JP2000069587A - Speaker - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] A speaker having a small speaker device and excellent sound quality and high sensitivity from low to high frequency. SOLUTION: A first ring-shaped magnet 2 fixed on a flange 1a on an outer periphery of a dish-shaped yoke 1, a disc-shaped magnet 3 fixed on a center part 1b of the dish-shaped yoke 1, and the disc-shaped magnet 3, a yoke 4 with a center pole, in which a flange portion 4b and a center pole 4a arranged in the first ring-shaped magnet 2 are integrated, and a second ring fixed on the flange portion of the yoke with the center pole Between the inner peripheral surface of the first plate 7 disposed on the first ring-shaped magnet 5 and the outer peripheral surface of the second plate 8 disposed on the second ring-shaped magnet. A magnetic gap 9, an inner peripheral surface of the second plate, and a second magnetic gap 10 between the center pole portions 4a of the yoke with the center pole are provided. Is driven, and The high frequency diaphragm 21 is driven by the second magnetic gap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker suitable for being applied to a small speaker device.

[0002]

2. Description of the Related Art
In a small speaker device, it is very difficult to install a loudspeaker for treble on the baffle plate of a limited speaker box, to center the sound sources from low to high, and to align the positions of the sound sources. Was.

When a speaker for middle and low sounds and a speaker for high sounds are installed vertically on the speaker box, the size of the speaker box is increased by the size of the speaker for high sounds, and the speaker for high sounds is used for middle and low sounds. There is a problem that the sound quality is deteriorated due to the vibration from the speaker.

[0004] In view of the above, the present invention proposes a speaker that can be downsized and has good sound quality and high sensitivity from low to high frequency.

[0005]

A speaker according to the present invention comprises a first ring-shaped magnet fixed on a flange on the outer periphery of a dish-shaped yoke, and a disc-shaped magnet fixed on the center of the dish-shaped yoke. A yoke with a center pole formed integrally with a flange portion and a center pole portion disposed on the disk-shaped magnet and in the first ring-shaped magnet; and on a flange portion of the yoke with the center pole. The fixed second ring-shaped magnet and the first
The inner peripheral surface of the first plate disposed on the ring-shaped magnet and the second peripheral surface disposed on the second ring-shaped magnet
A first magnetic gap formed between the outer peripheral surface of the first plate and a second magnetic pole formed between the inner peripheral surface of the second plate and the center pole portion of the yoke with the center pole.
And the first magnetic gap drives the diaphragm for middle and low sounds, and the second magnetic gap drives the diaphragm for high sounds.

According to the present invention, the diaphragm for middle and low frequencies is driven by the first magnetic gap and the diaphragm for high frequencies is driven by the second magnetic gap. A low-pitched speaker and a high-pitched speaker can be obtained, and the center of the sound source from the low pitch to the high pitch matches, so that a speaker suitable for a small speaker device can be obtained.

Further, according to the present invention, since the magnetic flux obtained by adding the respective magnetic fluxes of the first ring-shaped magnet and the disk-shaped magnet flows through the first magnetic gap, the magnetic force of the first magnetic gap is increased. And sound quality can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a speaker according to the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 1 denotes a dish-shaped yoke having a recess in a central portion 1b, and a ring-shaped magnet 2 is bonded and fixed on a flange 1a on the outer periphery of the dish-shaped yoke 1 so as to be supported. In this case, in this example, the dish-shaped yoke 1
The N pole of the ring-shaped magnet 2 is brought into contact with the flange 1a on the outer periphery of.

A disk-shaped magnet 3 having a predetermined diameter smaller than the inner diameter of the ring-shaped magnet 2 is bonded and fixed on the concave portion of the central portion 1b of the dish-shaped yoke 1. in this case,
In this example, the S pole of the disc-shaped magnet 3 is in contact with the central portion 1b of the dish-shaped yoke 1.

A flange portion 4b of a yoke 4 with a center pole in which a flange portion 4b and a center pole portion 4a are integrally formed so as to be located on the N pole on the disk-shaped magnet 3 and inside the ring-shaped magnet 2. Is adhered and fixed on the N pole on the upper surface of the disc-shaped magnet 3.

The ring magnet 5 is bonded and fixed on the flange portion 4b of the yoke 4 with the center pole and inside the ring magnet 2. In this case, the S pole of the ring-shaped magnet 5 is brought into contact with the flange portion 4b of the yoke 4 with the center pole. At this time, a magnetic gap 6 is formed between the outer peripheral surface of the flange portion 4b of the yoke 4 having the center pole and the inner peripheral surface of the concave portion of the central portion 1b of the dish-shaped yoke 1.

In this case, the center axes of the dish-shaped yoke 1, the ring-shaped magnet 2, the disk-shaped magnet 3, the yoke 4 with the center pole, and the ring-shaped magnet 5 are matched.

A ring-shaped plate 7 is bonded and fixed on the S-pole on the upper surface of the ring-shaped magnet 2, and a ring-shaped plate 8 is bonded on the N-pole on the upper surface of the ring-shaped magnet 5 and inside the ring-shaped plate 7. It is fixed so that a magnetic gap 9 is formed between the inner peripheral surface of the plate 7 and the outer peripheral surface of the plate 8.

In this case, as shown in FIG. 1, the magnetic gap 9 has an N-pole of the ring-shaped magnet 5 → a plate 8 → a magnetic gap 9 → a plate 7 → an S-pole of the ring-shaped magnet 2 → an N-pole of the ring-shaped magnet 2. Pole → dish-shaped yoke 1 → magnetic gap 6
→ Flange part 4b of yoke 4 with center pole → Flux flowing through magnetic circuit of S pole of ring magnet 5 and N pole of ring magnet 5 → Plate 8 → Magnetic gap 9 →
Plate 7 → S pole of ring magnet 2 → N pole of ring magnet 2 → plate-shaped yoke 1 → Disc magnet 3
, The N pole of the disc-shaped magnet 3, the flange portion 4b of the yoke 4 with the center pole, and the magnetic flux flowing through the magnetic circuit of the S pole of the ring-shaped magnet 5 flow, thereby strengthening the magnetic force of the magnetic gap 9. be able to.

Further, a magnetic gap 10 is formed between the inner peripheral surface of the plate 8 and the center pole portion 4a of the yoke 4 having the center pole. In this case, the magnetic air gap 10
As shown in FIG. 1, the N-pole of the ring-shaped magnet 5 →
The magnetic flux flowing through the magnetic circuit of the plate 8 → the magnetic gap 10 → the center pole yoke 4 → the S pole of the ring-shaped magnet 5 flows.

An inner peripheral portion of the speaker frame 11 is mounted on the upper surface of the plate 7. An outer peripheral portion of the diaphragm 13 for middle and low frequency sounds made of cone paper having an edge 12 provided on the outer peripheral portion of the frame 11. It is held by the gasket 14.

On the other hand, a voice coil bobbin 15 for low and middle sounds is attached to the inner peripheral portion of the diaphragm 13 for low and middle sounds, and a voice coil 16 for low and middle sounds is attached to the voice coil bobbin 15.
, And the mid-low voice coil 16 is
Is inserted into a magnetic gap 9 formed between the inner peripheral surface of the plate 8 and the outer peripheral surface of the plate 8.

The mid-low-frequency voice coil 16 is held in the magnetic gap 9 by a damper 17. As the damper 17, for example, a spiral damper in which cloth is impregnated with a synthetic resin is used. Also, an audio signal of a low-middle sound from a low-middle input terminal 18 provided at a predetermined position of the frame 11 is supplied to a middle-middle sound voice coil 16 through a tinsel wire 19.

In the present embodiment, the edge 2
0 is fixed to the inner peripheral surface of the voice coil bobbin 15 for middle and low frequency sound.

In this case, the resonance frequency of the edge 20 provided on the outer peripheral portion of the high frequency diaphragm 21 is made relatively high, and the middle low frequency diaphragm 13 and the high frequency diaphragm 21 Work together.

On the other hand, a treble voice coil bobbin 22 is mounted on the inner peripheral portion of the treble diaphragm 21, a treble voice coil 23 is wound around the voice coil bobbin 22, and the treble voice coil 23 is mounted on a plate. 8 and the center pole part 4 of the yoke 4 with the center pole
a into the magnetic gap 10 formed between them.

A high-frequency sound signal from a high-frequency input terminal 24 provided at a predetermined position of the frame 11 is supplied to a high-frequency voice coil 23 via a tinsel wire 25. Further, a cap 26 for preventing dust from entering is provided so as to cover the upper surface of the voice coil bobbin 22 for treble.

According to the present embodiment, the magnetic gap 9 drives the middle / low sound voice coil 16 provided on the middle / low sound diaphragm 13 and the magnetic gap 10 provides the high sound for the high sound diaphragm 21 provided on the high sound diaphragm 21. Since the voice coil 23 is driven, it is possible to obtain a coaxial medium-low-pitched speaker and a high-pitched speaker, and the centers of the sound sources from low to high are matched, which is suitable for a small speaker apparatus. A speaker is obtained.

Further, according to this embodiment, since the magnetic flux obtained by adding the respective magnetic fluxes of the ring-shaped magnets 2, 5 and the disk-shaped magnet 3 flows through the magnetic gap 9, the magnetic force of the magnetic gap 9 increases, The sound quality is improved, and the resonance sharpness Q at the lowest resonance frequency of the middle and low range speaker can be reduced, and the bass reproduction band can be easily expanded using a small speaker box.

Further, according to the present embodiment, the outer periphery of the high frequency diaphragm 21 is fixed to the middle / low frequency voice coil bobbin 15 and the resonance frequency of the edge 20 of the high frequency diaphragm 21 is relatively high. In the middle and low frequency sound signal, the middle and low frequency vibration plate 13 and the high frequency vibration plate 21 vibrate integrally to radiate sound. The high-frequency diaphragm 21 vibrates and emits sound by driving the voice coil 23 for use, so that a speaker with high sensitivity and high sound quality can be obtained.

FIG. 2 shows another embodiment of the present invention. In the description of FIG. 2, portions corresponding to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the example of FIG. 2, the polarities of the two ring-shaped magnets 2 and 5 in the example of FIG. 1 are reversed. That is, the S-pole of the ring-shaped magnet 2 is bonded and fixed on the flange 1 a on the outer periphery of the dish-shaped yoke 1, the plate 7 is bonded and fixed on the N-pole of the ring-shaped magnet 2, and the N-pole of the ring-shaped magnet 5 is fixed. The plate 8 is adhesively fixed on the flange portion 4b of the yoke 4 with the center pole, and the plate 8 is adhesively fixed on the S pole of the ring-shaped magnet 5.

In this case, as shown in FIG. 2, the N pole of the disc-shaped magnet 3 → the flange portion 4b of the yoke 4 with the center pole → the magnetic gap 6 → the dish-shaped yoke 1 → the S pole of the disc-shaped magnet 3 Magnetic flux flowing through the magnetic circuit and the N pole of the ring-shaped magnet 5 → the yoke 4 with the center pole
Flange portion 4b → magnetic air gap 6 → dish-shaped yoke 1 → S-pole of ring-shaped magnet 2 → N-pole of ring-shaped magnet 2 →
Plate 7 → magnetic gap 9 → plate 8 → a magnetic flux of the sum of the magnetic flux flowing through the magnetic circuit of the S pole of ring-shaped magnet 5 flows, and the magnetic force of magnetic gap 6 is stronger than the magnetic force of magnetic gap 9. Therefore, in the example shown in FIG. 2, the middle / low sound voice coil 16 for driving the middle / low sound diaphragm 13 is inserted into the magnetic gap 6.

The magnetic flux flowing through the magnetic circuit of the N-pole of the ring-shaped magnet 5 → the yoke 4 with the center pole → the magnetic gap 10 → the plate 8 → the S-pole of the ring-shaped magnet 5 flows through the magnetic gap 10.

In the example shown in FIG.
Is rigidly connected to the inner peripheral side of the voice coil bobbin 15 for middle / low-pitched sound. When the outer periphery of the treble diaphragm 21 is rigidly connected to the inner periphery of the middle / low sound voice coil bobbin 15, the middle / low sound diaphragm 13 and the treble diaphragm 21 can be operated integrally. Other configurations are the same as in the example of FIG.

In the example of FIG. 2 as well, the magnetic flux of the sum of each of the ring-shaped magnets 2, 5 and the disk-shaped magnet 3 flows through the magnetic gap 6, and the magnetic force of the magnetic gap 6 can be increased. It can be easily understood that the same operation and effect as in the example of FIG. 1 can be obtained in the example of FIG.

In order to drive the treble diaphragm 21 of the above-described example, an electromagnetic induction type drive composed of a conductor piece and a coil may be used instead of the voice coil 23.

The present invention can of course be applied to a headphone speaker (headphone driver) in the same manner as described above.

Further, the present invention is not limited to the above-described example, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0036]

According to the present invention, the first and second magnetic gaps are used to drive the middle and low tone voice coils provided on the middle and low tone diaphragm, and the second magnetic gap is provided to the high tone tone diaphragm. Since the voice coil for treble is driven, it is possible to obtain a coaxial mid-low speaker and a treble speaker, and the center of the sound source from low to high matches.
A speaker suitable for a small speaker device can be obtained.

According to the present invention, a magnetic flux obtained by adding the respective magnetic fluxes of the first and second ring-shaped magnets and the disc-shaped magnet to the first magnetic air gap flows. , The sound quality is improved, and the resonance sharpness Q at the lowest resonance frequency of the middle and low range speaker can be reduced, and the bass reproduction band can be easily expanded using a small speaker box.

Further, according to the present invention, since the outer periphery of the diaphragm for high sound is fixed to the voice coil bobbin for middle and low sound,
In the middle and low frequency sound signal, the middle and low frequency diaphragm and the high frequency diaphragm vibrate together to radiate sound, and in the high frequency sound signal, the center voice is small in diameter and light in weight. Since the high-frequency diaphragm vibrates and emits sound by driving the coil, a high-sensitivity, high-quality speaker can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of a speaker of the present invention.

FIG. 2 is a sectional view showing another example of the embodiment of the present invention.

[Explanation of symbols]

1 ‥‥ dish-shaped yoke, 1a ‥‥ flange, 1b ‥‥ center,
2,5 ‥‥ ring magnet, 3 マ グ ネ ッ ト disc magnet, 4 ‥‥ center pole yoke, 4a ‥‥ center pole section, 4b ‥‥ flange section, 6,9,10 ‥‥ magnetic gap, 7,8 {Plate, 13} Mid / low frequency diaphragm, 15, 22} Voice coil bobbin, 16} Mid / low frequency voice coil, 21} High frequency diaphragm, 23} High frequency voice coil

Continued on the front page (72) Inventor Ryo Yamagishi 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Naotaka Katsuta 6-35-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Company F term (reference) 5D012 BB03 BB04 BB05 DA04 FA01

Claims (3)

[Claims] A first ring-shaped magnet fixed on a flange on the outer periphery of the dish-shaped yoke; a disc-shaped magnet fixed on a central portion of the dish-shaped yoke; and on the disc-shaped magnet and A yoke with a center pole formed integrally with a flange portion and a center pole portion disposed in the first ring-shaped magnet; and a second ring-shaped magnet fixed on the flange portion of the yoke with the center pole And a first plate formed between an inner peripheral surface of a first plate disposed on the first ring-shaped magnet and an outer peripheral surface of a second plate disposed on the second ring-shaped magnet. Magnetic gap, and the second
And a second magnetic gap formed between the inner peripheral surface of the plate and the center pole portion of the yoke with the center pole, and the first magnetic gap drives a diaphragm for middle and low sounds. And a high-frequency diaphragm driven by the second magnetic gap. 2. A first ring-shaped magnet fixed on a flange on an outer periphery of a dish-shaped yoke; a disc-shaped magnet fixed on a central portion of the dish-shaped yoke; and on the disc-shaped magnet and A yoke with a center pole formed integrally with a flange portion and a center pole portion disposed in the first ring-shaped magnet; and a second ring-shaped magnet fixed on the flange portion of the yoke with the center pole A first magnetic gap formed between an outer peripheral surface of a flange portion of the yoke with the center pole and the dish-shaped yoke; and an inner peripheral surface of a plate disposed on the second ring-shaped magnet. A second magnetic gap formed between the yoke with the center pole and a center pole portion of the yoke with the center pole, and driving the diaphragm for middle and low frequencies with the first magnetic gap. Speaker is characterized in that so as to drive the diaphragm for high-frequency band in the second magnetic gap. 3. The speaker according to claim 1, wherein an outer peripheral portion of the high frequency diaphragm is supported by a voice coil bobbin attached to the middle and low frequency diaphragm. Speaker.