JP3985627B2 - Speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker used for various audio equipment.
[0002]
[Prior art]
The prior art will be described with reference to the cross-sectional view of the speaker in FIG. According to the figure, 1 is a magnetic circuit composed of a yoke 2, an annular magnet 3 and a top plate 4, 10 is a frame bonded to the magnetic circuit 1, and 5 is an outer periphery via an edge 6. adhesively bonded to the frame 10 Te, the inner circumference is vibration plate which is adhesively bonded to the voice coil 7 to be fitted in the magnetic gap 1a formed in the magnetic circuit, 8 so as to cover the said voice coil 7 A dust cap 9 is disposed, and a damper 9 has an outer periphery that supports the voice coil 7 so as to be movable up and down.
[0003]
When an audio signal is input to the voice coil 7 through an external input terminal (not shown), the voice coil 7 is driven up and down in accordance with the audio signal, and the diaphragm 5 is vibrated to emit sound. .
[0004]
[Problems to be solved by the invention]
In the loudspeaker configured as described above, it is ideal that the diaphragm 5 always performs a piston motion, but in reality, a split resonance occurs at a specific frequency, which causes disturbance of the frequency characteristics. In particular, the divisional resonance at the lowest frequency occurs on the outer periphery of the diaphragm 5 and becomes abnormal vibration including the edge 6, so that it is called edge resonance and has a great adverse effect on characteristics and sound quality.
[0005]
FIG. 5 shows an example of improvement in which a bent portion 11 is provided at the edge fixing portion on the outer periphery of the diaphragm 5a to improve the strength of the diaphragm. The edge 6a is fixed to the outer periphery of the bent portion 11. Therefore, although the vibration plate 5a can be reinforced, the bent portion 11 also causes the split vibration resonance, and the effect of improving the edge resonance cannot be expected so much.
[0006]
FIG. 6 is another example of improvement, in which the edge 6b is fixed so as to cover the outer periphery of the diaphragm 5b in the vicinity of the inner periphery of the diaphragm 5b or inside the node circle at the time of edge resonance. It is also possible to add an outer bent portion 12. This is an effect of improving edge resonance by not transmitting the divided vibration to the edge 6b and blocking unnecessary sound on the outer periphery of the diaphragm at the edge 6b, and the effect of improving the edge resonance is great. As a result of the covering, the width of the edge 6b becomes unnecessarily large, the efficiency is lowered by reducing the effective area of the diaphragm 5b, and the edge center holding force is lowered, which is disadvantageous to the rolling phenomenon. It was.
[0007]
Further, since the bent portion 12 on the outer periphery of the diaphragm is close to the edge 6b, there is a problem that the bending width is limited and the reinforcing effect is not sufficiently obtained, and further, it is difficult to reinforce the adhesion between the edge 6b and the diaphragm 5b.
[0008]
An object of the present invention is to provide an excellent speaker that solves such problems.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the speaker according to claim 1 of the present invention includes a magnetic circuit provided with a magnetic gap, a frame adhesively bonded to the magnetic circuit, and an adhesive bond to the frame via an edge. And a voice coil fitted into a magnetic gap of the magnetic circuit and folded downward on the outer periphery of the diaphragm. A bent portion is provided, and the inner peripheral position of the roll of the laminating portion provided extending to the inner peripheral side of the roll of the edge is matched with the bent position of the bent portion. The bonding part and the inner periphery side of the bending part of the diaphragm are bonded and fixed, and the strength of the diaphragm is reinforced by the bending part, and the edge covers the outer periphery of the bending part and is unnecessary. Sound emission In addition, the bent portion 13 is bent downward so that a sufficient bending width can be secured without considering interference with the edge 6c, and the strength of the diaphragm 5c can be further reinforced, and edge resonance can be achieved. Can also be improved.
[0010]
The speaker according to claim 2 of the present invention is the speaker having the same premise as in claim 1, wherein the outer peripheral side of the laminating portion provided extending to the inner peripheral side of the edge roll is folded. The diaphragm and the bonding part are bonded and bonded on the inner peripheral side of the diaphragm from the bending position of the bending part of the diaphragm so as to protrude outside the bending part, and the bending part and the bonding part The space part to be formed is filled with an adhesive, and by making it possible to fill the adhesive, the reinforcement between the diaphragm and the edge can be performed more easily, improving the workability of the adhesive filling work And certainty is improved.
[0011]
According to a third aspect of the speaker of the present invention, the diaphragm according to the first or second aspect is formed on the outer periphery by providing a horizontal portion continuously with the bent portion and cutting the horizontal portion. Yes, since a horizontal part is provided on the outer periphery of the cone-shaped diaphragm and the outer diameter is cut at this horizontal part, variation in cutting of the outer shape of the diaphragm can be suppressed, and workability can be improved and productivity can be improved. Is.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0013]
In the description, the same parts as those in the prior art will be denoted by the same reference numerals, and description thereof will be omitted.
[0014]
(Embodiment 1)
FIG. 1 is a side sectional view of a speaker according to an embodiment of the present invention.
[0015]
Only the differences from the prior art will be described with reference to the figure. The difference lies in the shape of the diaphragm 5c and the coupling position with the edge 6c, and the folding position of the bending portion 13 of the diaphragm 5c is the inner diameter of the roll of the edge 6c. This is a point where the bonding portion 6d of the edge 6c and the diaphragm 5c are bonded and fixed at the matching position. That is, the bending part 13 bent downward is provided on the outer periphery of the diaphragm 5c, and the inner peripheral position of the roll of the laminating part 6d provided to extend to the inner peripheral side of the roll of the edge 6c. And the folding position of the bent portion 13 are matched, and the bonded portion 6d of the edge 6c and the inner peripheral side of the bent portion 13 of the diaphragm 5c are bonded and fixed.
With the above configuration, the strength of the diaphragm 5c is reinforced by the bent portion 13, and the edge 6c covers the outer periphery of the bent portion 13 to prevent unwanted sound emission. Further, the bent portion 13 is moved downward. The bending width is sufficiently ensured without considering interference with the edge 6c, and the strength of the diaphragm 5c can be further reinforced, and the edge resonance can be improved.
[0016]
Further, the width of the edge 6c can be set regardless of the nodal circle of the diaphragm 5c as compared with the prior art of FIG. 6, and the effective area of the diaphragm 5c is not reduced, so that the efficiency is lowered and the rolling phenomenon is reduced. Suppression can be achieved.
[0017]
(Embodiment 2)
FIG. 2 is a side sectional view of another embodiment of the speaker according to the present invention. Only the differences from the first embodiment will be described with reference to the figure. The difference is that a part of the bonding part 6d of the edge 6c protrudes toward the edge 6c, and the bent part 13 and the bonding part 6d are formed. This is the point where the space 14 is filled with the adhesive 14. That is, the bending position of the bending portion 13 of the diaphragm 5c is such that the outer peripheral side of the laminating portion 6d provided extending to the inner peripheral side of the roll of the edge 6c protrudes outside the bending portion 13. The diaphragm 5c and the bonding portion 6d are bonded and bonded on the inner peripheral side of the vibration plate 5c, and the space 14 formed by the bent portion 13 and the bonding portion 6d is filled with the adhesive 14.
[0018]
By allowing the adhesive 14 to be filled, reinforcement between the diaphragm 5c and the edge 6c can be performed more easily, and the workability and reliability of the adhesive filling work are improved.
[0019]
(Embodiment 3)
FIG. 3A is a half cross-sectional view before processing of the outer peripheral portion of the diaphragm, which is a main part of one embodiment of the speaker of the present invention, and FIG. 3B is a half cross-sectional view after the processing. The third aspect will be mainly described.
[0020]
According to the figure, the diaphragm 5c used in the first embodiment and the second embodiment is a diaphragm 5d formed by a known means (resin molding, papermaking by a papermaking mold, etc.) in a cone shape (trumpet shape). When the horizontal portion 5e is formed simultaneously or the horizontal portion may be formed in a later step), the outer periphery (φD) is further cut to form the diaphragm 5c.
[0021]
Since the horizontal portion 5e is once formed at the tip of the bent portion 13 and then the outer diameter is cut at the horizontal portion 5e, variation in cutting of the outer shape of the diaphragm is suppressed, and workability is improved to improve productivity. It can be improved.
[0022]
【The invention's effect】
The speaker of the present invention configured as described above is capable of improving the edge resonance by suppressing the decrease in efficiency by fixing the laminating portion of the roll inner diameter of the edge in the bending portion of the diaphragm. To do.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of the speaker of the present invention. FIG. 2 is a side sectional view of another embodiment of the present invention. (B) Half-sectional view before processing the outer peripheral portion of the diaphragm (b) Half-sectional view after processing [FIG. 4] Side sectional view of a conventional speaker [FIG. 5] Side sectional view of the same speaker (improved example) [ Fig. 6 Side sectional view of the same speaker (improved example)
1 Magnetic circuit 1a Magnetic gap 5c Diaphragm 5d Diaphragm (before cutting outer diameter)
5e Horizontal portion 6c Edge 6d Laminating portion 13 Bending portion 14 Adhesive

Claims (3)

A magnetic circuit having a magnetic gap, a frame adhesively coupled to the magnetic circuit, a diaphragm adhesively coupled to the frame via an edge, and an inner periphery of the diaphragm are adhesively coupled, and the magnetic A speaker comprising a voice coil fitted in a magnetic gap of a circuit, provided with a bent portion bent downward on the outer periphery of the diaphragm, and extended to the inner peripheral side of the edge roll The inner circumferential position of the roll of the provided laminating portion and the folding position of the bent portion are matched, and the edge laminating portion and the inner peripheral side of the bent portion of the diaphragm are bonded and fixed. A speaker with a configuration. A magnetic circuit having a magnetic gap, a frame adhesively coupled to the magnetic circuit, a diaphragm adhesively coupled to the frame via an edge, and an inner periphery of the diaphragm are adhesively coupled, and the magnetic A speaker comprising a voice coil fitted in a magnetic gap of a circuit, provided with a bent portion bent downward on the outer periphery of the diaphragm, and extended to the inner peripheral side of the edge roll The diaphragm and the laminating portion are adhesively bonded on the inner circumferential side of the diaphragm from the bending position of the bending portion of the diaphragm so that the outer peripheral side of the bonded portion protruded outside the bent portion , A speaker having a configuration in which an adhesive is filled in a space formed by the bent portion and the bonding portion .   The loudspeaker according to claim 1 or 2, wherein the diaphragm is formed by providing a horizontal part continuously on the outer periphery of the bent part and cutting the horizontal part.

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