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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker apparatus in which a coupler and an imaging plate are firmly attached to improve
the input resistance. [Prior Art] In a conventional speaker device, for example, a flat diaphragm
(1) as shown in the longitudinal sectional view of FIG. There is also a speaker system. This
speaker device comprises a yoke (4) having a center pole (3) protruding at the center of the
bottom of the frame (2), an annular magnet (5) disposed on the yoke (4), and an additional
arrangement thereon A magnetic circuit comprising the annular plate (6) is installed. Also, in the
magnetic gear tube G of the magnetic circuit section? A gace coil loosely inserted in the center
pole (3) so that the is coil part (7) is positioned in the bin (8), and the frusto-conical shape
opened with the coil attached to the top of the bin (8) A vibration system part comprising a
coupler (9) formed in a cylindrical shape and a flat plate vibration (1) of a honeycomb core
structure attached to the upper end of the coupler (9) is formed by Danno 46 (J? イスコイル?
The portion of the bottle (8) is resiliently supported to the frame (2), and the portion 1 elastic nip
(11) of the flat plate diaphragm (1) is resiliently supported to the frame (2) It is configured to be
able to vibrate in the arrow A direction. Such a conventional speaker apparatus that constitutes
an imaging system such as the flat diaphragm (1) and the coupler (9) must be light in weight and
rigid to improve the speaker characteristics. For this reason, the coupler (9) is adhered to the flat
diaphragm (1) using a small amount of an epoxy or rubber adhesive in a necessary amount so as
not to increase the transmission loss of vibration. [Problems to be Solved by the Invention] In the
case where the coupler (9) is attached to the flat plate diaphragm (1) using an adhesive as
described above, in particular, a flat plate diaphragm having a honeycomb core structure made of
aluminum and two-two cumum. (1) When the K aluminum coupler (9) is attached, the adhesive
does not penetrate into the surface of the aluminum plate, so the adhesive strength is not
sufficient, and once a part is peeled off, a large input to the speaker device There was a problem
that the whole was easy to exfoliate at once. The present invention aims to solve the abovementioned drawbacks. [Means for Solving the Problems] In the speaker device of the present
invention, a small hole or groove for bonding is appropriately provided on the sticking portion of
the diaphragm (1) or the coupler (9), and the adhesive 3N) It is characterized in that it is inserted
into the small holes or grooves for sticking. [Function] Since the adhesive Q 侵入 intrudes into
and adheres to the bonding small hole or groove of the bonding portion in this manner, the
adhesive strength is set so that the adhesive Q υ does not peel off even when the speaker device
receives a large input. It has an action to improve.
An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
FIG. In addition, the same reference numerals are given to the parts corresponding to FIG. 5 in
FIGS. 1 to 4 to facilitate the explanation. FIG. 1 is a perspective view showing a flat plate
diaphragm (1) and a coupler (9) which are main parts of the speaker device of this example, and
this flat plate diaphragm (1) has a honeycomb core structure made of aluminum. The coupler (9)
is also formed in the same cylindrical shape as the truncated cone made of aluminum, and a
flange-like sticking portion (2) is formed on the upper end of the coupler (9), In this example, as
shown in FIG. 2, the flange-like sticking portion (2) is a thin section having a U-shaped cross
section which also serves as a reinforcing structure along a central portion shown by a dashed
dotted line (2) (see FIG. 1). A groove (c) is formed. Also, as shown in FIG. 1, on the back of the flat
plate diaphragm (1), a circular shaped corresponding portion to which the 7-inch attachment
portion @ of this coupler (9) is attached Drill a plurality of bonding holes (a). The small bonding
holes (1) are small holes which are bored so as to pass through only the back surface side skin
material (c) of the flat diaphragm (1) as shown in FIG. Further, the bonding small holes are
formed such that one bonding small hole is formed per one hexagonal small part-shaped cell
surrounded by the core material (c) of the honeycomb core structure. Drill at a corresponding
density. And, in order to stick the flat diaphragm (1) by force (9), first apply an adhesive avm to
the flange-like sticking part of the coupler (9), and then the flat diaphragm (on it) 1) Position Y so
that the part where the small hole for adhesion 9rJ is drilled hits the 7 flange-like sticking part 4
of the coupler (9) and pupils, and put it on the upper part of the flat plate diaphragm (1)! Place
and press. Then, as shown in FIG. 2, the adhesive (2) intrudes into the cell from a small bonding
hole, and spreads and solidifies in the condylar shape of a rivet and fixes as riveted. , Stick to the
plane of the back side skin material (2). Furthermore, the flat portion of the flange-like adhesive
portion (2) of the coupler (9) is pressed and adhered also into the #i groove (c) to improve socalled biting of the adhesive Q]) and bond strength 'It will increase by lk. In addition, adhesive
Q1) using ultrasonic waves and high frequency! It may be easy to intrude into the bonding
stoma. In addition to the above-mentioned configuration, as shown in Fig. 3 in addition to the
above-mentioned configuration, a plurality of bonding small holes @ may be provided at
appropriate positions along a portion indicated by a dashed dotted line in the middle of the
coupler Pre-drill. When the adhesive (2) is attached, the adhesive (c) is formed into a condyle
shape of a rivet from the small hole for bonding of the back surface side skin material (c) of the
flat plate diaphragm (1) Similarly to this, the adhesive eη penetrates the condylar shape of the
rivet from the bonding small hole of the flange-like sticking part (2) and spreads and adheres.
The adhesive easily bonds the flat surface of the skin material ()) and the flat surface of the 7range attachment part (2), and bonds more firmly than shown in FIG. It can be done. In the
above-mentioned embodiment, although the small holes for adhesion {circle around (1)} and @
for small diameter @ have been described as being arranged in a circular row, they may be
arranged in a plurality of rows. Although not shown, in the case of a speaker device using a flat
plate made of expanded polystyrene resin instead of a flat plate made of honeycomb core
structure, a circular U-shaped groove is formed at a predetermined position of the flat plate made
of expanded polystyrene resin. Alternatively, a plurality of arc-shaped U-shaped grooves may be
provided as a substitute for the small bonding holes, and adhesion may be reinforced even if it is
configured to improve the adhesion strength. Furthermore, since the configuration other than
that described above is the same as that of the conventional speaker device shown in FIG. 5
described above, the description thereof will be omitted. In this way, the small hole for adhesion
is made so that the adhesive (good) goes around to the back side, or the groove is formed so that
the adhesive penetrates into the groove (the adhesive strength if it is fixed) As a result, there is
no concern that the sticking portion between the flat plate diaphragm (1) and the coupler (9) will
be peeled off, and the input resistance of the speaker device can be improved. Next, a method for
forming a plurality of bonding small holes in a flat plate diaphragm (1) of a honeycomb core
structure will be described. In this example, the process is performed in combination with the
process of attaching the nip α around the flat diaphragm (1). First, the lower mold 1 is provided
with a rectangular recess On ′ to accommodate the flat diaphragm (1), This concave portion 6])
A plurality of bonding small hole drilling bins 0 are provided in a fixed position on the inner
chamber. Further, a round protrusion-like holding portion 01t- is installed around the recess
portion 0 支持 to support the nip portion 倶. Further, in the upper mold (b), a suppression
surface (d) to hold the flat diaphragm (1) and an n-shaped recess (t) to hold the edge a force are
formed. Then, store the flat diaphragm (1) in the rectangular recess 0 eta of the lower mold (1),
apply an adhesive to the inner flat surface bottom 0 force of the nip (b), and surround the flat
diaphragm (1) Position and put. Furthermore, when the upper mold 04Y is covered and pressed,
the nip α ニ ッ プ is attached to the flat plate diaphragm (1), and at the same time, the bonding
small hole (a) can be drilled in the flat plate diaphragm (1). . According to this method, the
bonding small hole (1) can be formed by the same operation as the conventional speaker
manufacturing operation, and the number of manufacturing processes can be increased. [Effects
of the Invention] As described above in detail, according to the speaker device of the present
invention, bonding small holes are made in the bonding portion between the diaphragm and the
coupler, or adhesion strength is increased by providing grooves. Therefore, there is an effect that
the input resistance l of the speaker device can be improved.
Brief description of the drawings
FIG. 1 is a perspective view showing a diaphragm and a coupler which are the main parts of the
speaker device of the present invention, and FIGS. 2 and 3 are enlarged longitudinal crosssectional views illustrating the bonding portion 1 of the diaphragm and the coupler of this
example. FIG. 4 is a schematic explanatory view showing an example 1 of a method for forming a
bonding small hole in a diaphragm, and FIG. 5 is a longitudinal sectional view showing an
example of a conventional speaker device.
(1) is a flat diaphragm, (9) is a coupler, (1) is a bonding small hole,-is an adhesive, and a ridge is a
bonding small hole. (Fig. 2) Fig. 4 Fig. 5 (Procedure)% formula% 2, name of invention speaker
device 3, relationship with person making corrections Patent applicant location Tokyo for parts 8
north Item 6-chome 7-35 name (21 B) Sony Corporation Representative director Norihiro Oga 4,
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