KR100381440B1 - A vibration speaker - Google Patents

Abstract

The present invention is to provide a vibrating speaker that is capable of resonating the vibration member in the vertical direction by providing a signal input means for generating sound and vibration, respectively, to maximize the amount of vibration.

The vibrating speaker includes a case 10, a sounding vibration plate 20 having an outer end portion fixed to an upper end of the case 10, and a voice coil in which the upper end is fixed to the vibration plate 20 by winding in a cylindrical shape. And a yoke 42 attached to the magnet 41 to form a magnetic circuit, wherein the magnet 41 is polarized to the upper and lower parts of the N and S poles, and is provided at the bottom of the voice coil 30. The vibrating member 40 and the elastic member 50 for elastically supporting the vibrating member 40 to be vertically elevated between the vibrating member 40 and the case 10, and the vibrating member of the A single-phase vibration generating coil attached to the bottom surface of the case 10 to face the vibrating member 40 at a bottom thereof and vertically elevating the vibrating member 40 by interaction with the vibrating member 40 ( 60) so that when the high frequency signal is inputted, The high frequency current is applied through the switch coil 30 to vibrate the vibration plate 20 to generate sound, and when a low frequency signal is input, a low frequency current is applied through the vibration generating coil 60. The vibration member 40 is configured to allow vibration to be generated while lifting up and down.

Description

Vibration speaker {A vibration speaker}

The present invention relates to a vibrating speaker that is embedded in a portable communication device such as a mobile telephone or a pager and simultaneously performs a vibration function together with a speech function.

In general, a speaker is a voice device that outputs an electrical and electronically received voice signal or a pre-input bell or melody as human audible sound.

Such a speaker is usually used as a large voice means connected to an audio or amplifier to greatly amplify the volume, but is greatly used as a small voice means due to a large reduction in size.

In particular, a speaker applied to a small communication device such as a mobile phone or a pager is called a micro speaker because the size is innovatively small.

Meanwhile, since small communication devices such as mobile phones and pagers are becoming smaller, micro speakers are also being reduced in size and thickness in order to cope with them.

FIG. 1 illustrates an example of a micro speaker that is mainly used in a portable communication device. The speaker is largely a case 1, a magnet 2, a voice coil 3, and a vibration plate built into the case 1. It is made as (4).

In the speaker, while the high frequency current is applied to the voice coil 3 through a lead wire from the outside, the voice coil 3 moves up and down by a magnetic field formed by the interaction between the voice coil 3 and the magnet 2. The shaking plate 4 to which one end of the coil 3 is attached vibrates finely and generates sound.

More specifically, since the high frequency current applied to the voice coil 3 through the lead wire is alternating current, the magnetic field generated by the voice coil 3 in accordance with the direction of the current applied to the voice coil 3 is the magnet 2. When formed in the same direction as the magnetic field formed by the magnetic force generated between the magnet 2 and the voice coil 3 to each other is generated, the voice coil 3 is moved downward to the magnet (2) side.

On the contrary, when the magnetic field generated by the voice coil 3 is formed in the opposite direction to the magnetic force formed by the magnet 3, the repulsive force that pushes each other between the magnet 2 and the voice coil 3 is generated. The voice coil 3 is pushed upward from the magnet 2.

As the voice coil 3 is raised and lowered according to the change of the magnetic field applied to the voice coil 3, the vibration plate 4 attached to the voice coil 3 is vibrated up and down, and the sound is emitted to the outside. It will be generated to perform the vocal function.

On the other hand, the portable communication device is equipped with the above-described speaker and at the same time to be provided with a vibration means for knowing the reception alarm by the vibration rather than the sound in consideration of the people around, the most commonly used as such vibration means It is a motor.

However, in recent years, as described above, miniaturization and thinning of communication devices are inevitably required, and each component embedded in these communication devices must also correspond thereto.

To this end, recently proposed is a vibrating speaker imparting a vibration function to the speaker, the representative examples are Japanese Patent Application Laid-Open Nos. 10-14195, 10-117472 and 10-229596.

As described in the above-described prior application inventions, as shown in FIGS. 2 to 4, all of them generate sound or cause vibration by the action of selectively applying a high frequency current or a low frequency current to the voice coil 1.

That is, in FIG. 2, sound or vibration is caused by the vibration width of the vibration plate 4 to which one end of the voice coil 1 is attached according to the frequency of the current applied to the voice coil 3. In FIG. 4, when the current applied to the voice coil 3 is high, the vibration plate 4 is shaken to generate sound, and when the low frequency current is applied, the magnet 2 is integrally attached to the vibration member 5. ) Vibrates and transmits it to the outer case so that vibration is detected.

In this way, in order for the current to be input only to the voice coil 3 to cause sound and vibration, the magnetic field generated in the voice coil 3 must be precisely considered.

In other words, in order to increase the amount of current flowing through the voice coil 3, the number of coil turns must be large. However, if the number of coil turns increases, the shaking width decreases as the weight of the shaking plate 4 to which the voice coil 3 is attached increases. The generation of sound is reduced.

On the contrary, when the number of turns of the voice coil 3 is reduced, the amount of vibration decreases while the vibration width of the vibration member 5 which resonates when the low frequency current is input decreases.

Therefore, in the above-described prior invention, since the voice coil 3 is wound based on the amplitude of the sound generated by the vibration plate 4, the amount of vibration in the low frequency band is lowered, and the output vibration sensitivity is not good. .

Meanwhile, in order to solve this disadvantage, the applicant has proposed Korean Patent Application Nos. 98-23812 to 98-23815 and 98-22244 and 98-22659, and in this prior application, the applicant has a high frequency current input. It was provided separately from the coil to be input and the low frequency current input.

That is, the high frequency current applied to generate the sound by shaking the vibration plate is applied to the voice coil attached to the vibration plate, and the low frequency current for generating vibration is applied to the vibration coil separately provided at the bottom of the vibration member. Therefore, the maximum amount of supply current in the low frequency band is to maximize the vibration force.

However, the present invention has a problem that the vibration member provided on the upper side is caused by the current is applied to the vibration coil while the vibration is induced, so that the vibration amount through the vibration member is not large enough to be detected from the outside. .

In other words, if the vibrating member vibrates by the seesaw action, the vibrating member moves in a direction corresponding to each other, so that the weight cannot be used as much as possible. It causes the reduction.

The main object of the present invention is to provide a signal input means for generating sound and vibration, respectively, so that the vibration member can be resonated in the vertical direction to maximize the amount of vibration.

1 is a side cross-sectional view showing a conventional micro speaker,

2 to 4 is a side cross-sectional view showing a conventional vibration speaker,

Figure 5 is a side cross-sectional view showing an embodiment of a vibration speaker according to the present invention,

Figure 6 is a side cross-sectional view showing another embodiment of the case in the vibration speaker of Figure 5,

7 is a side cross-sectional view showing another embodiment of the yoke in the vibrating member of FIG. 5;

8 is a side cross-sectional view showing a state in which a mass chain weight is coupled to the vibration member of FIG. 5;

9 is a side cross-sectional view showing another embodiment of a vibration member in the vibration speaker of FIG.

10 is a side cross-sectional view showing another embodiment of the elastic member in the vibration speaker of FIG.

11 is a side cross-sectional view showing an operating state when a high frequency signal is applied to the vibration speaker of the present invention;

12 is a side cross-sectional view showing an operating state when a low frequency signal is applied to the vibration speaker of the present invention;

Figure 13 is a side cross-sectional view showing another embodiment of a vibration speaker according to the present invention,

Figure 14 is a side cross-sectional view showing another embodiment of a vibration speaker according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10 case 11 acoustic emission hole

20: shaking plate 30: voice coil

40: vibration member 41: magnet

41a: first magnet 41b: second magnet

42: York 42a: First York

42b: second yoke 42b ': through hole

43: weight 50: elastic member

60: vibration generating coil

In order to achieve the above object, the present invention provides a case, a vibration generating plate for fixing the outer end at the top of the case, a cylindrical voice coil having a top end fixed to the bottom of the shaking plate, and the bottom of the voice coil The vibration member is vertically polarized by the magnet and the yoke attached to the magnet and the yoke constituting the magnetic circuit are integrally coupled, and the vibration member is attached to the bottom surface of the case at the bottom of the vibration member and the vibration member is The vibration coil wound in a single phase so as to resonate with the vibration member, and the vibration member and the case is connected to be made as an elastic member to elastically support the vibration member.

Hereinafter, a vibration speaker according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 5, the present invention includes a cylindrical case 10 surrounding the outside, a vibration plate 20, a voice coil 30 for generating sound, a vibration member 40, and an elastic member 50 in the case 10. And a coil 60 for vibration generation.

The case 10 is a cylindrical member having a hollow interior, and is usually covered with a cover having a sound emission hole formed thereon.

Such a case 10 has one or more acoustic emission holes 11 formed on the lower surface side thereof in order to smoothly transmit the vibration sound inside the case 10 to the outside as shown in FIG. 6. The position of the hole 11 is not limited to the lower surface of the case 10 and can be applied to various positions.

The shaking plate 20 is a member of the thin plate that generates sound while the plate surface vibrates up and down, and the outer end portion is fixed to the upper end of the case 10.

The voice coil 30 is a configuration in which a coil is wound in a cylindrical shape. The voice coil 30 is usually wound on a bobbin, and the upper end of the bobbin is mostly attached to the bottom of the vibration plate 20, and the voice coil 30 ), A high frequency alternating current, which is an audible frequency band, is applied.

This configuration is the same as the structure of a speaker that generates sound by using a conventional voice coil.

However, the present invention is characterized in that the vibration member 40 is provided at the bottom of the voice coil 30 so that the vibration generating coil 60 is provided at the same time.

The vibrating member 40 is composed of a yoke 42 attached to the magnet 41 together with the magnet 41. At this time, the magnet 41 is polarized N and S poles up and down, and the magnet 41 The yoke 42 is attached to at least one polar surface thereof so that the magnetic circuit passing through the magnet 41 and the voice coil 30 is configured.

That is, the vibrating member 40 is provided with a first yoke 42a and a second yoke 42b on an upper surface and a lower surface of one magnet 41 as shown in FIG. 5, but the first yoke 42a on the upper side thereof. ) Is formed to a diameter smaller than the inner diameter of the voice coil 30 so that a portion is inserted into the inner diameter of the lower end side of the voice coil 30, the lower second yoke 42b is larger than the inner diameter of the voice coil 30 The outer end portion of the outer end portion is bent upwardly while being formed to have a diameter, and the extended end portion thereof is spaced apart from the outer diameter surface of the voice coil 30 at a predetermined interval.

Here, the second yoke 42b is preferably formed with a through hole 42b 'having a predetermined size so that the magnetic force of the magnet 41 acts smoothly in the lower portion as shown in FIG. The through hole 42b 'is for increasing the interaction with the vibration generating coil 60 to be described later.

In addition, in the above configuration, the magnet 41 has the first magnet 41a and the second magnet 41b attached to the upper and lower surfaces thereof, respectively, based on the lower second yoke 42b as shown in FIG. 9. It is also possible to implement the configuration to make it possible, it is most preferable that the first magnet (41a) and the second magnet (41b) at this time to the state that the poles are the same position.

Therefore, the vibrating member 40 is spaced apart from the voice coil 30 by a predetermined interval by the yoke 42 and the vibrating member 40 is in a state floating in the air in the case 10. ) To be connected as a separate elastic member (50).

At this time, the elastic member 50 may be connected to the vibration member 40 and the side of the case 10, it may be connected to the bottom surface of the case 10 as shown in FIG.

Here, since the above-mentioned vibration member 40 is supported by the elastic member 50, it is preferable to include a mass of a predetermined size in order to increase the amplitude size according to the vibration. In the present invention, shown in FIG. As described above, an embodiment in which a ring-shaped weight 43 is coupled to the circumference of the second yoke 42b is provided. This weight 43 is preferably molded of a material that is not affected by the magnetic flux.

On the other hand, the vibration generating coil 60 is a single-phase winding coil which is spaced apart from the bottom of the vibration member 40 at predetermined intervals and attached to the bottom of the case 10. The vibration generating coil 60 at this time has a low frequency current. Is applied.

The vibration generating coil 60 can be widely formed on the bottom surface of the case 10, and is configured to be wound so that a magnetic field is formed only in one direction when energized.

As described above, in the vibrating speaker having the configuration, the sound generating signal is applied to the voice coil 30, and the vibration generating signal is applied to the vibration generating coil 60, thereby maximizing sound and vibration performance. To ensure that

That is, when a signal input from the outside is a signal for sound generation, as shown in FIG. 11, a high frequency current is applied to the voice coil 30, and the state is energized. The magnetic field generated at this time and the vibration member provided at the bottom of the voice coil 30 are provided. By the interaction between the magnetic field formed by the magnet 41 and the yoke 42 of 40, the action of pulling or pushing the voice coil 30 is performed very quickly.

As a result, the vibration plate 20 to which the voice coil 30 is attached vibrates violently and generates sound.

On the other hand, when the signal input from the outside is a vibration generating signal as shown in Figure 12 is a low frequency current is applied to the vibration generating coil 60 is energized while the magnetic field is also generated magnet 41 of the vibration member 40 By virtue of the interaction between the magnetic field formed by the yoke 42 and the vibrating member 40, the vibrating member 40 is pulled or pushed in a vertical direction very quickly.

In particular, since the vibration generating coil 60 is formed very widely at the bottom of the case 10, the magnetic field formed in the vibration generating coil 60 is more powerful than the magnetic field formed by the voice coil 30. It is possible.

In addition, since the vibration generating coil 60 is formed in a single phase, it exhibits only one polarity as a whole. However, since the current flowing through the vibration generating coil 60 is alternating current, the N and S polarities are continuously crossed.

Therefore, when the N and S polarities are continuously crossed from the vibration generating coil 60 with respect to the vibration member 40 showing only one polarity by the magnet 41, the vibration member 40 and the vibration generating coil ( 60 repeats the action of pulling or pushing each other.

On the other hand, the vibration generating coil 60 is attached to the bottom surface of the case 10, and as a result, the vibrating member 40 provided to be able to flow is moved up and down, and the vibration force of the vibrating member 40 is the case 10 And is transmitted through the elastic member 50 is connected to the vibration signal can be sufficiently detected from the outside.

13 shows another embodiment according to the present invention, in which the vibrating member 40 in this embodiment has one magnet 41 and a first yoke 42a at the top and bottom of the magnet 41, respectively. And the second yoke 42b are configured as described above.

However, while the magnet 41 is formed in a ring or donut shape, the first yoke 42a attached to the upper surface of the magnet 41 is formed to have a size larger than that of the voice coil 30 so as to be smaller than the voice coil 30. The second yoke 42b attached to the lower surface of the magnet 41 may be maintained at a predetermined interval and spaced apart from the inner portion of the voice coil 30 to protrude upward. While partially inserted into an inner diameter portion of the lower end side of the voice coil 30, the voice coil 30 is maintained at a predetermined interval from the voice coil 30.

In addition, a separate ring-shaped support member 70 having a predetermined height is attached to an outer end portion of the upper surface of the magnet 41 to attach the voice coil 30 to the upper end of the support plate 70. It is characterized in that the outer end is fixedly connected.

Even in such a configuration, the vibration member 40 is elastically supported from the case 10 by the elastic member 50, the bottom portion is to be attached to the vibration generating coil 60 as in the above embodiment, In particular, the bottom surface of the lower yoke 42 of the vibration member 40 facing the vibration generating coil 60 is to be attached to a separate magnet 41 having the same polar direction as the magnet 41 attached to the upper side. You may.

In this embodiment, when the signal input from the outside is a signal for sound generation, a high frequency current is applied to the voice coil 30, and when the input signal is a signal for vibration generation, a low frequency current is applied to the vibration generation coil 60. Same as in the above embodiment.

However, in the present embodiment, since the vibration plate 20 is provided together with the vibration member 40, the weight of the vibration member 40 is eventually increased, and thus a low frequency current is applied to the vibration generating coil 60 while the vibration member ( When the 40 is raised and lowered, the vibration amount of the vibration member 40 is further increased.

FIG. 14 shows another embodiment of the present invention. In the present embodiment, the same as those of the vibrating member 40 as the magnet 41 and the yoke 42 is performed in the aforementioned embodiments, but the magnet is the same. The first yoke 42a having an outer diameter smaller than the inner diameter of the voice coil 30 is attached to the upper surface 41, and the inner diameter of the case coil 10 on the same horizontal line as the first yoke 42a is the voice coil. The second yoke 42b having a larger inner diameter than the outer diameter of 30 is attached.

At this time, a separate ring-shaped support member 70 is attached to the outer end of the upper surface of the second yoke 42b provided outside of the voice coil 30, and the voice coil 30 is attached to the support member 70. It is characterized in that the outer end of the shaking plate 20 is firmly connected.

On the other hand, in the present embodiment, the vibration member 40 is elastically supported from the case 10 by the elastic member 50, and the bottom thereof is attached to the vibration generating coil 60 as in the previous embodiment. .

However, in the present embodiment, the magnet 41 to which the first yoke 42a is attached is directly aligned with the coil 60 for vibration generation while keeping the first yoke 42a and the second yoke 42b on the same horizontal line. It is face to face.

This configuration has the advantage of making the thickness of the vibrating member 40 more thin, and thus, the overall thickness of the vibrating speaker may be further thinned.

On the other hand, in the present embodiment, as described above, a high frequency current is applied to the voice coil 30 when the signal input from the outside is a sound generation signal, and a low frequency current is applied to the vibration generation coil 60 when the input signal is a vibration generation signal. Is applied.

Therefore, while the high frequency current is applied to the voice coil 30, the vibration of the shaking plate 20 while moving up and down by the interaction with the vibration member 40 to generate a sound, the low frequency current is the vibration generating coil 60 When applied to the vibrating member 40 by raising and lowering the vibration member 40 by the interaction with the vibration member 40 so that a larger vibration force is transmitted through the case 10.

The vibration speaker according to the present invention constructed and operated as described above generates a sound or vibration by the current applied to the voice coil and the vibration generating coil, respectively, in accordance with a signal input from the outside, and particularly the vibration generating coil. Formed under the magnet of the vibration member has the greatest advantage in maximizing the interaction force with the vibration member.

In addition, when the vibration member is vertically lifted by the increased action force, the vibration member can exert a greater vibration force than when the vibration member acts as a seesaw as in the present invention.

Therefore, the present invention maximizes the sound and vibration performance by a simple structure improvement to maximize the mutual large area with the vibration member while forming the vibration generating coil in a single phase, greatly improving the reliability of the product and at the same time thinning the product Can be promoted.

Claims (9)

A case; An oscillation plate for sound generation having an outer end fixed to an upper end of the case; A voice coil wound in a cylindrical shape and having an upper end fixed to the shaking plate; A vibration member provided at a bottom of the voice coil, comprising a magnet having N and S poles polarized to an upper portion and a lower portion, and a yoke attached to the magnet to form a magnetic circuit; An elastic member elastically supporting the vibrating member to be vertically lifted between the vibrating member and the case; A single-phase vibration generating coil attached to a bottom surface of the case to face the vibration member at the bottom of the vibration member and vertically lifting the vibration member by interaction with the vibration member; Vibration speaker, characterized in that consisting of. The vibrating speaker of claim 1, wherein the case has a plurality of sound emitting holes having a predetermined size on one side thereof. The vibration member of claim 1, wherein the first yoke and the second yoke are attached to the upper and lower surfaces of the magnet, and the first yoke attached to the upper surface of the magnet is smaller than the inner diameter of the voice coil. The second yoke is inserted into the lower portion of the voice coil to have a small outer diameter, and the second yoke attached to the lower surface of the magnet is positioned on the same horizontal line as the outer end of the first yoke while the outer end is bent upward. Vibration speaker which becomes a magnetic circuit. The vibrating speaker of claim 3, wherein the second yoke has a through hole of a predetermined size formed on one side thereof to increase a leakage flux of the magnet. 4. The vibration member of claim 3, wherein the vibrating member includes a first magnet configured to polarize the upper and lower poles between the first yoke and the second yoke, and is attached to a bottom surface of the first magnet. The second speaker having the same polarization structure as that of the first magnet is attached to the bottom of the two yoke so that the second magnet is face-to-face and interact with the vibration generating coil attached to the bottom of the case . The vibration speaker according to any one of claims 1 to 3, wherein the vibration member is provided with a weight having a predetermined mass on an outer surface thereof. A case; Ring-shaped magnets in which the N and S poles are polarized in the upper and lower portions, a first yoke in which the center penetrates vertically and is attached to the upper surface of the magnet, and an outer circumferential surface thereof is attached to the bottom surface of the magnet. Vibration constituting the magnetic circuit while the second yoke is provided so as to protrude upward to have an outer diameter spaced apart from the inner diameter surface of the one yoke at a predetermined interval so that the protruded upper end is located on the same horizontal plane as the inner diameter surface of the first yoke. Absence; A ring-shaped support member attached to an outer end of an upper surface of the first yoke of the vibration member; A vibration generating plate having an outer end attached to the support member; The upper end is fixed to the vibration plate is wound in a cylindrical shape, the outer circumferential surface of the lower end face the inner diameter surface of the first yoke, and the inner circumferential surface of the lower end face voice coil facing the outer circumferential surface of the upwardly protruding end of the second yoke; ; An elastic member elastically supporting the vibrating member to be vertically lifted between the vibrating member and the case; A single-phase vibration generating coil attached to a bottom surface of the case to face the vibration member at the bottom of the vibration member and vertically lifting the vibration member by interaction with the vibration member; Vibration speaker, characterized in that consisting of. 5. The vibration device of claim 4, wherein the vibrating member includes a first magnet configured to polarize the N and S poles between the first yoke and the second yoke so as to be polarized upward and downward, and is attached to a bottom surface of the first magnet. The second speaker having the same polarization structure as that of the first magnet is attached to the bottom of the two yoke so that the second magnet is face-to-face and interact with the vibration generating coil attached to the bottom of the case . A case; Ring-shaped magnets in which the N and S poles are polarized to the upper and lower portions, the first yoke attached to the upper surface of the magnet, and the inner diameter surfaces facing each other at a predetermined distance from the outer diameter surface of the first yoke. A second yoke having an outer end attached to an upper end of the case, the vibration member constituting a magnetic circuit; A ring-shaped support member attached to an outer end portion of the upper surface of the second yoke of the vibration member; A vibration generating plate having an outer end attached to the support member; A coil wound around the upper surface to be fixed to the vibration plate, the outer circumferential surface of the lower end of the lower surface facing the inner diameter surface of the second yoke, and the inner circumferential surface of the lower end facing the outer circumferential surface of the first yoke; An elastic member elastically supporting the vibrating member to be vertically lifted between the vibrating member and the case; A single-phase vibration generating coil attached to a bottom surface of the case to face the vibration member at the bottom of the vibration member and vertically lifting the vibration member by interaction with the vibration member; Vibration speaker, characterized in that consisting of.