been devised in recent years.

Hereinafter, a conventional flat speaker will be described with reference to the accompanying drawings.

FIG. 1A is a schematic cross-sectional view of a conventional flat speaker, and FIG. 1B is an exploded perspective view illustrating a coupling structure of a voice coil, a permanent magnet, and a plate applied to a conventional flat speaker.

As shown in FIGS. 1A and 1B, the planar coil plate 36 to which the planar diaphragm 30 is fixed perpendicularly to the upper end is formed by the upper plates 31a, 31b, 31c, 31d, 32a, 32b, 32c, and 32d. It is inserted between the assembly of permanent magnets 37 fixed between the lower plates 33a, 33b, 33c, 33d, 34a, 34b, 34c, 34d, and the assembly of the permanent magnet and the upper and lower plates is fixed to the base frame 35. do. Then, the edges 39 are bonded to each other at the edge of the flat diaphragm 30 and fixed by the guide ring.

The current generated in the speaker drive circuit is supplied to the voice coil 38 fixed to the coil plate 36 to form a magnetic field in the voice coil 38, which emits from the magnetic poles of the assembly of the permanent magnet plates facing each other. It interacts with the magnetic field to generate a force to vibrate the coil plate 36 and the flat diaphragm 30 fixed thereto. Due to the vibration of the diaphragm 30, the sound is output to the outside.

However, in the conventional flat panel speaker having the above-described structure, the coil plate 36 is formed in a thin band shape, and then, between the pair of upper plates 31 and 32 and between the pair of lower plates 33 and 34. Since it has to be bent several times so that it can be inserted, the design and production of the coil plate 36 have to be carried out separately according to the size of the flat speaker and the coupling shape between the plates 31 to 34. In addition, since there is a technical difficulty in increasing the length while maintaining the top view of the coil plate 36, there is a problem that there is a limit in increasing the size of the flat speaker.

In addition, the voice coil 38 applied to the conventional flat panel speaker may not only be disconnected in the process of bending the coil plate 36 but also may be damaged in the process of being inserted between the plates 31 to 34. There was also a disadvantage.

The present invention has been made to solve the above problems, it is an object to provide a flat speaker configured not to bend the coil plate, the component can be compatible regardless of the size between the flat speaker.

The present invention relates to a flat speaker having a flat diaphragm, and more particularly to a flat speaker configured to have two or more independent coil plates on which a voice coil is wound.

A flat panel speaker according to the present invention comprises: a base frame; Three or more magnetic bodies coupled to the base frame such that positions of different polarities are crossed and spaced apart from each other by a predetermined interval; A diaphragm; Voice coils for current flow are coupled to each other and comprises two or more coil plates coupled to the diaphragm in a structure capable of drawing in between the gaps between the magnetic bodies.

At this time, the magnetic body is coupled to the base frame in a parallel structure so that the spacing between each magnetic body is parallel, it is preferable that the coil plate is also configured to be coupled to the diaphragm in a parallel structure so as to be able to draw between the interval between the magnetic bodies.

The voice coil is spirally coupled on the coil plate, and the coil plate is coupled such that the upper end and the lower end of the voice coil are positioned at the upper end and the lower end of the magnetic body, respectively.

The magnetic body is formed of a size that can be inserted into the base frame and has a permanent magnet having opposite poles on the upper and lower surfaces thereof, and an upper plate and voice coupled to the upper surface of the permanent magnet so as to correspond to the upper end of the voice coil. The bottom plate is coupled to the bottom surface of the permanent magnet so as to correspond to the bottom end of the coil and is configured to include a bottom plate coupled to the bottom of the base frame. At this time, the coil plate is coupled so that the upper end and the lower end of the voice coil are located at the upper end and the lower end of the magnetic body, respectively.

The voice coil may be configured to be coupled to either side of the front or rear of the coil plate, or may be configured to be coupled to the front and rear of the coil plate.

When the voice coil is coupled to the front and rear of the coil plate, the voice coil is configured to include a front voice coil that is spirally coupled on the front of the coil plate, and a rear voice coil that is spirally coupled on the rear of the coil plate; The coil plate includes a connecting groove formed to penetrate a portion of the center portion, and a connecting means formed to connect the front voice coil and the rear voice coil through a connecting groove in a circuit manner.

In addition, when the voice coil is coupled to the front and rear of the coil plate, the voice coil may be configured to be continuously wound around the front and rear of the coil plate through the coupling groove of the coil plate.

The base frame is formed with one or more side openings penetrating the side wall surface and one or more bottom openings penetrating the bottom surface so as to allow air flow between the inside and the outside even if the top is closed by the diaphragm.

At this time, the adhesive member is preferably made of a material having flexibility so that the diaphragm can be vibrated in the vertical direction.

Hereinafter, an embodiment of a flat panel speaker having a plurality of coil plates according to the present invention will be described with reference to the accompanying drawings.

Figure 2a is an exploded perspective view of a flat speaker having a plurality of coil plates according to the present invention.

As shown in FIG. 2A, a flat speaker having a plurality of coil plates according to the present invention includes a base frame 100 formed in a concave shape having an upper end opened, and a plurality of magnetic bodies 200a to magnetic field formation. 200e), the lower surface of the diaphragm 300 at an angle which can be inserted between the diaphragm 300 formed in the shape of a plate of the area which can be retracted into the base frame 100, and the magnetic bodies 200a to 200e. It is configured to include a coil plate 400a ~ 400d coupled to.

The magnetic bodies 200a to 200e are formed in a rod shape having a size that can be inserted into the base frame 100 and are made of permanent magnets 210a to 210e that generate opposite poles on the top and bottom surfaces thereof, and a magnetic material. Upper plates 220a to 220e and upper plates 220a to formed to have a plate shape having a size that can cover the upper surfaces of the permanent magnets 210a to 210e to closely contact the upper surfaces of the permanent magnets 210a to 210e. 220e) is formed of the same material and size and is configured to include the bottom plate (230a ~ 230e) coupled to the bottom surface of the permanent magnet (210a ~ 210e) and coupled to the bottom surface of the base frame 100 at the same time. Accordingly, the upper plates 220a to 220e have the same polarity as the upper surfaces of the permanent magnets 210a to 210e, and the lower plates 230a to 230e have the same polarities as the lower surfaces of the permanent magnets 210a to 210e. do.

In addition, the magnetic bodies 200a to 200e are arranged in a parallel structure spaced apart from each other in a direction perpendicular to the longitudinal direction, and at the same time, the upper and lower positions are inverted so that the polarity and the neighboring magnetic bodies cross each other. 100). Therefore, each magnetic body (200a ~ 200e) is generated by the attraction force to attract another neighboring magnetic body. At this time, in the present embodiment, the magnetic bodies 200a to 200e and the coil plates 400a to 400d are arranged in a parallel structure, but the magnetic structure 200a to 200e and the coil plates 400a to 400d are arranged in this manner. It is possible to change the structure of various shapes without being limited.

The diaphragm 300 is formed in a flat plate shape having an area that can be drawn into the base frame 100, and an adhesive member 310 extending outward in a direction parallel to the top surface of the diaphragm 300 is provided at an edge thereof. It is coupled to the top surface of the base frame 100. At this time, the adhesive member 310 is made of a material having flexibility such as fabric and paper so that the vibration plate 300 can be vertically vibrated in the vertical direction, the vibration plate 300 is the base frame 100 even if the vertical vibration in the vertical direction It is formed to have an area smaller than the opening formed in the upper end of the base frame 100 so as not to interfere with. Since the material and structure of the diaphragm 300 is the same as the diaphragm applied to a conventional flat speaker, a detailed description thereof will be omitted.

Voice coils 410a to 410d are spirally wound to one side of the coil plates 400a to 400d. At this time, the voice coils (410a ~ 410d) is wound in a track shape that the upper end and the lower end is horizontal, the coil plate (400a ~ 400d) is the upper end and the lower end of the voice coils (410a ~ 410d) upper plate (220a ~ 220e) It is coupled to be positioned between the liver and between the lower plate 230a ~ 230e, respectively.

Therefore, the coil plates 400a to 400d applied to the present invention are not coupled in a bent state as in the conventional coil plate, but are coupled in a flat form as shown in FIG. 2A, and thus, the voice coils 410a to 410d are formed. The disconnection concerns will be resolved. In addition, in order to increase the size of the flat panel speaker, the size of the flat panel speaker can be increased by increasing the number without increasing the length of the coil plates 400a to 400d. No.

In addition, the base frame 100 may include at least one side opening 110 penetrating the sidewall surface and at least one penetrating bottom surface such that air flow between the inside and the outside may be allowed even if the upper opening is closed by the diaphragm 300. The bottom opening 120 is formed.

When the side opening 110 or the bottom opening 120 is not formed in the base frame 100, when the diaphragm 300 coupled to close the top of the base frame 100 vibrates up and down, the base frame ( Since the internal pressure of the 100 is increased, the diaphragm 300 is not affected by the normal vibration by the current and the magnetic flux alone, and is affected by the internal air pressure of the base frame 100. However, when the side opening 110 and the bottom opening 120 are formed in the base frame 100 as shown in FIG. 2A, since the internal pressure fluctuation of the base frame 100 does not occur, the diaphragm 300 is formed. Is normal vibration by current and magnetic flux only.

2B is a vertical cross-sectional view of a flat panel speaker having a plurality of coil plates according to the present invention.

As shown in FIG. 2B, four coil plates 400a to 400d and five magnetic bodies 200a to 200e are applied in this embodiment. The first coil plate 400a to the fourth coil plate 400d are not in contact with the magnetic bodies 200a to 200e and are spaced between the first magnetic bodies 200a to the fifth magnetic bodies 200e so as to maintain a minute spacing. Inserted respectively, the diaphragm 300 is coupled so as not to interfere with the base frame 100 and the magnetic bodies (200a ~ 200e) even if the vibration up and down.

In addition, the bottom opening 120 has a base frame 100 at a portion corresponding to the lower end of the coil plates 400a to 400d when the diaphragm 300 and the coil plates 400a to 400d are coupled to the base frame 100. ) Is formed on the bottom surface. Therefore, even if the vertical amplitude of the diaphragm 300 increases, the coil plates 400a to 400d are not in contact with the bottom surface of the base frame 100, so that the diaphragm 300 can vibrate normally without external interference. .

Figure 3 shows the principle of operation of the diaphragm applied to the present invention.

As shown in FIG. 3, the second magnetic body 200b is inverted up and down so that the position of the polarity intersects with the neighboring first magnetic body 200a and the third magnetic body 200c, such that the base frame 100 is inverted. Coupled to the first voice coil 410a and the second voice coil 410b, the current flows in the opposite direction.

In the present embodiment, the second magnetic body 200b is coupled so that the upper end thereof has the S pole, and the first magnetic body 200a and the third magnetic body 200c are coupled so that the upper end thereof has the N pole. The current of the first voice coil 410a flows in the clockwise direction, and the current of the second voice coil 410b flows in the counterclockwise direction. In addition, the fourth magnetic body 200d and the fifth magnetic body 200e, which are not shown in FIG. 3, are also coupled to cross the polarities of the neighboring magnetic bodies 200a to 200e, and the third voice coil 410c. The fourth voice coil 410d is also configured to allow current to flow in a direction opposite to the neighboring voice coils 410a to 410d.

Thus, the diaphragm 300 in the state shown in FIG. 3 is forced to move upwards according to Fleming's left hand law. The vibration plate 300 vibrates with various amplitudes and periods according to the strength and direction of the current flowing through each voice coil 410a to 410d, and the sound is output to the outside by the vibration.

4 is a circuit diagram applied to the flat panel speaker according to the present invention.

In the flat panel speaker according to the present invention, as shown in FIG. 4, the first voice coil 410a and the second voice coil 410b, the third voice coil 410c and the fourth voice coil 410d are respectively serialized. Connect with In addition, the first voice coil 410a and the second voice coil 410b, and the third voice coil 410c and the fourth voice coil 410d are connected in parallel.

Therefore, the flat panel speaker according to the present invention can change the direction of the current flowing through each of the voice coils 410a to 400e by using the same power source through the circuit structure of the series and parallel structure.

In this case, the method of controlling the direction of the current flowing through each of the voice coils 410a to 410d is not limited to the method using the circuit configuration shown in FIG. 4, and various methods may be applied.

FIG. 5A illustrates a shape in which a coil plate of a flat panel speaker according to the present invention is applied to an integrated double-sided voice coil plate, and FIG. 5B is a cross-sectional view taken along line A-A of FIG. 5A.

In order to increase the cross-sectional area of the coil coupled to the coil plate 400 in order to increase the force applied to the coil plate 400, the voices on both sides of the coil plate 400 as shown in FIGS. 5A and 5B. Coil 410 may be coupled.

When the voice coil 410 is coupled to both sides of the coil plate 400, the coil plate 400 is

A connection groove 402 penetrating the side surface is formed at the central position, and the voice coil 410 is spirally wound on one side of the coil plate 400 and then coupled to the opposite side of the coil plate 400 through the connection groove 402. After going to the side, it is continuously wound and combined. At this time, even if the coupling position of the voice coil 410 is changed from one side of the coil plate 400 to both sides of the coil plate 400, the vortex winding direction of the voice coil 410 is maintained the same, the magnetic body 200 The direction of the force applied to the coil plate 400 by the magnetic flux generated from the current flowing through the voice coil 410 is not changed.

FIG. 5C illustrates a shape in which the integrated double-sided voice coil plate of FIGS. 5A and 5B is applied to the flat panel speaker of the present invention, and FIG. 5D illustrates a vertical cross section of the flat panel speaker illustrated in FIG. 5C.

5C and 5D, when the voice coil 410 is coupled to both sides of the coil plate 400, the cross-sectional area of the voice coil 410 is increased compared to the flat speaker shown in Figs. 2A and 2B. As a result, the force for moving the coil plate 400 upward is also increased.

In addition, although the structure of the voice coil 410 coupled to the coil plate 400 is changed, the shape and coupling structure of the magnetic body 200 and the diaphragm 300 coupled to the base frame 100 are shown in FIGS. 2A and 2B. It remains the same as the flat panel speaker shown in FIG.

FIG. 6A illustrates a shape in which a coil plate of a flat panel speaker according to the present invention is applied as a separate double-sided voice coil plate, and FIG. 6B is a cross-sectional view taken along line B-B of FIG. 5A.

As shown in FIGS. 6A and 6B, when the voice coils 410 coupled to both sides of the coil plate 400 are separated and combined, the voice coils 410 are formed on the front surface of the coil plate 400. It is composed of a front voice coil 412 coupled to the spiral winding, and a rear voice coil 414 coupled to the spiral winding on the rear surface of the coil plate 400.

In addition, the coil plate 400 is a connection groove 402 formed to penetrate a portion of the central portion, and connecting means for connecting the front voice coil 412 and the voice coil 414 through the connection groove 402 (circuit) ( 404).

In this case, the connecting means 404 for connecting the front voice coil 412 and the rear voice coil 414 through the connection groove 402 is a conductor contacting the front voice coil 412 and the rear voice coil 414. Apply. In addition, the method of connecting the front voice coil 412 and the rear voice coil 414 may be any combination method for allowing current flow between the front voice coil 412 and the rear voice coil 414 such as welding and soldering. It can be applied in a way.

As such, the structure in which the voice coil 410 is coupled to both sides of the coil plate 400 is the same as the structure of the voice coil plate applied to the 'flat speaker having both sides voice coil plate' filed by the present applicant. Detailed description thereof will be omitted.

In the above, the present invention has been described in detail by using a preferred embodiment, but the scope of the present invention is not limited to the specific embodiments, it should be interpreted by the appended claims, in particular the arrangement of the magnetic body and coil plate It should be appreciated that the present invention is not limited to a parallel structure but may be applied in various shapes. In addition, those skilled in the art should understand that many modifications and variations are possible without departing from the scope of the present invention.

The use of a flat panel speaker having a plurality of coil plates according to the present invention prevents the coil coil from being bent and thus prevents breakage of the voice coil, and increases the number of coil plates and magnetic bodies, thereby making it possible to enlarge the speaker. have.

In addition, the flat panel speaker having a plurality of coil plates according to the present invention has the advantage that the compatibility of components is increased by using coil plates and magnetic bodies having the same shape even when the size is increased.

Claims (10)

A base frame 100; Three or more magnetic bodies 200 coupled to the base frame 100 so that positions of different polarities cross and are spaced apart from each other by a predetermined interval; A diaphragm 300; Two or more coil plates 400 coupled to the diaphragm 300 in a structure capable of being drawn in between the magnetic bodies 200; Flat coil speaker, characterized in that the voice coil 410 is coupled to any one of the front or rear of the coil plate 400 for the flow of current. The method of claim 1, The magnetic body 200, Coupled to the base frame (100) in a parallel structure; The diaphragm 300 is, Flat panel speaker, characterized in that coupled to the diaphragm 300 in a structure parallel to each other to be able to pull in the gap between the magnetic body (200). The method of claim 2, The voice coil 410, It is wound around the coil plate 400 and coupled; The coil plate 400, Flat top speaker, characterized in that coupled to the upper end and the lower end of the voice coil 410, respectively located on the upper end and the lower end of the magnetic body (200). The method of claim 3, wherein The magnetic body 200, A permanent magnet 210 having a size that can be inserted into the base frame 100 and generating opposite poles on the top and bottom surfaces thereof; An upper plate 220 coupled to an upper surface of the permanent magnet 210 to correspond to an upper end of the voice coil 410; A bottom plate 230 coupled to a bottom surface of the permanent magnet 210 so as to correspond to a bottom portion of the voice coil 410 and coupled to a bottom surface of the base frame 100; Flat speaker comprising a. delete The method according to any one of claims 1 to 4, The base frame 100 is Flat panel speaker, characterized in that any one or more of the side opening (110) penetrating the side wall surface and the bottom opening (120) penetrating the bottom surface. The method according to any one of claims 1 to 4, The voice coil 410, A front voice coil 412 that is spirally coupled to the front surface of the coil plate 400, It comprises a back voice coil (414) that is spirally wound on the back of the coil plate (400); The coil plate 400, A connection groove 402 formed to penetrate a portion of the center portion, And a connecting means (404) formed so that the front voice coil (412) and the rear voice coil (414) are connected to the circuit through the connection groove (402). The method of claim 7, wherein The base frame 100, Flat panel speaker, characterized in that any one or more of the side opening (110) penetrating the side wall surface and the bottom opening (120) penetrating the bottom surface. The method according to any one of claims 1 to 4, The coil plate 400, A connection groove 402 penetrating a portion of the center portion is formed; The voice coil 410, Flat speaker, characterized in that coupled to the winding continuously to the front and rear of the coil plate 400 through the connecting groove (402). The method of claim 9, The base frame 100, Flat panel speaker, characterized in that any one or more of the side opening (110) penetrating the side wall surface and the bottom opening (120) penetrating the bottom surface.

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