JP2744393B2 - Speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker which is continuously used in an atmosphere at a high temperature of, for example, 150.degree.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of a conventional speaker disclosed in Japanese Utility Model Publication No. 58-4398, for example, partially cut away. A lower plate integrated with the center pole 2, a ring-shaped magnet 4, an upper plate 5, and the members from the center pole 2 to the upper plate 5 constitute the magnetic circuit 1.

Further, reference numeral 6 denotes a frame attached to the upper plate 5, reference numeral 7 denotes a gasket for fixing an edge to a peripheral portion of the frame 6, reference numeral 8 denotes a cone-shaped diaphragm, and reference numeral 9 denotes a silicone rubber-based adhesive braking agent. The edge is connected to the outer periphery of the diaphragm 8. Reference numeral 10 denotes a cylindrical voice coil connected to the inner peripheral edge of the diaphragm 8, and reference numeral 11 denotes a voice coil 1.
A damper continuously provided between the frame 0 and the frame 6, a magnetic gap 12 into which the voice coil 12 is inserted, and a dust cap 13 are provided.

Next, the operation will be described. First, as an example of the silicone rubber-based pressure-sensitive adhesive, a chain holganopolysiloxane as a base compound is 85 to 85%.
90%, 3-7% ketooxime silane as crosslinker
5% as standard, and silica filler 5 to 5
A material having a ratio of 10% is used, and has an elongation of 300 to 400% and maintains physical properties for 10 years within a temperature range of 180 to 55 ° C.

[0005] The edge 9 coated with the silicone rubber-based adhesive is excellent in weather resistance, cold resistance, heat resistance, and water resistance, and has almost the same quality even when exposed to sunlight, ozone, snow, seawater, and heat for a long time. Also, the elasticity is semi-permanent even if the characteristic does not change and the distortion is repeated due to the amplitude of the edge 9.

In such a speaker, a voice coil in a magnetic circuit vibrates (reciprocates) in response to a voice current.
By doing so, a sound corresponding to the vibration is generated on the diaphragm 8.

[0007]

Since the conventional speaker is configured as described above, the silicone rubber-based adhesive applied to the edge 9 maintains the desired physical characteristics even in an atmosphere at 150 ° C. Since the base material of the edge 9 is formed of a cloth molded product, and is generally formed by impregnating cotton with phenol, the desired physical properties are maintained for a long time in an atmosphere at 150 ° C. However, there is a problem that the heat resistance is poor as a whole of the edge 9.

The invention of claim 1 has been made to solve the above-mentioned problems, and a speaker capable of performing stable operation for a long period of time even in a high-temperature atmosphere of 150 ° C. and maintaining desired physical characteristics. The purpose is to obtain.

Another object of the present invention is to provide a speaker capable of forming an edge having a high strength against a tearing force or the like.

[0010]

According to a first aspect of the present invention, there is provided a loudspeaker having a ring-shaped edge formed as a molded product of a millable silicon rubber, and an inner peripheral portion of the edge formed of anodized aluminum or titanium. The formed diaphragm is
They are integrally bonded at the time of molding the edge.

A speaker according to a second aspect of the present invention has a heat-resistant fiber embedded in a ring-shaped edge formed as a molded product of a millable silicone rubber.

[0012]

In the speaker according to the first aspect of the present invention, the edge itself is made of a molded product of the millable silicon rubber, so that the speaker can have excellent heat resistance and can maintain the desired physical characteristics for a long period of time. In addition, since the molding of the edge and the lamination with the diaphragm are performed at the same time as the molding of the edge, the adhesive required for lamination is not required, the weight of the diaphragm and the edge is reduced, and the input / output of audio signals is performed. Improve characteristics and frequency characteristics.

In the speaker according to the second aspect of the present invention, by embedding heat-resistant fibers as a base material in the edge, an external force such as a tearing force can be reduced as compared with a case where only a millable silicon rubber molded product is used. Increase the mechanical strength of the edge.

[0014]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 14 is an anodized aluminum or titanium diaphragm, 15 is a millable silicon rubber edge, 16 is a primer applied to the surface of the diaphragm 14 bonded to the millable silicon rubber edge 15, 6 is a frame, 7 is a gasket.
Although other peripheral structures are not shown, they are basically the same as those shown in FIG.

Next, the operation will be described. First, the millable silicon rubber edge 15 is attached to the diaphragm 14 made of anodized aluminum or titanium simultaneously with the edge molding. A primer 16 is applied to the bonded portion of the diaphragm 14 in order to strengthen the bonding of the millable silicon rubber edge 15.
In this bonding, the adhesive itself is used because the viscosity itself of the millable silicone rubber is used as the bonding force.

Further, the diaphragm 14 made of anodized aluminum or titanium and the millable silicon rubber have excellent heat resistance, and even in an atmosphere at 150 ° C. for a long period of time, the desired physical characteristics, for example, harmonics corresponding to the speaker aperture, are obtained. Wave distortion, frequency modulation distortion, directional characteristics, output voltage frequency characteristics, output voltage level, etc. can be maintained.

[0017] Further, for bonding of normal silicone rubber,
Although an adhesive such as RTV rubber is required, the bonding method according to the present invention does not require an adhesive, so that the weight of the vibration system can be reduced. Even at a high temperature of 150 ° C., stable physical properties can be maintained.

Embodiment 2 FIG. In the above embodiment, the edge 1
5 shows a case where a single piece of the millable silicone rubber was used. As shown in FIG. 2, a fiber having good heat resistance such as a glass cloth 17 was embedded in the millable silicone rubber as a base material, and molding was performed. An edge 15A having a three-layer structure may be used. In this case, it is possible to obtain the edge 15 that is mechanically stronger against external force such as a tearing force while obtaining the desired physical characteristics than the case of the millable silicon rubber alone. it can.

[0019]

As described above, according to the first aspect of the present invention, a ring-shaped edge is formed as a molded product of the millable silicon rubber, and an inner peripheral portion of the edge is formed of anodized aluminum or titanium. Since the formed diaphragm is integrally bonded at the time of molding the edge, the diaphragm and the edge can maintain stable physical properties even in an atmosphere as high as 150 ° C., and have a high efficiency over a long period of time. There is an effect that a practical speaker can be obtained.

According to the second aspect of the present invention, the heat-resistant fiber is embedded in the ring-shaped edge formed as a molded product of the millable silicone rubber. As compared with the above, there is obtained an effect that a mechanical strength against a tearing force or the like can be sufficiently increased while obtaining desired physical properties.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a speaker according to an embodiment of the present invention in a partially cutaway manner.

FIG. 2 is a sectional view showing an edge of the speaker according to the second aspect of the present invention.

FIG. 3 is a cross-sectional view showing a conventional speaker partially cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic circuit 6 Frame 10 Voice coil 14 Diaphragm 15 Edge 17 Heat resistant fiber

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-10996 (JP, A) JP-A-62-263798 (JP, A) JP-A-47-41618 (JP, A) JP-A-53-1983 124414 (JP, A) JP-A-54-157619 (JP, A) JP-A-62-224197 (JP, A) JP-A-63-211900 (JP, A) JP-A-5-60085 (JP, U) Japanese Utility Model Hei 2-44497 (JP, U) Japanese Utility Model Showa 64-33292 (JP, U)

Claims (2)

(57) [Claims] 1. A ring-shaped edge formed as a molded product of a millable silicon rubber and an anodic oxide film formed of aluminum or titanium.
A diaphragm bonded to the inner peripheral portion of the edge, a frame for fixing the outer peripheral portion of the edge, a cylindrical voice coil for holding the inner peripheral portion of the diaphragm, and holding the frame, A speaker including a magnetic circuit for driving a voice coil. 2. A ring-shaped edge formed as a molded product of a millable silicon rubber and an anodic oxide film formed of aluminum or titanium.
A diaphragm bonded to the inner peripheral portion of the edge, a frame for fixing the outer peripheral portion of the edge, a cylindrical voice coil for holding the inner peripheral portion of the diaphragm, and holding the frame, A speaker comprising: a magnetic circuit for driving a voice coil; and heat-resistant fibers embedded in the edge as a base material.