close

Вход

Забыли?

вход по аккаунту

?

JPS60176400

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS60176400
[0001]
Industrial Applicability The present invention maintains the a + 6 conical cone shape and has a
canappe structure in which a flat or substantially flat surface material is fixed on the front
surface as a diaphragm, thereby enhancing the 1-o property of the diaphragm. The present
invention relates to a flat speaker having a flat diaphragm in which the weight of the flat
diaphragm is reduced and the cost of the flat speaker is reduced. The configuration of the
conventional example and its problems The diaphragm of the speaker is ideal to take piston
action over the frequency band to be used, and the diaphragm is deformed during vibration9,
when divided vibration occurs sound pressure frequency characteristics, distortion factor (9) The
phase characteristics etc. deteriorate, which hinders high fidelity reproduction. In order to solve
these problems, in recent years, a flat diaphragm using a nick-and-sand structure or the like has
been adopted. Also, many flat speakers use an inverted conical cone-shaped transmission
member inside the node at the primary resonance frequency of the diaphragm to provide a
driving force to raise the reproduction band to near the second resonance frequency. A so-called
node drive system is used. Since the diaphragm of such a flat speaker has a honeycomb
diaphragm structure in addition to the inverted frusto-conical transmission member
corresponding to the conventional cone paper, the weight is compared with that of the cone
paper. There is a problem that the cost increases due to the decrease of the sound pressure level
which is the main performance of the speaker, or the adoption of a strong field section. A
conventional flat loudspeaker will be described below. FIG. 1 shows a cross-sectional view of a
conventional flat loudspeaker. Reference numeral 1 denotes a field portion, and a ring-shaped
magnet 4 is fixed between upper and lower gratings 2.3 to form an annular magnetic gap 5. A
frame 6 is fixed to the upper plate 2. The voice coil wire ring 8 wound around the voice coil
bobbin 7 is held in the annular magnetic air gap 5 by the damper 9 fixed to the frame 6Vc. 10 is
a flat diaphragm made of a sandwich structure, such as a front skin moon 11 and back skin
11-05-2019
1
material 12 made of a thin plate of aluminum or the like, a honeycomb core formed of a paper
impregnated with aluminum foil or a phenol resin, or expanded polystyrene Heartwood 13 is
constructed. The flat diaphragm 1o is fixed to the frame 6 through an edge 14 fixed to the
periphery. The driving force generated in the voice coil 8 is applied to the planar diaphragm 1o
by the reverse-frustal conical transmission member 15 provided between the nodal points of the
primary resonance frequency of the voice coil bobbin 7 and the planar diaphragm 1o. Scold.
Incidentally, a thin aluminum plate is generally used as the transmission member 15. The
operation of the conventional flat speaker configured as described above will be described below.
The on-axis sound pressure (Pr) of the flat disk on the infinite baffle plane is given by the
following equation (1) in a frequency band higher than the lowest co-frequency (fO) of the
loudspeaker. (N / m2-) (1) where ?0; density of air (Kq / m3), a: effective radius of diaphragm (e)
?; distance from diaphragm (e) M, 11; mass of voice coil system (Kg ) M 2: Diaphragm system
mass (K) M, A: Radiation mass (Kg) WE; Electric input ('Wat t) G; Magnetic energy (W'b 2 / m) ?;
Specific resistance (07 m). Further, the magnetic energy G is given by the equation (2), assuming
that the magnetic flux density in the annular magnetic gap is Bq (.nu.Q'b / m @ 2) + TR voice coil
volume in the TR air gap is one vGT. G = Bg-Vv ('Wb 7m) (2) Thus, the on-axis sound pressure is
inversely proportional to the mass of the vibration system and proportional to the magnetic flux
density in the annular magnetic gap. If the mass of the flat diaphragm 10 is less than the
diameter of the flat diaphragm 10 in this example, it will be 3.9 g r in the case of a diameter of
16 tm. However, the cell size of the plane diaphragm outer diameter is 121 rnm1 equidistribution aluminum honeycomb core is 4: 1. The core material thickness is 20?, and the
thickness of the skin material on the front and back with aluminum is 30?. The adhesive weight
between the front and back skin material and the core material was 20 ?m, the total thickness
of the diaphragm was 4 mm + t, and the adhesive weight between the skin material and the core
material was o and ap ?, and the adhesive weight between the core materials was ignored. In the
case of a flat speaker, the transmission unit for joint drive should be left, which is approximately
2. If it is set as Ogr, the diaphragm system weight compared with the diaphragm of the
conventional cone paper type speaker will be 5.9 gr. On the other hand, the cone paper weight of
the standard 16cn1 diameter is about 2.3 gr, and the diaphragm system weight of the flat
speaker is 2.5 times that of the cone paper. As described above, the flat speaker has a decrease in
sound pressure level due to an increase in vibration system weight, and the high and low east
density is realized by the strong field section 1 to improve and maintain the sound pressure level
at present. There is a problem such as an increase in the weight of the diaphragm resulting in an
increase in the cost of the field section 1. SUMMARY OF THE INVENTION In view of the abovementioned problems of the prior art, the present invention has been made to use a lightweight
flat diaphragm having a canappe structure which maintains a substantially frusto-conical conical
paper shape and secures a flat or substantially flat surface to the front. It is an object of the
present invention to provide a flat speaker in which the rigidity of the plate is increased to
11-05-2019
2
expand the piston area and the cost is reduced. The present invention comprises a plurality of
grooves along a radial generatrix of substantially inverted cone shape or substantially inverted
cone shape, and grooves formed along concentric or concentric square shapes intersecting the
generatrix. A driving force transmitting member comprising a flat portion formed between three
to five adjacent grooves and a substantially inverted truncated conical side wall portion opened
upward from the voice coil solid portion, and the upper surface of the flat portion At least a
circular thin plate or a substantially square thin plate or an annular thin plate, or a thin plate
having a substantially square outer shape and the thin annular plate or a thin plate having a
substantially square outer shape, m?
The speaker has a flat diaphragm made of a dome-shaped thin plate, and the rigidity of the
diaphragm is increased to expand the piston area, and the vibration pressure level is improved by
reducing the number of vibration systems, or a flat line It is intended to reduce the cost of the
speaker. Description of the real sister example Fig. 2 is a structural view showing a circular flat
diaphragm and a voice coil portion which are main parts of the flat speaker according to the first
embodiment of the present invention, and Fig. 2 (a) U front circular thin plate FIG. 2 (b) shows a
half sectional view of a partially cutaway plan view in which a part of FIG. FIG. 3 is a structural
layer of the substantially square planar diaphragm of the flat speaker of the second embodiment,
and FIG. 3 (a) is a partially cutaway plan view in which a part of the substantially square thin
plate on the front surface is cut away. Fig. 3 (b) is a half-concave view of Fig. 3 (a half-sectional
view taken along a line Q--in the direction of the diagonal ? of the driver). The first actual case
will be described below with reference to FIG. Reference numeral 16 denotes a voice coil bobbin
around which the voice coil 17 is wound. A transmission member 18 for transmitting a driving
force has the following configuration. That is, a V-shaped chest opened upward with valleys
forming concentric circles 20a, 20b, 20C, and 20d by spacing the radial generatrices 19 of the
paper sheet of substantially inverted inverted conical cone paper at intervals. 21a, 21b, 21c and
21di are provided. Furthermore, with the bus line 19 as a valley line, the voice coil fixing portion
22 [a radially extending n-shaped groove 23a and 23b opened upwards and a radially extending
n-shaped groove 24a extending from the outermost circumference concentric circle to any
concentric circle on the inner diameter side Do. Here, flat portions 25a, 25b, 25c, and 25d are
formed between the aforementioned radial n-shaped grooves 23a and the like and
circumferential n-shaped grooves 21a and the like. The central portion has a substantially
inverted conical side wall portion 26 opened upward from the voice coil fixing portion 22. The
transmission member 18 is configured by the above-described part frame, and a material such as
paper or an oren-based material containing carbon fiber is used. A circular thin plate 27 made of
the same material or aluminum as the transmission member 18 is fixed to the flat portion 25 a
and the like of the transmission member 18 and the upper end surface of the voice coil bobbin
16. The operation of the flat loudspeaker of the first actual case configured as described above
will be described below. As shown in FIG. 2, a plurality of radial n-shaped grooves 23a etc. along
the generatrix 19 of a substantially inverted frusto-conical cone paper, and V-shaped grooves
11-05-2019
3
21a etc. And flat vibration caused by fixing the circular thin plate 2R on the front surface of the
transmission member 18 consisting of the flat portion 25a and the like formed between the two
n-shaped grooves and the substantially truncated circular blood-shaped side wall portion 26 of
the central portion. The plate forms a two-layer ribbed structure so-called canappe structure to
increase the rigidity of the diaphragm.
In addition, the weight of the diaphragm is about 1.5 to 1.8 times that of the conventional cone
paper by the increase of the circular thin plate portion, and can be significantly reduced
compared to the diaphragm of the aluminum honeycomb sand inch structure. -As described
above, according to the present embodiment, the transmission member 18 having a plurality of
radial direction ? shaped vortices 23 etc. along with the conventional cone paper generating line
19 and a ? shaped groove 21a etc. such as concentric circles 20a etc. The light-weight moving
plate having a canappe structure in which the flat circular thin plate 27 is fixed to the front face
can increase the 1-ring property to expand the piston area, and can reduce the cost and realize
the plane spill force. A second embodiment will now be described. FIG. 3 is a structural view
showing the main part of a substantially square planar diaphragm according to the second
embodiment, in which a square-shaped groove concentrically provided in the first embodiment is
provided in a substantially square shape concentrically. It's nothing. 2TI: a substantially
rectangular thin plate. FIG. 4 shows the third embodiment, FIG. 4 (a) is a partially cutaway plan
view of the flat speaker in the third actual case, and FIG. 4 (b) is a half sectional view of the same.
Although FIG. 4 will be described below, the same reference numerals as in FIG. 2 are omitted. In
the present embodiment, the annular thin plate 28 is fixed to the front flat portion 26a etc. of the
transmission member 18 described above, and the outer peripheral portion of the inner hole of
the annular thin plate 28 conforms to the upper end diameter of the substantially inverted
conical side wall portion 26 described above. . A dome-like thin plate 29 has an edge 30 fitted
into the inner hole and the conical side wall 26 and a solid portion 32 fixed to the dome 31 and
the annular thin plate 28. The upper end of the voice coil bobbin 33 is not in contact with the
dome portion 31. The structure of this embodiment is an edge portion 10 of the dome-like thin
plate 29 to improve the strength at the central portion of the diaphragm, and has almost the
same effect as that of the first embodiment. A fourth embodiment will now be described with
reference to FIG. In this embodiment, the dome-like thin plate 35 is inserted and fixed to the
upper end of the voice coil bobbin 34, and the inner periphery of the annular thin plate 36
described in the third embodiment is fixed on the upper end thereof. This real case also has
almost the same effect as the first real sister. Although the third and fourth embodiments have
been described with reference to the circular flat diaphragm, it is needless to say that the
substantially rectangular flat diaphragm of the second embodiment may be implemented using a
thin rectangular plate etc. Also, although in the above example, a ? -shaped groove is used in the
actual example of the gun, a substantially V-shaped groove, a substantially U-shaped groove, or a
1II6 inverted trapezoidal groove may be used. According to the present invention, the same circle
as above and the same as above same circle as the above same circle, and reaching the
11-05-2019
4
cylindrical voice coil bobbin fixing portion, and the mutually adjacent groove and the mutually
adjacent groove open with the valley line of the approximately jW frustoconical genera. A flat
portion formed between three or five 1iJ lines, a driving force transmission member constituted
by a substantially inverted conical bottom wall portion opened upward from the voice coil bobbin
fixing portion, and the upper surface of the flat portion A flat diaphragm consisting of at least a
circular thin plate, a substantially square thin plate or an annular thin plate fixed to the outer
circumferential thin plate, and a dome-like thin plate laminated to the annular thin plate and the
inner thin plate of the outer circumferential substantially square thin plate As a result, the
rigidity of the diaphragm is enhanced and the reproduction frequency band is expanded, and a
flat speaker having a circular flat diaphragm which can reduce the cost and cost of the flat
diaphragm can be realized. .
Furthermore, by changing the concentric circle into a substantially concentric square, a square
planar speaker having the same effect can be realized, and the effect is great.
[0002]
Brief description of the drawings
[0003]
1 is a cross-sectional view of a conventional flat loudspeaker, FIG. 2 (a) is a partially cutaway plan
view of the flat loudspeaker according to a first embodiment of the present invention, and FIG. 2
(1) is a half sectional view thereof. (Fig. 3 (b) is a half sectional view, and Fig. 4 (a) is a third plan
view of the flat loudspeaker in the second actual case. FIG. 4 (b) is a half sectional view of the flat
speaker in the embodiment, FIG. 4 (b) is a partial cut plan view of the flat speaker in the fourth
embodiment, and FIG. 5 (b) is a half sectional view of the same.
18 иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии иии .... Hoisukoiru solid ??
, 25 a to 25 d и и и и и и и K Tan unit, 26 ...... substantially ?? conical body shape side wall, 2Y ...
circular thin plate 27 'River Approximately square shape, 28.36 ииииии Annular thin plate, 29, 35 иии
Dome shape provisionally. Name of Agent Attorney Nakao Toshio and 1 other person Figure 1
Figure 2 Figure 3 Figure 4
11-05-2019
5
Документ
Категория
Без категории
Просмотров
0
Размер файла
16 Кб
Теги
jps60176400
1/--страниц
Пожаловаться на содержимое документа