KR200404313Y1 - Speaker - Google Patents

Abstract

Speaker according to the present invention, and a magnet to form a magnetic field; A first plate and a second plate extending in a symmetrical structure in an upward direction from both sides of the N pole and the S pole of the magnet to form a predetermined vibration space therebetween; A voice coil positioned on the vibration space at the top of the magnet and causing mutual magnetic interference with a magnetic field formed on the vibration space to generate a vibration force; A diaphragm positioned above the voice coil to generate sound pressure; It characterized in that it comprises a drive rod for transmitting the vibration force by connecting the voice coil and the diaphragm. Unlike the conventional method of driving the voice coil in a circular contact with the diaphragm, the speaker according to the present invention has both ends of the drive rod positioned at the upper end of the voice coil and the lower part of the diaphragm in a state where the voice coil is positioned transversely with respect to the diaphragm. By adopting a point driving method for transmitting the vibration force by connecting to each, the sensitivity of the diaphragm is improved, there is an effect that can generate a sound close to the natural sound. In addition, the diaphragm of the speaker according to the present invention is a structure in which a thin metal plate is simply adhered to a resin film, unlike the conventional diaphragm having to design a diaphragm in consideration of a change in sound quality due to the diaphragm pattern, the fabrication of the speaker has a simple advantage. .

Description

Speaker {SPEAKER}

The present invention relates to a loudspeaker, and more particularly to a loudspeaker capable of reproducing a sound close to natural sound by performing a point driving by transmitting the vibration driving force induced by the diaphragm and the lateral vibration voice coil to the aluminum diaphragm as a drive rod as a whole. will be.

1 is a cross-sectional view showing the internal structure of a conventional speaker.

As shown therein, the conventional speaker 1 includes a magnet 11, a pole piece 12, a lower plate 13, a first upper plate 14 and a second upper plate 15, a voice coil 16, The diaphragm 17, the frame 18, etc. are comprised.

The main components of the speaker 1 configured as described above will be described below.

The magnet 11 is cylindrical and is provided to form a magnetic field on a predetermined vibration space A. The pole piece 12 is provided in a cylindrical shape and disposed inside the magnet 11. The lower plate 13 is attached to the bottom surface of the magnet 11 to induce magnetic flux from the magnet 11 to the pole piece 12. The first top plate 14 is attached to the top surface of the magnet 11 in a donut shape, and the second top plate 15 is attached to the top surface of the pole piece 12 in a disc shape.

By such a structure, a long-term field in which magnetic flux is induced and concentrated is formed between the first upper plate 14 and the second upper plate 15, and the space in which the magnetic flux is induced and defined as the vibration space A described above. .

On the other hand, the voice coil 16 is a cylindrical shape disposed on the vibration space (A), and forms a magnetic field in accordance with the input electrical signal, the magnetic field formed on the vibration space (A) by the magnet 11 and Up and down vibration force is generated by mutual magnetic interference.

The diaphragm 17 has an outer circumference fixedly supported by the frame 18, and an inner circumference is attached to an upper end of the voice coil 16 to vibrate in synchronization with the vibration of the voice coil 16 to generate sound pressure. Generate. The frame 18 supports each of the above components to be integrated.

However, in the conventional speaker 1 as described above, since the inner circumference of the diaphragm 17 is directly attached to the upper end of the voice coil 16, the vibration force of the voice coil 16 is effective at each point of the diaphragm 17. Since the diaphragm 17 is configured to prevent unidirectional vibrations, that is, divided vibrations, etc., so-called coagulation has to design and shape an elongated groove, which makes the work process difficult, resulting in poor molding or manufacturing of the diaphragm 17. There is a problem that a defect may occur. In addition, since the circular coil is attached to the inner circumference of the diaphragm, the driving force acting on the current flowing through the coil is not uniform because of the uneven magnetic field or the center settling. There is a problem in that the distortion that generates noise is increased.

The present invention has been made to solve the above problems, the overall structure of the diaphragm is simple, the production of the diaphragm is easy to work and the sound contact performance is applied to the diaphragm in the lateral driving voice coil to apply the point contact driving force to the natural sound The purpose is to provide a speaker to have a.

A speaker according to the present invention for realizing the above object is a magnet to form a magnetic field; A first plate and a second plate extending in a symmetrical structure in an upward direction from both sides of the N pole and the S pole of the magnet to form a predetermined vibration space therebetween; A voice coil positioned on the vibration space at the top of the magnet and causing mutual magnetic interference with a magnetic field formed on the vibration space to generate a vibration force; A diaphragm positioned above the voice coil to generate sound pressure; It characterized in that it comprises a drive rod for transmitting the vibration force by connecting the voice coil and the diaphragm.

The magnet, the first plate and the second plate are inserted into and mounted inside the frame body having an open top structure, and the frame cover having sound holes is coupled to the upper portion of the frame body.

It is preferable that the said diaphragm is a structure which adhere | attached the metal thin plate along the inner periphery of the said film hollow part based on the resin film in which the hollow part was formed in the center part. Optionally, the outer periphery of the film is configured to be finished with a metal rim of brass or phosphor bronze.

The first plate and the second plate are made up of a vertical portion in close contact with the side of the magnet, and a horizontal portion extending from the upper end of the vertical portion in the direction of the relative plate, wherein the horizontal portion is tapered with both ends gradually narrowing toward the relative plate direction. It is preferable to have a structure.

It is preferable that the said diaphragm is provided with the some rib in the longitudinal direction.

The drive rod is formed of a multi-crank crank structure, the upper end and the lower end thereof are connected to the diaphragm and the voice coil, respectively, and the portion connected to the diaphragm and the voice coil is preferably formed in a 'c' shaped structure.

The drive rod is advantageously attached to the diaphragm by being biased opposite the sound hole.

Hereinafter, with reference to the accompanying drawings illustrating a preferred embodiment of the present invention.

Figure 2 is a partially cutaway perspective view of the speaker according to the present invention, Figure 3 is an exploded perspective view showing a speaker according to the present invention, Figure 4 is a cross-sectional view showing the internal configuration of the speaker according to the present invention.

2 to 4, the speaker according to the present invention, the box-shaped frame body 90 of which the top is open, and the inside of the frame cover 22 coupled to the upper portion of the frame body 90 do.

Here, an input line inlet 94 is formed at one side of the frame main body 90 so as to be connected to the voice coil 50 so as to pass a wire for transmitting an electrical voice signal, and the frame body 90 is opened. The sound hole 26 is formed at one side of the cover 22. The diaphragm 30 to be described later is inserted and mounted between the frame body 90 and the flange portions 92 and 24 of the frame cover 22.

Inside the frame body 90 and the frame cover 22 as described above, the magnet 80 for forming a magnetic field, and the left and right symmetrical types in the upward direction from both the N pole and the S pole (not shown) of the magnet 80. A first plate 60 and a second plate 70 extending in a structure to form a predetermined vibration space therebetween, and positioned on the vibration space above the magnet 80 and formed on the vibration space; A voice coil 50 generating a vibration force by causing magnetic field and mutual magnetic interference, a diaphragm 30 generating a sound pressure located above the voice coil 50, the voice coil 50 and the diaphragm 30 ) Is connected to the drive rod 40 to transmit the vibration force.

Referring to the main components of the speaker according to the present invention configured as described above are as follows.

The magnet 80 has a generally rectangular parallelepiped shape, and both sides of the magnet 80 in contact with the first plate 60 and the second plate 70 have an N pole and an S pole. And the upper surface of the magnet 80 is formed with an alignment line 82 of the groove structure for aligning the voice coil 50 in the manufacturing and use of the speaker, the upper portion of the voice coil 50 in the vertical direction A space for vibration is formed.

The first plate 60 and the second plate 70 are portions for inducing magnetic flux in the vibration space, and the shape of the first plate 60 and the second plate 70 is substantially '-' shaped. That is, the first plate 60 and the second plate 70 may be disposed at upper ends of the vertical parts 62 and 72, which are in close contact with the side surfaces of the magnet 80, and at the upper ends of the vertical parts 62 and 72. It is made of a horizontal portion 64, 74 extending in the plate direction, the horizontal portion 64, 74 preferably has a tapered structure in which both ends are gradually narrowed toward the counter plate direction. In such a tapered structure of the horizontal portion, the magnetic flux is concentrated to offset the effect of reducing the vibration width in the vertical direction of the coil due to the magnetic force generated at both ends of the coil (which acts to the side of the coil side to side). The efficiency can be improved.

The voice coil 50 is formed to extend in the front-rear direction along the length of the magnet 80, forms a magnetic field according to the input electrical signal to mutually interfere with the magnetic field formed by the magnet 80 up and down And generate vibration force.

The edge portion of the diaphragm 30 is fixed between the frame body 90 and the frame cover 22 at the upper portion of the voice coil 50. In this case, the fixing method may be fixed by a fastening member fastening the frame body 90 and the frame cover 22 through a fixing hole 36 and a fixing method by an adhesive member or the like.

The diaphragm 30 has a structure in which a metal thin plate of tens of microns is bonded along the circumference of the hollow part based on a resin film such as PET having a generally rectangular shape having a hollow part formed at the center thereof. As such a metal thin plate, aluminum which is lightweight and has a predetermined rigidity may be advantageously applied. The resin film located on the outer circumference of the metal sheet allows the metal sheet to be supported by the frame body 90 and the cover 22, and the metal sheet can easily vibrate up and down according to the vibration force transmitted from the drive rod 40. To provide a predetermined play.

Optionally, it is preferable to finish the outer circumference of the film with a metal frame of brass or phosphor bronze in order to prevent the signal from being distorted during sound reproduction due to wrinkles that may be formed on the outer circumference of the film. The metal frame constituting the edge of the diaphragm 30 is inserted and fixed between the frame body 90 and the frame cover 22.

The metal plate positioned at the center of the diaphragm 30 preferably uses aluminum that is anti-oxidized to ensure durability and reliability, and has a plurality of ribs 32 and 34 in the longitudinal direction so as to have a predetermined strength. Is formed. Referring to FIG. 6, both ribs 32 of the ribs 32 and 34 are convexly formed downwardly, and the middle rib 34 is convexly formed upwardly and is transmitted to the drive rod 40. To be transmitted evenly to the whole diaphragm 30, to prevent the split vibration.

The diaphragm 30 is positioned above the voice coil 50 to generate sound pressure while vibrating in cooperation with the vibration of the voice coil 50 transmitted through the drive rod 40.

As shown in FIG. 5, the drive rod 40 has a multi-cranked crank structure, and the upper and lower ends thereof are connected to the diaphragm 30 and the voice coil 50, respectively. The material of the drive rod 40 is not particularly limited as long as it is a material that is lightweight and can have high strength.

That is, the drive rod 40 includes a rod 42 vertically established between the diaphragm 30 and the voice coil 50, and the diaphragm 30 and the voice coil at upper and lower sides of the rod 42. It consists of connecting portions 44 and 46 respectively connected to 50. Here, the connection portions 44 and 46 are preferably formed in a '-' shape to facilitate the connection between the diaphragm 30 and the voice coil 50 and to increase the bonding area to secure the connection. .

In addition, the contact position of the drive rod 40 with the diaphragm 30 is generally left and right in the short axis direction of the diaphragm 30, but in the long axis direction toward the input line inlet 94, that is, opposite the sound hole 26. It is desirable to be in contact with each other. This requires a large force to vibrate the entire diaphragm 30 in the same way as the piston vibration, and if it requires a large magnetic force or current value, but if the drive contact point is biased to one side, the strength of vibration can be increased even with a small driving force. Therefore, it is advantageous to widen the entire range including the low range.

In addition, this point driving method is advantageous for the reproduction of sound close to the natural sound, and the natural sound means the sound reproduced as it is without adding or subtracting the original sound, and the diaphragm can vibrate in the same manner as the vibration electric signal. In the present invention, the driving force of the coil 50 placed laterally is used, but the diaphragm 30 and the drive rod 40 which are in point contact with each other are used, but the diaphragm 30 having a structure in which a small aluminum is attached to a thin film has a single vibration or division. By making the vibration uniform without vibration, the original sound can be reproduced without distortion of the electric signal.

On the other hand, the drive rod 40 is attached to the diaphragm 30 in the upper portion and fixed to the coil 50 attached to the magnet 50 in the bottom can be prevented from being separated and maintained stable.

7 is a reference view for explaining an operating state of the speaker according to the present invention. Referring to this, in the drawing, a magnetic field is formed in a direction that enters the ground, and a first plate 60 in contact with the N pole of the magnet 80 is disposed on one side, and the S pole of the magnet 80 is contacted on the opposite side. Second plate 70 is disposed.

In addition, in the drawing, the X mark means that the magnetic field is formed in the direction of entering the ground, and the degree of compactness of the X mark is assumed to mean the strength of the magnetic field at the corresponding point.

Therefore, a magnetic field of B1 having a strong magnetic field is formed in the upper portion of the voice coil 50, and a magnetic field of B2 having a weaker magnetic field than B1 is formed in the lower portion of the voice coil 50.

In other words, a magnetic field is generated at a portion where both ends of the plate face each other by the editing property of the magnetic field.

On the other hand, when the electrical signal is input to the voice coil 50, a current corresponding to the electrical signal flows in the voice coil 50, a magnetic field corresponding to the flow of the current is formed. Therefore, the magnetic field formed by the voice coil 50 causes interference with the magnetic field already formed on the vibration space between the magnet 80 and the first and second plates 60 and 70 to generate a magnetic force. This magnetic force follows Fleming's left-hand law.

In the drawing, the current I flows in the ① direction in the upper portion of the voice coil 50, and the current I flows in the ② direction in the lower portion of the voice coil 50. Therefore, the force received by the upper portion of the voice coil 50 receives the force of F1 proportional to B1, and the force received by the lower portion of the voice coil 50 receives the force of F2 proportional to B2.

However, since F1 is larger than F2, the voice coil 50 is ultimately subjected to a magnetic force in the direction of F1.

Therefore, the voice coil 50 vibrates in the up and down direction in a direction coinciding with the direction of the magnetic force F1 received from the upper portion of the voice coil 50, so that the vibration force faithful to the electrical signal input to the voice coil 50 is generated. As the vibration of the voice coil 50 is transmitted to the diaphragm 30 through the drive rod 40, the diaphragm 30 vibrates to generate sound pressure.

At this time, since the diaphragm 30 is connected only through the voice coil 50 and the drive rod 40, the diaphragm 30 is not directly contacted with the voice coil 50 so that the load of the coil is not added to the vibrator, and the diaphragm and drive Vibration portion composed of a part of the rod and the coil is light, so it is easy to drive even a small driving force, it is possible to generate a sound close to natural sound.

As mentioned above, although the preferred embodiment of the present invention has been described, the scope of the present invention is not limited to the above embodiment, and various modifications are possible without departing from the nature and essential features of the present invention. For example, the material of the voice coil in the preferred embodiment is not limited and may be implemented as a high elastic stainless steel wire (SUS) in addition to the usual copper material, if the material satisfies the light weight high strength in addition to the aluminum material described in the diaphragm It is not particularly limited. Such modifications and substitutions will be apparent to those skilled in the art. Accordingly, the embodiments described above are merely illustrative and not intended to have a limiting meaning, and the scope of the present invention should be understood to include the matters set forth in the appended claims and all modifications that may be understood therefrom. .

The speaker according to the present invention configured and operated as described above has an advantage in that the number of parts is reduced, the structure is simple, and the production is easy, and thus automatic production is also easy.

In particular, the speaker according to the present invention has the advantage that the natural vibration of the diaphragm is smoothly performed as the mass is not added to the coil, thereby improving the sound reproduction effect close to the natural sound by improving the sensitivity of the diaphragm.

1 is a cross-sectional view showing the internal structure of a conventional speaker,

2 is a partial cutaway perspective view of a speaker according to the present invention,

3 is an exploded perspective view showing a speaker according to the present invention,

4 is a cross-sectional view showing an internal configuration of a speaker according to the present invention;

5 is a view showing a drive rod of the speaker according to the present invention,

FIG. 6 is a cross-sectional view of the diaphragm viewed from the line A-A of FIG. 3;

7 is a reference view for explaining an operating state of the speaker according to the present invention.

<Explanation of symbols for main parts of the drawings>

20: speaker of the present invention 22: frame cover

26: sound hole 30: diaphragm

32, 34: Rib 40: Drive load

42: rod portion 44, 46: connection portion

50: voice coil 60, 70: first and second plate

80: voice coil 90: frame body

94: input line inlet

Claims (9)

A magnet forming a magnetic field; A first plate and a second plate extending in a symmetrical structure in an upward direction from both sides of the N pole and the S pole of the magnet to form a predetermined vibration space therebetween; A voice coil positioned on the vibration space at the top of the magnet and causing mutual magnetic interference with a magnetic field formed on the vibration space to generate a vibration force; A diaphragm positioned above the voice coil to generate sound pressure; Speaker comprising a drive rod for connecting the voice coil and the diaphragm to transmit a vibration force. The method according to claim 1, The magnet, the first plate and the second plate is inserted into the inside of the frame body of the structure of the upper opening is mounted, The upper portion of the frame body, the speaker characterized in that the frame cover with sound holes are coupled. The method according to claim 2, The diaphragm is a speaker having a structure in which a thin metal plate is bonded along an inner circumference of the hollow part of the film, based on a resin film having a hollow part in a central part thereof. The method according to claim 3, Speakers, characterized in that the outer periphery of the film is finished with a metal frame of brass or phosphor bronze. The method according to claim 1, The first plate and the second plate are made up of a vertical portion in close contact with the side of the magnet, and a horizontal portion extending from the upper end of the vertical portion in the direction of the relative plate, wherein the horizontal portion is tapered with both ends gradually narrowing toward the relative plate direction. Speaker having a structure. The method according to claim 1, The diaphragm is a speaker, characterized in that a plurality of ribs are formed in the longitudinal direction. The method according to claim 1, The drive rod is formed of a multi-crank crank structure, the upper and lower ends of the speaker, characterized in that connected to the diaphragm and the voice coil, respectively. The method according to claim 7, The drive rod is a speaker, characterized in that the portion connected to the diaphragm and the voice coil is formed of a "c" shaped structure. The method according to claim 2, The drive rod is a speaker, characterized in that attached to the diaphragm biased toward the opposite side of the sound hole.