JPS5931107Y2 - speaker - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a speaker.

In a speaker, when an audio signal is applied to the voice coil within a magnetic field, the voice coil is driven, and the vibration waves that are integrally coupled with the voice coil are moved to vibrate the air and radiate sound waves to the outside. It has become.

The voice coil is held in a predetermined position between the magnetic poles by a damper so that it can vibrate, but in order to securely hold the voice coil against vibration and improve safety,
As shown in the figure, a speaker with a double damper structure is provided in which a voice coil 2 is held by two dampers 1a and 1b.

By the way, in a conventional speaker of this type, a damper la has one end coupled to a coil bobbin 3.

A member such as a spacer was required to support the other end of 1b.

Therefore, the spacer 5 is fixed on the inside of the frame 4, and the other ends of the dampers 1a and 1b are connected to the spacer 5, but in this case, the spacer 5 simply holds the dampers 1a and 1b. The problem was that it only played a limited role.

This invention was proposed in view of the above points, and the spacer that holds the damper has functions such as heat dissipation, compatibility of speaker components, and protection of the voice coil during assembly and transportation, etc., and makes effective use of it. It is an object of the present invention to provide a speaker suitable for use in theaters, outdoor concerts, etc. where high output power is particularly required.

The present invention will be explained below with reference to the drawings.

2 to 4 show an embodiment of the present invention. In the figures, 11 is a yoke, a magnet 12 is placed on this yoke 11, and a plate 13 is placed above the magnet 12. A plate 15 is also disposed on the top of one yoke 11 to face each other via a screw 16 to form a magnetic gap 14 with the yoke 11. A magnetic circuit is formed by the magnet 12, plates 13, 15, etc., and thus the field section A is configured.

B is a vibrating section including a vibrating system, which includes a conical diaphragm 17;
The outer peripheral part of the diaphragm 17 is attached to the frame 19 via the edge 18, and the inner peripheral part on the center side of the diaphragm 17 is a cylindrical coil bobbin 2 around which a voice coil 20 is wound.
1 is integrally connected.

Each coil bobbin 21 has a first coil bobbin. One ends of the second dampers 22a and 22b are connected to each other, and the other end of the first damper 22a is a ring which is arranged between the frame 19 and the yoke 11 and is fixed to the frame 19 through screws 23. The other end of the second damper 22b is connected to the inner peripheral wall of the base end portion of the frame 19.

The spacer 24 is made of a material with good thermal conductivity, such as aluminum, and has a large number of radiating fins 24a protruding from its outer peripheral surface that extend radially outward.

Further, the inner circumferential surface 24b of the lower portion of the spacer 24 is formed to face the voice coil 20 wound around the coil bobbin 21 and to extend upward and downward in the figure so as to protect the voice coil 20.

When assembling, the field part A that constitutes the magnetic circuit is assembled in advance by a conventionally known method.

To integrate the field part A and the vibrating part B, a screw 25 is inserted from the rear into a screw hole 15a formed on the outer circumference of the plate 15, which is larger than the outer diameter of the yoke 11, and a spacer 24 is inserted. Attach by screwing onto the plate 15.

Next, the voice coil 20 is set in the magnetic gap 14 using a voice coil insertion jig, and both ends of the first damper 22a are bonded between the spacer 24 and the voice coil 20, that is, the coil bobbin 21.

Thereafter, the frame 19 is screwed onto the spacer 24 via the screw 23, and a second damper 22b is bonded between the frame 19 and the coil bobbin 21 having the voice coil 20, so that the voice coil 20 is placed in the magnetic gap 14 so as to be able to vibrate. .

Thereafter, a speaker according to the present invention can be assembled by sequentially gluing the diaphragm 17, cap 26, gasket 27, etc. in the usual manner.

In addition, in the above, the spacer 24 is screwed onto the field part A side, and then the frame 19 constituting the vibrating part B is attached to the spacer 2.
4, but if necessary, as shown in FIG. 2, after screwing the spacer 24 to the vibrating part B side, the field part A can be assembled by attaching it to the spacer 24 via the screw 25. is also possible.

In use, when an audio signal is applied to the voice coil 20, the diaphragm 17 vibrates in substantially proportion to the audio signal.
Sound waves are emitted.

In this case, Joule heat is generated in the voice coil 20 due to the audio signal, but in severe cases, in conventional speakers, there is a risk that the coil bobbin 21 may be deformed due to the heat. It is necessary to limit the maximum allowable input that can be applied to

By the way, speakers used in theaters or outdoor concerts are required to have high output, but with conventional speakers, the maximum allowable input had to be suppressed to a certain extent, making it impossible to obtain the desired sound. There was a problem.

However, in the speaker of the present invention, since the spacer 24 with good thermal conductivity is placed near the voice coil 20, the heat generated inside the speaker is absorbed by the spacer 24 and is transferred to the outside via the radiation fins 24a. Because it can dissipate light, it is extremely suitable for use as a speaker for theaters or outdoor concerts where large output is required.

In this case, as shown in FIG. 5, if a through hole 24c is formed through the spacer 24 from the inner peripheral surface to the outer peripheral surface, heat can be dissipated to the outside more efficiently through the through hole 24c. In addition, external air can be introduced into the speaker to cool the voice coil 20, and the temperature rise of the voice coil 20 can be effectively suppressed. The maximum allowed input can be increased to 20.

In addition, since speakers are generally used under harsh conditions at outdoor concerts, etc., damage such as breakage of the voice coil 20 is likely to occur in the vibration system, but in the speaker of the present invention, if the screw 25 is removed, Since the field part A and the vibrating part B can be easily separated, repair is easy, and if the vibrating part B is configured in advance as a repair part and replaced with a new vibrating part B, it is easy to repair. It is very convenient to be able to obtain a speaker with desired characteristics again.

In addition, if the vibration part B is configured by attaching the spacer 24 to the frame 19 via the screw 23, the voice coil 20
Since the periphery of the voice coil 20 is always surrounded by the inner circumferential surface 24b of the spacer 24, damage to the voice coil 20 can be prevented during assembly, repair, transportation, etc. of the speaker.

As described above, according to the present invention, the spacer is arranged between the frame and the yoke; and a field section consisting of a yoke, a magnet, a plate, etc., can be integrally coupled through a spacer, and a damper can be adhesively bonded to the spacer, and the heat generated by the voice coil can be dissipated to the outside through the spacer. Therefore, the maximum permissible input to the voice coil can be increased.

(O) Furthermore, since the speaker can be easily separated into the vibrating section and the field section via the spacer, repairs, parts replacement, etc. of the speaker are easy and convenient.

(c) Furthermore, if the vibrating part is configured by attaching a spacer to the frame, the voice coil can be protected by the spacer when it is integrally attached to the field part during assembly, or when the vibrating part is stored or transported. Damage can be prevented.

Various effects such as the following can be achieved by the spacer.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a conventional speaker, Fig. 2 is a partial sectional view showing the assembled state of the speaker according to the present invention, Fig. 3 is a partial sectional view of the present invention, and Fig. 4 is a spacer attached to the yoke. FIG. 5 is an explanatory diagram showing a different aspect of the spacer applied to the present invention. A: Field part, B: Vibration part, 11.
... Yoke, 12 ... Magnet, 13
, 15... Plate, 14... Magnetic gap, 17... Vibration plate, 18... Edge, 19... Frame, 20... ...Voice coil, 21...Coil bobbin, 22a...
...First damper, 22b... Second damper, 24... Spacer, 24a...
Radiation fin, 24b...Inner peripheral surface, 24c...
...Through hole, 26...Cap, 27...
··gasket.

Claims (1)

[Claims for Utility Model Registration] 1. A vibrating unit comprising a voice coil wound around a coil bobbin, a diaphragm integrally coupled with the voice coil, and a frame to which the diaphragm is attached via edges. and a field section including a yoke, a magnet, a plate, etc., a spacer having heat dissipation fins on the outer periphery and an inner peripheral surface facing the voice coil is disposed, and the spacer is arranged between the coil bobbin and the spacer. A speaker characterized by having an appropriate number of dampers between them. 2. The speaker as set forth in claim 1 of the utility model registration, characterized in that a spacer can be attached to and detached from the frame constituting the vibrating section and the plate constituting the field section through screws, respectively. 3. The speaker according to claim 1, wherein the spacer is provided with a through hole penetrating from the inner circumferential surface to the outer circumferential surface of the spacer.