JPS6031356Y2 - speaker - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a speaker that enables low frequency reproduction by incorporating a weight ring into the voice coil, and is particularly aimed at ensuring the connection of the weight ring. .

A conventional speaker of this type was constructed as shown in FIG.

That is, a frame 6 is connected to a magnetic circuit 5 composed of a plate 2 having a center pole 1, a ring-shaped magnet 3, and a ring-shaped upper plate 4, and a diaphragm 8 is attached to the peripheral edge of the frame 6 together with a gasket 7.
A voice coil 9 is connected to the center of the diaphragm 8, the middle part of the voice coil 9 is held by a damper 10, and the lower coil part of the voice coil 9 is connected to the magnetic circuit 5. It was fitted into the magnetic gap 11 without eccentricity, a weight ring 12 made of rubber or the like was coupled to the upper part of the voice coil 9, and a dust cap 13 was attached to the center of the upper surface of the diaphragm 8.

The weight ring 12 has a structure in which a collar 12b is provided on the upper outer periphery of a cylindrical body 12a, and the cylindrical body 12a is formed to be approximately equal to the inner diameter of the voice coil 9. The cylindrical body 12a of the weight ring 12 was fitted and connected to the voice coil 9 by applying adhesive to the outer periphery or inside the voice coil 9, but due to its dimensional accuracy, sufficient adhesive connection could not be achieved. When the adhesive is applied in winter, the adhesive flows out and enters the magnetic gap 11, causing a problem in the operation of the speaker.

The present invention eliminates the above-mentioned drawbacks of the prior art.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 5.

14 is a magnetic circuit, and this magnetic circuit 14 includes a frame 16 having a center pole 15, and a ring-shaped magnet 17.
, is also constituted by a ring-shaped upper plate 18.

A frame 19 is connected to the magnetic circuit 15, and a gasket 20 and a peripheral edge of a diaphragm 21 are connected to the peripheral edge of the frame 19 by adhesive or the like.

A voice coil 22 is coupled to the center of this diaphragm 21, the middle part of this voice coil 22 is held by a damper 23, and the lower coil part 22a is connected to the magnetic circuit 14.
It fits into the magnetic gap 24 of.

A weight ring 25 is tied to the upper part of the coil bobbin 2b of this voice coil 22.

This weight ring 25 has a hardness of 20° [Rubber hardness tester C
Shape (Measurement value according to JIS-6601)] A connecting collar 25b is provided on the outside of the upper part of the cylindrical body 25a with the following rubber such as neoprene or butyl, and a cut portion 25 in the height direction is provided on the entire cylindrical body 25a.
c.

Therefore, by applying a low-hardness adhesive that does not contain a solvent (for example, a polyester-based or silicone-based adhesive),
The cylindrical body 25a of the weight ring 5 is attached to the coil bobbin 22b.
The coil bobbin 22b and the cylindrical body 25a are inserted into the weight ring 25, and the coil bobbin 22b and the cylindrical body 25a are joined together by applying pressure to the joint surfaces thereof so as to be pushed apart from the inside of the weight ring 25.

With this, even if a thin layer of adhesive is applied uniformly, the bond can be firmly and reliably bonded.

A dust cap 2 is placed on the upper surface of the central part of the diaphragm 21.
6 is attached.

Since the speaker of the present invention is constructed as described above, the weight ring and voice coil can be strongly and reliably bonded, resulting in a significant improvement in quality. Since it can be used, it has the advantage that the degree of flexibility does not change significantly and the frequency characteristics can be stabilized, so it is of great practical value.

[Brief explanation of the drawing]

Fig. 1 is a half sectional view showing a conventional speaker, Fig. 2 is a half sectional view showing an embodiment of the speaker of the present invention, Fig. 3 is a half spherical view with the dust cap removed, and Fig. 4 is a half sectional view showing a conventional speaker. A top view of the weight ring, and FIG. 5 is a half-sectional front view thereof. 14...Magnetic circuit, 19...Frame, 21...Diaphragm, 22...Voice coil, 22b...Coil bobbin, 24... ...
...magnetic gap, 25... weight ring,
25a...Cylindrical body, 25b...Connection collar, 25c...Cut portion.

Claims (1)

[Scope of utility model registration request] A diaphragm is built into the frame connected to the magnetic circuit, a voice coil that fits into the magnetic gap of the magnetic circuit is connected to this diaphragm, and the coil bobbin of this voice coil has a hardness of 2.
In a speaker formed by combining a weight ring made of rubber with an angle of 0° or less and having a connecting collar on the upper outer periphery of a cylindrical body,
A speaker in which a cut portion is provided in a part of the weight ring over the entire height direction, and the weight ring is bonded to a coil bobbin of a voice coil with a low-hardness adhesive.