JPS5844709Y2 - speaker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker suitable for application to a small speaker.

The configuration of an example of a conventional cone-shaped speaker is shown in FIG.

In FIG. 1, reference numeral 1 denotes a cone. The cone 1 is supported by a frame 4 by a damper 2 and an edge 3, and a voice coil 5 is wound around the neck 1a of the cone 1 via a winding frame.

A magnetic circuit is constituted by the magnet 6, yoke 7, and pole 8, and the voice coil 5 is positioned within the magnetic gap between the yoke 7 and the pole 8 of this magnetic circuit.

The cone 1 is provided with a center cap 9.

The center cap 9 is provided for the purpose of preventing iron powder and dust from entering the magnetic gap and widening the radiation area at high frequencies.

In such a conventional speaker, since the center cap 9 is directly fixed to the cone 1, the vibration of the center cap 9 is distorted, which adversely affects the frequency characteristics of the speaker.

In particular, when a synthetic resin film coated with a metal film is used as the center cap 9, such drawbacks are noticeable.

In addition, when the cone 1 operates as a piston, mainly in low frequency operation, the air circulation within the yoke 7 is reduced by the center cap 9.
This had the disadvantage of making it difficult to produce bass sounds.

The present invention provides the center cap 9 of such a conventional speaker.
This eliminates the above-mentioned drawbacks caused by this.

Hereinafter, one embodiment of the present invention will be described with reference to FIG.

In FIG. 2, reference numeral 10 indicates a tough user made of, for example, a synthetic resin film coated with a metal film and formed into a bowl shape.

This differential user 10 has a neck 1 from the middle part of the cone 1.
It is attached to the cone 1 via the support 11 at the position on the a side.

In this example, the support 11 is made of cloth impregnated with synthetic resin and formed into a corrugated cross section.

In other words, the support body 11 is made of the same material as the damper 2.

The support 11 may be any acoustically transparent material that allows air to flow from the back to the front or vice versa, and coarse cloth may also be used.

The differential user 10 is for scattering (reflecting) high-pitched sounds emitted mainly from the side of the cone 1 near the neck 1a and bending the radiation path thereof.

This high-frequency user 10 makes the treble sound almost omnidirectional, and the listening area can be expanded.

Therefore, the hard user 10 needs to have enough hardness to scatter sound.

The shape is not limited to the bowl shape, but can also be a hollow sphere as shown in Figure 3A, or a cylindrical scattering plate surrounding it that spreads toward the front as shown in Figure 3B. Various modifications are possible.

The mounting position and shape of the differential user 10 are selected so that the frequency characteristics, directivity, and other characteristics of the speaker are optimal.

As understood from the above description of one embodiment of the present invention,
When the cone 1 moves as a piston, air flows through the support 11, and unlike conventional speakers, the center cap 9 does not obstruct this air flow, making it possible to emit even lower frequencies.

However, the support 11 prevents iron powder, dust, etc. from entering the magnetic gap.

Furthermore, the differential user 10 eliminates the directivity of mainly high-pitched sounds, making it possible to widen the listening area.

Furthermore, since the tough user 10 is not directly fixed to the cone 1 and the support 11 is present between the two,
Due to the damper action of this support 11, the differential user 10
The vibration of the cone 1 can be prevented from having an adverse effect on the vibration of the cone 1.

Therefore, the range of selection of the shape or material of the differential user 10 is expanded, and the design of the speaker becomes easier.
Costs can be further reduced.

Note that the shape of the cone 1 may be a curved cone or a pleated cone other than the flat cone as in the embodiment.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an example of a conventional speaker, FIG. 2 is a sectional view of an embodiment of the present invention, and FIG. 3 is a route diagram showing a modified example of the shape of a differential user. 1 is a cone, 10 is a stiffener, and 11 is a support.

Claims (1)

[Scope of utility model registration request] A loudspeaker in which a tough user is attached to the cone through an acoustically transparent support at a position closer to the neck than the middle part of the cone.