JP2000069586A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker by which a speaker system is made small with excellent sound quality from a low frequency sound to a high frequency sound and high sensitivity. SOLUTION: The speaker has a ring magnet 2 whose lower face is supported by a yoke 1, a 1st magnet 3 placed on a middle 1b of the yoke 1, a pot type yoke 4 that is placed on the 1st magnet 3 and placed inside the ring magnet 2, a 2nd magnet 5 that is placed in the pot type yoke 4, a 1st magnetic air gap 7 formed by an inner circumferential face of the plate 6 placed on an upper face of the ring magnet 2 and an outer circumferential face of the pot type yoke 4, a 2nd magnetic air gap formed by an outer circumferential face of a pole piece 8 placed on the 2nd magnet 5 and an inner circumferential face of the pot type yoke 4, and the 1st magnetic air gap 7 drives a diaphragm for a squaker and a woofer and the 2nd magnetic air gap 9 drives a diaphragm 20 for a tweeter.

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 has a ring-shaped magnet whose lower surface is supported by a yoke, a first magnet disposed on a central portion of the yoke, and a first magnet disposed on the first magnet. And a pot-shaped yoke disposed inside the ring-shaped magnet, a second magnet disposed in the pot-shaped yoke, and an inner peripheral surface of a plate disposed on the upper surface of the ring-shaped magnet. A first magnetic gap formed by the outer peripheral surface of the pot-shaped yoke, and a second magnetic gap formed by the outer peripheral face of the pole piece disposed on the second magnet and the inner peripheral face of the pot-shaped yoke. 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, since the diaphragm for medium and low frequency is driven by the first magnetic gap and the diaphragm for high frequency is driven by the second magnetic gap, the coaxial middle and low pitch is driven. Speaker and treble speaker can be obtained, and the centers of the sound sources from low to high are matched, and a speaker suitable for a small speaker device can be obtained.

Further, according to the present invention, since the added magnetic flux of the ring-shaped magnet and the first magnet flows through the first magnetic gap, the magnetic force of the first magnetic gap can be increased, and the sound quality can be improved. it can.

[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 concave portion in a central portion 1b.
a, the ring-shaped magnet 2 is bonded and fixed so as to support it. In this case, in this example, the S pole of the ring-shaped magnet 2 is made to abut on the flange 1a on the outer periphery of the yoke 1.

On the central portion 1b of the dish-shaped yoke 1, a disk-shaped magnet 3 having a predetermined diameter smaller than the inner diameter of the ring-shaped magnet 2 is bonded and fixed. In this case, in the present embodiment, the N pole of the disc-shaped magnet 3 is brought into contact with the central portion 1b of the yoke 1.

A pot-shaped yoke 4 is adhered and fixed on the disc-shaped magnet 3 so that the bottom of the pot-shaped yoke 4 is located on the S pole on the disc-shaped magnet 3 and inside the ring-shaped magnet 2.

A disc-shaped magnet 5 having a predetermined diameter smaller than the inner diameter of the pot-shaped yoke 4 is bonded and fixed to the inner bottom of the pot-shaped yoke 4 in the pot-shaped yoke 4.

In this case, the center axes of the yoke 1, the ring-shaped magnet 2, the disk-shaped magnet 3, the pot-shaped yoke 4, and the disk-shaped magnet 5 are made to coincide.

A ring-shaped plate 6 is bonded and fixed on the N pole on the upper surface of the ring-shaped magnet 2.
And the outer peripheral surface of the pot-shaped yoke 4 form a magnetic air gap 7.
Is formed.

In this case, the magnetic flux is, as shown in FIG. 1, the N pole of the ring magnet 2 → the plate 6 → the magnetic air gap 7 → the pot-shaped yoke 4 → the S pole of the disc magnet 3 → the N pole of the disc magnet 3 → the yoke. 1 → S-pole of the ring-shaped magnet 2 constitutes a magnetic circuit, and the magnetic fluxes of the ring-shaped magnet 2 and the disk-shaped magnet 3 are added and flow, so that the magnetic force of the magnetic gap 7 can be increased.

Further, a pole piece 8 is bonded and fixed on the N pole on the upper surface of the disc-shaped magnet 5 in the pot-shaped yoke 4, and a magnetic force is applied between the outer peripheral surface of the pole piece 8 and the inner peripheral face of the pot-shaped yoke 4. The void 9 is formed.

In this case, the magnetic flux from the N pole of the disc-shaped magnet 5 is, as shown in FIG.
The pole piece 8 → the magnetic gap 9 → the pot-shaped yoke 4 → the S pole of the disc-shaped magnet 5 and constitutes a magnetic circuit and flows.

A loudspeaker frame 10 is mounted on the upper surface of the plate 6, and a cone-shaped mid-low sound diaphragm 1 having an edge 11 provided on an outer peripheral portion of the frame 10.
2 is held by the gasket 13.

On the other hand, a voice coil bobbin 14 is attached to the inner peripheral portion of the diaphragm 12, and a voice coil 15 for the bass is wound around the voice coil bobbin 14. It is inserted into a magnetic gap 7 formed between the inner peripheral surface and the outer peripheral surface of the pot-shaped yoke 4.

The voice coil 15 for middle and low frequency is held in the magnetic gap 7 by a damper 16. As the damper 16, for example, a spiral damper obtained by impregnating a cloth with a synthetic resin is used. In addition, an audio signal of a low-middle sound from a low-middle input terminal 17 provided at a predetermined position of the frame 10 is supplied to a middle-middle sound voice coil 15 through a tinsel wire 18.

In this embodiment, the end of the edge portion 20b of the treble diaphragm 20 is fixed to the upper surface of the pot type yoke 4 via the diaphragm ring 19, and the dome portion 20a of the treble diaphragm 20 and the edge are fixed. The high-frequency voice coil 21 fixed between the coil 20 and the portion 20b is inserted into the magnetic gap 9 formed between the outer peripheral surface of the pole piece 8 and the inner peripheral surface of the pot-shaped yoke 4.

As the diaphragm 20, a thin film such as a polyester film is used. A high-pitched sound signal from a high-pitched input terminal 22 provided at a predetermined position of the frame 10 is supplied to a high-pitched voice coil 21 via a tinsel wire 23. Further, a gas permeable cap 24 for preventing dust from entering is provided so as to cover the upper surface of the voice coil bobbin 14.

According to this embodiment, the voice coil 15 for middle and low sounds provided on the diaphragm 12 for middle and low sounds is driven by the magnetic gap 7 and the voice for high sounds provided on the diaphragm 20 for high sound is provided by the magnetic gap 9. Since the coil 21 is driven, it is possible to obtain a coaxial mid-low pitch speaker and a high pitch speaker, and the center of the sound source from the low pitch to the high pitch matches, and the speaker suitable for the small speaker device. Is obtained.

Further, according to this embodiment, since the magnetic flux obtained by adding the respective magnetic fluxes of the ring-shaped magnet 2 and the disk-shaped magnet 3 flows through the magnetic gap 7, the magnetic force of the magnetic gap 7 increases, and the sound quality is improved. As a result, the resonance sharpness Q at the lowest resonance frequency of the middle / low-range sound speaker can be reduced, and the bass reproduction band can be easily expanded using a small-sized speaker box.

2 to 10 show other examples of the embodiment of the present invention. To describe the examples of FIGS.
In FIGS. 2 to 10, portions corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 2 shows an example in which the respective magnetic poles of the ring-shaped magnet 2 and the disk-shaped magnet 3 in FIG. 1 are reversed. That is, the lower surface of the ring-shaped magnet 2 that contacts the yoke 1 is an N pole, and the upper surface that contacts the plate 6 is the S pole.
The lower surface of the disk-shaped magnet 3 that contacts the yoke 1 is an S-pole, the upper surface of the disk-shaped magnet 3 that contacts the yoke 4 is an N-pole, and the other components are configured in the same manner as in FIG.

The magnetic circuit in the example of FIG.
N pole of disk-shaped magnet 3 → pot-shaped yoke 4 → magnetic gap 7 → plate 6 → S-pole of ring-shaped magnet 2 → N-pole of ring-shaped magnet 2 → yoke 1 → disk-shaped magnet 3
S pole, disk-shaped magnet 3 and ring-shaped magnet 2
The magnetic circuit in which the sum of the magnetic fluxes flows through the magnetic gap 7 and the N pole of the disc-shaped magnet 5 → the pole piece 8 → the magnetic gap 9 → the pot-shaped yoke 4 → the S pole of the disc-shaped magnet 5 and the magnetic gap 9 5, a magnetic circuit through which the magnetic flux flows, and an N pole of the disc-shaped magnet 3 → the bottom of the pot-shaped yoke 4 →
S pole of disk-shaped magnet 5 → N pole of disk-shaped magnet 5 → pole piece 8 → magnetic gap 9 → side of pot-shaped yoke 4 → magnetic gap 7 → plate 6 → S of ring-shaped magnet 2
Pole → N pole of ring magnet 2 → Yoke 1 → S pole of disc magnet 3 plus magnetic fluxes of disc magnets 3, 5 and 7 and ring magnets 2 add magnetic air gaps 9 and 7.
Is obtained.

Therefore, the magnetic force of the magnetic air gaps 7 and 9 becomes stronger than that of the example shown in FIG. 1, and the same effect as that of the example shown in FIG. 1 can be obtained in this example of FIG. There is an effect that can be improved.

FIG. 3 shows an example in which the present invention is applied to a speaker (headphone driver) used for headphones.
An outer peripheral portion of the middle / low sound diaphragm 12 is fixed to an outer peripheral portion of the plate 6 by a gasket 13 and driving of the high sound diaphragm 20 is of an electromagnetic induction type.

That is, the dome portion 20a of the diaphragm 20
The conductor piece 25 provided between the magnetic gap 9 and the edge portion 20b is inserted into the magnetic gap 9, and the coil 26 is fixed to the inner periphery of the pot-shaped yoke 4 in the magnetic gap 9.

In the present embodiment, a magnetic fluid 27 is provided between the voice coil bobbin 14 for low and middle sounds and the outer peripheral surface of the pot-shaped yoke 4 instead of the resistance material.

In order to cover the whole of the diaphragm 12,
A protective cap 28 having a predetermined number of openings 28 a is provided so as to be fixed to the outer peripheral portion of the plate 6. Others are shown in Figure 1
The configuration is the same as described above.

It can be easily understood that the magnetic circuit is configured in the example of FIG. 3 in the same manner as in the example of FIG. 2, and the same operation and effect as in the example of FIG. 2 are obtained.

In this embodiment, since the high-frequency diaphragm 20 is driven by an electromagnetic induction type, the magnetic gap 9 is formed.
Can be reduced in width.

The example of FIG. 4 is different from the example of FIG. 2 in that the outer peripheral end of the edge portion 20b of the diaphragm 20 for high sound is fixed to the upper part of the voice coil bobbin 14 for middle and low sound, and the cap 24 is omitted. The other configuration is the same as that of FIG.

It can be easily understood that the same operation and effect as in FIG. 2 can be obtained in FIG. 4 as well. Further, in the example of FIG. 4, the edge 2 of the diaphragm 20 for high sound is
0b is fixed to the voice coil bobbin 14 for the middle and low frequency range, so that the diaphragm 12 for the middle and low frequency range and the diaphragm for the high frequency range fixed to the voice coil bobbin 14 for the middle and low frequency range are connected to the middle and low frequency range. The edge portion 20b of the diaphragm 20 also oscillates and emits a sound, and the diaphragm 20 vibrates due to the driving of the high-frequency voice coil 21 of the high-frequency diaphragm 20 having a small diameter at the center and light weight in a high-frequency acoustic signal. As a result, a speaker having high sensitivity and high sound quality can be obtained.

FIG. 5 shows an example in which the S pole on the lower surface of the disc-shaped magnet 5b having a predetermined diameter smaller than the inner diameter of the pot-shaped yoke 4 in the pot-shaped yoke 4 in FIG. The pole piece 8b is bonded and fixed on the N pole on the upper surface of the disk-shaped magnet 5b, and the S pole on the lower surface of the disk-shaped magnet 5a is bonded and fixed on the pole piece 8b. The pole piece 8a is adhesively fixed on the N pole on the upper surface.
a and 8b and the inner peripheral surface of the pot-shaped yoke 4 form magnetic gaps 9a and 9b, respectively.

As shown in FIG. 5, the magnetic flux from the N pole of the disc-shaped magnet 5a is
Pole piece 8a → magnetic gap 9a → pot-shaped yoke 4 → S pole of disc-shaped magnet 5b → N of disc-shaped magnet 5b
Pole → pole piece 8b → flow through the magnetic circuit of the S pole of the disc-shaped magnet 5a and N of the disc-shaped magnet 5a.
Pole → pole piece 8a → magnetic gap 9a → pot-shaped yoke 4
→ Magnetic gap 7 → Plate 6 → S pole of ring magnet 2 → N pole of ring magnet 2 → Yoke 1 → S pole of disc magnet 3 → N pole of disc magnet 3 →
Bottom of pot-shaped yoke 4 → S pole of disc-shaped magnet 5 b →
It flows through the magnetic circuit of the N pole of the disc-shaped magnet 5b → the pole piece 8b → the S pole of the disc-shaped magnet 5a,
Let the magnetic force of a be strong.

As shown in FIG. 5, the magnetic flux from the N pole of the disk magnet 5b is N pole of the disk magnet 5b → pole piece 8b → magnetic air gap 9b → pot-shaped yoke 4 → S pole of the disk magnet 5b. While flowing through the magnetic circuit, the N pole of the disk-shaped magnet 5b → the pole piece 8b → the magnetic gap 9b → the side of the pot-shaped yoke 4 → the magnetic gap 7 → the plate 6 → the S pole of the ring-shaped magnet 2 → the ring-shaped magnet 2 N-pole → Yoke 1 → S-pole of disc-shaped magnet 3 → N-pole of disc-shaped magnet 3 → bottom of pot-shaped yoke 4 → flows through the magnetic circuit of S-pole of disc-shaped magnet 5b to form magnetic gap 9
The magnetic force of b is made strong.

In the example shown in FIG. 5, a damper 30 made of a foam is provided inside the dome portion 20a of the treble diaphragm 20, and the dome portion 20a and the edge portion 2 are provided.
0b is held in the magnetic gaps 9a and 9b.

In this case, the treble voice coil 2
1 is formed relatively long so as to be present in the magnetic gaps 9a and 9b, or the high-pitched voice coil 21 is divided into two upper and lower parts, and the respective high-pitched voice coils are present in the magnetic gaps 9a and 9b, respectively. Like so.

In the example shown in FIG. 5, the other components are the same as those in the example shown in FIG.

In the example of FIG. 5 as well, the same operation and effect as in the example of FIG. 4 can be obtained, and the voice coil 21 of the diaphragm 20 for high sound is driven by the two magnetic gaps 9a and 9b. The high-frequency diaphragm 20 is driven in a state where the magnetic forces of the two magnetic gaps 9a and 9b are added, and there is an advantage that a speaker with very high sensitivity and high sound quality can be obtained.

In the example of FIG. 6, the polarity of the ring-shaped magnet 2 and the disk-shaped magnet 3 of FIG. 5 is reversed. That is, as in the example of FIG. 1, the plate 6 is adhesively fixed on the N pole on the upper surface of the ring-shaped magnet 2, and the S-pole on the lower surface of the ring-shaped magnet 2 is fixed to the flange 1 a of the yoke 1.
Further, the N pole on the lower surface of the disc-shaped magnet 3 abuts on the central portion 1b of the yoke 1, and the pot-shaped yoke 4 is provided on the S pole on the upper surface of the disc-shaped magnet 3. Otherwise, the configuration is the same as in the example of FIG.

In the example of FIG. 6, the magnetic flux from the N pole of the disc-shaped magnet 5a is changed from the N pole of the disc-shaped magnet 5a to the N-pole.
Pole piece 8a → magnetic gap 9a → pot-shaped yoke 4 → S pole of disc-shaped magnet 5b → N of disc-shaped magnet 5b
The magnetic flux flows through the magnetic circuit of the pole → the pole piece 8b → the S pole of the disc-shaped magnet 5a, and flows through the magnetic gap 9a.

The magnetic flux from the N pole of the disc-shaped magnet 5b is changed from the N pole of the disc-shaped magnet 5b to the pole piece 8b.
→ Magnetic gap 9b → Pot-shaped yoke 4 → Disc-shaped magnet 5
The magnetic flux flows through the magnetic circuit of the S-pole of b, and flows through the magnetic gap 9b.

It can be easily understood that the same effect as that of the example of FIGS. 1 and 5 can be obtained also in the example of FIG.

FIG. 7 shows an example in which the polarity of the disk-shaped magnet 5b in FIG. 5 is reversed. That is, the N pole of the disc-shaped magnet 5b is fixed to the inner bottom of the pot-shaped yoke 4 with the N pole as the lower surface, and the pole piece 8b is fixed to the S pole of the upper face of the disc-shaped magnet 5b by adhesion.
An S pole on the lower surface of the disc-shaped magnet 5a is adhesively fixed thereon,
The pole piece 8a is bonded and fixed on the N pole on the upper surface of the disk-shaped magnet 5a.

The magnetic flux from the N pole of the disc-shaped magnet 5a in the example of FIG. 7 is calculated as follows: N pole of the disc-shaped magnet 5a → pole piece 8a → magnetic gap 9a → pot-shaped yoke 4 → magnetic gap 9
b → pole piece 8b → flow through the magnetic circuit of the S pole of the disc-shaped magnet 5a, and a magnetic flux flows through the magnetic gaps 9a and 9b.

As shown in FIG. 7, the magnetic flux from the N pole of the disc-shaped magnet 5b is
The pot-shaped yoke 4 → the magnetic gap 9b → the pole piece 8b → flows through the magnetic circuit of the S pole of the disk-shaped magnet 5b, and the magnetic flux flows through the magnetic gap 9b.

In this case, in the example of FIG.
Since the magnetic fluxes flowing through the high-frequency voice coil 21a and the low-frequency voice coil 9a are opposite to each other, the high-frequency voice coil 21 is divided into two equal parts, and one and the other correspond to the magnetic gaps 9a and 9b, respectively. The coils are wound in opposite directions. Otherwise, the configuration is the same as in the example of FIG.

It can be easily understood that the same operation and effect as in FIG. 5 can be obtained also in the example of FIG.

FIG. 8 shows an example in which the polarities of the ring magnet 2 and the disk magnet 3 in FIG. 7 are reversed as in FIG. 6, and in this example of FIG. 8, the disk magnets 5a and 5b are used. The magnetic flux from the N pole flows through the same magnetic circuit as in the example of FIG. 7, and the magnetic flux from the N pole of the disk magnet 5b changes from the N pole of the disk magnet 5b → the bottom of the pot-shaped yoke 4 → the disk magnet. S pole of 3 → N pole of disk magnet 3 → Yoke 1 → S of ring magnet 2
Pole → N pole of ring-shaped magnet 2 → Plate 6 → Magnetic air gap 7 → Side of pot-shaped yoke 4 → Magnetic air gap 9b → Pole piece 8b → Flow through magnetic circuit of S pole of disc-shaped magnet 5b. The magnetic force of 9b is made strong.
Other configurations are the same as in the example of FIG.

It can be easily understood that the same operation and effect as those of FIGS. 7 and 6 can be obtained also in the example of FIG.

The example of FIG. 9 differs from the example of FIG.
Are formed integrally so as to be continuous with the outer peripheral edge portion 20b. The rest is configured similarly to the example of FIG.

It can be easily understood that the same operation and effect as in the example of FIG. 4 can be obtained also in the example of FIG.

The example shown in FIG. 10 is different from the example shown in FIG. 7 in that the inner peripheral side of the diaphragm for middle and low frequency sound, for example, cone paper, is integrally formed so as to be continuous with the outer peripheral edge portion 20b of the diaphragm for high frequency sound 20. The rest is configured similarly to the example of FIG.

It can be easily understood that the same operation and effect as in the example of FIG. 7 can be obtained in the example of FIG.

It should be noted that 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.

[0060]

According to the present invention, the diaphragm for medium and low frequency is driven by the first magnetic gap and the diaphragm for high frequency is driven by the second magnetic gap. Speaker and treble speaker can be obtained,
The center of the sound source from the bass to the treble matches, and a speaker suitable for a small speaker device can be obtained.

Further, according to the present invention, since the added magnetic flux of the ring-shaped magnet and the first magnet flows through the first magnetic gap, the magnetic force of the first magnetic gap can be increased and the sound quality can be improved. it can.

[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.

FIG. 3 is a sectional view showing another example of the embodiment of the present invention.

FIG. 4 is a sectional view showing another example of the embodiment of the present invention.

FIG. 5 is a sectional view showing another example of the embodiment of the present invention.

FIG. 6 is a sectional view showing another example of the embodiment of the present invention.

FIG. 7 is a sectional view showing another example of the embodiment of the present invention.

FIG. 8 is a sectional view showing another example of the embodiment of the present invention.

FIG. 9 is a sectional view showing another example of the embodiment of the present invention.

FIG. 10 is a sectional view showing another example of the embodiment of the present invention.

[Explanation of symbols]

1 yoke, 1a flange, 1b center, 2
Ring-shaped magnet, 3, 5, 5a, 5b disk-shaped magnet, 4-pot pot-shaped yoke, 6-plate, 7,
9, 9a, 9b {magnetic gap, 10} frame, 12
振動 Medium bass diaphragm, 14 ‥‥ Voice coil bobbin, 1
5 ‥‥ middle and low frequency voice coil, 17 ‥‥ middle and low frequency input terminal, 20 ‥‥ high frequency diaphragm, 21 ‥‥ high frequency voice coil, 22 ‥‥ high frequency input terminal, 24 ‥‥ air permeable cap

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ryo Yamagishi 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Naotaka Kakuta 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F term (reference) 5D012 BB03 BB04 BB05 BC05 CA01 DA04 FA01

Claims (5)

[Claims] 1. A ring-shaped magnet whose lower surface is supported by a yoke, a first magnet disposed on a central portion of the yoke, and disposed on the first magnet and inside the ring-shaped magnet. A pot-shaped yoke, a second magnet disposed in the pot-shaped yoke, an inner peripheral surface of a plate disposed on an upper surface of the ring-shaped magnet, and an outer peripheral surface of the pot-shaped yoke. First
And a second magnetic gap formed by an outer peripheral surface of a pole piece disposed on the second magnet and an inner peripheral surface of the pot-shaped yoke. A loudspeaker, wherein a diaphragm for middle and low frequency is driven and a diaphragm for high frequency is driven by the second magnetic gap. 2. The speaker according to claim 1, wherein the high-frequency diaphragm is driven by an electromagnetic induction type. 3. A ring-shaped magnet whose lower surface is supported by a yoke, a first magnet disposed on a central portion of the yoke, and disposed on the first magnet and inside the ring-shaped magnet. A pot-shaped yoke, a second magnet disposed in the pot-shaped yoke, an inner peripheral surface of a plate disposed on the upper surface of the ring-shaped magnet, and an outer peripheral surface of the pot-shaped yoke. First
And a second magnetic gap formed by the outer peripheral surface of the pole piece disposed on the second magnet and the inner peripheral surface of the pot-shaped yoke. The diaphragm for medium and low frequency is driven and the diaphragm for high frequency is driven by the second magnetic gap, and the outer periphery of the diaphragm for high frequency is attached to the diaphragm for medium and low frequency. A speaker characterized by being supported by a voice coil bobbin. 4. The speaker according to claim 3, wherein the second magnet disposed in the pot-shaped yoke is constituted by two magnets sandwiching a pole piece. 5. The loudspeaker according to claim 3, wherein an outer periphery of the high-frequency diaphragm and the diaphragm for middle and low frequencies are continuous.