JPH042556Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a chair equipped with a speaker body and a vibrating body that are driven based on a music signal or the like.

(Prior Art) Conventionally, as shown in FIG.
installed above and below the speaker 10 and the vibration device 1.
A chair is known that sends a music signal from an audio device (not shown) to the speaker 10, generates an audio signal at an audible frequency from the speaker 10, and generates vibration or heavy bass from the vibration device 11. Utility Model No. 58-119282).

In the conventional chair, as described above, the speaker 10
Unless the and vibration device 11 are installed separately on the backrest 13 of the chair 12, it is not possible to enjoy the realistic sound of voice and vibration, and the installation work becomes complicated and costly due to the increase in the number of parts. Taka was invited.

In order to solve these drawbacks, we developed the
An audio device according to No. 168382 has been proposed.

This audio device has a first speaker body that generates audio signals in the medium and high frequency ranges and a second speaker body that generates audio signals in the low frequency range, and each speaker body has a separate magnetic circuit. The voice coil of each speaker body is inserted into a magnetic gap made up of each magnetic circuit.

According to this audio device, by increasing the output of the speaker body in the bass range, it is possible to generate vibrations and heavy low temperatures, so a single audio device can simultaneously output an audio signal of an audible frequency and vibration or heavy bass. can.

(Problem to be solved by the invention) However, in the latter acoustic device, each speaker body is configured with a separate magnetic circuit, so the disadvantage of an increase in the number of parts has not been sufficiently solved, and Since the voice coil of the speaker body is inserted into each narrow magnetic gap to generate vibrations, the number of turns of the voice coil is limited, making it difficult to generate large vibrations.

The purpose of the present invention is to provide a chair in which the speaker body and the vibrating body share the same component parts to reduce the number of parts, and the vibrating body can generate large vibrations. be.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a chair having a speaker body that generates an audio signal of an audible frequency and a vibrating body that generates vibrations or deep bass. a magnetic circuit of the body is connected to an annular magnet and one magnetic pole of the magnet,
A disc-shaped pole yoke whose center penetrates into the inner space of the magnet is connected to the other magnetic pole of the magnet, and whose end located inside the magnet is connected to the penetrating portion of the pole yoke with a first magnetic field. an annular plate, the end portion of which is spaced apart via a gap and located outside the magnet, extends toward the pole yoke and is spaced apart from the outer peripheral edge of the pole yoke via a second magnetic gap; The voice coil of the speaker body is inserted into the first magnetic gap, and the excitation coil of the vibrating body is wound in a planar manner facing the second magnetic gap at a distance.

(Function) According to the present invention, the first magnetic gap in which the voice coil of the speaker body is inserted into the magnetic circuit of the speaker body, and the second magnetic gap facing the excitation coil of the vibrating body are provided. The magnetic circuit of the speaker body also serves as the magnetic circuit of the vibrating body.

In addition, the excitation coil of this vibrator is not inserted into the second magnetic gap, but is wound in a planar manner facing the second magnetic gap at an interval. Even if it is narrow, the number of turns of the excitation coil can be increased.

(Embodiment) FIGS. 1 to 4 show an embodiment of the present invention, and the same components as those of the conventional example are denoted by the same reference numerals. That is, 12 is a chair consisting of a back rest part 13 and a seat part 14, and two speaker devices 20 are installed in mounting holes 13a on both sides of the upper part in the back part 13, and in the lower part of the seat part 14. is provided with legs 15.

The speaker device 20 consists of a speaker body A and a vibrating body B.

The speaker body A is composed of a disk-shaped magnetic circuit 30 consisting of a magnet 31, a plate 32, and a pole yoke 33, a frame 40, a diaphragm 41, a bobbin 42, and a voice coil 43. In the magnetic circuit 30, an annular plate 32 and a disc-shaped pole yoke 33 are joined to both sides of a flat annular magnet 31, that is, to different magnetic pole faces. Moreover, in the center of this pole yoke 33, there is a center pole portion 3 that penetrates inside the magnet 31.
3a is provided protrudingly. Furthermore, the plate 32 has an inner end surface than the magnet 31 and a center pole portion 33a.
An annular first magnetic gap 34 is formed in the center hole 32a between the two. On the other hand, the outer end of the plate 32 from the magnet 31 is connected to the pole yoke 3.
A second magnetic gap 3 is provided between the outer peripheral edge 33b of the
5 is formed. Further, the diaphragm 41 is attached to the frame 40 so as to be able to freely vibrate, and the diaphragm 41
A voice coil 43 wound around a bobbin 42 integral with the first magnetic gap 34 is inserted into the first magnetic gap 34.
The frames 40 are respectively attached to the open ends of the attachment holes 13a of the backrest portion 13.

The vibrating body B includes an upright wall 44 having an inner and outer double circular shape,
45 and a flat donut-shaped iron housing 46 with one side open, an excitation part 48 formed of an excitation coil 47 wound in a multilayer manner between the upstanding walls 44 and 45, and a spring plate 49. It is made up of
The opening side of the excitation section 48 is provided facing the second magnetic gap 35, and the respective upright walls 44, 45
The distal end thereof is closely opposed to the outer peripheral edge 33b of the pole yoke 33 located at the peripheral edge of the second magnetic gap 35 and the lower part 32d of the side plate 32c of the plate 32, respectively. Further, the spring plate 49 has a connecting piece 49a extending radially from the ring-shaped central portion toward the back surface of the housing 46 and further extending in the circumferential direction of the housing 46.
The tip of 9a is attached to the housing 46 via a rivet 50, and the center portion is attached to a presser plate 51.
It is vibably connected to a support column 52 extending downward from the center pole portion 33a via the center pole portion 33a. In addition, 5
3 is a lead wire, and 54 is a case that accommodates the magnetic circuit 30 and the vibrating body B.

In such a configuration, when an audio signal current is passed through the lead wire 53 from an audio device (not shown),
In the speaker body A, the magnetic flux generated by the voice coil 43 acts on the magnetic flux 34a of the magnet 31 generated in the first magnetic gap 34, and the coil 43 moves in the axial direction, vibrates the diaphragm 41, and generates the normal audio frequency. Generates an audio signal. In addition, in the vibrating body B, the magnetic flux 48a caused by the excitation part 48 is the magnetic flux 35 of the magnet 31 generated in the second magnetic gap 35.
a, and the excitation section 48 vibrates in the axial direction.
This vibration is caused by the mechanical resistance of the spring plate 49 and the excitation part 4.
8 Only the low frequency is faithfully extracted by its own mass, and this vibration is transmitted to the yoke 33, magnet 31,
The sound is transmitted to the backrest 13 through the plate 32 and frame 40, and is extracted as vibration or deep bass sound. As a result, a sound, vibration, or deep bass sound is generated from the backrest 13 of the chair 10.

A first magnetic gap 3 into which the voice coil of the speaker body A is inserted into the magnetic circuit 30 of the speaker body A.
4 and the second part facing the excitation coil 47 of the vibrating body B.
A magnetic gap 35 is provided, and the magnetic circuit 30 of the speaker body A also serves as the magnetic circuit of the vibrating body B.

Furthermore, the excitation coil 47 of this vibrating body B is not inserted into the second magnetic gap 35, but is wound around the second magnetic gap 35 in a planar manner with an interval therebetween. Even if the second magnetic gap 35 is narrow, the number of turns of the excitation coil 47 can be increased and large vibrations can be generated.

Although the above embodiment describes the chair 12 having legs 14, it goes without saying that the same effect can be obtained even if the speaker device 20 is attached to a reclining seat or a chair of an automobile (not shown).

(Effects of the invention) As explained above, according to the invention, the first magnetic gap in which the voice coil of the speaker body is inserted into the magnetic circuit of the speaker body, and the second magnetic gap in which the excitation coil of the vibrating body faces each other. A magnetic gap is provided, and since the magnetic circuit of the speaker body also serves as the magnetic circuit of the vibrating body, the number of parts is reduced.

In addition, the excitation coil of this vibrator is not inserted into the second magnetic gap, but is wound around the second magnetic gap in a planar manner at a distance from the second magnetic gap. Even if the area is narrow, the number of turns of the excitation coil can be increased, thereby making it possible to generate large vibrations in the vibrating body.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of the chair, and FIG. 3 is an enlarged bottom view of the speaker device, FIG. 4 is an explanatory diagram of the magnetic flux effect of the speaker device, and FIG. 5 is a perspective view showing a conventional chair. In the figure, 12...chair, 20...speaker device,
A... Speaker body, B... Vibrating body.

Claims (1)

[Claims for Utility Model Registration] Speaker body A that generates an audio signal at an audible frequency
and a vibrating body B that generates vibrations or deep bass sounds, the magnetic circuit 30 of the speaker body A is joined to an annular magnet 31 and one magnetic pole of the magnet 31, and the center is connected to the magnet 31. A disc-shaped pole yoke 33 that penetrates into the inner space of the pole yoke 33 is connected to the other magnetic pole of the magnet 31, and an end located inside the magnet 31 is connected to a first magnetic field in the penetrating portion of the pole yoke 33. The magnet 3 is spaced apart via a gap 34.
1 extends toward the pole yoke 33 and forms the outer peripheral edge 33b of the pole yoke 33.
and an annular plate 32 separated from each other via a second magnetic gap 35, the voice coil 43 of the speaker body A is inserted with the first magnetic gap 34, and the excitation coil 47 of the vibrating body B is inserted with the first magnetic gap 34. A chair characterized in that the second magnetic gap 35 is wound in a planar manner facing the second magnetic gap 35 at an interval.