JPH0633755Y2 - Speaker structure - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to the structure of a speaker, and in particular, a suspension of a vibration system is arranged in a magnetic circuit and the outer peripheral portion of the suspension is The present invention relates to a structure of a loudspeaker of a type that is sandwiched directly or with a packing material between an outer peripheral portion of a guide ring member fitted to a yoke pole portion and a magnetic circuit constituent member.

(Prior Art) In order to facilitate the assembly of a speaker, we have arranged a vibration system suspension in a magnetic circuit and fitted a guide ring member to the yoke pole part, and to the outer peripheral part and the magnetic circuit. Various types of speakers have been proposed in which the outer peripheral portion of the suspension is sandwiched between the constituent members directly or through a packing material.

An example thereof will be described with reference to FIGS. 5 to 7. The diaphragm 21, the voice coil bobbin portion 22 and the suspension 23 at the lower end thereof are integrally molded, and the guide portion 24 is formed on the outer peripheral portion of the suspension 23. By fitting the guide portion 24 to the guide portion 35 formed on the lower surface side of the top plate 34 and the guide portion 37 formed on the outer peripheral portion of the guide ring member 36, the guide portion 24 of the suspension 23 is guided by the guide ring member 36. It is sandwiched between the outer peripheral portion of and the lower surface of the top plate 24, and in this state, the inner peripheral portion 38 of the guide ring member 36 is fitted to the outer peripheral portion of the yoke pole portion 32 to be assembled. The suspension 23 is disposed on the magnetic head 26, the magnetic gap 26 is accurately held, and the voice coil 25 is supported at the center of the magnetic gap 26. Reference numeral 31 is a yoke, and 32a is a yoke pole portion 32 so that the guide ring member 36 can be fitted to a predetermined position.
An engaging step portion formed on the outer periphery of the magnet 33 is a magnet.

In the speaker having the above structure, the guide ring member 36 is used as a method for adjusting the sound quality under a certain condition.
By forming a hole 39 as shown in FIG. 7 in advance and adjusting the minimum resonance frequency by increasing or decreasing the cavity volume, it is possible to deal with characteristic improvement and sound quality adjustment relatively easily.

(Problems to be solved by the invention) However, the method of forming the holes 39 in the guide ring member 36 has the following drawbacks.

That is, in the speaker having the above-mentioned configuration, the guide ring member 36 is arranged inside the magnetic circuit, so that there is a structural limitation and the magnetic circuit is inevitably made as small as possible in consideration of cost. In many cases, the width of the guide ring member 36 is also narrow. Therefore, drilling the hole 39 in such a narrow guide ring member 36 requires delicate processing, not only increases man-hours and costs, but also increases the opening area required for ensuring performance. It was not possible to obtain it, and it was possible to open only a limited number of holes.

The present invention has been made in view of this point, and its purpose is to achieve the same effect as a state in which the guide ring member is perforated at low cost without perforating the guide ring member. Another object of the present invention is to provide a speaker structure capable of improving characteristics and adjusting sound quality with a simple configuration.

[Configuration of Device] (Means for Solving the Problems) In the structure of the speaker according to the present invention, the suspension supporting the diaphragm and the voice coil bobbin is arranged inside the magnetic circuit and fitted to the yoke pole portion. In a speaker in which the outer peripheral portion of the suspension is sandwiched between the outer peripheral portion of the guide ring member and the magnetic circuit component member, the speaker is divided into either the outer peripheral portion of the yoke pole portion or the inner peripheral portion of the guide ring member. Is provided with a plurality of convex portions, and the cavity volume is set to be increased or decreased by the area of the gap formed between the yoke pole portion and the guide ring member by the convex portions.

(Operation) It is easy to provide a plurality of convex portions on the outer peripheral portion of the yoke pole portion or the inner peripheral portion of the guide ring member, and any type does not significantly increase the cost.

The speaker assembling process is the same as the conventional one, and the guide portion formed on the outer peripheral portion of the suspension is sandwiched between the outer peripheral portion of the guide ring member and the magnetic circuit constituent member directly or via a packing material. In this state, the inner peripheral portion of the guide ring member is fitted to the yoke pole portion and assembled.

As a result, the suspension is arranged inside the magnetic circuit, the magnetic gap is accurately held, and the voice coil can be supported at the center of the magnetic gap.

In the speaker assembled as above,
Since a gap is formed between the yoke pole portion and the guide ring member, it is possible to obtain the same effect as that of forming a hole in the guide ring member as in the conventional case. Therefore, the characteristics and the sound quality can be easily adjusted by arbitrarily setting the shape and the number of the convex portions and adjusting the opening area of the gap.

(Embodiment) An embodiment of the structure of the speaker according to the present invention will be described with reference to FIGS.

FIG. 1 is a sectional view when a convex portion is provided on the outer peripheral portion of the yoke pole portion, FIG. 2 is an exploded sectional view showing an essential portion of the same, and FIG. FIG. 6 is an exploded perspective view of a main part when a convex portion is provided on the inner peripheral portion of the guide ring member.

In the figure, 1 is a yoke, 2 is a yoke pole portion, 3 is a magnet, and 4 is a top plate.

The assembly structure of the speaker is similar to that of the conventional one shown in FIGS. 5 and 7, and the vibration system is such that the diaphragm 11, the voice coil bobbin portion 12 and the suspension 13 at the lower end thereof are integrally molded and the outer periphery of the suspension 13 is formed. The above-mentioned suspension is formed by forming a guide portion 14 on the bottom portion of the top plate 4 and fitting the guide portion 14 on the guide portion 5 formed on the lower surface side of the top plate 4 and the guide portion 7 formed on the outer peripheral portion of the guide ring member 6. The guide portion 14 of 13 is sandwiched between the outer peripheral portion of the guide ring member 6 and the lower surface of the top plate 4, and in this state, the inner peripheral portion 8 of the guide ring member 6 is fitted to the outer peripheral portion of the yoke pole portion 2. It is assembled. As a result, the suspension 13 is arranged inside the magnetic circuit, the magnetic gap 16 is accurately held, and the voice coil 15 is held in the magnetic gap 16.
It is configured to support in the center of.

In this invention, a plurality of convex portions 9 or 10 are provided on either the outer peripheral portion of the yoke pole portion 2 or the inner peripheral portion of the guide ring member 6 so as to divide the yoke pole portion 2 and the convex portion 9 or 10. Space S formed between the guide ring member 6 and
It is configured such that the cavity volume is set to be increased or decreased depending on the area.

In the example of FIGS. 1 to 3, four convex portions 9 are provided on the outer peripheral portion of the yoke pole portion 2 in a divided manner, and in the example of FIG. 4, on the inner peripheral portion 8 of the guide ring member 6. The four convex portions 10 are provided in a divided manner.

Providing the convex portion 9 on the outer peripheral portion of the yoke pole portion 2 can be easily performed by cold forging, and the guide ring member 6
When the convex portion 10 is provided on the inner peripheral portion 8, the guide ring member 6 can be processed simultaneously with punching. Therefore, there is no significant increase in cost in any of the formats. Also, the assembling of the respective constituent members is performed simultaneously with the conventional method.

It should be noted that as another form of holding and holding the suspension 13, there is a case of holding the suspension 13 via a packing material.

[Advantage of Invention] According to the structure of the speaker of the present invention, the outer peripheral portion of the suspension of the vibration system is sandwiched between the outer peripheral portion of the guide ring member and the magnetic circuit component, and in this state, By assembling the peripheral portion with the yoke pole portion, it can be easily assembled as in the conventional case, and in the speaker thus assembled, a gap is formed between the yoke pole portion and the guide ring member. Therefore, it is possible to obtain the same effect as that of forming a hole in the guide ring member as in the related art.

Therefore, it is not necessary to form a hole in the guide ring member having a narrow width, and it is possible to easily improve the characteristics and adjust the sound quality by arbitrarily setting the shape and the number of the convex portions and adjusting the opening area of the gap. There is an effect that can be done.

The means for providing the convex portion on the outer peripheral portion of the yoke pole portion or the inner peripheral portion of the guide ring member can be easily formed by cold forging or punching, and does not particularly increase the cost. Optimal.

[Brief description of drawings]

1 to 4 show an embodiment of the structure of the speaker according to the present invention. FIG. 1 is a sectional view when a convex portion is provided on the outer peripheral portion of the yoke pole portion, and FIG. FIG. 3 is an exploded sectional view showing the same, FIG.
FIG. 4 is an exploded perspective view of a main portion when a convex portion is provided on the inner peripheral portion of the guide ring member. 5 to 7 show the structure of a conventional speaker.
The drawing is a cross-sectional view, FIG. 6 is an exploded cross-sectional view showing a main part, and FIG. 7 is a perspective view of the main part showing a state in which a hole is formed in a guide ring member. 1: yoke, 2: yoke pole part, 3: magnet 4: top plate, 5,7,14: guide part 6: guide ring, 8: inner peripheral part, 9,10: convex part 11: diaphragm, 12: Voice coil bobbin 13: suspension

Claims (1)

[Scope of utility model registration request] 1. A suspension for supporting a diaphragm and a voice coil bobbin is disposed inside a magnetic circuit, and the outer peripheral portion of the suspension is provided between the outer peripheral portion of a guide ring member fitted to a yoke pole portion and the magnetic circuit constituent member. In a speaker in which a plurality of convex portions are sandwiched between the yoke pole portion and the guide ring member, a plurality of convex portions are provided in a divided manner on either the outer peripheral portion of the yoke pole portion or the inner peripheral portion of the guide ring member. A structure of a speaker characterized in that it is configured to increase / decrease a cavity volume by an area of a void formed between and.