JP4134449B2 - Speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used for various audio equipment.
[0002]
[Prior art]
A conventional speaker will be described with reference to a half sectional view of FIG.
[0003]
In the figure, reference numeral 6 denotes a magnetic circuit constituted by a lower plate 7 having a center pole, a ring-shaped magnet 8 and a ring-shaped upper plate 9, and a frame 10 is coupled to the upper surface of the magnetic circuit 6. . Reference numeral 11 denotes a voice coil, the inner peripheral edge of the suspension 13 is connected to the voice coil 11 and the outer periphery is connected to the frame 10 so that the lower part fits into the magnetic gap 12 of the magnetic circuit 6 without being eccentric. The voice coil 11 is supported by a suspension 13.
[0004]
Reference numeral 2 denotes a diaphragm. The outer periphery of the diaphragm 2 is coupled to the edge 1a, the outer periphery of the edge 1a is coupled to the frame 10 together with the gasket 14, and the inner periphery of the diaphragm 2 is connected to the upper portion of the voice coil 11. Is bound to.
[0005]
15 is a bowl-shaped dust cap coupled to the central upper surface of the diaphragm 2, and 16 is lead wires at both ends of the voice coil 11, and each eyelet 17 is caulked on the surface of the diaphragm 2. Each of the tinsel wires 18 is soldered and the other end of the tinsel wire 18 is soldered to a terminal 19a of a connector 19 fixed to the frame 10.
[0006]
The lead wire 16 is bonded to the diaphragm 2 by applying an adhesive.
[0007]
In addition, the most common method for bonding described above is to bond using an adhesive.
[0008]
The operation of the conventional speaker configured as described above will be described below.
[0009]
First, when an input signal is applied from the connector 19 to the voice coil 11 through the terminal 20 and the tinsel wire 18, the voice coil 11 is driven according to Fleming's left hand rule, and the diaphragm 2 is amplified by this driving force. It emits sound into the air.
[0010]
FIG. 17 is a half cross-sectional view of another conventional speaker. The difference from the conventional speaker of FIG. 16 is that a flat metal thin plate or a resin molding in which a dust cap 15a is coupled on the diaphragm 2 and the edge 1a. The point is that it is formed of a plate, and the others are not changed, so the description is omitted.
[0011]
[Problems to be solved by the invention]
However, in the conventional configuration described above, in the case of a loudspeaker of a type with a large input signal applied to the loudspeaker, a method of increasing the coupling surface between the diaphragm and the edge is used to increase the coupling strength. The joint portion becomes the point of action of the bending action, and strength deterioration occurs.
[0012]
In particular, when the diaphragm is made of a hard material (for example, made of metal), since the compliance differs greatly at the coupling portion between the outermost peripheral portion and the edge of the diaphragm, when the input signal increases and the amplitude of the diaphragm increases, the coupling portion becomes There is a problem that an edge having a large compliance becomes easy to break from the point of action as a point of action of the bending action.
[0013]
The present invention solves the above-described problems, and an object of the present invention is to provide a speaker with improved reliability for a large input.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the speaker of the present invention has a frame coupled to a magnetic circuit having a magnetic gap and a voice coil that fits in the magnetic gap, and the outer periphery is bonded to the edge. A diaphragm, an outer peripheral part coupled to the periphery of the frame, an edge provided with a concave annular rib spaced from the roll part on the outer periphery of a bonding surface with the diaphragm, and the annular rib are filled. elastic constituted by the adhesive having, by increasing the internal loss of the annular rib with an adhesive having elasticity is filled in the annular rib, and distribute the working point of flexion, the speaker of the input signal also increases the amplitude of becomes large and the vibration plate, hardly occurs breakage of the edge, while allowing the provision of a speaker with improved reliability with respect to a large input, the outer shape of the diaphragm As to seal covering the filled concave annular rib of the adhesive to increase the vibration plate, and makes it possible to provide a speaker regenerative capacity of the bass is enhanced.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a vibration in which a frame coupled to a magnetic circuit in which a magnetic gap is formed and a voice coil that fits in the magnetic gap are coupled to each other, and an outer peripheral portion is bonded to an edge. The plate, the outer peripheral portion is coupled to the peripheral edge of the frame, the edge provided with a concave annular rib spaced from the roll portion on the outer periphery of the bonding surface with the diaphragm, and the annular rib is filled It is composed of an adhesive having elasticity, and since the concave annular rib and the adhesive having elasticity are filled in the annular rib, the internal loss in the annular rib is increased, and the action point of the bending action is dispersed. even larger amplitude of the input signal becomes large and the diaphragm of the speaker is less likely to occur breakage of the edge, while allowing the provision of a speaker with improved reliability with respect to a large input, the upper The external shape of the vibration plate so as to seal covering the filled concave annular rib of the adhesive, to increase the vibration plate and makes it possible to provide a loudspeaker with improved play capacity of bass.
[0021]
In the invention according to claim 2 of the present invention , a dust cap is coupled to the diaphragm in the vicinity of the concave annular rib so as to cover the voice coil, and a concave- convex bent portion is formed at an intermediate portion to the outer periphery of the dust cap. The bent portion improves the overall mechanical strength of the dust cap, and makes it possible to provide a loudspeaker whose reproduction frequency is further expanded by reinforcing the mechanical strength.
[0022]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0023]
The same parts as those in the prior art are given the same numbers, and the description thereof is omitted, and only the differences will be described.
[0024]
(Embodiment 1)
FIG. 1 is a half sectional view of a speaker according to an embodiment of the present invention, and FIG. 2 is a perspective view of a principal part of a joining part of an edge and a diaphragm, which is the principal part.
[0025]
According to the figure, 1b is an annular rib having a U-shaped cross section that is spaced apart from the roll portion 1c on the outer peripheral surface of the edge of the connecting portion of the diaphragm 2 and the edge 1a, and 3 is filled in the annular rib 1b. For example, a rubber-based adhesive having flexibility even after being cured.
[0026]
With the configuration as described above, even if the internal loss is increased by the adhesive 3 in the annular rib 1b, the action point of the bending action is dispersed, the input signal of the speaker is increased, and the amplitude of the diaphragm is increased, the edge It is possible to obtain a speaker that is less likely to break 1a and has improved reliability against large inputs. In addition, due to the internal loss imparting action of the adhesive 3, resonance at the joint surface between the diaphragm 2 and the edge 1a is suppressed, and a flat frequency characteristic can be obtained.
[0027]
In the above embodiment, the shape of the annular rib 1b is described as a U-shape. However, the annular rib 1b may be appropriately set according to the form in which the adhesive 3 can be filled, and the annular rib 1b is formed with the edge 1a. A plurality of concentric circles may be provided depending on the size of the coupling portion of the diaphragm 2, and these are the same in the following embodiments. Moreover, in the said embodiment, although the shape of the roll part 1c of the edge 1a is illustrated as a down-roll shape, other shapes, such as an up-roll and a waveform, may be sufficient.
[0028]
(Embodiment 2)
Figure 3 is a perspective view of a main part of the joining parts of another embodiment of a main portion of the edge of the diaphragm of the present invention, FIG. 4 is a half cross-sectional view of the same speaker, as in the first embodiment these Only the differences will be described.
[0029]
The outer periphery of the diaphragm 2 is made larger than the position of the annular rib 1b of the roll portion 1c of the edge 1a, and a flexible adhesive 3 such as rubber is filled after being filled with the diaphragm 2. The sealed space 4 is provided.
[0030]
Since it comprised as mentioned above, it has the effect that the diaphragm 2 is enlarged and the reproduction | regeneration capability of a bass improves.
[0031]
(Embodiment 3)
FIG. 5 is a perspective view of an essential part of a joining part of an essential part of an edge and a diaphragm according to another embodiment of the present invention, FIG. 6 is a half cross-sectional view of the speaker, and FIG. Thus, only differences from the first embodiment will be described.
[0032]
Reference numeral 2 a denotes a bent portion on the outer periphery of the diaphragm 2. The adhesive 3 can be filled by applying the nozzle 5b of the adhesive applicator 5a to the bent portion 2a on the outer periphery of the diaphragm 2.
[0033]
Since it comprised as mentioned above, the application | coating of the adhesive agent 3 with which it fills the cyclic | annular rib 1b can be performed at high speed, and the cheap coupling | bonding component of the edge 1a and the diaphragm 2 can be obtained efficiently.
[0034]
In the above embodiment, the shape of the bent portion 2a on the outer periphery of the diaphragm 2 is a straight line, but the shape of the nozzle 5b of the adhesive applicator 5a and the required strength of the bent portion 2a on the outer periphery of the diaphragm 2 are set. What is necessary is just to set suitably collectively.
[0035]
(Embodiment 4)
FIG. 8 is a half sectional view of an embodiment of the present invention, and FIG. 9 is a perspective view of a main part of a joined part of a dust cap, an edge and a diaphragm, which are the main part.
[0036]
According to the figure, reference numeral 1b denotes a flat plate-shaped dust cap 15b having a bent portion 20 whose outer periphery is bent, and an annular ring having a U-shaped cross section provided on the outer peripheral surface of the edge 1a of the connecting portion of the diaphragm 2 and the edge 1a. A rib 3 is an adhesive such as a rubber-based adhesive having flexibility even after curing, which is filled in the annular rib 1b. The dust cap 15b corresponds to the dust cap 15a of the prior art, and the difference is that the bent portion 20 is provided.
[0037]
Since it is configured as described above, as in the first embodiment, the internal loss is increased by the adhesive 3 in the annular rib 1b, the action point of the bending action is dispersed, the input signal of the speaker is increased, and the diaphragm 2 Even if the amplitude is increased, the edge 1a is not easily broken, and a speaker with improved reliability for a large input can be obtained.
[0038]
Further, the bent portion 20 of the dust cap 15b makes it possible to fill the adhesive 3 by applying an adhesive application nozzle to the bent portion 20 of the dust cap 15b, and the adhesive filling the annular rib 1b. 3 can be applied at a high speed, and an inexpensive edge 1a, dust cap 15b, and diaphragm 2 can be obtained. Further, the bent portion 20 improves the mechanical strength of the outer periphery of the dust cap 15b. is there.
[0039]
In the above embodiment, the bent portion 20 of the dust cap 15b is a straight line, but may be appropriately set according to the shape of the nozzle for applying the adhesive and the required strength of the outer periphery of the dust cap 15b.
[0040]
In addition, due to the internal loss imparting action of the adhesive 3, resonance at the joining surface of the dust cap 15 b, the edge 1 a, and the diaphragm 2 is suppressed, and a flat frequency characteristic can be obtained.
[0041]
The above-described embodiment described above has the same effect as that of the third embodiment as understood from the above description, but the bent portion 20 is provided in the dust cap 15b. When the adhesive application nozzle (for example, the nozzle 5b in FIG. 7) is used as a guide, the dust cap 15b is a metal plate as compared with the case where the bent portion 2a of the diaphragm 2 is used as a guide as in the third embodiment. In addition, since the resin molded plate has sufficient strength, the filling work speed can be improved.
[0042]
(Embodiment 5)
FIG. 10 is a perspective view of the main part of the dust cap of the main part of another embodiment of the present invention, and FIG. 11 is a half sectional view of the speaker , and only the differences from the fourth embodiment will be described. To do.
[0043]
15c is a dust cap which has the outer peripheral part 20a which bent and turned over the outer periphery.
[0044]
Since it comprised as mentioned above, the mechanical strength of the outer peripheral part of the dust cap 15c further improves.
[0045]
In the above embodiment, the shape of the outer peripheral portion 20a of the dust cap 15c is a straight line. However, the shape may be appropriately set according to the shape of the nozzle for applying the adhesive and the required strength of the outer peripheral portion 20a of the dust cap 15c. is there.
[0046]
(Embodiment 6)
FIG. 12 is a perspective view of an essential part of a dust cap as an essential part of another embodiment of the present invention, and FIG. 13 is a half sectional view of the speaker.
[0047]
Reference numeral 15d denotes a cylindrical recess 21 that is fitted into the ring shape of the voice coil 11 and joined to the dust cap 15c of the fifth embodiment.
[0048]
With the above configuration, the centering accuracy and the coupling strength when the dust cap 15d is incorporated into the speaker are improved.
[0049]
In this embodiment, the fitting cap between the dust cap 15d and the voice coil 11 is on the inner side of the ring of the voice coil 11, but it may be on the outer side or the upper surface, and may be set appropriately according to the form of the speaker. is there.
[0050]
(Embodiment 7)
FIG. 14 is a perspective view of an essential part of a dust cap as an essential part of another embodiment of the present invention, and FIG. 15 is a half sectional view of the speaker.
[0051]
15e is provided with a concave and convex bent portion 22 in the middle of the joint between the dust cap 15d of Embodiment 6 and the voice coil 11 (cylindrical concave portion 21) and the joint between the edge 1a and the diaphragm 2. It is a dust cap.
[0052]
The bent portion 22 also improves the overall mechanical strength of the dust cap 15e, and it is possible to provide a loudspeaker whose reproduction frequency is further expanded by the reinforcing action of the mechanical strength.
[0053]
In the above embodiment, the bent portion 22 has been described as being provided between the joint portion between the cylindrical concave portion 21 and the edge 1a. However, the bent portion 22 may be provided in the middle portion of the dust cap 15e without the cylindrical concave portion 21. It is possible to provide a speaker that improves mechanical strength and increases the reproduction frequency.
[0054]
In addition, the bent portion 22 of the dust cap 15e in the present embodiment has an uneven shape, but may be a corrugated shape, a wedge shape, or the like, and may be appropriately set according to the form of the speaker and the clearance with the diaphragm 2. is there.
[0055]
In addition, if a thing with high thermal conductivity, such as a metal plate, is used as the dust cap of the fourth to sixth embodiments, the temperature rise of the voice coil 11 is suppressed by the heat dissipation effect, and the input resistance can be improved. Particularly, in the case where the dust caps 15d and 15e are fitted into the voice coil 11 as in the fifth and sixth embodiments, the input resistance can be further improved due to the heat radiation effect.
[0056]
【The invention's effect】
As described above, the speaker according to the present invention fills the annular rib with adhesive, thereby increasing the internal loss in the annular rib, thereby dispersing the action point of the bending action, increasing the input signal of the speaker and causing vibration. Even if the amplitude of the plate increases, it is possible to obtain a speaker in which edge breakage hardly occurs and the reliability with respect to a large input is improved.
[Brief description of the drawings]
FIG. 1 is a half sectional view of a speaker according to an embodiment of the present invention. FIG. 2 is a perspective view of a principal part of a joining part of an edge and a diaphragm, which is the principal part. FIG. 4 is a half sectional view of the loudspeaker. FIG. 5 is a perspective view of the essential part of the joint part of the diaphragm and the diaphragm. FIG. 6 is a half sectional view of the speaker. FIG. 7 is a schematic view of an adhesive application process of the edge of the main part and a diaphragm. FIG. 8 is a half section of another embodiment of the speaker of the present invention. FIG. 9 is a perspective view of a main part of a joint part of a dust cap and an edge and a diaphragm which are the main part. FIG. 10 is a perspective view of a main part of the dust cap of the main part of the other embodiment. 11] Half sectional view of the speaker. [FIG. 12] Perspective view of the essential part of the dust cap of the essential part of the other embodiment. [FIG. 13] Half sectional view of the speaker. 14 is a perspective view of the main part of the dust cap of the main part of the other embodiment. FIG. 15 is a half sectional view of the speaker. FIG. 16 is a half sectional view of the conventional speaker. Half-sectional view of [Description of symbols]
DESCRIPTION OF SYMBOLS 1a Edge 1b Annular rib 2 Diaphragm 3 Adhesive 4 Sealed space 5b Nozzle 6 Magnetic circuit 10 Frame 11 Voice coil 12 Magnetic gap 15b, 15c, 15d, 15e Dust cap 20, 22 Bending part 20a Outer part 21 Recessed part

Claims (2)

A frame coupled to a magnetic circuit in which a magnetic gap is formed, a diaphragm coupled around a voice coil that fits in the magnetic gap, and an outer peripheral portion bonded to an edge, and an outer peripheral portion on the periphery of the frame Consists of an edge provided with a concave annular rib provided on the outer periphery of the bonding surface with the diaphragm and spaced apart from the roll portion, and an elastic adhesive filled in the annular rib And a speaker in which the concave annular rib filled with the adhesive is covered and sealed with the diaphragm . With coupling the dust cap to the diaphragm in the vicinity of the concave annular rib so as to cover the voice coil, a speaker according to claim 1 provided with at least bent portion of the uneven shape in the middle part up to the outer circumference of the dust cap .

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