JPS6035341Y2 - speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker having two vibrating bodies, one in the shape of a ribbon and the other in the shape of a dome, driven by a single magnetic circuit.

2. Description of the Related Art Composite speakers that include both a horn-shaped and a cone-shaped vibrating body are conventionally known for the purpose of using one speaker as a two-way speaker.

However, these composite speakers that use a common magnetic circuit for the horn-shaped vibrator and the cone-shaped vibrator require a high magnetic flux density, so the magnetic circuit and magnet are large. There was a drawback that it became a shape.

Additionally, because of the high magnetic flux density required, some ended up having separate magnetic circuits.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional speakers. In a dome-shaped or horn-shaped speaker having an external magnetic circuit, a doll-shaped vibrator is inserted into the magnetic gap between the top plate and the pole. Alternatively, a speaker is provided in which a voice coil fixed to a diaphragm is arranged and a ribbon-shaped vibrating body is arranged in a magnetic gap between a top plate and a back plate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1a is a cross-sectional view illustrating an embodiment of a dome-shaped speaker according to the present invention, in which 1 is a top plate, 2
3 is a back plate, 3 is a pole provided integrally with or separately from the back plate 2, and 4 is a magnet held between the back plate 2 and the top plate 1.

A dome-shaped vibrator 6 is arranged in the magnetic gap 5 between the top plate 1 and the pole 3 via a voice coil 9, and a ribbon-shaped vibrator is arranged in the magnetic gap 7 between the top plate 1 and the back plate 2. A body 8 is arranged.

The flange 11 is a reflecting plate that radiates sound in the same direction as the sound radiating direction of the dome-shaped vibrating body 6.

The ribbon-shaped vibrating body 8 has a substantially cylindrical shape and surrounds the magnet 4 along its circumference.

FIG. 1 is a top view illustrating the speaker of FIG. 1a having the above configuration, and the same parts as in FIG. 1a are designated by the same reference numerals.

FIG. 2a is a cross-sectional view illustrating another embodiment of the dome-shaped speaker according to the present invention, in which 101 is a top plate, 102 is a back plate, and 103 is provided integrally with or separately from the back plate 102. Paul, 10
4 is the back plate 102 and top plate 101
It is a magnet held between the

The top plate 101 has a rectangular shape when viewed from above, unlike the embodiment shown in FIG.
The back plate 102 is also formed into a substantially rectangular shape, and further includes a rising portion 102'.

A dome-shaped vibrating body 106 is placed in the magnetic gap 105 between the top plate 101 and the pole 103 via a voice coil 109, and the magnetic field between the rising portions of the rising portions 102' of the top plate 101 and the back plate 102 is A ribbon-shaped vibrating body 10 is provided in the gap 107.
8 is placed.

110 is a flange.

The ribbon-shaped vibrating body 108 is configured in a band shape.

FIG. 2 is a top view illustrating the speaker of FIG. 2a having the above configuration, and the same parts as in FIG. 2a are designated by the same reference numerals.

The equivalent circuits of the two embodiments having the above configuration are shown in FIG. 3a, and the frequency characteristics are shown in the graph of FIG.

In FIG. 3a, C1 and C2 are capacitors, 31 is a dome-shaped vibrating body, and 32 is a ribbon-shaped vibrating body.

In Figure 3, the vertical axis is the sound pressure level, the horizontal axis is the frequency,
G1 represents the frequency characteristic of the dome-shaped vibrating body, and G2 represents the frequency characteristic of the ribbon-shaped vibrating body.

In this way, in the above embodiment, the dome-shaped vibrating body and the ribbon-shaped vibrating body emit sounds in different bands, and by combining them, it is possible to obtain reproduced sound over a wide band.

In addition, FIG. 4a is an equivalent circuit of the above two embodiments in which the high-frequency resonance of the dome-shaped vibrator is suppressed, C3 and C4 are capacitors, 41 is a dome-shaped vibrator,
42 is a ribbon-shaped vibrating body.

Figure 4 is a graph explaining the frequency characteristics in the case of Figure 4a above, where G3 is the frequency characteristic of the dome-shaped vibrating body designed to suppress high-frequency resonance, and G4 is the frequency characteristic of the ribbon-shaped vibrating body. .

FIG. 5 is a cross-sectional view illustrating an embodiment of a horn-shaped speaker according to the present invention, in which 201 is a top plate, 202 is a back plate, and 203 is provided integrally with or separately from the back plate 202. Paul, 2
04 is the above-mentioned back plate 202 and top plate 20
It is a magnet held between 1 and 1.

A diaphragm 206 is arranged in the magnetic gap 205 between the top plate 201 and the pole 203,
A ribbon-shaped vibrating body 208 is arranged in the magnetic gap 207 between the top plate 201 and the back plate 202.

209 is a voice coil formed in the diaphragm 206, 210 is a horn, and 211 is a horn opening.

The ribbon-shaped vibrating body 208 has a cylindrical shape and surrounds the magnet 204 along its circumference.

In the horn-shaped speaker according to the embodiment shown in FIG. 5, both the sound from the horn opening 211 and the sound from the ribbon-shaped vibrator 208 are non-directional in the horizontal direction.

Figure 6 is a graph comparing the characteristics of a normal horn-type speaker with an aperture in one direction and a horn-type speaker with a horizontal omnidirectional aperture like this example, where the vertical axis is the sound pressure level and the horizontal axis is the The axis is frequency.

G5 is the characteristic of the former horn-type speaker, and G6 is the characteristic of the latter horn-type speaker.

These characteristics G5. As can be seen by comparing the G6, horn-shaped speakers with horizontal omnidirectional apertures tend to lack high-frequency energy and have poor high-frequency characteristics.

The horn-shaped speaker according to the embodiment shown in FIG. 5 has a ribbon-shaped vibrating body with high high-frequency reproducing ability, and therefore has improved high-frequency characteristics.

This is explained in the graph of FIG. 7, where C7 is the characteristic of the horizontal omnidirectional horn-type speaker, C8 is the characteristic of the ribbon-type vibrator, and C9 is the horn-type speaker according to the present embodiment shown in FIG. It is a characteristic of

Note that the relationship between the vertical axis and the horizontal axis is the same as the graph in FIG. 6.

Although the horn type speaker shown in FIG. 5 is provided with a horn only on the diaphragm 206 side, it can also be provided on the ribbon type vibrating body 208 side.

Since the speaker according to the present invention actively utilizes the leakage magnetic flux to drive the lightweight ribbon-shaped vibrating body as described above, the capability of the magnet in the magnetic circuit can be used efficiently.

In addition, the high-frequency characteristics can be improved, and a wide-band speaker can be formed compactly, and a speaker that has the sound quality of both a dome-shaped, horn-shaped, and ribbon-shaped speaker can be obtained.

Particularly in the case of a horn-type speaker, the effect is great, as a horizontal omnidirectional speaker with a wide band can be obtained.

[Brief explanation of drawings]

Figure 1a is a cross-sectional view of a dome-shaped speaker according to the present invention, Figure 1 is a top view thereof, Figure 2a is a cross-sectional view of a dome-shaped speaker according to another embodiment, and Figure 2 is its top view. top view,
3a and 4a are circuit diagrams of equivalent circuits of a dome-shaped speaker according to the present invention, and FIGS.
Figure 5 is a cross-sectional view of the horn-type speaker of the present invention, Figure 6 is a graph of the frequency characteristics of the conventional horn-type speaker, and Figure 7 is a graph of the frequency characteristic of the horn-type speaker of the present invention. It is a graph of frequency characteristics. 1.101,201...Top plate, 2゜102.202...Back plate, 3,10
3.203...Paul, 4,104,204・
...Magnet, 5,105,205,7,10
7゜207...Magnetic gap, 6,106...
...Dome-shaped vibrating body, 206...Diaphragm, 8,108.208...Ribbon-shaped vibrating body,9. 109.209・・・Voice coil, 1
0,110...Flange, 11...Reflector, 210...Horn, 211...
Horn opening, Gl, G2. G3. G4. G5, G6
．． G7. G8. G9...Characteristics.

Claims (1)

[Scope of utility model registration request] A voice coil fixed to a dome-shaped diaphragm or diaphragm is placed in the magnetic gap formed between the top plate and pole of an external magnet type speaker, and a ribbon-shaped diaphragm is placed in the magnetic gap formed between the top plate and back plate. A speaker characterized in that it is arranged so that