KR102170735B1 - Panel excitation type speaker - Google Patents

Abstract

The present invention relates to a panel excitation type speaker, and more specifically, to the panel excitation type speaker, which is attached to a panel to vibrate the panel to reproduce sound. The panel excitation type speaker includes: a frame provided with a first hole; an upper plate has a ring shape, is fixedly installed around the first hole, and a second hole is provided in the center; a yoke fixedly installed on the bottom of the upper plate and having a permanent magnet, accommodated therein, generating magnetic flux; a center pole fixed to an upper part of the permanent magnet and inserted into the second hole of the upper plate to form a magnetic gap between the upper plate and the center pole; a voice coil positioned in the magnetic gap and wound around a bobbin; and a damper in which an upper end of the bobbin is fixed to the bottom surface while being supported by the center pole, wherein the damper is attached to the panel and configured to transmit the vibration of the bobbin to the panel. The present invention provides the panel excitation type speaker with excellent sound quality reproduction capability for low tones.

Description

Panel excitation type speaker

The present invention relates to a panel excitation type speaker, and more particularly, to a panel excitation type speaker with improved reproducibility for low sound.

A speaker is a sound device that converts electrical signals into vibrations of a diaphragm and generates small waves in the air to radiate sound waves. The dynamic speaker includes a frame, a magnetic circuit unit installed on the frame and generating magnetic force, and a sound generator unit installed on the frame and having a vibration plate that vibrates and reproduces sound while acting with the magnetic circuit unit.

Since the dynamic speaker requires a space corresponding to the amplitude of the sound generating unit, it is limited to be installed and used in a thinner flat panel display device.

In order to solve the above problems, a panel excitation type speaker has been developed and used by installing a speaker on a panel of a flat panel display and vibrating the panel to reproduce sound. On the other hand, such panels are widely used in picture frames and other various panel parts in addition to flat panel display devices.

A flat panel display device in which such a panel excitation type speaker is installed reproduces sound while the panel vibrates. That is, since sound is reproduced from the panel on which the image is displayed, the three-dimensional effect of sound is improved.

1 is a partial exploded perspective view of a conventional panel excitation type speaker, which will be described. As shown, the conventional panel excitation type speaker is installed on the frame 10 and the frame 10 installed on the panel P, and is installed on the magnetic circuit unit 20 and the frame 10 that generate magnetic force, and the magnetic circuit unit It includes an exciter (30) that vibrates the panel (P) while vibrating by acting with (20).

The magnetic circuit unit 20 includes a yoke 21 coupled to the frame 10, a magnet 23 and a pole piece 25 sequentially stacked and installed inside the yoke 21, and the exciter 30 includes a voice It includes a coil 31 and a damper 35. Further, the voice coil 31 includes a bobbin 31a and a coil 31b wound on an outer peripheral surface of one end side of the bobbin 31a.

A ring-shaped cap 41 is coupled to the other end surface of the bobbin 31a, and one surface of the adhesive member 45 is adhered to the cap 41. In addition, the other surface of the adhesive member 45 is adhered to the panel P, thereby helping the other end surface side of the bobbin 31a to be adhered to the panel P.

Thus, when an electrical signal is applied to the coil 31b, the voice coil 31 vibrates by the action of the magnetic circuit unit 20 and the coil 31b, and the panel P is vibrated by the vibration of the voice coil 31. Plays sound while vibrating.

In order to supply electrical signals to the coil 31b, a terminal plate 51 is installed on the frame 10, and a tinsel wire 53 is installed on the outer peripheral surface of the bobbin 31a. One side and the other side of the terminal plate 51 are connected to an external power supply side and one end of the tinsel wire 53, respectively, and the other end of the tinsel wire 53 is connected to the lead wire of the coil 31b.

This conventional technique has the following problems.

The conventional technology has a disadvantage in that the yoke is fixed to the housing and the vibration of the bobbin is transmitted to the panel, so there is a limitation in implementing the low sound. That is, it is possible to implement the high and low tones as a whole, but there is a disadvantage in that there is a limitation in effectively expressing the reproduction of the low tones, and there is a problem in that a separate woofer for reproducing the low tones should be provided to compensate.

1. Korean Patent Publication No. 10-2009-0039372 (published on April 22, 2009)

The present invention has been created to solve the above-described problems, and more particularly, it is an object of the present invention to provide a panel-excited speaker having excellent sound quality reproduction capability for low tones.

In the panel excitation type speaker of the present invention for achieving the above object, in the panel excitation type speaker attached to a panel to reproduce sound through the panel,

A housing which penetrates in the vertical direction, has an upper end and an open lower end, and has an upper end attached to the panel;

A cylindrical bobbin having an upper end fixedly coupled to the panel and the housing and having a voice coil wound at the lower end;

An upper damper connected to the bobbin to support the bobbin;

A center pole disposed below the upper damper and supporting the center of the upper damper;

A permanent magnet provided under the center pole and generating magnetic flux;

A yoke accommodating the permanent magnet therein;

An outer side is fixedly coupled to the housing, an inner side is coupled to the yoke, and a lower damper supporting the yoke; And

And an upper plate coupled to the yoke, enclosing the outer side of the bobbin, and forming a magnetic gap between the center pole and into which the voice coil is inserted,

When an electric signal is applied to the voice coil, the center pole, permanent magnet and yoke vibrate up and down.

In the panel excitation type speaker,

The upper damper includes a first outer frame coupled to the bobbin, a central portion provided inside the first outer frame and spaced apart from the first outer frame, and a first connecting the first outer frame and the central portion Including a connection,

The central portion of the upper damper may be fixedly supported at the center of the upper end of the center pole.

In the panel excitation type speaker,

The lower damper includes a second outer frame fixed to the inner circumferential surface of the housing, a second inner frame spaced apart from the inside of the second outer frame and fixed to the outer circumferential surface of the yoke, and the second outer frame and the second outer frame. 2 It may include a second connector connecting the inner frame.

In the panel excitation type speaker,

The outer circumference of the second outer frame may have a plurality of irregularities formed along the edge surface.

In the panel excitation type speaker,

The housing,

A cylindrical housing body through which the top and bottom are passed, and

An annular circular frame disposed inside the upper end of the housing body and having a diameter corresponding to the bobbin, and a plurality of connecting bodies connecting the upper end of the housing body and the circular frame, the bobbin The top of the can be combined.

In the panel excitation type speaker,

In the upper damper,

A metal thin plate layer having a shape corresponding to the upper damper and attached to one surface of the upper damper, wherein the voice coil is adhered to the metal thin plate layer, and an external electrical signal is transmitted through the metal thin plate layer. Can be applied to.

The panel excitation type speaker according to the present invention has the advantage of being able to effectively reproduce a low sound as the yoke constituting the magnetic circuit vibrates and reproduces sound.

1 is a view showing a conventional panel excitation type speaker.
2 is an exploded perspective view of a panel excitation type speaker according to an embodiment of the present invention.
Figure 3 is a combined perspective view of Figure 2;
4 is a perspective view of the panel excitation type speaker of FIG. 3 as viewed from below.
Figure 5 is a side view of the panel excitation type speaker of Figure 3;
6 is a sectional view of VI-VI of FIG. 3.
7 is a perspective view of a panel excitation type speaker according to another embodiment of the present invention.
FIG. 8 is a perspective view showing the interior of the speaker with the housing removed in FIG. 7;
9 is an exploded perspective view of an upper damper of the panel excitation type speaker of FIG. 7;

Embodiments of the present disclosure are illustrated for the purpose of describing the technical idea of the present disclosure. The scope of the rights according to the present disclosure is not limited to the embodiments presented below or a detailed description of these embodiments.

All technical and scientific terms used in the present disclosure have meanings generally understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. All terms used in the present disclosure are selected for the purpose of describing the present disclosure more clearly, and are not selected to limit the scope of the rights according to the present disclosure.

Expressions such as "comprising", "having", "having", etc. used in the present disclosure are open terms that imply the possibility of including other embodiments, unless otherwise stated in the phrase or sentence in which the expression is included. It should be understood as (open-ended terms).

Expressions in the singular form described in the present disclosure may include the meaning of the plural form unless otherwise stated, and the same applies to the expression in the singular form described in the claims.

In the present disclosure, when a component is referred to as being “connected” or “connected” to another component, the component may be directly connected to or connected to the other component, or It is to be understood that it may be connected or may be connected via other components.

Hereinafter, embodiments will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding elements are assigned the same reference numerals. In addition, in the description of the following embodiments, overlapping descriptions of the same or corresponding components may be omitted. However, even if description of a component is omitted, it is not intended that such component is not included in any embodiment.

The panel excitation type speaker 100 according to the present invention is a speaker that is attached to the panel P and vibrates the panel P, and at the same time, the yoke 160 constituting the magnetic circuit vibrates up and down, thereby effectively reproducing a low sound ( 100). At this time, the panel P may be any one formed with a flat panel P such as an image display or a picture frame.

The panel excitation type speaker 100 includes a housing 110, a bobbin 120, an upper damper 130, a center pole 140, a permanent magnet 150, a yoke 160, a lower damper 170, and an upper It is configured to include a plate 180.

The housing 110 constitutes the overall external shape of the speaker 100, and is configured such that the upper and lower directions are penetrated and the upper and lower ends thereof are opened.

The housing 110 includes a cylindrical housing body 111 that is vertically penetrated, and an annular circular frame 112 disposed inside the upper end of the housing body 111 and having a diameter corresponding to the bobbin 120 And, it includes a plurality of connecting bodies connecting the upper end of the housing body 111 and the circular frame 112. A terminal 113 to which an external connection line is connected is formed on one side of the housing body 111.

In addition, the circular frame 112 is a portion connected to the bobbin 120 and is configured such that the upper end of the bobbin 120 is coupled to the circular frame 112. In addition, the circular frame 112 is configured such that its upper surface is attached to the lower surface of the panel P.

The connector 1121 connects the upper inner circumferential surface of the housing body 111 and the circular frame 112 so that the circular frame 112 can maintain its position within the upper opening of the housing main body 111.

The bobbin 120 is attached to the panel P while the upper end is coupled to the circular frame 112 of the housing 110 and the voice coil 121 is wound at the lower portion thereof, and has a circular cylindrical shape. . In this case, the voice coil 121 is formed with an insulating layer coated on the surface of the copper wire, and is positioned within a magnetic gap formed between the upper damper 130 and the center pole 140.

In the speaker 100 as described above, when a current is input to the voice coil 121, a driving force (Lorentz force) acts on the voice coil 121 within the magnetic gap according to Fleming's left hand rule, and the panel P The sound waves are radiated by vibrating in the axial direction of the speaker 100. In addition, the upper plate 180, the permanent magnet 150, the yoke 160, and the center pole 140 constituting the magnetic circuit are constantly mixed with a positive potential or a negative potential. Then, the vibration of the voice coil 121 causes magnetic fluctuation, and the (+) potential or the (-) potential existing in the magnetic circuit flows through the magnetic circuit as an overcurrent. At this time, according to Fleming's law, a force acts in a direction that inhibits the vibration direction of the panel P, that is, in a direction perpendicular to the axial direction of the speaker 100.

The upper damper 130 is connected to the bobbin 120 to support the bobbin 120. The upper damper 130 is disposed on the upper end of the voice coil wound on the bobbin 120 and is configured to be connected to the central portion 132 of the bobbin 120. The center of the upper damper 130 is supported at the center of the center pole 140, and the outer portion of the upper damper 130 is coupled to the bobbin 120 to support the bobbin 120.

Specifically, the upper damper 130 is provided inside the first outer frame 131 coupled to the bobbin 120 and the first outer frame 131 and spaced apart from the first outer frame 131 A central portion 132 and a first connecting portion 133 connecting the first outer frame 131 and the central portion 132 is included, and the central portion 132 of the upper damper 130 is the center pole 140 ) Is fixed and supported at the top center of At this time, the first outer frame 131 may have a ring shape and may be configured as a single unit, and a plurality of the first outer frames 131 may be spaced apart in the circumferential direction.

The central portion 132 is formed with a fixing hole 1321 into which a protrusion provided in the binding member 190 installed in the center pole 140 is fitted, and a binding member in the fixing hole 1321 of the central portion 132 ( As the protrusion of 190 is fitted and fixed, the upper damper 130 is configured to be supported by the center pole 140.

The center pole 140 is disposed below the upper damper 130 and supports the center of the upper damper 130.

The center pole 140 is fixed on the upper part of the permanent magnet 150 seated on the yoke 160 and inserted into the upper plate 180 to form a magnetic gap between the upper plate 180 and the upper plate 180.

Specifically, the center pole 140 has a disk shape corresponding to the permanent magnet 150, its outer surface is formed to face the inner circumferential surface of the upper plate 180, and a magnetic gap is provided therebetween.

The center pole 140 is attached to the upper portion of the permanent magnet 150.

In the upper center of the center pole 140, a coupling groove 141 for coupling a binding member 190 for fixing the upper damper 130 is formed.

The permanent magnet 150 is provided under the center pole and generates a magnetic flux.

The permanent magnet 150 is seated in the yoke 160 and has a disk shape. The permanent magnet 150 is a ferrite magnet in which magnetic poles of N and S poles are formed on both ends in the axial direction. These magnets are attached and fixed to the bottom of the yoke 160 by an adhesive or the like. However, the permanent magnet 150 need not be a ferrite magnet. For example, instead of a ferrite magnet, an Alnico magnet, a neodymium magnet, or the like can be used.

The yoke 160 accommodates the permanent magnet 150 therein.

The yoke 160 is fixedly installed on the bottom surface of the upper plate 180 and a permanent magnet 150 generating magnetic flux is accommodated therein. Specifically, the yoke 160 provides a magnetic path for the magnetic flux generated by the permanent magnet 150, and has a shape in which an edge protrudes upward from the disk to provide an accommodation space therein. A disk-shaped permanent magnet 150 is provided in the receiving space of the yoke 160.

The edge of the yoke 160 is coupled to and fixed to the lower surface of the upper plate 180 so that the yoke 160 is connected to the upper plate 180 to provide a path of the magnetic field together with the upper plate 180. do.

The lower damper 170 is fixedly coupled to the housing 110 on the outside, and is coupled to the yoke 160 on the inside and supports the yoke 160.

Specifically, the lower damper 170 is configured to support the yoke 160 while the yoke 160 vibrates up and down. The lower damper 170 is made of a metal or plastic material, and the second outer frame 171 fixed to the inner circumferential surface of the housing 110 and the second outer frame 171 are spaced apart from each other, and the It includes a second inner frame 172 fixed to the outer circumferential surface of the yoke 160 and a second connector 173 connecting the second outer frame 171 and the second inner frame 172.

Specifically, the second outer frame 171 is fixedly coupled to the inner surface of the housing 110, and the yoke 160 vibrates up and down as the second inner frame 172 is fixed in contact with the outer surface of the yoke 160. ) Is configured to support.

The upper plate 180 is coupled to the yoke 160, is wrapped around the bobbin 120, and forms a magnetic gap between the center pole 140 and the voice coil inserted therein. This upper plate 180 has a circular annular shape and its lower surface is fixedly coupled to the upper end of the yoke 160. The upper plate 180 is disposed at a position corresponding to the center pole 140 and a magnetic gap is formed between the inner circumferential surface of the upper plate 180 and the outer circumferential surface of the center pole 140. The voice coil 121 is positioned in the magnetic gap.

This upper plate 180 is a configuration of a magnetic circuit constituting a path of a magnetic field together with the center pole 140, the permanent magnet 150, and the yoke 160, and when a signal is applied to the voice coil 121, the center It is configured to vibrate vertically with the pole 140, the permanent magnet 150, and the yoke 160.

Meanwhile, reference numerals 190, 191, and 192 denote a binding member 190, a metal frame 191, and an adhesive film 192, respectively.

The binding member 190 is positioned between the upper damper 130 and the center pole 140 and performs a function of fixing the upper damper 130 to the center pole 140.

The binding member 190 is composed of a main body portion having an outer diameter smaller than the central portion 132 of the upper damper 130 and a protrusion protruding from the upper and lower centers of the main body portion, respectively. In a state in which the protrusion disposed on the lower side of the main body is fitted and fixed in the coupling groove 141 formed in the center of the center pole 140, the fixing hole 1321 provided at the center of the upper damper 130 with the protrusion formed on the upper end of the main body By being fitted and coupled to the upper damper 130 is configured to be fixed to the center pole (140).

The metal frame 191 is disposed inside the housing 110 and is disposed on the upper side of the upper plate 180, and the metal frame 191 is configured in a circular ring shape and fixed to the housing 110. .

The adhesive film 192 is bonded to the upper end of the bobbin 120 so that the bobbin 120 is fixed to the panel P, and has a ring shape corresponding to the shape of the upper end of the bobbin 120.

The panel excitation type speaker 100 according to the present invention has the following effects.

When an electrical signal is applied to the voice coil 121, the upper end of the bobbin 120 is fixed to the panel, so that the panel does not swing up and down. However, the center pole 140, the permanent magnet 150, the yoke 160, and the upper plate 180 constituting the magnetic circuit around the bobbin 120 are vibrated in the vertical direction. As the magnetic circuit vibrates in this way, it is possible to effectively reproduce the low sound. That is, conventionally, since the magnetic circuit fixed to the housing 110 is configured to vibrate, it is possible to effectively reproduce the low sound.

On the other hand, the present invention includes a separate lower damper 170 for supporting the yoke 160 is configured so that the vibration of the yoke 160 can be made stably.

The panel excitation speaker 100 of the present invention may be modified as follows.

Since the panel excitation type speaker 100 according to another embodiment of the present invention differs from the above-described embodiment in shape and material of the upper damper 130 and the lower damper 170, the difference will be mainly described.

In the panel excitation type speaker 100 according to another embodiment of the present invention, the upper damper 130 has a shape corresponding to the upper damper 130 as shown in FIG. 9 and the upper damper 130 It includes a thin metal plate layer 130 ′ attached to one side. The voice coil 121 is bonded to the thin metal plate layer 130 ′, and an external electrical signal is transmitted through the metal thin plate layer. 121). That is, the upper damper 130 has a thin metal plate layer that transmits an electrical signal, and is connected to one side of the metal thin plate layer of the voice coil 121 and the other side to the terminal 113, so that an external wire is connected to the terminal ( When connected to 113), the signal is transmitted to the voice coil through the thin metal plate layer 130'.

At this time, the metal thin plate layer 130 ′ is preferably made of copper, but is not limited thereto, and any material capable of vibrating vertically together with the upper damper 130 while having excellent conductivity is possible.

Further, the upper damper 130 and the lower damper 170 have a plurality of irregularities formed on the circumferential surface of the edge. That is, irregularities are formed on the outer edge and the inner edge, and when the upper damper 130 is adhered to and fixed to the housing 110 and the yoke 160 by an adhesive, the bond adhesion can be further strengthened.

Specifically, the outer circumferential surface of the upper damper 130 may be fixed to the inside of the metal frame 191, and since irregularities are formed on the outer circumferential surface of the upper damper 130, the adhesion can be further improved.

In addition, the outer circumferential surface of the lower damper 170 is coupled to the housing 110 and the inner circumferential surface is coupled to the yoke 160. At this time, irregularities are formed on the outer circumferential surface and the inner circumferential surface, respectively, so that adhesion to the housing 110 and the yoke 160 There is an advantage in that ability can be improved.

Although the present invention has been described in detail with reference to preferred embodiments above, the present invention is not necessarily limited to these embodiments and modifications, and various modifications may be made without departing from the spirit of the present invention.

100...panel type speaker 110...housing
111...housing body 112...round frame
113...terminal 120...bobbin
121...Voice coil 130...top damper
131...first outer frame 132...central part
133...first connection 140...center pole
150... permanent magnet 160... York
170...lower damper 171...second outer frame
172...2nd inner frame 173...2nd connector
180...top plate P...panel

Claims (6)

In the panel excitation type speaker attached to the panel to reproduce sound through the panel,
A housing that penetrates in the vertical direction, has an upper end and a lower end, and an upper end attached to the panel;
A cylindrical bobbin having an upper end fixedly coupled to the panel and the housing and having a voice coil wound at the lower portion thereof;
An upper damper connected to the bobbin to support the bobbin;
A center pole disposed below the upper damper and supporting the center of the upper damper;
A permanent magnet provided under the center pole and generating magnetic flux;
A yoke accommodating the permanent magnet therein;
An outer side is fixedly coupled to the housing, an inner side is coupled to the yoke, and a lower damper supporting the yoke; And
And an upper plate coupled to the yoke and enclosing the outer side of the bobbin and forming a magnetic gap between the center pole and into which the voice coil is inserted,
When an electric signal is applied to the voice coil, the center pole, the permanent magnet, and the yoke are vibrated up and down. The method of claim 1,
The upper damper includes a first outer frame coupled to the bobbin, a central portion provided inside the first outer frame and spaced apart from the first outer frame, and a first connecting the first outer frame and the central portion Including a connection,
Panel excitation type speaker, characterized in that the central portion of the upper damper is fixed to the center of the upper end of the center pole. The method of claim 1,
The lower damper includes a second outer frame fixed to the inner circumferential surface of the housing, a second inner frame spaced apart from the inside of the second outer frame and fixed to the outer circumferential surface of the yoke, and the second outer frame and the second outer frame. 2 Panel excitation type speaker comprising a second connector for connecting the inner frame. The method of claim 3,
Panel excitation type speaker, characterized in that the outer circumference of the second outer frame has a plurality of irregularities formed along an edge surface. The method of claim 1,
The housing,
A cylindrical housing body through which the top and bottom are passed, and
An annular circular frame disposed inside the upper end of the housing body and having a diameter corresponding to the bobbin, and a plurality of connecting bodies connecting the upper end of the housing body and the circular frame, the bobbin Panel excitation type speaker, characterized in that the upper end is combined. The method of claim 1,
In the upper damper,
A metal thin plate layer having a shape corresponding to the upper damper and attached to one surface of the upper damper, wherein the voice coil is adhered to the metal thin plate layer, and an external electrical signal is transmitted through the metal thin plate layer. Panel excitation type speaker, characterized in that applied to.

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