JP3735946B2 - Slender speaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elongated speaker such as an elliptical shape or a track shape used for various kinds of audio equipment and video equipment.
[0002]
[Prior art]
The conventional elongated speakers will be described with reference to the track-type speakers shown in FIGS.
[0003]
5 is a cross-sectional view in the major axis direction, FIG. 6 is a cross-sectional view in the minor axis direction, and FIG. 7 is a top view in a state where the diaphragm is removed. According to the figure, a frame 6 is coupled to an upper plate 2 of a magnetic circuit 4 constituted by sandwiching a magnet 1 with an upper plate 2 and a lower plate 3, and cone paper 7 is attached to the peripheral portion of the frame 6 by an edge 8. A bonded diaphragm 9 having a clamped structure is bonded, and an intermediate portion of a voice coil 10 for driving the diaphragm 9 is held at the center by a circular damper 11 and coupled so as to fit into the magnetic gap 5; The dust cap 12 is adhered to the upper surface of the voice coil 10.
[0004]
[Problems to be solved by the invention]
However, this type of conventional elongated speaker has a technical disadvantage that is affected by the slim shape of the track shape. As a result, it cannot secure a large amplitude of the vibration system. The problem was that it was difficult to design.
[0005]
The reason for this is that the damper 11 has a large influence on the amplitude of the vibration system of a normal slender speaker. Since the shape of this type of speaker is a track type, the outer shape of the damper 11 is circular. This is because it is limited by the dimension of the mold in the minor axis direction and a damper having a large outer dimension cannot be used. Therefore, since it is not possible to ensure a large amplitude of the vibration system, it is difficult to design a high input resistance and a high linearity.
[0006]
An object of the present invention is to solve such a conventional problem and to provide an excellent elongated speaker capable of achieving high input resistance and high linearity.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is configured such that a voice coil attached to a diaphragm having a peripheral edge coupled to a frame coupled to a magnetic circuit is fitted into a magnetic gap of the magnetic circuit, and an intermediate portion of the voice coil is held. The outer diameter shape of the damper is not a circle but a square shape, a gap is provided between adjacent sides, the corrugations of opposite sides of the quadrilateral are made the same shape, and the roll is rolled up to the short diameter side of the square frame This is a loudspeaker that is held in a frame by a damper with a down-roll-shaped corrugation part on the long diameter side, and it is possible to ensure a large amplitude by arranging the damper with a good space factor in a track-type elongated speaker. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, a voice coil attached to a diaphragm having a peripheral edge coupled to a frame coupled to a magnetic circuit is fitted into a magnetic gap of the magnetic circuit, and an intermediate portion of the voice coil is fitted. The planar shape is a quadrangle, a gap is provided between adjacent sides, the corrugations of opposite sides of the quadrilateral are made the same shape, and the up roll shape is on the short diameter side of the quadrilateral frame, and the down roll is on the long diameter side A damper with a corrugated section of shape is held in the frame, improving the space factor of the damper for the track-type elongated speaker, ensuring a large amplitude of the damper, achieving high input resistance, and short Suppresses the occurrence of rolling in the radial direction and the long axis direction, and uses the space on the long diameter side of the slim type elongated speaker to provide more damper. The space factor is improved, and the non-linearity of the up / down amplitude characteristics of the up-roll shape and the down-roll shape cancels each other, thereby improving the symmetry in the up / down amplitude and improving the linearity. a shall which have a action.
[0009]
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view in the major axis direction of an embodiment of an elongated speaker of the present invention, FIG. 2 is a sectional view in the minor axis direction, and FIG. 3 is a top view in a state where the diaphragm is removed. FIG. 4 is a perspective view of a damper which is the main part.
[0010]
A frame 26 is coupled to the upper plate 22 of the magnetic circuit 24 configured by sandwiching the magnet 21 between the upper plate 22 and the lower plate 23, and cone paper 27 is clamped to the peripheral portion of the frame 26 by the edge 28. The voice coil 30 for adhering the diaphragm 29 and driving the diaphragm 29 is held centrally by a damper 31 by a down-roll type corrugation part 31A utilizing the space on the longer diameter direction side of the frame 26 at the middle part. However, the magnetic gap 25 is coupled so as to fit in, and a dust cap 32 is bonded to the upper surface of the voice coil 30.
[0011]
The damper 31 has a lower semicircular down-roll type corrugation part 31A in the major axis direction as shown in FIG. 1, and an upper semicircular up-roll type corrugation part 31B in the minor axis direction. The opposite sides are made to have the same shape corrugation part, and a slight gap 31C is provided on the diagonal line of the quadrangular damper 31 of the planar shape of the damper 31 composed of these, except for the edges, and the up roll The degree of freedom of vibration of each of the type corrugation unit 31B and the down-roll type corrugation unit 31A is ensured.
[0012]
As described above, in the present embodiment, the damper 31 is formed into a quadrilateral shape, and a slight gap 31C is provided on the diagonal line to secure the degree of freedom of the adjacent corrugation part, thereby improving the space factor over the conventional damper. Thus, it is possible to achieve high input resistance and high linearity, and the corrugation portions facing each other have the same shape to prevent the occurrence of rolling in the minor axis direction and the major axis direction.
[0013]
Furthermore, in the above embodiment, in the short axis direction where the gap between the frame 26 and the voice coil 30 is narrow, the efficiency of the space factor of the damper 31 in the short axis direction where the gap is narrow is improved as the up-roll type corrugation part 31B. As a result, higher input resistance is improved, and non-linearity of the vertical amplitude characteristics of each of the up-roll type corrugation unit 31B and the down-roll type corrugation unit 31A is canceled (mutually complemented), thereby increasing the vertical amplitude. As a result, the linearity can be further improved.
[0014]
【The invention's effect】
As described above, the elongated speaker according to the present invention forms a speaker using a damper having a square shape and a gap between adjacent sides, thereby improving the space factor of the damper and limiting the amplitude of the damper. This can improve the input resistance.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in the major axis direction of an embodiment of an elongated speaker of the present invention. FIG. 2 is a cross-sectional view in the minor axis direction. FIG. ] Perspective view of the damper, the main part [FIG. 5] Cross-sectional view of a conventional elongated speaker [FIG. 6] Cross-sectional view in the same minor diameter direction [FIG. 7] Top view with the diaphragm removed Explanation of]
24 Magnetic circuit 25 Magnetic gap 26 Frame 29 Diaphragm 30 Voice coil 31 Damper 31A Down-roll type corrugation part 31B Up-roll type corrugation part 31C Gap

Claims (1)

A voice coil attached to a diaphragm having a peripheral edge coupled to a frame coupled to a magnetic circuit is fitted into the magnetic gap of the magnetic circuit, and at least an intermediate portion of the voice coil has a square shape in plan view, and adjacent sides. A damper with a gap between them, the corrugations of the opposing sides of the quadrilateral are made the same shape, and the up roll shape on the short diameter side of the quadrilateral frame and the down roll shape corrugation part on the long diameter side An elongated speaker held in the frame .

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