JPS626798Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a speaker that can be made thin and compact.

A conventional speaker was constructed as shown in FIG.

That is, a disk-shaped magnet 2 is placed inside the yoke 1.
A magnetic circuit 4 is constructed by incorporating the laminate of the upper plate 3 and the upper plate 3.
A frame 5 is connected to this magnetic circuit 4, and a gasket 6 and an edge 8 of the diaphragm 7 are connected to the peripheral edge of the frame 5 by adhesive or the like.
A voice coil 9 is coupled to the center of the diaphragm 7, and a damper 10 is connected to the middle of the voice coil 9.
The lower part of the voice coil 9 was fitted into the magnetic gap 11 of the magnetic circuit 4 without eccentricity, and a dust cap 12 was attached to the upper center surface of the diaphragm 7.

In order to reduce the thickness with such a configuration, damper 1
Although it is necessary to reduce the height of 0 and increase the half apex angle of the diaphragm 7, such a configuration will result in a decrease in input resistance and a decrease in the high frequency limit frequency.

Furthermore, in order to reduce the outer diameter of the speaker, the effective radius of the diaphragm 7 becomes smaller, resulting in a decrease in the output sound pressure level.

Furthermore, the above speakers are Edge 8 and Damper 10.
It was made up of separate parts, had many parts, required time to assemble, and was disadvantageous in terms of cost.

The present invention eliminates the above-mentioned drawbacks of the conventional loudspeaker, and aims to provide a speaker that can be made thinner and smaller without deteriorating its characteristics, and can also reduce the number of parts.

In order to achieve the above object, the present invention has a voice coil bobbin that fits into the magnetic gear of a magnetic circuit, and has a double-cylindrical shape connected at the upper part. The diaphragm is characterized by a structure in which the diaphragm is combined with a damper formed integrally with an edge that supports the peripheral edge of the diaphragm.

Hereinafter, an embodiment of the present invention will be explained with reference to FIG. 2 of the drawing.

13 is a disc-shaped magnet 15 inside the yoke 14.
This magnetic circuit 13 is constructed by incorporating a stacked body of a top plate 16 and a top plate 16.
The frame 18 is connected to the central upper surface of a flat frame 18 having a flat frame 18. Further, an upwardly extruded part 19 is provided at the middle part of the bottom surface of the frame 18, and on the upper surface of this extruded part 19, a thermosetting resin is applied to a cotton cloth whose outer peripheral part is an edge 20 and whose inner peripheral part is a damper 21. A support body 22 formed by molding a material impregnated with is bonded by adhesive.

A voice coil 24 is incorporated in the magnetic gap 23 of the magnetic circuit 13, and the bobbin of the voice coil 24 has an inner cylinder 24a around which the coil is wound, an outer cylinder 24b that fits into the outer periphery of the magnetic circuit 13,
It is constituted by a connecting portion 24c that connects the upper ends of the inner and outer cylinders 24a and 24b. Such a bobbin can be easily obtained by molding synthetic resin or press molding metal foil, and the coil can be manufactured by inserting a separately wound coil into the inner tube 24a and bonding it with adhesive.

A neck portion 25a projecting downward from the center of a truncated conical diaphragm 25 is coupled to the upper part of the outer cylinder 24b of the voice coil 24, and the inner peripheral end of the damper 21 is connected to the lower end of the outer cylinder 24b. They are connected by adhesive etc.

Further, a peripheral portion of the diaphragm 25 located below the center portion is coupled to and supported by the edge 20.

Further, a dome-shaped dust cap 26 is attached to the connecting portion 24c of the voice coil 24.

Since the speaker of the present invention is constructed as described above, the overall height can be made slightly higher than the height of the magnetic circuit, making it possible to achieve a considerable thickness reduction, and the effective radius of the diaphragm can also be made large, so that the overall height is slightly higher than that of the magnetic circuit. It has great practical value because it is compact, and the edge and damper can be integrated with the same material, making it easy to assemble and reducing costs by reducing the number of parts. be.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of a conventional speaker.
FIG. 2 is a sectional view of essential parts showing an embodiment of the speaker of the present invention. 13... Magnetic circuit, 18... Frame, 19...
...Extrusion part, 20...Edge, 21...Damper,
22... Support body, 23... Magnetic gap, 24...
...Voice coil, 24a...Inner tube, 24b...Outer tube, 24c...Connection part, 25...Diaphragm, 26...
...dust cap.

Claims (1)

[Scope of utility model registration request] It is equipped with a flat frame with a magnetic circuit attached to the inner bottom surface, and serves as a voice coil that fits into the magnetic gap of the magnetic circuit.The inner tube around which the coil is wound and the outer tube that fits into the outer periphery of the magnetic circuit are connected at the top surface. A bobbin is used, the center part of a truncated conical diaphragm is connected to the upper part of the outer cylinder of this bobbin, and the middle part of a support body whose outer peripheral part is an edge and whose inner peripheral part is a damper is attached to the protruding part of the frame. , the inner peripheral end of the damper is joined to the lower part of the outer cylinder of the bobbin, and the outer peripheral part of the edge is joined to the peripheral part of the diaphragm.