JPH0130359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cone speaker, particularly a speaker cone and a cylindrical body for winding a voice coil, which are connected at the mouth of the speaker cone and integrally formed. The present invention provides a cone speaker constructed using speaker cone paper manufactured by adhering paper made through a paper manufacturing process to the surface of a mold, and the mouth part of the speaker cone and the cylindrical body are connected to each other. By integrally molding these joints, an ideal vibration system with zero compliance can be created, which reduces the high limit frequency in the high range.
By extending the fh and expanding the band, we also prevent the negative effects on sound quality due to fluctuations in frequency characteristics, and
This makes it possible to create a woofer with excellent bass damping characteristics.Furthermore, in the manufacturing process of speaker cone paper, it is possible to ensure the perpendicularity of the cylindrical body using a mold, which eliminates cracks during assembly. The purpose is to reduce defects.

In the conventional cone speaker of this type, as shown in FIG. 1, the speaker cone 1 and voice coil 2 are made separately and are bonded together with an adhesive 3. However, this inevitably results in compliance at the joint, poor damping in the low range, and fluctuations in frequency characteristics, making it difficult to obtain good results.
Furthermore, since there is a gap in the fit between the speaker cone 1 and the cylindrical body 4 of the voice coil 2, verticality cannot be maintained due to manufacturing variations, which also causes defects such as cracks.

The present invention eliminates these conventional drawbacks and will be described below with reference to the embodiments shown in FIGS. 2 and 3.

FIG. 2a is a configuration diagram of a speaker cone section and a voice coil section, which are the main parts of the cone speaker of the present invention. A speaker cone paper is formed on the surface of a mold 5 which is connected at the mouth part 1' and is integrally molded through a paper manufacturing process.

FIG. 2b shows an enlarged view of section A in FIG. 2a.

What is shown in FIG. 3 shows a part of the manufacturing process of the speaker cone 1 for integrally molding the above-mentioned cylindrical body 4, and step a in the figure shows the manufacturing process of the speaker cone paper in the manufacturing process of the speaker cone paper. In the cone paper making process, a speaker cone 1 and a cylindrical body 4 for winding a voice coil 2 as shown in the figure are connected at the mouth part 1' of the speaker cone 1 and formed integrally. By using a mold 5 and attaching paper made from paper pulp to the surface of the mold 5, the speaker cone 1 is formed in advance.
A cylindrical body 4 for winding a speaker cone 1 and a voice coil 2 by elongating the mouth part 1' of the cylindrical body 4.
and are molded together (integral papermaking). At this time, as shown in the figure, the part that becomes the cylindrical body 4 is the speaker cone 1.
Make the paper thicker and harder than the part where it will be.

The step shown in FIG. It is hardened and molded using a press to make it even harder.

Thereafter, after sufficiently drying, the top portion 6 is cut into slices, and the voice coil 2 is wound around the thus obtained cylindrical body 4 using ordinary winding means.

As explained above, this invention has the following features:
A speaker cone and a cylindrical body for winding a voice coil are connected to each other at the mouth of the speaker cone and are formed integrally on the surface of a mold through a paper manufacturing process. A cone speaker constructed using a speaker cone paper manufactured by adhering a made paper, in which the mouth part of the speaker cone is made long in advance, and the speaker cone and the voice coil are wound. A cylindrical body is formed integrally with the cylindrical body, and the part that becomes the cylindrical body is made thicker than the part that becomes the speaker cone, and then the raised part of the mouth of the speaker cone is By providing a cone speaker that is characterized by impregnating it with an impregnating agent and hardening and molding it with a heat press, we have achieved the ideal of zero compliance at the joint between the speaker cone and the cylindrical body (voice coil). Because a vibration system is created, the high-frequency limit frequency fh in the high range is also extended, making it possible to expand the band.Also, it prevents the negative effects on sound quality due to fluctuations in frequency characteristics, and has excellent bass damping characteristics. In addition, since the verticality of the cylindrical body is ensured by the mold in the speaker cone paper manufacturing process, it is possible to reduce the causes of defects such as cracks during assembly. During the papermaking process, a mold is used to attach the paper to the surface of the mold,
Since the speaker cone and the cylindrical body are integrally molded (integral papermaking), the thickness of the paper for the cylindrical body part is adjusted by changing the paper density for the part that will become the cylindrical body. It can be made thicker and harder than the part that becomes the speaker cone, and the thickness is uniform and it is not too heavy.Also, the raised part of the mouth of the speaker cone is impregnated with an impregnating agent.
By hardening and molding with a heat press, it can be easily made harder without changing the weight, and in addition, paper is made using a common and abundant material called paper (paper pulp). Therefore, it is very inexpensive, has good productivity, and has great industrial value.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing the vibration system of a conventional cone speaker, and Figs. 2a and 2b are side sectional views showing the configuration of the vibration system of an embodiment of the cone speaker according to the present invention, and a partially enlarged view thereof. 3A is an explanatory diagram of the paper making process, and FIG. 3B is an explanatory diagram of the hot pressing process. 1... Speaker cone, 1'... Mouth part, 2...
...Voice coil, 4...Cylindrical body, 5...Mold, 6
...Apex section.

Claims (1)

[Scope of Claims] 1. Paper making is carried out on the surface of a mold having a shape in which a speaker cone and a cylindrical body for winding a voice coil are connected at the mouth of the speaker cone and are integrally molded. A cone speaker constructed using a speaker cone paper manufactured by adhering paper made through a manufacturing process, wherein the mouth part of the speaker cone is lengthened in advance, and the mouth part of the speaker cone is made long, and the speaker cone and the A cylindrical body for winding a voice coil is integrally molded, and the part that will become the cylindrical body is made thicker than the part that will become the speaker cone. A cone speaker characterized by impregnating the upright part of the mouth part with an impregnating agent and hardening and molding it with a hot press.