JP2002223495A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a narrow-width (slim) speaker used for various audio and video devices that copes with ultra-low frequency sound and a high withstanding input. SOLUTION: The speaker of this invention is structured such that a projection 11c of a voice coil 11 is inserted and coupled to a damper 12 having a through- hole 12a, then the coupling strength between the voice coil 11 and the damper 12 is enhanced and the speaker with high reliability coping with ultra-low frequency sound and high withstanding input can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a speaker used for various audio equipment and video equipment.

[0002]

2. Description of the Related Art In recent years, market demands for loudspeakers of small size, high efficiency, reproduction of heavy low-frequency sound, and high input resistance have been extremely increased. In particular, there is a remarkable demand for a slim type for video equipment which is limited in its mounting area, and various types of speaker structures have been studied in the past.

Among them, a system that drives a planar voice coil by a magnetic circuit having a slit-shaped magnetic gap is very effective as a system that can pursue the slim size to the ultimate.

A conventional slim speaker of this type will be described with reference to FIGS. 9 and 10. FIG.

FIG. 9 is an exploded perspective view of a conventional speaker, and FIG. 10 is a perspective view showing a coupling state of a voice coil and a damper, which are the main parts.

According to FIG. 1, magnets 1a and 1b magnetized in opposite directions are sandwiched between an upper plate 2 having a slit-shaped magnetic gap 2a and a lower plate 3 having a slit-shaped magnetic gap 3a. The frame 4 is adhesively bonded to the upper plate 2 of the magnetic circuit, and the diaphragm 5 is bonded to the periphery of the frame 4.
A bobbin upper part 6a of a planar voice coil 6 for driving the diaphragm 5 is coupled to the diaphragm 5, and a bobbin lower part 6b is adhesively coupled with a damper 7 and a magnetic gap 2 is provided.
a, 3a.

The loudspeaker constructed as described above emits a sound wave by moving the diaphragm 5 up and down by flowing an external audio signal through the voice coil 6.

[0008]

However, in the above loudspeaker, the voice coil 6 and the damper 7 are joined by an adhesive at the butted contact portions, and the bonding area between them is small, so that the bonding strength is weak and the bass is heavy. However, there is a problem that there is a limit in increasing the power consumption and the input resistance.

It is an object of the present invention to provide a highly reliable loudspeaker capable of improving the strength of the coupling between a voice coil and a damper and capable of reducing the weight of the loudspeaker and increasing the input resistance.

[0010]

According to the first aspect of the present invention, a voice coil is inserted into a through hole provided in a damper to connect the two together. The coupling strength of the voice coil and the damper can be improved as compared with the coupling by butting, and a highly reliable and excellent speaker that can cope with heavy bass and high input resistance can be provided.

According to a second aspect of the present invention, a constricted portion is provided in the middle of the convex portion provided at the lower portion of the voice coil according to the first aspect, and the convex portion is inserted into a through hole of a damper. The constricted part is engaged with the through-hole to connect, so that the coupling position of the voice coil can be easily set, and the coupling strength between the voice coil and the damper can be further improved to support heavy bass and high input resistance. It is possible to provide an excellent speaker with high reliability.

According to a third aspect of the present invention, the convex portion of the voice coil according to the second aspect is provided with a chamfer, and the productivity is improved by facilitating the insertion of the damper into the through hole. Therefore, it is possible to provide an excellent speaker with high reliability, which is compatible with heavy bass and high input resistance.

In the invention according to claim 4 of the present invention, the damper is inserted into the through hole provided in the voice coil and the two are coupled to each other, so that the coupling strength between the voice coil and the damper can be improved, and the bass and bass can be reduced. The present invention has the same effect as that of the first aspect in that an excellent speaker having high reliability corresponding to input resistance can be provided.

According to a fifth aspect of the present invention, a constricted portion is provided at the center of the damper of the fourth aspect, and this damper is inserted into a through-hole of a voice coil, and the through-hole is connected to the constricted portion. It can easily set the insertion position of the damper, and can further improve the coupling strength between the voice coil and the damper, and can provide an excellent speaker compatible with heavy bass and high input resistance. It is.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the prior art are denoted by the same reference numerals and description thereof will be omitted.

(Embodiment 1) FIG. 1 is an exploded perspective view of a loudspeaker according to an embodiment for mainly explaining the loudspeaker according to claim 1 of the present invention, and FIG. It is a perspective view for explaining the coupling state of a damper.

Referring to FIG. 1, only the differences from the prior art will be described. Reference numeral 11 denotes a voice coil having a convex portion 11c formed in a lower portion 11b, and 12 denotes a damper having a through hole 12a into which the convex portion 11c is inserted. is there. The voice coil 11 is supported by the damper 12 by inserting and engaging the convex portion 11 c into the through hole 12 a of the damper 12, adhesively bonding with an adhesive. As described above, since the convex portion 11c is inserted into the through hole 12a and bonded by bonding, the voice coil 11 and the damper 12
Can be improved, and high reliability corresponding to heavy sound reduction and high input resistance can be realized.

(Embodiment 2) An embodiment of a loudspeaker according to claim 2 of the present invention will be mainly described with reference to an exploded perspective view for explaining a connection between a voice coil and a damper which is a main part of FIG.

According to the figure, the difference from the first embodiment is the shape of the voice coil 21, and a point that a constricted portion 21 d is provided in the middle of the convex portion 21 c on the bottom surface 21 b of the voice coil 21. Therefore, since the constricted portion 21d and the through hole 12a are engaged with the convex portion 21c of the voice coil 21 inserted into the through hole 12a of the damper 12, the voice coil 21 does not easily come off even before being joined by the adhesive. In addition, the transfer at the time of assembly can be easily performed, and the coupling strength between the voice coil 21 and the damper 12 can be further improved.

(Embodiment 3) FIG. 4 is an exploded perspective view for explaining mainly the invention according to claim 3 of the present invention and for explaining the connection between a voice coil and a damper which is a main part. .

Referring to the figure, only the differences from the second embodiment will be described. Reference numeral 31 designates a convex portion 31c provided with a constricted portion 31d in a lower portion 31b, and a chamfer 31e in a corner at the lower end surface of the convex portion 31c. The voice coil provided. With this chamfer 31e, the through hole 1 of the damper 12 is formed.
2a, the productivity is improved, and the coupling strength between the voice coil 31 and the damper 12 is improved in the same manner as in the first and second embodiments. High reliability can be emphasized.

(Embodiment 4) FIG. 5 is an exploded perspective view of a slim-type speaker according to a fourth embodiment of the present invention mainly for describing the invention described in claim 4, and FIG. FIG. 3 is a perspective view of a voice coil and a damper, which are main parts, in a connected state.

Referring to the drawing, only the differences from the prior art will be described. Reference numeral 41 denotes a voice coil having a lower portion 41b provided with a convex portion 41c and a convex portion 41c provided with a through hole 41d. 41 is a damper that is inserted into the base member 41 and is adhesively bonded by applying an adhesive.

Since the damper 12 is adhesively bonded to the lower plate 3, the voice coil 41 is held by the damper 12.

In the loudspeaker constructed as described above, the coupling strength between the voice coil 41 and the damper 12 can be improved as compared with the conventional adhesive coupling by butt, so that the loudspeaker can be made heavy, low in input, and can withstand high input. Thus, it is possible to provide a highly reliable loudspeaker that has been realized.

(Embodiment 5) FIG. 7 is an exploded view of a voice coil and a damper, which are main parts of a slim speaker according to a fifth embodiment of the present invention. FIG. 8 is a perspective view of the same coupling state.

Only the differences from the fourth embodiment will be described with reference to FIG. 2. Numeral 12 denotes a damper provided with a constricted portion 12b at the center, and the insertion position of the damper 12 into the through-hole 41d of the voice coil 41 with the above configuration. Can be easily set, and the efficiency of the insertion operation can be improved.
2b engages with the through-hole 41d of the voice coil 41, so that it does not easily come off even before joining by applying an adhesive, so that it can be easily transported after the insertion work, improving production efficiency, and also as a speaker. It is possible to provide the same high-reliability speaker as that of the fourth embodiment, which achieves low bass and high input resistance.

[0028]

As described above, according to the speaker of the present invention, the through-hole is provided in one of the voice coil and the damper, and the other is inserted into the through-hole and coupled to improve the coupling strength. Thus, it is possible to provide a highly reliable and excellent speaker corresponding to low bass and high input resistance.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a speaker according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a connection state of a voice coil and a damper, which are main parts of the same.

FIG. 3 is an exploded perspective view of a bonded state of a voice coil and a damper, which is a main part of the other embodiment.

FIG. 4 is an exploded perspective view of a bonded state of a voice coil and a damper, which is a main part of another embodiment.

FIG. 5 is an exploded perspective view of a speaker according to another embodiment.

FIG. 6 is a perspective view of a bonded state of the voice coil and the damper, which are the main parts.

FIG. 7 is an exploded perspective view of a voice coil and a damper, which are main parts of the other embodiment.

FIG. 8 is a perspective view of the combined state.

FIG. 9 is an exploded perspective view of a conventional speaker.

FIG. 10 is a perspective view of a coupled state of the voice coil and the damper, which are the main parts.

[Explanation of symbols]

 1a Magnet 1b Magnet 2 Upper plate 2a Magnetic gap 3 Lower plate 3a Magnetic gap 4 Frame 5 Vibration plate 11, 21, 31, 41 Voice coil 11c, 21c, 31c, 41c Convex part 12 Damper 12a, 41d Through hole 12b, 21d, 31d Constriction 31e Chamfer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshihiro Oka 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Terms (Reference) 5D012 BA06 BB05 CA04 CA07 CA09 FA04 GA01

Claims (5)

[Claims] 1. A magnetic circuit having a slit-shaped magnetic gap, a frame coupled to the magnetic circuit, a diaphragm having an outer peripheral edge coupled to the frame, and a magnetic plate coupled to the diaphragm and coupled to the magnetic plate. A speaker comprising a planar voice coil inserted in a magnetic gap of a circuit and supported by a damper coupled to the magnetic circuit, wherein a through-hole is provided in the damper, and a lower portion of the voice coil is provided in the through-hole. A speaker in which a part or the whole is inserted and this damper and voice coil are combined. 2. The speaker according to claim 1, wherein a constricted portion is provided in the middle of the lower convex portion of the voice coil, the convex portion is inserted into a through hole of the damper, and the through hole is engaged with the constricted portion. . 3. The loudspeaker according to claim 2, wherein a chamfer is formed in a lower convex portion of the voice coil. 4. A magnetic circuit provided with a slit-shaped magnetic gap, a frame coupled to the magnetic circuit, a diaphragm having an outer peripheral edge coupled to the frame, and a magnetic plate coupled to the diaphragm and coupled to the magnetic plate. A speaker comprising a planar voice coil inserted into a magnetic gap of a circuit and supported by a damper coupled to the magnetic circuit, wherein a through hole is provided in the voice coil, and a damper is inserted into the through hole. A speaker combining the damper and the voice coil. 5. The speaker according to claim 4, wherein a constricted portion is provided at a center portion of the damper, the damper is inserted into a through hole of the voice coil, and the through hole and the constricted portion are engaged.