JPS6035355Y2 - speaker - Google Patents

Description

[Detailed description of the invention] The present invention relates to a speaker that uses a metal dust cap to improve high-frequency characteristics.In particular, it prevents the dust cap from being deformed by external force and provides excellent high-frequency characteristics. This is what we are trying to provide.

In general, speakers were constructed as shown in FIG.

That is, a plate 2 having a center pole 1, a ring-shaped magnet 3, and a ring-shaped upper plate 4.
A frame 6 is coupled to a magnetic circuit 5 configured by
The peripheral edge of the diaphragm 8 is adhesively bonded together with the gasket 7 to the peripheral edge of the frame 6, the voice coil 9 is connected to the center of the diaphragm 8, and the intermediate portion of the voice coil 9 is held by a damper 10. The lower part of the voice coil 9 is fitted into the magnetic gap 11 of the magnetic circuit 5 without eccentricity, and a dust cap 12 is placed on the center upper surface of the diaphragm 8.
It is constructed by pasting the .

In such a speaker, the higher the pitch of the sound being reproduced, the more the sound is generated only from the center of the diaphragm 8 near the joint with the voice coil 9.
By attaching the dust cap 12 to the center of the diaphragm 8, the high frequency range is cut off and cannot be reproduced.

This is not a problem with speakers for low-pitched sounds, and on the contrary, it is desired, but it is a big problem with full-range speakers that reproduce the entire range from bass to treble.

If the dust cap 12 is glued to the upper end of the coil bobbin of the voice coil 9, or if the dust cap 12 is made of a breathable material made of fabric, it is possible to reproduce high frequencies. A device that is connected to the top end causes a design balance problem and cannot be used in many cases, and if a breathable dust cap 12 is used, the third harmonic distortion in the low frequency range will greatly increase. This has the disadvantage of being disadvantageous in terms of Hi-Fi playback.

For this reason, a configuration has been developed for full-range speakers that uses metal foil such as aluminum having a high Young's modulus as the dust cap 12 to extend the high frequency range as much as possible.

However, even in this configuration, the dust cap 12
The disadvantages are that the high frequency range is considerably cut off compared to the one without, and it is easily deformed by external force, resulting in a significant deterioration in appearance quality.

The present invention eliminates the above-mentioned drawbacks of the conventional technology, and attempts to provide a speaker that uses a reinforcing body to significantly reduce the cut portion of the high frequency range and prevent deformation of the dust cap due to external force. It is something.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

Note that the overall structure of the speaker is the same as that shown in FIG. 1, and the features of the present invention will be mainly explained here.

In FIGS. 2 and 3, reference numeral 13 denotes a reinforcing body made of light metal or synthetic resin that is light and has a high Young's modulus. 14, and four crosspieces 15 that slope upward toward the center from this ring-shaped portion 14 are provided, and a metal dust cap 12 having a curved upper surface is provided at the center of the gathering portion of the crosspieces 15. The connecting portion 16 is provided.

The diameter of this joint 16 is suitably about 1/3 to 172 of the diameter of the dust cap 12.

Furthermore, adhesive may be used to bond the joint portion 16 and the dust cap 12, but it is easier to control disturbances in the characteristics at high frequencies if adhesive resin is used.

With this configuration, the vibration of the voice coil 9 is directly transmitted to the coil bobbin 9 a , the reinforcing body 13 , and the dust cap 12 , so that when the vibration is transmitted to the dust cap 12 via the diaphragm 8 which has a large internal loss, There is much less attenuation compared to this, and the high frequencies are no longer cut.

In addition, since it is possible to create resonance at an appropriate frequency depending on the shape, material, thickness, etc. of this reinforcing body 13, it is possible to create a peak in the high frequency range, which can produce a sound that is pleasing to the ears. Another advantage is that you can freely control the sound quality.

Furthermore, a hard reinforcing body 13 is provided on the bottom surface of the dust cap 12.
Since the connecting portion 16 is attached, deformation when pressed with a finger can be significantly reduced, and the appearance quality can also be improved.

As described above, by using a simple reinforcing body, the speaker of the present invention does not cut high frequencies even when using a metal dust cap, and also prevents the dust cap from deforming due to external force. It has outstanding properties and quality, and is of great practical value.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view of a general speaker, FIG. 2 is a sectional view of essential parts of an embodiment of the speaker of the present invention, and FIG. 3 is a top view of a reinforcing body used in the speaker. 5... Magnetic circuit, 6... Frame, 8
...Diaphragm, 9...Voice coil, 1
0... Damper, 11... Magnetic gap, 12... Dust cap, 13...
・Reinforcement body, 14...Ring-shaped part, 15...
... Crosspiece, 16... Joint part.

Claims (1)

[Scope of utility model registration request] In a speaker in which a diaphragm is incorporated into a frame coupled to a magnetic circuit, a voice coil coupled to the center of the diaphragm is fitted into a magnetic gap of the magnetic circuit, and a dust cap is attached to the upper surface of the center of the diaphragm. , a ring-shaped part coupled to the upper part of the voice coil, and a spherical coupling part having a diameter of 173 to 1/2 of the diameter of the dust cap, which is coupled to the lower surface of the dust cap, are integrally formed of a hard material. A speaker that uses a reinforced body.