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JPS63222599

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DESCRIPTION JPS63222599
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
apparatus for supporting a vibration system of a speaker used for audio equipment, and more
specifically, a diaphragm including a dome shape is supported with good linearity so as to allow
piston movement. The present invention relates to a vibration system support device for middle
and high pitched speakers. 2. Description of the Related Art In the recent audio industry, the
spread of CD players and the emergence of DAT have resulted in high dynamic range of signals.
Under these circumstances, in order to faithfully reproduce the signal, it is desirable for the
loudspeaker to have a vibratory system supporting device in which the diaphragm vibrates in an
electrical six-way manner. Among the conventional speaker systems, a vibration system support
device called tangential edge used for a medium to high-pitched sound reproduction speaker will
be described with reference to FIG. 2 (a) is a plan view of the vibration system support device for
the speaker, and FIGS. 2 (b) and 2 (c) are cross-sectional views of the main parts thereof. An edge
portion 4 is formed between the lower end of the cylindrical portion 2 to which it is coupled and
the outer case attachment portion 3 fixed to the frame (not shown) of the speaker flush with the
lower end. It is done. The edge portion 4 is substantially in contact with the outer diameter of the
lower end of the cylindrical portion 2 and is a valley line 5 formed by a tangent line connected to
the outer pasting portion 3. A pair of V-shaped ribs are formed by two triangular flat portions 6
and 7 which are provided on both sides and which are substantially flat, and a plurality of Vshaped ribs are arranged in the circumferential direction. 6 and 7 and the outside attaching part
3 are connected by a triangular plate-like part 8. The operation of the vibration system support
device for the speaker configured as described above will be described. When an electrical signal
is applied to the voice coil, the generated driving force displaces the dome-shaped diaphragm 1
back and forth through the cylindrical portion 2 coupled to the bobbin (not shown). The edge
portion 4 enlarges the opening angle of the V-shaped rib according to the displacement of the
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cylindrical portion 2 to widen the width thereof, and enables the displacement of the domeshaped diaphragm 1. (Problems to be Solved by the Invention) However, in the above
configuration, the valley line 5 forming the V-shaped rib connects the one cylindrical portion 2
and the outer attached portion 3 by one straight line, The contact point between the valley line 5
and the cylindrical portion 2 defines a circular orbit centered on the intersection point of the
valley line 5 and the outer pasting part 3. Accordingly, the dome-shaped diaphragm 1
simultaneously moves in the back and forth direction. There is a problem that the response to
pulse-like vibration is bad because the rotational movement is performed. Furthermore, since the
above-mentioned valley line 5 is a straight line, there is also a problem that the range of the
amplitude is narrow despite the use of a 形 -shaped rib. The present invention solves the abovementioned problems. Rotational motion can be reduced or prevented, so the response to
pulsating signals can be improved to produce sounds with high-speed feeling and sufficient
amplitude even at large inputs, and distortion-free sounds at festivals. A vibration system support
device is provided.
(Means to solve the problem). In order to solve the above-mentioned problems, according to the
present invention 5, the annular inner sticking portion connected to the outer periphery of the
diaphragm is provided on the same plane as the outer sticking portion, and the circumscribed
circle and the outer sticking of the above inner sticking portion The five valleys which connect
the respective points on the inscribed circle of the part and form a V-shaped valley line on the
plane including the above-mentioned inner and outer attached parts and which are substantially
flat on both sides of the V-shaped valley line Alternatively, six triangular or quadrangular flat
portions form a V-shaped V-shaped rib forming a pair and circumferentially arrange a plurality of
V-shaped ribs to form an edge portion. It is comprised so that the broken line of the plane of two
sheets of both sides of the V-shaped valley line may be contained in the cylindrical surface
concentric with said inner and outer sticking parts, and it will become V shape. (Operation) With
the above configuration, when the diaphragm is displaced in the back and forth direction
according to the electric signal, the edge of the V-shaped V-shaped rib increases the opening
angle to enable displacement of the diaphragm, and at the same time, The rotation angle of the
diaphragm can be reduced or prevented by widening the opening angle of the V-shaped valley
line. Moreover, since the inner sticking part and the outer sticking part are connected by the
straight line and plane which bend in the middle, the range of an amplitude becomes wide.
(Embodiment) An embodiment of the present invention will be described with reference to FIG.
The figures (a), (b) and (c) are a plan view, a cross-sectional view cut along a ridge line and a
cross-sectional view cut along a valley line, respectively, of the vibration system support device of
the speaker according to the present invention. In FIG. 1 (a), the vibration system support device
of the speaker comprises an inner attaching part 9 connected to a diaphragm (not shown), and
the above inner attaching part 9 fixed to a frame (not shown) It is comprised from the outer side
adhesion part 10 which exists on one plane, and the edge part 11 which connects these. From
the point P1 on the circumscribed circle of the inner pasting portion 9, the edge portion 11 is a
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line segment 1 □ connected from the point P1 on the circumscribed circle of the inner pasting
portion 9 to the point P2 on the plane including the above inner pasting portion 9; Point P1 on
the inscribed circle in the vicinity of the point of intersection between the inscribed circle of the
outside pasted portion 10 and the center line including the above point P1. A convex polygonal
line is formed on the cylindrical surface including the point P2 on the left side of the V-shaped
valley line 12 formed by the line segment Q2 connected to the V-shaped valley line 12 and the Vshaped valley line 12 Of the two rectangular flat portions 13 and 14 and the concave line on the
cylindrical surface on the right side of the above-mentioned V-shaped valley line 12 as well. A
plurality of V-shaped V-shaped ribs formed by the shape flat portion 16 are arranged in the
circumferential direction. In addition, the V-shaped ridge line 17 is formed by the four flat
portions 13, 14. 15 and 16 of the above-mentioned adjacent V-shaped rib.
Furthermore, the outer constituent surfaces of the V-shaped V-shaped ribs adjacent to each
other, that is, the quadrangular flat portions 14 and 16 and the outer attached portion 10 are
connected by the triangular plate portion 18. The operation of the vibration system support
device for the speaker configured as described above will be described. When an electric signal is
applied to the voice coil (not shown), the driving force displaces the diaphragm (not shown) back
and forth. When the inner pasting portion 9 connected to the diaphragm is displaced back and
forth together with the diaphragm, the V-shaped rib of the edge portion widens the opening
angle and widens the width, allowing the displacement of the inner pasting portion 9 in the
longitudinal direction . At the same time, the V-shaped valley line 12 of the V-shaped rib opens
the opening angle and widens the distance between the point P1 and the point P2 at its both
ends. At that time, in the V-shaped valley line 12, a turning point is drawn in a counterclockwise
direction centering on the point P3 on the inscribed circle of the outer attached portion 10, and a
point on the circumscribed circle of the inner attached portion 9 P1 defines a clockwise circular
orbit about the above-mentioned folding point P2, so that the rotational angle of the diaphragm
connected to the inner attaching part 9 is reduced to eliminate each other. If the lengths of the
line segments Q0 and Q2 of the two inventions constituting the V-shaped valley line 12 are made
approximately equal, the rotation angle of the diaphragm can be made zero. Moreover, since the
inner attachment part 9 and the outer attachment part 10 are connected by the V-shaped rib
structure surface which has a valley line and a ridge line which has a folding point, and a broken
line, they are excellent in flexibility and the amplitude of the diaphragm is significantly increased.
It can be expanded. In the above embodiment, the inner line segment Q1 forming the V-shaped
valley line 12 is set to about 901 to 100 @ with the circumscribed circle of the inner pasting
portion 9 For this reason, although the V-shaped rib is composed of five flat portions 13, 14, 15,
16 and 18, the set angle of the line segment Q1 is set to 120 ′ to 135 ′ ′, and the inner
attached portion 9 and If the triangle plate-like part is connected between them, it will consist of
six planes, and the same effect can be obtained. In the present embodiment, although the
diaphragm is connected to the diaphragm through the inner attaching portion 9, the diaphragm
and the edge portion 11 may be directly connected and integrally molded, and a dome having a
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cylindrical portion on the outer periphery as in the conventional example. Of course, it may be
integrally formed with the diaphragm. (Effects of the Invention) As described above, according to
the present invention, since the valley line of the V-shaped rib connecting the inner and outer
attachment parts is formed in a V shape, Fluctuation occurs because the opening angle of the Vshaped rib opens and the opening angle of the V-shaped valley line opens, and the rotation
directions of the line segments that form the V-shaped valley line reverse each other to erase
each other. The rotation angle of the plate is greatly reduced, and when the lengths of the two
line segments are approximately equal, the rotation angle becomes almost zero.
Therefore, the response to the pulsatile signal is improved, and a high-speed sound can be
reproduced. Further, since the edge portion is constituted by a line segment having a break point
and a plane having a break line, the flexibility is improved and the range of the amplitude is
expanded, so that the power characteristics and the distortion characteristics are improved.
Therefore, by using the vibration system supporting device of the speaker according to the
present invention, it is possible to obtain a speaker with good responsiveness that can reproduce
a sound with high-speed feeling and excellent in power characteristics and distortion
characteristics.
[0002]
Brief description of the drawings
[0003]
1 (a), (b) and (C) are respectively a plan view of a vibration system supporting device of a speaker
according to the present invention, a sectional view including ridge lines and valley lines of an
edge portion thereof, and FIG. 2 (a).
(B) And (c) is a top view of the speaker which provided the vibration type | system | group
support apparatus of the conventional speaker, respectively, It is sectional drawing containing
the ridgeline and valley line of the edge part. 1 · · · dome-shaped diaphragm, 2 · · · cylindrical
portion, 3.10 · · · · pasting plate, 4.11 · · · edge portion, 5 · · · valley line, 6 · 7.15 · · ·・ Triangle
body flat part, 8, 18 ・ ・ ・ Triangular plate-like part, 9 ・ ・ ・ Inner pasting part, 12 ・ ・ ・
V-shaped valley line, 13.14, 16 ... quadrilateral flat part, 17 ・・ ・ ・ K-shaped ridge line. Patent
Applicant Matsushita Electric Industrial Co., Ltd. (b) (c) A-B-C Blood-staining diagram D-E-F [plane
view of f1-1-<= = knee-1-= = -9-internal stretching (1) Attached Japanese 10-outside a'l wealth
section 11 = engineering, 'i evil 12-<< 廿 13.14.16 + four P4 type W15-digon # 仄 + 酊
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