KR102226192B1 - Panel excitation type speaker - Google Patents

Abstract

The present invention relates to a panel vibrating speaker, and more particularly, to a panel vibrating speaker which is attached to a panel and plays sound by vibrating the panel. The panel vibrating speaker comprises: a frame having a first hole; an upper plate fixedly installed around the first hole and having a ring shape provided with a second hole in the center; a yoke which is fixedly installed on the bottom surface of the upper plate and accommodates a permanent magnet generating magnetic flux therein; a center pole fixed to the upper part of the permanent magnet and inserted into the second hole of the upper plate to form a magnetic gap with the upper plate; a voice coil positioned in the magnetic gap and wound on a bobbin; and a damper in which the upper end of the bobbin is fixed to the bottom surface in a state supported by the center pole. The damper is attached to the panel and configured to transmit vibrations of the bobbin to the panel in the panel vibrating speaker.

Description

Panel excitation type speaker

The present invention relates to a panel excitation type speaker, and more particularly, to a panel excitation type speaker having excellent sound quality reproduction ability because it can implement fine wavelengths.

A speaker is an acoustic 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 generator, 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 the sound is reproduced from the panel on which the image is displayed, the three-dimensional effect of the 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 installed on the panel P, the frame 10, and 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 is a voice It includes a coil 31 and a damper 35. In addition, 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. Further, 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. Reproduces 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 circumferential 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.

In the conventional technology, the damper 35 is configured to fix the central portion of the bobbin 31a, and this damper is attached to the frame 10 and installed. In this way, as the damper 35 is attached and installed on the frame, the minute vibration transmitted to the damper through the bobbin 31a cannot be transmitted to the panel but is transmitted to the frame, which causes the sound to not be accurately implemented. .

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

The present invention has been created in order 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 because it can implement fine wavelengths.

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 by vibrating the panel,

A frame provided with a first hole;

An upper plate fixedly installed around the first hole and having a ring shape in which a second hole is provided in the center;

A yoke fixedly installed on the bottom of the upper plate and accommodated therein with a permanent magnet generating magnetic flux therein;

A center pole fixed on the 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;

A voice coil positioned in the magnetic gap and wound around a bobbin; And

Including a damper in which an upper end of the bobbin is fixed to a bottom surface while being supported by the center pole,

The damper is attached to the panel and configured to transmit the vibration of the bobbin to the panel.

In the panel excitation type speaker,

The center of the damper is fixedly installed on the upper part of the center pole, and the upper end of the damper may be attached to the lower surface of the panel.

In the panel excitation type speaker,

The damper may include a ring-shaped outer frame, a central portion disposed inside the outer frame and having a fixing hole formed at the center thereof, and a connection portion connecting the outer frame and the central portion and made of an elastic material.

In the panel excitation type speaker,

A binding member is provided between the damper and the center pole,

The binding member includes a fixed body fixed to the center pole, and a protrusion protruding upward from an upper surface of the fixed body and fitted into the fixing hole to be fixed,

The damper may be fixed to the center pole by a binding member.

In the panel excitation type speaker,

Since the fixed body has an outer diameter smaller than the central portion of the damper, the vertical vibration of the outer frame may not be inhibited.

In the panel excitation type speaker according to the present invention, since a damper supporting the bobbin is directly attached to the panel, the vibration of the bobbin can be immediately transmitted to the panel, and thus a fine wavelength can be realized, thereby improving sound quality reproducibility.

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 perspective view of the combination 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;
Figure 6 is an exploded perspective view of one configuration of the panel excitation type speaker of Figure 2;
7 is a sectional view of FIG. 3 VII-VII.

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 specific descriptions 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, unless otherwise defined. All terms used in the present disclosure are selected for the purpose of more clearly describing the present disclosure, and are not selected to limit the scope of the rights according to the present disclosure.

Expressions such as "comprising", "having", "having" and the like 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 denoted with 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 attached to the panel P to reproduce sound by vibrating the panel P. At this time, any panel may be formed as long as a flat panel such as an image display or a picture frame is formed.

The panel excitation type speaker 100 includes a frame 110, an upper plate 120, a yoke 130, a center pole 140, a voice coil 150, a damper 160, and a binding member 170. It is composed of.

The frame 110 is provided with a first hole 111 and is attached to a structure other than a panel to perform a function of supporting the speaker as a whole.

The frame 110 has a shape of a square plate as a whole, and bolt holes 112 into which fixing bolts for attaching to the structure are inserted are formed at both edges, and a first hole 111 is formed in the center thereof. It will become. Further, at one side of the frame 110, a signal line to which an external signal is applied is connected to one end, and a terminal 113 to which the voice coil 150 is connected to the other end is formed.

The upper plate 120 is fixedly installed around the first hole 111 and has a ring shape in which a second hole 121 is provided in the center. The upper plate 120 is installed at the periphery of the first hole 111, and a second hole 121 is formed in the center thereof, so that between the inner surface of the second hole 121 and the center pole 140 A magnetic gap G is formed in the.

This upper plate 120 is a structure constituting a magnetic circuit that induces the direction of the magnetic force magnetized by the permanent magnet 131.

The yoke 130 is fixedly installed on the bottom surface of the upper plate 120 and a permanent magnet 131 generating magnetic flux is accommodated therein. Specifically, the yoke 130 provides a magnetic path for the magnetic flux generated by the permanent magnet 131, and has a shape in which an rim protrudes upward from the disk to provide an accommodation space therein. A disk-shaped permanent magnet 131 is provided in the receiving space of the yoke 130.

The edge of the yoke 130 is coupled to and fixed to the lower surface of the upper plate 120 so that it is supported by the upper plate 120 and connected to the upper plate 120 to provide a magnetic path together with the upper plate 120 It is done.

The permanent magnet 131 provided inside the yoke 130 is a ferrite magnet having N-pole and S-pole magnetic poles formed at both end surfaces in the axial direction. These magnets are attached to and fixed to the bottom of the yoke 130 by an adhesive or the like. However, the permanent magnet 131 need not be a ferrite magnet. For example, instead of a ferrite magnet, an Alnico magnet, a neodymium magnet, or the like can be employed.

The center pole 140 is fixed to the upper portion of the permanent magnet 131 and is inserted into the second hole 121 of the upper plate 120 to form a magnetic gap between the upper plate 120 and the upper plate 120.

Specifically, the center pole 140 has a disk shape corresponding to the permanent magnet 131, and its outer surface is formed to face the inner circumferential surface of the second hole 121 of the upper plate 120, and therebetween A gap is provided.

The center pole 140 is attached to the upper portion of the permanent magnet 131.

In the upper center of the center pole 140, a coupling groove 141 for coupling a coupling member 170 for fixing the damper 160 is formed.

The voice coil 150 is positioned in the magnetic gap and wound around the bobbin 151. Specifically, the voice coil 150 is formed with an insulating layer coated on the surface of the copper wire on the outer peripheral surface of one end side of the substantially cylindrical bobbin 151 in the axial direction.

In the speaker as described above, when a current is input to the voice coil 150, a driving force (Lorentz force) acts on the voice coil 150 within the magnetic gap according to Fleming's left-hand rule, and the panel is moved in the axial direction of the speaker. Sound waves are emitted by vibrating. In addition, the upper plate 120, the permanent magnet 131, the yoke 130, and the center pole 140 constituting the magnetic circuit are constantly mixed with a (+) potential or a (-) potential. Then, due to the vibration of the voice coil 150, magnetic fluctuation occurs, 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, that is, in a direction perpendicular to the axial direction of the speaker.

The damper 160 has an upper end of the bobbin 151 fixed to a bottom surface while being supported by the pole plate. The damper 160 supports the bobbin 151 and supports the bobbin 151 to move up and down.

Such a damper 160, the damper 160 is a ring-shaped outer frame 161, a central portion 162 disposed inside the outer frame 161 and a fixing hole 1621 formed in the center, It connects the outer frame 161 and the central part 162 and includes a connection part 163 made of an elastic material.

The outer frame 161 is formed in a circular ring shape. The upper surface of the outer frame 161 is fixedly attached to the panel by an adhesive tape 180. In addition, the upper end of the bobbin 151 is attached to the lower surface of the outer frame 161.

The central portion 162 is disposed inside the ring-shaped outer frame 161, a space is provided therebetween, and a fixing hole 1621 is formed in the center. This central portion 162 as a whole has a circular plate shape. This central portion 162 is configured to be supported by being fixed to the center pole 140 through the binding member 170.

The connection part 163 connects the outer frame 161 and the central part 162 and is made of an elastically deformable material.

As a result, the damper 160 supports the bobbin 151 and simultaneously supports the bobbin 151 by attaching the upper surface of the outer frame 161 to the panel and connecting the lower surface to the bobbin 151 while the central part 162 is supported by the center pole. The vibration transmitted by 151 is immediately transmitted to the panel.

The binding member 170 performs a function of fixing the damper 160 to the center pole 140 and is disposed between the damper 160 and the pole plate.

This fixed body 171 includes a fixed body 171 and a protrusion 172.

The fixed body 171 is formed in a disk shape, and is configured to have an outer diameter smaller than that of the central portion 162. The fixed body 171 has the protrusion 172 formed on the upper surface, and a coupling part for being fitted and coupled to the center pole 140 is also provided on the lower surface.

Since the fixed body 171 has a predetermined thickness, it does not inhibit the damper 160 from vibrating around the central part 162. The outer frame 161 and the connection part 163 are separated from the center pole 140 by the fixed body 171, so the connection part 163 and the outer frame 161 accurately vibrate without contacting the center pole 140. It will be configured to be able to do it.

The protrusion 172, as protruding from the center of the upper surface of the fixing body 171, is fitted and coupled to the fixing hole 1621 provided in the central portion 162 of the damper 160. These protrusions 172 are forcibly fitted into the fixing holes 1621 and coupled, so that the damper 160 is firmly fixed to the center pole 140.

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 150, the voice coil and bobbin 151 located in the magnetic gap vibrate vertically, and the vibration is immediately transmitted to the panel through the damper 160. In particular, since the damper 160 supporting the bobbin 151 is directly attached to the panel, even minute vibrations are immediately transmitted to the panel, so that sound can be accurately implemented.

In addition, the center of the damper 160 is configured to support the panel and the bobbin 151 while the outer frame 161 is supported by the center pole 140, so that the signal generated by the vibration of the bobbin 151 is effectively Make it possible to deliver to the panel.

In addition, in the present invention, a binding member 170 is provided between the center pole 140 and the damper 160, and the binding member 170 is spaced apart from the center pole 140 and the damper 160 at a predetermined interval. Therefore, there is an advantage of being able to firmly support the center of the damper 160 without disturbing the vibration of the damper 160.

Although the present invention has been described in detail with reference to a preferred embodiment 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...speaker 110...frame
111...first hole 112...bolt hole
113...terminal 120...top plate
121...second hole 130...yoke
131...Permanent magnet 140...Center pole
141...Mating groove 150...Voice coil
151...bobbin 160...damper
161...outer frame 162...central part
1621...Fixed hole 163...Connection
170...binding member 171...fixing body
172...protrusion 180...tape

Claims (5)

In the panel excitation type speaker attached to the panel to reproduce sound by vibrating the panel,
A frame provided with a first hole;
An upper plate fixedly installed around the first hole and having a ring shape in which a second hole is provided in the center;
A yoke fixedly installed on the bottom of the upper plate and receiving a permanent magnet generating magnetic flux therein;
A center pole fixed on the 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;
A voice coil positioned in the magnetic gap and wound around a bobbin; And
Including a damper in which the upper end of the bobbin is fixed to a bottom surface while being supported by the center pole,
The damper is attached to the panel and configured to transmit the vibration of the bobbin to the panel,
The damper includes a ring-shaped outer frame, a central portion disposed inside the outer frame, and a connection portion connecting the outer frame and the central portion and made of an elastic material, and the lower surface of the central portion of the damper is on the upper end of the bobbin. Panel excitation type speaker, characterized in that fixed. The method of claim 1,
The center of the damper is fixed to the upper portion of the center pole, the upper end of the damper is a panel excitation type speaker, characterized in that attached to the lower surface of the panel. The method of claim 2,
Panel excitation type speaker, characterized in that a fixing hole is formed in the central portion of the damper. The method of claim 3,
A binding member is provided between the damper and the center pole,
The binding member includes a fixed body fixed to the center pole, and a protrusion protruding upward from an upper surface of the fixed body and fitted into the fixing hole to be fixed,
The damper is a panel excitation type speaker, characterized in that fixed to the center pole by a binding member. The method of claim 4,
The fixed body has an outer diameter smaller than the central portion of the damper, so that the vertical vibration of the outer frame is not inhibited.

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