JP2004112276A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker that can increase the vibration area of a dumper, obtain large amplitude in a low-frequency range, and also decrease the minimum resonance frequency even in a small speaker where the space section between a voice coil and a frame inner-periphery section is narrow and an aperture is small. <P>SOLUTION: The tip section of a voice coil bobbin 18 where the voice coil 17 is arranged at a specific position in a gap in a magnetic circuit 14 is allowed to pass through the dumper 19 and a cone-like diaphragm 16, the diaphragm 16 is fixed to the voice coil bobbin 18 in one piece at the penetration section, and a bottom surface section 16e of the diaphragm 16 is brought into contact with a vibration plate reception section 19e formed at the center section of the dumper 19 for retention to compose the speaker 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a speaker used for various kinds of audio equipment, and more specifically, to a small speaker used for a personal computer or the like.
[0002]
[Prior art]
In a general loudspeaker, the damper that holds the diaphragm and the voice coil at the normal position of the gap affects the lowest resonance frequency and performs the same amplitude similarly to the edge in terms of performance. The inner diameter portion is bonded and fixed to the outer peripheral portion of the voice coil bobbin with an adhesive, and the outer diameter portion is fixed to a flat portion formed near the inner bottom portion of the frame. A neck portion (bottom portion) of a cone-shaped diaphragm is bonded and fixed to an upper outer periphery of the bobbin.
[0003]
In such a speaker, a small speaker is often used for a personal computer (hereinafter, referred to as a "personal computer") due to restrictions on attachment to a personal computer. As shown in FIG. 4, there is a case where a speaker 1 having a large voice coil diameter is used due to the necessity of satisfying a demand for high power and low tone reproduction.
[0004]
As is clear from FIG. 4, the diameter of the diaphragm 2 is reduced, and the diameter of the voice coil / bobbin 3 used is increased to increase the voice coil diameter. However, the space formed between the outer peripheral portion of the voice coil bobbin 3 and the inner peripheral portion of the frame 4 becomes extremely narrow, and the space in which the damper 5 can be arranged is reduced. It was impossible to increase the vibration area, and as a result, it was not possible to obtain a large amplitude during the operation of the speaker, and it was also difficult to lower the lowest resonance frequency.
[0005]
As a method for solving the above-mentioned problem, the holding of a vibration system including a diaphragm using a damper, a voice coil bobbin wound with a voice coil (hereinafter, simply referred to as “bobbin”), a dust cap and a lead wire is stopped. There is a method of supporting a plate on a flat portion formed in an opening of a frame only by an edge integrally provided on an outer peripheral portion of the plate.
[0006]
[Problems to be solved by the invention]
However, when the vibration system holding means by the edge has a large amplitude in a low frequency range, the vibration system components cause rolling, the windings and the bobbin easily come into contact with the gap of the magnetic circuit, and the input resistance is increased. Can not. As a means to solve this rolling, it is possible to widen the gap of the magnetic circuit so that windings and bobbins do not touch the gap, but widening the gap reduces the magnetic flux density, and the sound pressure is reduced. There is a disadvantage that it decreases.
[0007]
In view of this situation, the present invention can increase the vibration area of the damper even in a small-diameter speaker in which the space formed between the bobbin and the inner peripheral portion of the frame is small, Therefore, it is an object of the present invention to provide a speaker that can obtain a large amplitude and a low minimum resonance frequency.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the speaker according to claim 1 of the present invention includes:
At the same time that the tip of the voice coil bobbin in which the voice coil is arranged at a predetermined position in the gap formed in the magnetic circuit penetrates a part of the damper and the cone-shaped diaphragm,
The speaker is characterized in that the diaphragm and the voice coil bobbin are integrally fixed at a through portion.
[0009]
The invention described in claim 2 of the present invention
At the same time that the tip of the voice coil bobbin in which the voice coil is arranged at a predetermined position in the gap formed in the magnetic circuit penetrates a part of the damper and the cone-shaped diaphragm,
The diaphragm and the voice coil bobbin are integrally fixed at a through portion,
Further, the speaker is characterized in that the respective center portions of the diaphragm and the damper are integrally fixed in the voice coil bobbin.
[0010]
Further, the invention described in claim 6 of the present invention is:
A voice coil bobbin having a voice coil at the lower part of the cylindrical body, forming a plurality of notches uniformly from the upper edge to the lower edge, and forming a plurality of arc-shaped side walls in the same circle,
A damper in which a whole has a disk shape and a through hole for penetrating the side wall is formed in a portion opposed to a plurality of arc-shaped side walls formed in the voice coil bobbin,
In a portion opposed to a plurality of arc-shaped side walls formed in the voice coil bobbin, having a cone-shaped diaphragm in which a through hole for penetrating the side wall is formed,
The tip of the voice coil bobbin, in which the voice coil is arranged at a predetermined position in the gap of the magnetic circuit, penetrates through a damper and a cone-shaped diaphragm, and the diaphragm and the voice coil bobbin are integrally formed at the penetrating portion. The speaker is characterized in that it is fixed and the respective central portions of the diaphragm and the damper are integrally fixed in the voice coil bobbin.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a speaker according to the present invention will be specifically described with reference to the accompanying drawings. However, the present invention is not limited to the illustrated one, and various changes may be made without departing from the spirit of the present invention. Can be done.
[0012]
FIG. 1 is a schematic explanatory view showing an example of the speaker of the present invention, FIG. 2 is a partially cutaway plan view of the speaker shown in FIG. 1, and FIG. 3 is an exploded perspective view of a main part of the speaker according to the present invention. .
[0013]
The speaker 10 according to the present invention is a small-diameter speaker used for a personal computer or the like, and as shown in FIG. 1, an inner-magnet-type magnetic circuit 14 including a pot yoke 11, a magnet 12, and a pole piece 13. , A frame 15, a cone-shaped diaphragm 16, a bobbin 18 on which a voice coil 17 is wound, and a damper 19.
[0014]
When the voice coil 17 is arranged at a predetermined position of the gap formed between the pot yoke 11 and the pole piece 13 of the magnetic circuit 14 in the speaker 10 having the above-described configuration, the present invention employs the voice coil 17 The tip of the bobbin 18, which has been wound, is passed through a required portion of the damper 19 and the diaphragm 16, and the tip protrudes inside the body of the diaphragm 16. It is characterized in that each central part is bonded and fixed.
[0015]
That is, as shown in FIG. 3, the bobbin 18 of the speaker 10 according to the present invention has the voice coil 17 wound around the lower peripheral portion of the cylindrical body and a plurality of cuts extending from the upper edge to the lower edge of the cylindrical body. The notches 20 (four in FIG. 3) are formed uniformly, and a plurality of (four in FIG. 3) arc-shaped side walls 18a, 18b, 18c, 18d are formed in the same circle. Reference numerals 21 and 22 denote lead wires connecting the input terminal 23 provided on the frame 15 and the voice coil 17.
[0016]
The damper 19 has a disk shape as a whole, and penetrates through the side walls 18a, 18b, 18c, 18d at portions opposed to a plurality of arc-shaped side walls 18a, 18b, 18c, 18d formed on the bobbin 18. Through holes 19a, 19b, 19c, and 19d are formed, and an outer peripheral portion thereof is adhered and fixed to a flat portion 15b formed inside the vicinity of the bottom surface of the frame 15, and is formed at a center portion. Is formed with a concave diaphragm receiving portion 19e that receives a bottom surface portion 16e of the diaphragm 16 described later, and through holes 19a, 19b, 19c, and 19d that receive the arc-shaped side wall of the bobbin 18. As long as the diaphragm receiving portion 19e is formed, corrugation may be formed, and there is no particular limitation on the shape and material.
[0017]
As shown in FIG. 1, the cone-shaped diaphragm 16 has an inverted truncated cone shape, and has a bottom surface 16e closed. The through holes 16a, 16b, 16c, 16d are formed opposite to the arc-shaped side walls 18a, 18b, 18c, 18d of the bobbin 18, and the material is not limited at all.
[0018]
Since the diaphragm 16 and the bobbin 18 are joined together and integrated at the through holes 16a, 16b, 16c, and 16d of the diaphragm 16, as shown in FIG. It is preferable to form a joint 16f integrally along the side, and the outer peripheral portion of the diaphragm 16 is fixed to the outer peripheral flat portion 15a of the frame 15 via the outer peripheral portion of the edge 24.
[0019]
In the speaker 10 made of such a component, first, the damper 19 is formed from the upper part of each of the side walls 18a, 18b, 18c, 18d formed in the bobbin 18 by the respective through holes 19a, 19b, 19c, 19d formed in its body. After being arranged so as to face each of the side walls 18a, 18b, 18c and 18d, it is dropped downward.
[0020]
Next, the diaphragm 16 is dropped into the bobbin 18 along the side walls 18a, 18b, 18c, 18d using the through holes 16a, 16b, 16c, 16d formed substantially in the middle of the inclined body. With the voice coil 17 held in the gap of the circuit 14 using a jig, the outer peripheral portion of the damper 19 is bonded and fixed to the outer peripheral flat portion 15 b of the frame 15.
[0021]
At this time, the diaphragm receiving portion 19e formed at the center of the damper 19 by the mounting of the damper 19 is located at the center of the bobbin 18, so that the diaphragm 16 is dropped at the same time when the diaphragm 16 is dropped. Is inserted into the diaphragm receiving portion 19e, and the both are integrated with an adhesive or the like.
[0022]
Thereafter, the outer peripheral portion of the edge 24 integrated with the vibration plate 16 is fixed to the outer peripheral flat portion 15a of the frame 15, and the inside of the joining portion 16f provided downward to the outside of the through holes 16a, 16b, 16c, 16d. The peripheral portion and the outer peripheral portion of the bobbin 18 are joined and bonded to fix the diaphragm 16 to the bobbin 18.
[0023]
Further, a gasket 25 is adhered and fixed in a ring shape on the upper surface of the edge 24, and a dust cap 26 is attached so as to cover an upper opening of the voice coil bobbin 18, and the speaker 10 is assembled. The procedure is not limited to this, and it goes without saying that the damper 19 and the diaphragm 16 may be integrated in advance.
[0024]
Further, when the bobbin 18 and the diaphragm 16 are integrated with each other, in the drawing, the joining portion 16f is vertically provided outside the through hole formed in the inclined body portion of the diaphragm 16, that is, on the frame 15 side. The diaphragm 16 and the damper 19 may be joined using eyelets.
[0025]
【The invention's effect】
According to the speaker of the present invention, the tip of a voice coil bobbin in which a voice coil is disposed at a predetermined position in a gap of a magnetic circuit is penetrated through a damper and a cone-shaped diaphragm, and a diaphragm is provided in the voice coil bobbin. Since the center of the damper is located and the diaphragm and the voice coil bobbin, and the diaphragm and the damper are each integrated, even if the speaker has a small diameter and a large voice coil diameter, the vibration area of the damper Can be increased.
[0026]
In particular, in the speaker according to the present invention, since the respective center portions of the damper and the cone-shaped diaphragm are located in the voice coil bobbin, the voice coil can be moved up and down accurately even when there is a large amplitude during the operation of the speaker. And the lowest resonance frequency can be easily reduced.
[0027]
Also, by integrating the diaphragm and the damper inside the voice coil bobbin, even if the amplitude becomes large, the vibration system becomes difficult to roll, so that the voice coil or the voice coil bobbin may come into contact with the gap. Since there is no gap and there is no need to widen the gap, excellent effects such as a decrease in magnetic flux density and sound pressure are achieved.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a speaker of the present invention.
FIG. 2 is a partially cutaway plan view of the speaker shown in FIG.
FIG. 3 is an exploded perspective view of a main part of the speaker according to the present invention.
FIG. 4 is a schematic explanatory view showing an example of a conventional speaker.
[Explanation of symbols]
Reference Signs List 10 Speaker 14 Magnetic circuit 15 Frame 16 Diaphragm 16e Bottom part 17 of diaphragm 17 Voice coil 18 Bobbin 19 Damper 19e Diaphragm receiving part 20 Notch

Claims (6)

At the same time that the tip of the voice coil bobbin in which the voice coil is arranged at a predetermined position in the gap formed in the magnetic circuit penetrates a part of the damper and the cone-shaped diaphragm,
A speaker, wherein the diaphragm and the voice coil / bobbin are integrally fixed at a penetrating portion. At the same time that the tip of the voice coil bobbin in which the voice coil is arranged at a predetermined position in the gap formed in the magnetic circuit penetrates a part of the damper and the cone-shaped diaphragm,
The diaphragm and the voice coil bobbin are integrally fixed at a through portion,
A speaker wherein the respective center portions of the diaphragm and the damper are integrally fixed in the voice coil bobbin. The voice coil bobbin is
It has a voice coil at the lower part of the cylindrical body, a plurality of notches are formed uniformly from the upper edge to the lower edge, and a plurality of arc-shaped side walls are formed in the same circle. The speaker according to claim 1 or 2, wherein The damper is
2. A disk-shaped body as a whole, wherein a through-hole for penetrating the side wall is formed at a portion facing a plurality of arc-shaped side walls formed on the voice coil bobbin. Or the speaker according to 2. The cone-shaped diaphragm,
The speaker according to claim 1, wherein a through hole for penetrating the side wall is formed in a portion facing the plurality of arc-shaped side walls formed in the voice coil bobbin. A voice coil bobbin having a voice coil at the lower part of the cylindrical body, forming a plurality of notches uniformly from the upper edge to the lower edge, and forming a plurality of arc-shaped side walls in the same circle,
A damper in which a whole has a disk shape and a through hole for penetrating the side wall is formed in a portion opposed to a plurality of arc-shaped side walls formed in the voice coil bobbin,
In a portion opposed to a plurality of arc-shaped side walls formed in the voice coil bobbin, having a cone-shaped diaphragm in which a through hole for penetrating the side wall is formed,
The tip of the voice coil bobbin, in which the voice coil is arranged at a predetermined position in the gap of the magnetic circuit, penetrates through a damper and a cone-shaped diaphragm, and the diaphragm and the voice coil bobbin are integrally formed at the penetrating portion. A speaker, wherein the center of the diaphragm and the center of the damper are integrally fixed in the voice coil bobbin.

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