JPS59216394A - Speaker system - Google Patents

Abstract

PURPOSE:To endure a high input by circulating a cooling liquid with an oscillatory partitioning plate, a suction valve, and an exhaust valve, which are provided in the rear side of an electric speaker, to cool a voice coil in a speaker system using a CD or the like. CONSTITUTION:When the diaphragm of a woofer 13 is oscillated to raise the pressure in a cabinet 12, an oscillatory partitioning plate 25 is moved to the inside of a tweeter 14, and the pressure in a tank 24 rises to open a suction valve 23, and an exhaust valve 21 is closed. When the pressure is reduced reversely, the partitioning plate 25 is moved to the outside, and the pressure in the tank 24 is reduced to open the exhaust valve 21, and the suction valve 23 is closed. An internal cooling liquid 32 receives the pressure and is flowed to a bobbin 31 from a small hole 18 opened in a magnetic gap and is brought into contact with the bobbin 31 to cool a voice coil 30. The cooling liquid 32 whih absorbs heat is flowed back into the tank 24 from the second hole 20 of a lower plate 17 and is radiated through a radiation fan 26.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a speaker system.

Conventional configurations and their problems Recently, the digitalization of the source side of CDs, etc., has progressed, and efforts have been made to expand the dynamic range.
Electrodynamic speakers, particularly in the tweeter region, are required to have high input resistance, and the ability of a speaker system to have high input resistance depends on the performance of the electrodynamic speaker used therein. The conventional electrodynamic speaker 7J will be explained below. FIG. 1 is a sectional view of a tweeter of a conventional electrodynamic speaker, in which a bobbin 5 is placed in a magnetic gap 4 consisting of a lower plate 1 to 1 and an upper plate 3 that sandwich annular magnets 1 to 2. An IQ voice coil 7 is fixed to the diaphragm 6 via a diaphragm 6. A frame 9 clamps the outer peripheral edge of the diaphragm 6 via an edge 10, a gas foot 11, etc. 8 is a magnetic fluid injected into the magnetic gap 4. When the input is applied to the voice coil 7, the power level of the voice coil 7 becomes Lte? However, the upper and lower plays 1 through the magnetic fluid 8
By transmitting heat to the coils 1 and 3, the temperature of the voice coil 7 is suppressed and the durability is improved. However, in this J:Una conventional configuration, when input is continuously applied, a thermal upper field occurs between the upper and lower plates 1.3, making it impossible to efficiently dissipate heat, and there are also problems such as evaporation R of the magnetic f1 fluid E3. was there,.

OBJECTS OF THE INVENTION Since the present invention eliminates the above-mentioned conventional drawbacks, it is an object of the present invention to provide a speaker coil that can satisfactorily suppress the temperature R of a voice coil.

Structure of the Invention In order to achieve the above object, the speaker system of the present invention includes a -1 plate and a lower plate which sandwich an annular magnet and form a magnetic gap in the form of a magnetic circuit;
A voice coil located in the annular magnetic gap and fixed to the diaphragm (diaphragm), a coolant tank whose entire surface is formed by a vibrating bulkhead plate, and suction into this coolant tank. a surge tank communicating through a valve; at least one small hole formed in the plate 1 and between the annular magnetic gap; )--a first hole that communicates between the di-tank and the small hole; a second hole formed in the lower plate that communicates the annular magnetic gap with the coolant tank via a discharge valve; 11 At least 61 tweeters consisting of electrodynamic speakers equipped with heat dissipating fins installed on the outer surface of the liquid tank are housed in a sealed cabinet together with the woofer.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to drawing -C1.

FIG. 2 is a 1ltt schematic cross-sectional view of the speaker system-j'L, and 12 indicates the closed cabinets 1 to 1 of the speakers. 13 is a woofer, and 14 is a tweeter. Figure 3 is a sectional view of the tweeter 14, 15 is an annular magnet 116, 17 is to the upper and lower plays 1, 18 is the small hole of the lower plays 1 to 17, 19.20
are the first and second holes of the lower plate 17, 21 is a discharge valve,
22 is a surge tank, 23 is an intake valve, 24 is a tank, 2
5 is a vibration partition plate, 2G is a heat radiation fin, 27 is a tweeter 1
4 is a diaphragm, 28 is a J-piece that identifies the swing J plate 27 so that it can vibrate between the two frames, 30 is a voice coil suspended from the diaphragm 27 via a bobbin 31, and the magnetic f1 fluid 33 is The upper surface of cold 741 liquid 32 is used like a Tsukita-(
There is.

The diaphragm of the woofer 13 is vibrating.
Ll-force inside l vignettes 1 to 12 increases and decreases 1, this 1
The force causes the vibrating bulkhead plate 25 of the tweeter 14 to vibrate, but if the force exceeds 11 in the sealed 1-II vignette 12, the vibrating bulkhead plate 25 moves to the inside of the tweeter 14, causing the tank to vibrate. It force in 24 causes -C inlet valve 2
:( is opened, and the discharge valve 21 is opened. Conversely, if the pressure decreases, the vibrating partition plate 25 moves outward, the pressure inside the tank 24 decreases, and the discharge valve 21 opens, and the suction valve 2
3 is opened. This has the effect of rectifying pressure changes inside the seal opening key I7 vignette 12. Although the current is rectified in this way, since it is a torrent, one noge tank 22 is provided to further smooth the flow.

To this, J, the internal cold liquid 32 receives pressure 1],
Small hole 18J opening into the magnetic gap: flows into and contacts the ribbin 31, cooling the voice coil 30. The coolant 32 that has absorbed the heat of the voice coil 30 is transferred to the lower play 1-
The heat flows into the tank 24 through the second holes 20 of 17, and the heat is radiated through b5 through the heat fins 26.

Effects of the Invention - 1 - As explained above, if the present invention has J:, the woofer will have J
, Utilizing the change in air inside the sealed cabinet 1~, the cold RDL M is circulated by the vibration partition plate installed on the back side of the electrodynamic speaker, the intake valve, and the exhaust valve to generate the cold moon 1 of the voice coil. Since I decided to do this, I have the following effects! ?
can be done.

■Cold JJI liquid circulation drive allows the speaker system to drain the channel, making it extremely economical.

Q) Circulating the coolant in Ii'4'r: Cold 7.1+ has very good efficiency and can achieve high input resistance.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a tweeter made of a conventional electrodynamic speaker, Fig. 2 is a schematic cross-sectional view of a J3 LJ speaker system according to an embodiment of the present invention, and Fig. 3 is a cross-sectional view of a tweeter of the same speaker system. It is. 12... Sealing-1-Il vignette, 13... Woofer, 14... Tour r-evening, 15... Annular magnet 1~
．． 1G...Jubray 1., 17...Dobray, 1
8...Small hole, 19...First conversion, 20...Second hole, 21...Jll output I゛, 22...Leige tank, 23...Suction valve, 24... ...Tank, 25...
Vibration partition plate, 2G...radiating fin, 21...diaphragm, 30...voice full l-(ru, 31...bobbin, 3
2...Cold J111 liquid, 33...Magnetic fluid agent
Yoshihiro Morimoto Figure 1

Claims (1)

[Claims] 1. Upper plates 1 to 1 and a lower plate that sandwich an annular magnet and form an annular magnetic gap of a magnetic circuit; a voice coil located in the annular magnetic gap and fixed to a diaphragm via a bobbin; A coolant tank whose one side is constituted by a vibrating partition plate that can freely vibrate, and a surge tank that communicates with this coolant tank via a suction valve; at least one small hole formed in the F brake 1 to
a first hole that communicates between the nozzle tank and the small hole; a second hole that is formed in the lower plate and communicates between the annular magnetic gap and the coolant tank via a discharge valve; At least one tweeter consisting of an electrodynamic speaker equipped with radiation fins protruding from the outer surface of the tank,
The speaker system-TLZ is characterized by being housed in a sealed cabinet together with the woofer.