JP3380439B2 - Repulsion magnetic circuit type speaker system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repulsive magnetic circuit type speaker system.

[0002]

2. Description of the Related Art In a woofer system which is one of conventional speaker systems, for example, as shown in FIG. 2, a diaphragm 41, an edge 41a, a damper 42, an input terminal 43, a chamber 44, a voice coil bobbin 45, a voice coil 4 are provided.
6, magnet 47, yoke 48, top plate 49
The speaker unit 40 having a relatively small diameter and the frame 50 is attached to the front baffle opening 3 of the cabinet 30.
When it is used by being attached to the cabinet 1a, it further includes a diaphragm 61, an edge 61a, a damper 62, an input terminal 63, a chamber 64, a voice coil bobbin 65, a voice coil 66, a magnet 67, a yoke 68, a top plate 69 and a frame in the cabinet 30. A speaker unit 60 composed of 70 is provided so that the mounting spaces S3 and S4 of the speaker units 40 and 60 are completely partitioned by a partition member 35 mounted inside the cabinet 30, and the speaker units 40 and 60 are input terminals. There is a system in which the low frequency range is enhanced by driving with the same input signal supplied to 43 and 63 to increase the discharge amount of the air from the opening 31b of the duct 20 and the front baffle 31 to the outside of the cabinet.

Further, as shown in FIG. 3, there is also a system in which a bass is enhanced by an active speaker + passive speaker in a closed woofer system. Here, the active speaker 80 includes a diaphragm 81, an edge 81a, a damper 82,
Input terminal 83, chamber 84, voice coil bobbin 8
5, voice coil 86, magnet 87, yoke 88,
It is composed of a top plate 89 and a frame 90, is attached to the opening 31a of the front baffle of the cabinet 30, and is driven by an input signal supplied to the input terminal 83.
The passive speaker 100 includes a diaphragm 101, an edge 101a, a damper 102, a chamber 103 and a frame 104, and is attached to the opening 31c of the front baffle of the cabinet 30.

[0004]

However, in the case of the woofer system of FIG. 2, each speaker unit 4
A volume for driving 0 and 60 is required, and even if a unit having a small diameter is used, the depth of the cabinet 30 increases and the cabinet 30 cannot be downsized. Also, two systems are required for input, which increases the wiring process.

In the case of the woofer system shown in FIG. 3,
Since it uses the passive speaker 100, it becomes a sealed type,
Since the cabinet 30 requires a larger volume as compared with the bass reflex type, the cabinet size is inevitably large. Moreover, the distortion of the sound by the passive speaker 100 also increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a repulsive magnetic circuit type speaker system which solves the above-mentioned problems of the prior art and can enhance the bass without substantially increasing the volume of the cabinet.

[0007]

According to another aspect of the present invention, there is provided a repulsive magnetic circuit type speaker system in which the first and second magnets are arranged so that the same poles face each other. A repulsive magnetic circuit type speaker system in which a repulsive magnetic circuit type speaker in which two first and second vibrating systems having different calibers are arranged in a magnetic circuit via one voice coil is attached to a cabinet. The model speaker is attached to the cabinet so that sound is directly emitted to the outside from one vibration system and is emitted to the inside of the cabinet from the other vibration system.

According to another aspect of the present invention, there is provided a repulsive magnetic circuit type loudspeaker system according to the first and second aspects.
A repulsion magnetic circuit type speaker in which two first and second vibration systems having different calibers are arranged through a voice coil in a repulsion magnetic circuit in which magnets of the above are arranged so that the same poles face each other is attached to a cabinet. A repulsive magnetic circuit type speaker system, wherein the repulsive magnetic circuit type speaker has one vibration system attached to a front baffle,
The other vibration system is installed inside the cabinet,
Further, the cabinet is provided with a partition member for partitioning a space in which the repulsive magnetic circuit type speaker is mounted and a space in which sound is emitted forward from the other vibration system.

[0009]

1 is a sectional view showing an embodiment of a repulsive magnetic circuit type speaker system according to the present invention. Here, an embodiment in the case of being used in a bass reflex type speaker system is shown, and a repulsive magnetic circuit type speaker in which two resonating type magnetic circuits 2 are provided with two vibration systems 1A and 1B having different caliber via a voice coil 8. 1 is used.

In the repulsive magnetic circuit 2, the ring-shaped magnets 3 and 4 are arranged so that the same poles face each other, and generally, in order to increase the magnetic flux density, a ring-shaped center made of a magnetic material is provided between the magnets. Hold the plate 5,
The magnets 3 and 4 and the center plate 5 are held by a holder 6 made of a non-magnetic material. The holder 6 is fixed to the closed tube 33 with a mounting screw 19, and plays two roles of setting the magnets 3 and 4 and the center plate 5 at the center of the voice coil 8 and fixing them.

The two vibrating systems 1A and 1B are joined to one end of a voice coil bobbin 7, and a vibrating plate 9 having an edge 9a and a chamber 12 and a voice coil bobbin 7 are provided.
And a diaphragm 13 having a diameter larger than that of the diaphragm 9 and having an edge 13a. The voice coil bobbin 7 has two dampers 10 and 1.
4, the two dampers 10 and 14 are fixed to the frames 16 and 17 arranged so as to face each other via an annular spacer 15, respectively. The ends of the frames 16 and 17 are fixed to the front baffle 31 and the closed tube 33 of the cabinet 30 with mounting screws 18, respectively. A voice coil 8 is wound around the voice coil bobbin 7, and the voice coil 8 is electrically connected to the input terminal 15 via a tinsel wire (not shown) sewn into the damper 10.

In the above structure, when one electric input enters from the input terminal 11, the vibration systems 1A and 1A having different diameters are provided.
B vibrates up and down in phase. Therefore, the air that is moved by the vibration of the diaphragm (large diameter) 13 arranged below passes through the perforated frames 16 and 17, affecting the diaphragm (small diameter) 9 arranged above, and the cabinet Thirty
The amount of air discharged from the diaphragm 9 from the opening 31a of the front baffle 31 to the outside increases. Further, the amount of air corresponding to the diameter of the diaphragm 13 arranged below is also discharged from the duct 20 and the opening 32a attached to the back baffle 32 of the cabinet 30. By this,
Although the actual volume of the cabinet 30 does not change, it is equivalent to an increase in the volume and the bass is enhanced.

The space S1 in which the repulsive magnetic circuit type speaker 1 is mounted is a space S in which sound is emitted downward from the diaphragm 13 arranged below by the closed tube 33.
2, so that the sounds emitted from each of the diaphragms 9 and 13 in the cabinet 30 do not cancel each other out.

As described above, with the structure shown in FIG. 1, it is possible to provide good bass in a small, lightweight, and thin cabinet. Further, the speaker used uses a repulsive magnetic circuit, and two vibration systems share one magnetic circuit, so that the weight of the field unit can be reduced. In addition, the voice coil wire is sandwiched between the top and bottom 2
Linearity is good because it is supported by a single damper,
It is possible to reproduce high-quality bass with little distortion. Further, since two vibration systems can be driven by one input, the number of wiring man-hour parts can be reduced, and there is a cost advantage.

[0015]

According to the repulsive magnetic circuit type speaker system of the present invention, it is possible to provide good bass in a small, lightweight and thin cabinet.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a repulsive magnetic circuit type speaker system according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional woofer system.

FIG. 3 is a cross-sectional view showing another example of a conventional woofer system.

[Explanation of symbols]

1 Repulsive magnetic circuit type speaker 1A vibration system 1B vibration system 2 repulsive magnetic circuit 3 magnets 4 magnets 5 Center plate 6 holder 7 voice coil bobbins 8 voice coils 9 diaphragm 9a edge 10 damper 11 input terminals 12 chambers 13 diaphragm 13a edge 14 Damper 15 annular spacer 16 frames 17 frames 18 mounting screws 19 mounting screws 20 ducts 30 cabinets 31 front baffle 31a opening 32 back baffle 32a opening

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04R 1/40 310 H04R 1/28 310 H04R 9/02 103 H04R 9/06

Claims (2)

(57) [Claims] 1. A repulsive magnetic circuit in which first and second magnets are arranged so that the same poles face each other, and two first and second vibration systems having different calibers are arranged through one voice coil. A repulsive magnetic circuit type speaker system in which the repulsive magnetic circuit type speaker is attached to a cabinet, wherein the repulsive magnetic circuit type speaker is directly emitted to the outside from one vibration system, and the inside of the cabinet from the other vibration system. A repulsive magnetic circuit type speaker system, wherein the repulsive magnetic circuit type speaker system is attached to the cabinet so as to be emitted to the speaker. 2. A repulsive magnetic circuit in which first and second magnets are arranged so that the same poles face each other, and two first and second vibration systems having different calibers are arranged through one voice coil. A repulsive magnetic circuit type speaker system in which the repulsive magnetic circuit type speaker is attached to a cabinet, wherein the repulsive magnetic circuit type speaker has one vibrating system mounted on a front baffle and the other vibrating system mounted inside the cabinet. Further, a partition member for partitioning a space in which the repulsive magnetic circuit type speaker is mounted and a space in which sound is emitted forward from the other vibration system is provided in the cabinet. Repulsive magnetic circuit type speaker system.