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JPH0560088

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DESCRIPTION JPH0560088
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker capable of shortening and improving the manufacturing process by using a novel
material and a UV curing adhesive as a method of bonding a diaphragm and a gasket. The
present invention relates to a speaker having a curved surface having a convex radius toward the
outside, and a concave portion of a pool of adhesive to reduce bill defects and achieve stable and
improved quality.
[0002]
2. Description of the Related Art A conventional speaker of this type mainly comprises an
ordinary solvent-based or emulsion-based adhesive on the outer edge of an outer frame of an
iron frame, and the edge of a conical diaphragm. A sticking portion was adhered, and a flat
annular gasket made of paper or the like was thermally cured and adhered thereon, and then
adhered.
[0003]
Therefore, in the conventional loudspeaker of this type, since the gasket is made of opaque
opaque paper, etc., in the process of bonding the gasket, the adhesive is hardened. In addition,
the reliability of the adhesive strength of the adhesive is thin, and among such adhesives, the
elastomer adhesive peels off due to poor adhesion and is not It is the cause of the failure etc.
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The main cause of this is considered to be a lack of adhesive strength between the edge portion
of the diaphragm and the gasket or a slight leak at the time of applying the adhesive.
[0004]
Therefore, the present invention does not use an organic solvent but uses a UV curable resin in
order to solve the problems of the conventional speaker manufacturing process, and the drying
time is By shortening and shortening the working process, the working process is simplified and
the working time is shortened, and the shape of the gasket and the adhesive are improved, and
the solidification of the adhesive proceeds more completely. The purpose of the present
invention is to provide a speaker with improved adhesive strength and improved quality of a
product speaker.
[0005]
In order to achieve the above object, the configuration of the present invention for achieving the
object is shown in FIGS. 1 (a), 1 (b) and 2 (a), 2 corresponding to the embodiments. Explaining
using (b), the present invention adheres the edge affixing portion (3a) of the conical diaphragm
(3) onto the affixing portion of the outer edge of the frame (1), and And the gasket (4) of the
speaker, which is between the edge sticking part (3a) of the diaphragm (3) and the synthetic
resin gasket (4) capable of transmitting UV light (UV curable adhesive ( 5) is applied and cured
by bonding UV light, the cross-sectional shape of the gasket (4) is formed into a curved surface
(4a) having a convex radius toward the outside, and This is a speaker having a gasket having a
shape in which the inner corner is dropped to form a recess (4b) of the adhesive reservoir.
[0006]
Since the present invention is a speaker having such a structure, the edge sticking portion (3a) of
the conical diaphragm (3) is adhered onto the outer edge portion of the frame (1). After that, a
UV curable adhesive (5) is applied onto the edge affixing portion (3a) of the diaphragm (3), and a
UV ray transparent synthetic resin upper gasket (4a) is further applied thereon. ), And apply UV
rays.
[0007]
Therefore, in the speaker according to the present invention, as described above, UV light is
transmitted through the transparent synthetic resin gasket (4a) and irradiated to the UV curable
resin adhesive (5) on the lower surface. , UV curable adhesive (5) can be cured.
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At that time, a cross-section of the gasket (4) is applied to a speaker which is coated with a UVcurable adhesive (5) between a UV-ray transparent synthetic resin gasket (4) and irradiated with
UV light for curing. With the curved surface (4a) having a convex radius toward the outer side,
the curved surface acts as a convex lens, and the UV light irradiated from above passes through
the gasket (4), and the UV curing type By concentrating on the adhesive coated surface to which
the adhesive is applied, the adhesive can be sufficiently solidified to strengthen the adhesion.
Also, by pouring a similar UV curing adhesive into the recess (4b) in which the inner corner of
the adhesive surface of the gasket (4) is dropped, a pool of the adhesive can be formed, and the
viscoelasticity causes vibration. It is possible to prevent the edge of the plate (3) from being
flickered.
In this manner, strong adhesion between the edge portion (3a) of the diaphragm (3) and the
gasket (4a) can be obtained in a short time with little effort, and the quality of the product
speaker is improved Can be
[0008]
FIG. 1 (a) is a view showing the cross-sectional structure of one embodiment of the present
invention, FIG. 1 (b) is a partially enlarged view, and FIG. 2 (a) is a view showing the same. FIG. 2
(b) is a partially enlarged view of the speaker according to another embodiment of the present
invention. The speaker is generally mounted on the frame (1) concentrically with a magnetic
circuit (12) forming an annular magnetic air gap (11). (3)A voice coil (13) is wound around the
center hole and a voice coil bobbin (14) with a damper (15) attached to the middle part is
attached to the central hole. 13) The magnetic gap (11) is supported by a damper (15) whose
edge is attached to the frame (1) with an adhesive so as not to touch the pole wall. Then, at the
time of assembly, as described above, the edge affixing portion (3a) of the conical diaphragm (3)
is adhered onto the outer edge of the frame (1) to which the magnetic circuit (12) is attached. In
the speaker manufacturing process for bonding the gasket (4), UV curing is performed between
the edge bonding part (3a) of the diaphragm (3) and the gasket (4) made of a synthetic resin
capable of transmitting UV light A mold adhesive (5) is applied and UV light is transmitted
through the gasket (4) by a UV light irradiation device (6) to cure and bond the adhesive (5).
[0009]
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According to the speaker of the present invention, the edge sticking portion (3a) of the conical
diaphragm (3) is bonded onto the sticking portion of the outer edge of the frame (1) and the UV
light is transmitted. While making the cross-sectional shape into a curved surface (4a) having a
convex radius toward the outside, the inner corner of the bonding surface is dropped to make the
recess of the adhesive reservoir (4b) possible. Place a gasket in the shape of a), apply a UV
curable adhesive (5) between the edge sticking part (3a) of the diaphragm (3), and apply a UV
ray to cure the adhesive Speaker
[0010]
Although the embodiments considered to be representative of the present invention have been
described above, the present invention is not necessarily limited to only the structure of these
embodiments, and includes the above-mentioned components according to the present invention,
and In order to achieve the purpose of the present invention, the present invention can be
appropriately modified and implemented within the scope having the following effects.
[0011]
As is apparent from the above description, according to the present invention, the UV curable
adhesive (5) is coated on the edge affixing portion (3a) of the diaphragm (3). Furthermore, since
an upper gasket made of a synthetic resin capable of transmitting UV light is placed thereon, and
the adhesive (5) is solidified by irradiating the UV light, the synthetic resin which can transmit
the UV light When it passes through the gasket made of resin, it easily penetrates, and it is
efficiently irradiated on the bonding surface under the action of the convex lens by the outer
curved surface (4a) of the gasket (4), and curing of the adhesive (5) Progresses sufficiently in a
short time, and as a result, the strong adhesion between the edge portion (3a) of the diaphragm
(3) and the gasket does not require a heating device or heating time. To have remarkable effects
that can not be expected from the conventional one, such as simplification of work processes. It
has come to an end.
[0012]
Further, in the speaker according to the present invention, as described above, the material of the
gasket (4) is made of a material easily transmitting UV light, and the cross-sectional shape is a
curved surface (4a) having a convex radius toward the outside. Forming a recess (4b) of the
adhesive pool by dropping the inner corner of the adhesive surface, and a UV curable adhesive
(5) having high adhesive strength and tackiness. Since it is used for coating, it retains its
viscoelasticity even after curing and does not solidify, so the adhesive (5) leaks and is softer than
the edge portion (3a) of the diaphragm (3), so the edge portion ( Even if it abuts on 3a), since no
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rattling noise is generated, the effect that the quality of the product speaker can be improved can
also be expected.
Then, apply a UV curing adhesive (5) to the inner concave part (4b) of the bonding part between
the diaphragm edge part (3a) and the gasket (4) to divert it as a sealing material for preventing
billy vibration. You can also
[0013]
Furthermore, since the adhesive (5) is non-solvent type and is not thermosetting type, the edge
portion (3a) of the diaphragm (3) is not adversely affected chemically and thermally. It is a
speaker that can expect a remarkable effect in practical use.
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