JP2001025089A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability in great input of an edge concerning a speaker to be used for various kinds of audio equipment. SOLUTION: The inside of an annular rib 1b of an edge 1a provided with a recessed annular rib 1b around the outer periphery of a joint surface with a diaphragm 2 is filled with an elastic adhesive 3 and by increasing an internal loss inside the annular rib 1b, an operating point of bending operation is distributed. Even when an input signal of a speaker is enlarged and amplitude of the diaphragm 2 is enlarged, a break of the edge 1a is suppressed and reliability in great input is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used for various kinds of audio equipment.

[0002]

2. Description of the Related Art A conventional speaker will be described with reference to a half sectional view of FIG.

In FIG. 1, reference numeral 6 denotes a magnetic circuit composed of a lower plate 7 having a center pole, a ring-shaped magnet 8, and a ring-shaped upper plate 9.
A frame 10 is connected to the upper surface of the magnetic circuit 6. Reference numeral 11 denotes a voice coil, and the inner periphery of the suspension 13 is attached to the voice coil 1 so that the lower portion fits into the magnetic gap 12 of the magnetic circuit 6 without being eccentric.
1 and the outer periphery thereof is connected to a frame 10, and the voice coil 11 is supported by a suspension 13.

A diaphragm 2 has an outer peripheral portion connected to the edge 1a, an outer peripheral portion of the edge 1a is connected to the frame 10 together with the gasket 14, and an inner peripheral portion of the diaphragm 2 is connected to the voice coil. 11 at the top.

Reference numeral 15 denotes a bowl-shaped dust cap coupled to the upper surface of the center of the diaphragm 2, and 16 denotes lead wires at both ends of the voice coil 11, each of which is caulked on the surface of the diaphragm 2. At eyelet 17, each Kinshi line 1
8 and the other end of the tinsel wire 18 is connected to the frame 1
The terminal 19a of the connector 19 fixed to 0 is connected by soldering.

The lead 16 is bonded to the diaphragm 2 by applying an adhesive.

[0007] The most common method of bonding described above is to use an adhesive.

The operation of the conventional loudspeaker configured as described above will be described below.

First, an input signal is sent from the connector 19 to the terminal 2.
0, when applied to the voice coil 11 through the tinsel wire 18, the voice coil 11 is applied according to Fleming's left-hand rule.
Are driven, and the diaphragm 2 oscillates and emits sound into the air by the driving force.

FIG. 17 is a half sectional view of another conventional speaker. The difference from the conventional speaker of FIG. 16 is that a flat metal thin plate in which a dust cap 15a is connected to the diaphragm 2 and the edge 1a is provided. And a resin molded plate. Since the other components are the same, the description is omitted.

[0011]

However, in the above conventional configuration, in the case of a speaker of a type in which the input signal applied to the speaker is large, a method of increasing the coupling surface between the diaphragm and the edge to increase the coupling strength is used. However, when the loudspeaker is driven, the connecting portion becomes a point of action of the bending action, and the strength is deteriorated.

In particular, when the diaphragm is made of a hard material (for example, made of metal), the compliance greatly differs at the coupling portion between the outermost peripheral portion of the diaphragm and the edge. Therefore, when the input signal increases and the amplitude of the diaphragm increases, There has been a problem that the joint portion serves as a point of action of the bending action, and an edge having a large compliance is easily broken from the point of action.

An object of the present invention is to solve the above-mentioned problems and to provide a speaker having improved reliability for a large input.

[0014]

In order to solve the above-mentioned problems, a speaker according to the present invention comprises a frame connected to a magnetic circuit having a magnetic gap, and a voice coil connected to a center of a voice coil which fits into the magnetic gap. A vibrating plate having a portion bonded to the edge, an outer peripheral portion connected to a peripheral edge of the frame, and an edge having a concave annular rib provided on an outer periphery of a surface bonded to the vibrating plate; With the elastic adhesive filled in the annular rib, by increasing the internal loss in the annular rib by the elastic adhesive filled in the annular rib,
Even if the action point of the bending action is dispersed, even if the input signal of the speaker becomes large and the amplitude of the diaphragm becomes large, the breakage of the edge hardly occurs and it is possible to provide a speaker with improved reliability for a large input. is there.

[0015]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a frame coupled to a magnetic circuit having a magnetic gap, a voice coil which fits into the magnetic gap, and an outer peripheral portion having an edge are provided. A diaphragm bonded to the periphery of the frame, and an edge provided with a concave annular rib on an outer periphery of a surface to be bonded to the diaphragm while the outer peripheral portion is coupled to a periphery of the frame; It is composed of an adhesive having elasticity, and the concave annular rib and the adhesive having elasticity are filled in the annular rib, thereby increasing the internal loss in the annular rib and dispersing the action point of the bending action. However, even when the input signal of the speaker is increased and the amplitude of the diaphragm is increased, it is possible to provide a speaker in which edge breakage is unlikely to occur and reliability for a large input is improved.

According to a second aspect of the present invention, the outer shape of the diaphragm according to the first aspect is enlarged so as to cover and seal the concave annular rib filled with an adhesive.
In addition to the effects described above, it is possible to provide a speaker in which the diaphragm is enlarged and the bass reproduction capability is improved.

According to a third aspect of the present invention, a bent portion is provided on the outer peripheral portion of the diaphragm according to the first aspect. In addition to the same effect as in the first aspect, the outer peripheral portion of the diaphragm is provided. The bend of the outer peripheral part strengthens the mechanical strength of the outer part, thereby increasing the reproduction frequency and preventing deformation when the nozzle of the application device for applying the adhesive for filling the annular rib is in contact with the nozzle. This facilitates setting, increases the efficiency of the adhesive filling process, and enables the provision of an inexpensive speaker.

According to a fourth aspect of the present invention, a bent portion is provided on an outer periphery of a dust cap connected to a diaphragm near the concave annular rib of the first aspect so as to cover the voice coil. In addition to the effects of the first aspect, it is possible to fill the adhesive by applying an adhesive application nozzle to the outer peripheral portion of the dust cap, so that the adhesive applied to the annular rib can be applied at a high speed. In addition, the efficiency of the adhesive filling process can be increased, and an inexpensive speaker can be provided. By bending the outer peripheral portion, the mechanical strength of the outer peripheral portion of the dust cap is also improved, thereby enhancing the mechanical strength. Accordingly, it is possible to provide a speaker whose reproduction frequency is expanded.

According to a fifth aspect of the present invention, there is provided a dust cap according to the fourth aspect, wherein a bent portion is provided on an outer periphery of the bent portion. An object of the present invention is to provide a speaker that can be improved to further increase the reproduction frequency.

According to a sixth aspect of the present invention, the dust cap according to the fourth or fifth aspect is fitted to a voice coil and connected to the voice coil. The bonding strength is improved.

According to a seventh aspect of the present invention, the dust cap according to the fourth, fifth, or sixth aspect is provided with a bent portion having an uneven shape at an intermediate portion thereof. Accordingly, the mechanical strength of the dust cap as a whole is also improved, and a speaker whose reproduction frequency is further expanded by the reinforcing action of the mechanical strength can be provided.

An embodiment of the present invention will be described below with reference to FIGS.

The same parts as those in the prior art are given the same reference numerals, and the description thereof will be omitted, and only different points will be described.

(Embodiment 1) FIG. 1 is a half sectional view of an embodiment of a speaker according to the present invention, and FIG. 2 is a perspective view of an essential part of a joint part of an edge and a diaphragm which is the essential part. is there.

According to the figure, 1b is a diaphragm 2 and an edge 1
Reference numeral a denotes an annular rib having a U-shaped cross section provided on the outer peripheral surface of the edge of the joint portion, and reference numeral 3 denotes a rubber-based adhesive filled in the annular rib 1b and having flexibility after curing.

With the above configuration, the annular rib 1b
The internal adhesive 3 increases the internal loss, disperses the point of action of the bending action, and even if the input signal of the speaker increases and the amplitude of the diaphragm increases, breakage of the edge 1a is unlikely to occur, and reliability with respect to a large input is reduced. It is possible to obtain a speaker with improved performance. In addition, due to the internal loss imparting action of the adhesive 3, the resonance at the joint surface between the diaphragm 2 and the edge 1a is suppressed, and an effect that a flat frequency characteristic can be obtained.

In the above-described embodiment, the shape of the annular rib 1b has been described as a U-shape. However, the shape may be appropriately set in accordance with the form in which the adhesive 3 can be filled. Depending on the size of the coupling portion between the edge 1a and the diaphragm 2, a plurality of concentric circles may be provided, and these are the same in the following embodiments. Further, in the above embodiment, the roll portion 1 of the edge 1a is provided.
Although the shape of c is shown as a down-roll shape, another shape such as an up-roll or a waveform may be used.

(Embodiment 2) FIG. 3 is a perspective view of a main part of a joint part between an edge of a main part and a diaphragm according to another embodiment of the present invention, and FIG. 4 is a half sectional view of the speaker. is there.

The annular rib 1b of the roll portion 1c of the edge 1a
And a sealed space 4 filled with an adhesive 3 such as a rubber-based adhesive which is filled with the diaphragm 2 and has flexibility even after curing. .

With the above configuration, the diaphragm 2 can be enlarged to improve the bass reproduction performance.

(Embodiment 3) FIG. 5 is a perspective view of a main part of an edge part of a main part and a connecting part of a diaphragm according to another embodiment of the present invention, and FIG. 6 is a half sectional view of the speaker. FIG. 7 is a schematic view of an adhesive application step.

Reference numeral 2a 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 application device 5a to the bent portion 2a on the outer periphery of the diaphragm 2.

With the above configuration, the annular rib 1b
The adhesive 3 can be applied at a high speed, and an inexpensive connection part between the edge 1a and the diaphragm 2 can be efficiently obtained.

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 coating device 5a, the shape of the bent portion 2a on the outer periphery of the diaphragm 2
What is necessary is just to set appropriately according to the required strength of a.

(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 the main part of the dust cap, the edge and the diaphragm, which are the main parts. It is.

According to the drawing, reference numeral 1b denotes a U-shaped cross section provided on the outer peripheral surface of the edge 1a of the connecting portion of the flat plate-shaped dust cap 15b having the bent portion 20 and the diaphragm 2 and the edge 1a. Numeral 3 is an adhesive such as a rubber-based adhesive filled into the annular rib 1b and having flexibility after curing. The dust cap 15b corresponds to the dust cap 15a of the related art, and the difference is that the dust cap 15b has a bent portion 20.

With the configuration described above, the first embodiment
Similarly to the above, even if the internal loss increases due to the adhesive 3 in the annular rib 1b, the action point of the bending action is dispersed, and the input signal of the speaker increases, and the amplitude of the diaphragm 2 increases.
It is possible to obtain a speaker in which the edge 1a is hardly broken, and which has improved reliability for a large input.

The bent portion 20 of the dust cap 15b
Accordingly, the adhesive 3 can be filled by applying a nozzle for applying adhesive to the bent portion 20 of the dust cap 15b, and the adhesive 3 to be filled in the annular rib 1b can be applied at high speed, and the cost can be reduced. A coupling part of the edge 1a, the dust cap 15b, and the diaphragm 2 can be obtained.
Thereby, the mechanical strength of the outer peripheral portion of the dust cap 15b is also improved.

In the above embodiment, the bent portion 20 of the dust cap 15b is formed as a straight line. However, the bent portion 20 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. It is.

Further, the effect of imparting the internal loss of the adhesive 3 suppresses the resonance at the joint surface between the dust cap 15b, the edge 1a and the diaphragm 2, and has the effect of obtaining a flat frequency characteristic.

The above embodiment described above is
As can be understood from the above description, the third embodiment has the same effects as those of the third embodiment. However, since the bent portion 20 is provided on the dust cap 15b, a nozzle for applying the adhesive (for example, FIG. When the nozzle 5b) is used as a guide, the dust cap 15b is made of a metal plate or a resin molded plate and has a sufficient strength as compared with the case where the bent portion 2a of the diaphragm 2 is used as a guide as in the third embodiment. By doing so, the speed of the filling operation can be improved.

(Embodiment 5) FIG. 10 is a perspective view of a main part of a dust cap according to another embodiment of the present invention, and FIG. 11 is a half sectional view of the speaker.

Reference numeral 15c denotes a dust cap having an outer peripheral portion 20a having an outer periphery bent and folded.

With the above configuration, the mechanical strength of the outer peripheral portion of the dust cap 15c is further improved.

In the above embodiment, the shape of the outer peripheral portion 20a of the dust cap 15c is a straight line. However, if the outer peripheral portion 20a of the dust cap 15c is appropriately set in accordance with the nozzle shape and the required strength of the outer peripheral portion 20a of the dust cap 15c. Good thing.

(Embodiment 6) FIG. 12 is a perspective view of a main part of a dust cap according to another embodiment of the present invention, and FIG. 13 is a half sectional view of the speaker.

15d is the dust cap 1 of the fifth embodiment.
5c is provided with a cylindrical concave portion 21 which is fitted into and joined to the ring shape of the voice coil 11.

With the above configuration, the dust cap 15
This is to improve centering accuracy and coupling strength when d is incorporated into a speaker.

Although the fitting of the voice coil 11 to the dust cap 15d in this embodiment is performed inside the ring of the voice coil 11, it may be performed outside or on the upper surface. Good thing.

(Embodiment 7) FIG. 14 is a perspective view of a main part of a dust cap according to another embodiment of the present invention, and FIG. 15 is a half sectional view of the speaker.

15e is the dust cap 1 of the sixth embodiment.
5d joint with voice coil 11 (cylindrical recess 21)
This is a dust cap provided with a bent portion 22 having a concave-convex shape in the middle of the joint between the edge 1a and the diaphragm 2.

The bent portion 22 allows the dust cap 15
The overall mechanical strength of e is also improved, and it is possible to provide a speaker whose reproduction frequency is further expanded by the action of reinforcing the mechanical strength.

In the above embodiment, the bent portion 22
Has been described as being provided between the joint between the cylindrical recess 21 and the edge 1a. However, the mechanical strength can be improved and the reproduction frequency can be increased by providing the intermediate portion of the dust cap 15e without the cylindrical recess 21. It becomes possible to provide a speaker.

The bent portion 22 of the dust cap 15e in this embodiment has an uneven shape.
It may be wedge-shaped or the like, and may be set as appropriate according to the form of the speaker and the clearance with the diaphragm 2.

If a dust cap having a 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 radiation effect, and the input resistance can be improved. In particular, as in Embodiments 5 and 6, the dust cap 15
In the case where d and 15e are fitted into the voice coil 11, the heat dissipation effect can further improve the input resistance.

[0056]

As described above, in the loudspeaker of the present invention, by filling the annular rib with the adhesive, the internal loss in the annular rib is increased, and the action point of the bending action is dispersed. Even if the signal becomes large and the amplitude of the diaphragm becomes large, the breakage of the edge hardly occurs, and a speaker with improved reliability for a large input can be obtained.

[Brief description of the drawings]

FIG. 1 is a half sectional view of an embodiment of a speaker according to the present invention.

FIG. 2 is a perspective view of a main part of the joint part between the edge and the diaphragm, which is the main part.

FIG. 3 is a perspective view of a main part of a joined part of the edge of the main part and the diaphragm according to the other embodiment.

FIG. 4 is a half sectional view of the speaker.

FIG. 5 is a perspective view of a main part of a joint part between the edge of the main part and the diaphragm according to the other embodiment.

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 the diaphragm.

FIG. 8 is a half sectional view of another embodiment of the speaker of the present invention.

FIG. 9 is a perspective view of an essential part of a joining part of the dust cap, the edge, and the diaphragm, which is the essential part.

FIG. 10 is a perspective view of a main part of a main part of a dust cap according to another embodiment.

FIG. 11 is a half sectional view of the speaker.

FIG. 12 is a perspective view of a main part of a main part of a dust cap according to another embodiment.

FIG. 13 is a half sectional view of the speaker.

FIG. 14 is a perspective view of a main part of a main part of a dust cap according to another embodiment.

FIG. 15 is a half sectional view of the speaker.

FIG. 16 is a half sectional view of a conventional speaker.

FIG. 17 is a half sectional view of another conventional speaker.

[Explanation 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 bent portion 20a outer peripheral portion 21 concave portion

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroyuki Amada 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Terms (reference) 5D012 AA03 CA09 CA14 FA04 GA01 5D016 AA09 AA15 BA02 BA04 EC22 FA01 GA01 HA06

Claims (7)

[Claims] 1. A frame coupled to a magnetic circuit having a magnetic gap formed therein, a diaphragm coupled to a voice coil which fits into the magnetic gap and having an outer peripheral portion bonded to an edge, A speaker comprising an edge coupled to a peripheral edge of the frame and having a concave annular rib provided on an outer periphery of a surface to be bonded to the diaphragm, and an elastic adhesive filled in the annular rib. 2. The speaker according to claim 1, wherein the outer shape of the diaphragm is enlarged so as to cover and seal the concave annular rib filled with the adhesive. 3. The speaker according to claim 1, wherein a bent portion is provided on an outer peripheral portion of the diaphragm. 4. The speaker according to claim 1, wherein a bent portion is provided on the outer periphery of the dust cap connected to the diaphragm near the concave annular rib so as to cover the voice coil. 5. The speaker according to claim 4, wherein a folded portion is provided on an outer periphery of the bent portion of the dust cap. 6. The speaker according to claim 4, wherein the dust cap is fitted into the voice coil and connected. 7. The loudspeaker according to claim 4, wherein at least an intermediate portion of the dust cap is provided with a bent portion having an uneven shape.