JPS59139787A - Composite speaker - Google Patents

Abstract

PURPOSE:To decrease the number of component parts and to attain miniaturization for a composite speaker by providing the 2nd speaker on the back frame of the diaphragm or on a magnetic circuit of a main speaker. CONSTITUTION:A magnetic circuit 18 contains a plate 20 having a center pole 19, a ring-shaped magnet 21 and a ring-shaped upper plate 22. A frame 23 is connected to the circuit 18, and the fringe part of a diaphragm 25 is connected to the fringe part of the frame 23. A voice coil 26 is connected to the center of the dipharagm 25, and the middle part of the coil 26 is held by a damper 27. The lower part of the coil 26 is fitted into a magnetic cap 28 of the circuit 18 with no eccentricity. Then the 2nd speaker 31 is set onto the back frame 23 of the diaphragm 25 of a main speaker 30. The sounds of the speaker 31 are delivered through the diaphragm 25. In such a way, the number of component parts is decreased to attain miniaturization of a composite speaker.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite speaker that has a simple structure, is easy to assemble, can be made compact, and is inexpensive.

FIG. 1 shows a conventional composite speaker.

It was constructed as shown in Figure 2.

First, in the device shown in FIG. 1, a frame 6 is connected to a magnetic circuit 6 constituted by a plate 2 having a center pole 1, a ring-shaped magnet 3, and a ring-shaped upper plate 4, and the peripheral edge of the frame 6 is The periphery of the edge 9 of the diaphragm 8 is fixed together with the gasket 7 to the diaphragm 8, the voice coil 10 is coupled to the center of the diaphragm 8, and the middle part of the voice coil 1o is held by a damper 11. The lower part of the main speaker 14 is fitted into the magnetic gear saw 12 of the magnetic circuit 6 without eccentricity, and the dust cap 13 is attached to the upper center surface of the diaphragm 8, and the main speaker 14 is fixed to the peripheral edge of the frame 6. A small second speaker 16 was attached to the center of a support plate 16 having a sound emitting hole.

In addition, in the conventional example shown in FIG. 2, the main speaker 14 has the same structure as that in FIG. It is constructed by attaching a speaker 16.

In this way, in the conventional composite speaker, the main speaker 1
The configuration is such that a small second speaker 16 is placed in front of the diaphragm 8 of No. 4.
It is necessary to use support plates 16 and struts 17 to support the structure, which increases the number of parts, requires time and effort to assemble, and is disadvantageous in terms of cost. Disadvantages include significant restrictions when downsizing the entire structure. was there.

The present invention eliminates the drawbacks of the prior art as described above.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 9 of the drawings.

To explain the embodiment shown in FIG. 3, reference numeral 18 denotes a magnetic circuit, and this magnetic circuit 18 is formed into an outer magnetic type by a plate 2o having a center pole 19, a ring-shaped magnet 21, and a ring-shaped upper plate 22. It is configured.

A frame 23 is coupled to the magnetic circuit 18, a gasket 24 and a diaphragm 26 are coupled to the periphery of the frame 23, a voice coil 26 is coupled to the center of the diaphragm 26, and a voice coil 26 is coupled to the center of the diaphragm 26. The middle part of the voice coil 26 is held by a damper 27, and the lower part of the voice coil 26 fits into the magnetic gap 28 of the magnetic circuit 18 without eccentricity.

It's ugly, the top of the center part of the diaphragm 25, the voice coil 2 is still there.
A dust cap 29 is attached to the upper end of 6.

The above configuration constitutes a main speaker 3o, and a small second speaker 31 is incorporated on the frame 23 on the back side of the diaphragm 25 of the main speaker 30.

The sound from this second speaker 31 is configured to be radiated through the diaphragm 25.

To explain the embodiment shown in FIG. 4, 32 is a magnetic circuit, and this magnetic circuit 32 is constructed in an internal magnetic type by incorporating a laminate of a columnar magnet 34 and a pole piece 36 in the center of a yoke 33. ing.

Several frames 36 are arranged in this magnetic circuit 32, and on the periphery of this frame 36 is fixed the periphery of a diaphragm 3 whose cross-sectional shape has a continuous shape of three 1-mm. A voice coil 39 that fits into the magnetic gap 38 of the magnetic circuit 32 is coupled to the lower surface of the diaphragm 37 to constitute the main speaker 4o. On the upper surface of the pole piece 35 of this main speaker 4o, there is a monomorph type piezoelectric type formed by bonding electrode plates 42.4'3 to both sides of a piezoelectric ceramic plate 41 as shown in FIGS. 5 and 6. The speaker 44 is
Built-in as a second speaker.

Note that the piezoelectric speaker 44 may be of a bimorph type.

The one shown in FIG. 7 uses the main speaker 40 of the embodiment shown in FIG. 4, and the ring-shaped piezoelectric speaker 46 shown in FIGS. This is an embodiment in which several rings are formed on the upper surface of the frame 36 on the back side of the frame 36.The piezoelectric speaker 45 shown in FIGS. 8 and 9 has a ring-shaped piezoelectric ceramic plate 47.
8 is attached, and the electrode 4 is attached to the outer surface of this piezoelectric ceramic plate 47.48.
A bimorph type with 960 is shown.

As described above, the composite speaker of the present invention is not configured, but since the second speaker can be incorporated into the frame of the main speaker or a part of the magnetic circuit, there is no need to provide a support plate or support like in the past. This reduces the number of parts, reduces the assembly process, and improves mass production, which is advantageous in terms of cost. It is a dog with no practical value.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing conventional composite speakers;
FIG. 3 is a sectional view showing one embodiment of the composite speaker of the present invention, FIG. 4 is a sectional view showing another embodiment of the composite speaker, and FIG. 5 is a sectional view of a piezoelectric speaker to be incorporated into the composite speaker. 6 is a front view of the piezoelectric speaker, FIG. 7 is a sectional view of another composite speaker, FIG. 8 is a front view of the piezoelectric speaker used in the composite speaker, and FIG. 9 is a front view of the piezoelectric speaker. is a perspective view of the same piezoelectric speaker. 18...m air circuit, 23...frame, 25...diaphragm, 26...voice coil, 2B...magnetic gap, 30... ...Main speaker, 31...Second speaker, 32...
...Magnetic circuit, 36...Frame, 37...
...Diaphragm, 38...Magnetic gap, 39.
...Voice coil, 4o...Main speaker, 44°46...Piezoelectric speaker. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 5; Figure 6 Δ11 Figure 7 Figure 9 ΔQ

Claims (2)

[Claims] (1) The peripheral part of a diaphragm is attached to a frame connected to a magnetic circuit, and a voice coil that fits into the magnetic gap of the magnetic circuit is connected to this diaphragm.
1. A composite speaker, which is constructed by incorporating a speaker, and the second speaker is arranged on a frame or a magnetic circuit on the back side of a diaphragm of the main speaker.゛ (2) A composite speaker according to claim 1, which uses a piezoelectric speaker as a second sous viker.