JPH10164691A - Speaker - Google Patents

Abstract

(57) [Summary] The present invention relates to a speaker used for various kinds of audio equipment, and an object of the present invention is to provide a small-sized speaker having good bass characteristics. SOLUTION: The speaker according to the present invention has a damper 4a which is a resin molded plate having fine voids in a mesh shape by heating and pressing a woven fabric in which fibers made of a thermoplastic resin are woven in a mesh shape.
The speaker is formed by using a small gap, and the air escapes from the minute gap, so that the air resistance is very low.In addition, the mesh-shaped gap has a light weight, so that a large compliance can be obtained and the reproduction of the bass range can be achieved. It is possible to provide a speaker that can be 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 In recent years, the field of multimedia has been remarkably developed, especially the field of information and communication. Among them, the speakers used for various audio equipments are conventional speakers having a small diameter but a thin structure, or a slim speaker having a small thickness and a small diameter, which is free to some extent as the equipment is downsized. Was. In recent years, the miniaturization of devices has been further advanced, and further miniaturized speakers have been demanded, and speakers with higher sound quality have been demanded by reproducing music and voice by mounting a CD-ROM.

[0003] A conventional speaker will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 4A is a plan view of the speaker, and FIG. 4B is a sectional side view of the same.

According to FIG. 1, reference numeral 6 denotes a vibration plate for generating air vibration, and an outer peripheral portion of the vibration plate 6 is connected to and held by the frame 1. A voice coil 5 is coupled to an intermediate portion of the diaphragm 6, and the voice coil 5 is supported by the frame 1 via a damper 4 so as to be able to vibrate. A dust cap 8 is fixed to the tip of the voice coil 5.

[0005] Wiring to the external terminals 7 is carried out by using a voice coil lead 52 from the voice coil 5 to be fixed on the vibrating plate 6 by using an adhesive and soldering to the circular eyelet 10 opened on the vibrating plate 6. The other end of the tinsel wire 51 is connected to the external terminal 7 by soldering at the same time.

On the other hand, a magnetic circuit A is constituted by a magnet 2 and a plate 3 in a central concave portion of the frame 1, and a voice coil 5 is held in a gap of the magnetic circuit A. 5, the piston 5 moves, the diaphragm 6 and the dust cap 8 vibrate, and a sound wave is emitted.

[0007]

However [0006] The conventional speaker, by being damper 4 also downsizing if made compact, resulting limits on vibration system stiffness, bass limited the lowest resonance frequency f _o Reproduction was limited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a small-sized loudspeaker having a low sound quality and capable of reproducing sound in a low-frequency range.

[0009]

In order to solve the above-mentioned problems, a speaker according to the present invention comprises a resin molded article having fine mesh-like voids formed by heating and pressing a woven fabric in which fibers made of a thermoplastic resin are woven in a mesh shape. The loudspeaker is formed by using a plate-shaped damper, which has very low air resistance because air escapes from minute gaps. It is possible to provide a speaker capable of improving the reproduction of a sound range.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention comprises a magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, a frame connected to the magnetic circuit, and a thermoplastic resin. A woven fabric in which fibers are woven in a mesh shape is heated and pressed to form a resin molded plate having minute voids in a mesh shape, and a damper whose inner periphery is connected to the voice coil and whose outer periphery is connected to the frame, Is composed of a vibration plate whose inner periphery is connected to the coil bobbin and which is connected to the above-mentioned frame, so that a resin molded plate having a fine void in a mesh shape is used as a damper, so that air escapes from the fine void, so that it is very difficult. The speaker has low air resistance, is lightweight due to the mesh-like voids, is lightweight, provides high compliance, and improves bass reproduction. Is shall.

According to a second aspect of the present invention, there is provided a magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, a frame coupled to the magnetic circuit, an inner periphery coupled to the voice coil and an outer periphery coupled to the voice coil. A damper coupled to the frame and provided with an edge portion outside the coupling portion, and an intermediate portion having one end connected to the lead wire of the voice coil and the other end connected to an external terminal mounted on the frame. Since the tinsel wire fixed to the rim portion and the diaphragm whose outer periphery is connected to the frame and whose inner circumference is connected to the coil bobbin are formed, the tinsel wire is fixed to the intermediate portion fixed to the rim portion. Since the coil bobbin side vibrates up and down with the fulcrum as a fulcrum, the vibration of the tinsel wire can also be suppressed between the intermediate portion and the external terminal. Since the receiving it is not the tinsel wire breakage prevention can be performed, and also large amplitude to a speaker compact, in which expansion and withstand input bass reproduction can be increased.

According to a third aspect of the present invention, there is provided a magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, an elongated frame coupled to the magnetic circuit and having an outer shape having a major axis and a minor axis. The inner circumference is connected to the voice coil, the outer circumference in the long diameter direction is connected to the frame, and the outer edge of the outer circumference in the long diameter direction of the frame protrudes in the short diameter direction to form a short diameter connection portion with the frame. Since a damper and a diaphragm whose outer periphery is coupled to the frame and whose inner periphery is coupled to the coil bobbin are formed, and the support of the damper in the minor diameter direction is performed by coupling with the outer peripheral portion of the outer periphery in the major diameter direction, The support of the voice coil by the damper is performed on the long diameter side, so that the vertical vibration of the voice coil can be expanded. Even if the speaker is small, the amplitude can be increased, and the reproduction of the bass range can be expanded and the resistance can be improved. One in which force can be increased.

A speaker according to an embodiment of the present invention will now be described with reference to FIGS.
This will be described below.

FIG. 1A is a plan view of a speaker according to an embodiment of the present invention, FIG. 1B is a cross-sectional view taken along a line AA in FIG. 1A, and FIG. FIG. 2B is a front view of a damper which is the main part, FIG. 2B is a side sectional view, and FIG.
FIG. 3 is an enlarged partial view of the same, and FIG. 3 is a plan view in a state where a diaphragm is removed.

Referring to FIG. 1, reference numeral 1a denotes an elongated frame having a major axis and a minor axis, and 2a denotes the frame 1a.
3a is a plate fixed on the upper surface of the magnet 2a, and the frame 1a and the magnet 2
a and the plate 3a constitute a magnetic circuit Aa.
Reference numeral 4a denotes an elongated damper similar to the frame 1a, and the inner periphery is fixedly supported by the voice coil 5a and the outer periphery is fixedly supported by the frame 1a. Reference numeral 7a denotes an external terminal, which is fixed to the back surface of the frame 1a and a tinsel wire 51a of the voice coil 5a.
Is coupled and conducted. 8a is a dust cap fixed to the voice coil 5a to prevent foreign matter from entering the magnetic circuit Aa;
9a is a gasket fixed to the frame 1a with the diaphragm 6a interposed therebetween.

The damper 4a is provided with four projecting portions 41 at a part of the outer peripheral portion of the outer periphery in the longitudinal direction of the damper 4a in the minor diameter direction, and the projecting portions 41 are provided on the inner wall of the frame 1a as shown in FIG. 41 are connected.

As described above, by connecting the projecting portion 41 of the elongated damper 4a to the inner wall of the frame 1a, the fixing position with the frame 1a can be easily determined, and the fixing can be performed without using a jig in production. In addition to supporting the voice coil 5a by the damper 4a, the support of the voice coil 5a by the damper 4a is performed on the long diameter side. The vibration in the vertical direction of the voice coil 5a can be increased, the amplitude can be increased even if the speaker is downsized, and the reproduction of the bass range can be expanded.

The state of formation of the damper 4a will be described with reference to an enlarged partial view of the damper 4a shown in FIG. 2C. The damper 4a heats and presses a woven fabric in which fibers made of a thermoplastic resin are woven in a mesh shape. It is formed as a resin molded plate having minute voids in a mesh shape. As can be seen from this, air can be easily removed from the mesh portion, very low air resistance, and the mesh shape can reduce the weight. Since the air resistance is small, a large compliance can be obtained even with a small-sized speaker, and the reproduction in a low-frequency range can be improved.

2 (a) and 2 (b), the corrugation 42 of the vibrating portion of the damper 4a extends concentrically with the inner circumferential circle, and is formed by cutting both ends of a circular damper. However, as described above, since the damper 4a is formed of a resin molded plate, even if the damper 4a is cut, post-processing is not required on the cut end surface, and the damper 4a can be formed very easily.

As described above, the present invention enables the damper 4a to have low air resistance, to be lightweight, to have high compliance, and to be able to produce a molding die at low cost.

Further, the damper 4a is shown in FIG.
According to FIG. 2 (b), the voice coil 5a is connected to an edge 43 provided on the outer periphery of the outer periphery of the damper 4a coupled to the frame 1a and higher than the corrugation 42 outside the joint 4b between the frame 1a and the damper 4a. The tinsel wire 51a is fixed, and the tinsel wire 51a is supported and wired in the space between the vibration plate 6a and the vibrating part of the damper 4a, and is connected and conducted to the external terminal 7a. Thus, the tinsel wire 51 from the voice coil 5a is provided on the rim 43 of the outer periphery of the damper 4a.
By affixing a, the tinsel wire 51a vibrates up and down on the voice coil 5a side with the middle part fixed to the rim 43 as a fulcrum. Also, since it is disposed between the voice coil 5a and the diaphragm 6a and is not affected by the deformation of the diaphragm 6a when vibrating, the breaking of the tinsel wire can be prevented, so that even if the speaker is small, the amplitude can be increased. Thus, it is possible to expand the reproduction of the bass range and increase the input resistance.

Although the above-described embodiment has been described with respect to the elongated speaker, the configuration in which the intermediate portion of the tinsel wire 51a is fixed to the rim 43 of the damper 4a and the effect obtained thereby are the same as those of the conventional technology. The present invention can also be applied to a speaker.

Further, it is also applicable to the general speaker described in the prior art that the damper 4a is formed into a resin molded plate having fine voids by heating and pressing a woven fabric in which fibers are woven in a mesh. It is possible to provide a compact speaker having good bass characteristics.

[0024]

As described above, the loudspeaker of the present invention uses a damper which is a resin molded plate having fine voids in a mesh by heating and pressing a woven fabric in which fibers of a thermoplastic resin are woven in a mesh. It has a speaker and has very low air resistance because air escapes from a minute gap.
In addition, since the mesh-like structure has voids, it is light in weight, has high compliance, and can improve reproduction in a low-frequency range.

[Brief description of the drawings]

FIG. 1A is a plan view of a speaker according to an embodiment of the present invention. FIG. 1B is a cross-sectional view taken along line AA in FIG.

FIG. 2 (a) is a front view of a damper as an essential part of the same, (b) a sectional side view thereof, and (c) an enlarged partial view thereof.

FIG. 3 is a plan view showing a state where a diaphragm is removed.

4A is a plan view of a conventional speaker, and FIG.

[Explanation of symbols]

 1a Frame 2a Magnet 3a Plate 4a Damper 5a Voice Coil 6a Diaphragm 43 Ridge 51a Kinshi Aa Magnetic Circuit

Claims (3)

[Claims] 1. A magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, a frame connected to the magnetic circuit, and a fabric in which fibers of a thermoplastic resin are woven in a mesh form are heated and pressed. A damper which is formed as a resin molded plate having minute voids in a mesh shape and whose inner periphery is coupled to the voice coil and whose outer periphery is coupled to the frame, and whose outer periphery is coupled to the frame and whose inner periphery is coupled to the coil bobbin. Speaker comprising a vibrating plate. 2. A magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, a frame coupled to the magnetic circuit, an inner periphery coupled to the voice coil and an outer periphery coupled to the frame. A damper provided with a rim on the outside of the joint portion, and an intermediate portion having one end connected to the lead wire of the voice coil and the other end connected to an external terminal mounted on a frame are fixed to the rim. And a diaphragm having an outer periphery connected to the frame and an inner periphery connected to the coil bobbin. 3. A magnetic circuit, a voice coil inserted into a gap of the magnetic circuit, an elongated frame coupled to the magnetic circuit, the outer shape of which has a long diameter and a short diameter, and an inner periphery of the voice coil. A damper which is joined to the frame so that the outer periphery in the major diameter direction is joined to the frame, and the outer periphery of the outer periphery in the major diameter direction projects in the minor diameter direction to form a joint in the minor diameter direction with the frame; And a diaphragm having an inner periphery coupled to the coil bobbin.