JP2008177967A - Speaker structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker structure of a speaker which can expand a region of a sound emitted from the speaker without increasing the size of the speaker itself. <P>SOLUTION: The speaker comprises a speaker case and a main body of the speaker stored in the speaker case, and is supported by a spring bearer for bearing a spring for energizing the main body of the speaker in such a manner that it can oscillate its head. In the speaker structure of the speaker, the main body of the speaker has a magnet and a bottom yoke, and the spring bearer has concave portions corresponding to air-bleeding holes formed at the magnet and the bottom yoke. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker structure of a speaker.

Conventionally, in a speaker, by providing an air vent hole in the magnet and bottom yoke located behind the speaker body, the volume of the space (back chamber) formed behind the diaphragm is increased, and a sound range that can be emitted is increased. An extended speaker is known (see, for example, Patent Document 1 and Patent Document 2).
In this type of speaker, particularly a tweeter that is a speaker for emitting high-frequency sound with strong directivity, there is a speaker configured to be able to adjust the direction of sound emitted from the speaker. This speaker has a speaker body, a speaker case in which the speaker body is housed, and a spring interposed between the speaker body and the speaker case, and the speaker body is biased forward by the spring force of the spring. When the speaker body is displaced inside the speaker case within a predetermined range, the speaker body is urged forward by a spring force while maintaining the position after the displacement. And is locked to the speaker case.
When adjusting the direction of the sound emitted from the speaker, the direction of the sound is adjusted by displacing the position of the speaker body and appropriately adjusting the direction of the speaker body.
JP-A-8-47072 JP-A-9-130889

However, since the speaker having the above-described structure needs to be provided with a spring receiver for defining the position of the spring on the bottom surface of the speaker body, the air vent holes provided in the magnet and the bottom yoke are blocked by the spring receiver. Therefore, unless the size of the speaker itself is increased, the volume of the back chamber cannot be increased, and there is a problem that the sound range that can be emitted cannot be widened.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a speaker structure of a speaker capable of extending a sound range that can be emitted without increasing the size of the speaker itself.

In order to achieve the above object, the present invention includes a speaker case and a speaker body housed in the speaker case, and the speaker body receives a spring that urges the speaker body. In a speaker structure of a speaker supported by a receiver so as to swing freely, the speaker body has a magnet and a bottom yoke, and the spring receiver is formed in an air vent hole formed in the magnet and the bottom yoke. It has the recessed part in the corresponding location, It is characterized by the above-mentioned.
According to this configuration, since the recess is formed in the spring receiver, the volume of the back chamber can be increased by the volume of the recess, and the sound range in which the speaker can emit sound can be expanded.

In the present invention, a spring receiving air vent hole may be formed in the recess.
According to this configuration, an increase in air pressure in the back chamber can be eliminated.

  In order to achieve the above object, the present invention includes a speaker case and a speaker body housed in the speaker case, and the speaker body receives a spring that biases the speaker body. In the speaker structure of the speaker supported swingably by the spring receiver, the speaker main body has a magnet and a bottom yoke, and the spring receiver is formed on the magnet and the bottom yoke. A spring receiving air vent hole is provided at a position corresponding to the hole.

  In the above invention, the speaker may be a tweeter that emits high-frequency sound.

  According to the present invention, since the recess is formed in the spring receiver, the volume of the back chamber can be increased by the volume of the recess. For this reason, it is possible to expand the sound range in which the speaker can emit sound without increasing the size of the speaker itself.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a state when the tweeters 1 and 1 according to the present embodiment are mounted on both sides of the dashboard 3 of the vehicle 2. The tweeters 1 and 1 are speakers for exclusively emitting high-frequency sounds, and are connected to the in-vehicle audio device 4 via a cable (not shown). Accordingly, the sound recorded on the CD (compact disc) inserted in the in-vehicle audio device 4 or the sound related to the radio broadcast received by the in-vehicle audio device 4 is emitted.

  By the way, in general, high-frequency sound has high directivity. Therefore, the tweeters 1 and 1 are configured to be able to adjust the direction of the sound emitted from the tweeters 1 and 1, as will be described in detail later. Accordingly, when the user feels uncomfortable with the sound emitted from the tweeters 1 and 1 or when the sound emitted from the tweeters 1 and 1 is difficult to hear, the tweeters 1 and 1 are appropriately selected. By adjusting the direction of the sound emitted from the sound, it is possible to obtain the sound most suitable for itself.

  In addition to the tweeters 1 and 1, the vehicle-mounted audio device 4 is connected to a speaker for emitting low and middle sounds (not shown) via a cable, and these speakers and the tweeters 1 and 1 are connected. Are integrated into the vehicle 2 to emit sound from the low sound range to the high sound range.

FIG. 2 is a perspective view of the tweeter 1 according to the present embodiment, and FIG. 3 is a cross-sectional view of the tweeter 1. In FIG. 3, the upper side of the drawing is referred to as “front”, and the lower side of the drawing is referred to as “rear”.
As shown in these drawings, the tweeter 1 includes a speaker body 5 and a speaker case 6 that houses the speaker body 5.

  As shown in FIG. 3, the speaker body 5 is placed in front of the bottom yoke 9 having a U-shaped cross section in which a bottom yoke air vent hole 8 is formed in the approximate center of the bottom surface 7. An annular magnet 11 having a magnet air vent hole 10 formed at a position corresponding to the bottom yoke air vent hole 8, and placed on the front of the magnet 11, and a top plate air vent at a position corresponding to the magnet air vent hole 10. And an annular top plate 13 in which holes 12 are formed.

  A voice coil 16 wound around a coil bobbin 15 is loosely inserted in a magnetic gap 14 formed in a gap formed between the outer peripheral surface of the top plate 13 and the bottom yoke 9. A convex dome-shaped diaphragm 17 is connected to the coil bobbin 15, and when a voice signal is energized to the voice coil 16 through the cable 18, the voice coil 16 is electromagnetically moved in the magnetic gap 14. In response, the diaphragm 17 vibrates and sound is emitted.

An annular speaker body locking portion 19 having a front diameter smaller than the rear diameter is fixed to the outer periphery of the bottom yoke 9. From the speaker body locking portion 19, five claw-shaped diffusers 20 for diffusing sound extend forward (see FIG. 2).
Further, on the bottom surface 7 of the bottom yoke 9, when one end of a spring 21 to be described later is locked to the bottom yoke 9, a dome-shaped spring receiver 22 is provided for defining a portion to be locked with the bottom yoke 9. The same member is integrally formed. The spring receiver 22 has a dome-shaped recess 24 in which an opening 23 is formed at a position corresponding to the bottom yoke air vent hole 8.

  In the speaker body 5, a back chamber 25 is provided in a space surrounded by the diaphragm 17, the coil bobbin 15, the top plate air vent hole 12, the magnet air vent hole 10, the bottom yoke air vent hole 8, the spring receiver 22, and the recess 24. Is formed. In general, the loudspeaker can emit a wider range of sound as the volume of the back chamber 25 is larger. In the tweeter 1, the recess 24 is formed in the spring receiver 22, and the volume of the back chamber 25 can be increased by the volume of the recess 24, so that the tweeter 1 emits sound over a wide sound range. It has a configuration that can.

On the other hand, the speaker case 6 has a cylindrical body portion 26 that is open at the front and the rear, and a bottom portion 27 that is attached to the rear of the body portion 26.
A speaker case locking portion 28 is formed in front of the body portion 26 so that the diameter of the inner periphery decreases toward the front. A recess portion 29 that is recessed outward is formed on the inner periphery of the rear portion of the body portion 26. Is formed. A curved portion 31 formed on the outer periphery of the disc-shaped spring pedestal receiver 30 is fitted in the hollow portion 29, whereby the spring pedestal receiver 30 is fixed to the speaker case 6.
A disc-shaped partition member 32 is placed on the front end of the bottom portion 27. A plurality of partition member side through holes 33 are formed in the partition member 32. The partition member side through-hole 33 has a structure in which the tip of a column 35 extending forward from the bottom surface 34 of the bottom portion 27 passes therethrough so that the partition member 32 is not shaken.

Between the speaker main body 5 and the speaker case 6, a spring 21 for supporting the speaker main body 5 is interposed inside the speaker case 6.
The rear end of the spring 21 is fixed to a disc-shaped spring base 36. The spring pedestal 36 is urged rearward by the spring force of the spring 21 and is locked to the front surface of the spring pedestal receiver 30 fixed to the speaker case. The outer periphery of the spring pedestal 36 is fitted into the curved portion 31 of the spring pedestal receiver 30, and the spring pedestal 36 does not slide on the surface of the spring pedestal receiver 30.

  The front end of the spring 21 is locked to the bottom yoke 9 with the above-described spring receiver 22 inserted in the inner periphery of the end. At this time, the spring 21 urges and supports the speaker body 5 by the spring force until the speaker body locking portion 19 is locked to the speaker case locking portion 28.

Here, when the position of the speaker body 5 is displaced inside the speaker case 6, specifically, when the speaker body 5 is slid and the angle of the speaker body 5 inside the speaker case 6 is displaced, The position after the displacement of the speaker body 5 is maintained by the balance between the frictional force generated between the speaker body locking portion 19 and the speaker case locking portion 28 and the spring force of the spring 21. . At this time, the front end of the spring 21 is guided to a predetermined position on the bottom surface 7 of the bottom yoke 9 by being guided by the spring receiver 22 inserted in the inner peripheral portion of the end in accordance with the displacement of the speaker body 5. The stopped state is maintained and the speaker body 5 is always supported.
Reference numeral 37 denotes a urethane pad for correcting the movement of the spring 21 when the spring 21 is displaced.

Next, the operation of the tweeter 1 will be described with reference to FIGS.
Here, for simplification of explanation, a user who has boarded the vehicle 2 is playing music recorded on a CD inserted into the in-vehicle audio device 4, and among the sounds related to the music, It is assumed that the sound is emitted from the tweeters 1 and 1 and the low to medium sound is emitted from another speaker (not shown) mounted on the vehicle 2. Here, it is possible to listen to low to medium sound with low directivity without worrying about the direction of arrival of the sound.

  When the user feels uncomfortable in the direction of arrival of the highly directional sound emitted from the tweeters 1 and 1 and the sound is difficult to hear, the user can press the diffuser 20 of the speaker body 5. By grasping with a finger and moving the diffuser 20, the speaker body 5 is displaced in the speaker case 6 to adjust the direction of voice arrival. This adjustment is repeated until the best sound is heard. In addition, for example, when the user feels that the sound volume is too high or the sound of the high sound range is weak, the user operates the operation unit of the in-vehicle audio device 4 to adjust the sound volume or adjust the sound range. Adjust the balance.

As described above, according to the present embodiment, since the recess 24 is formed in the spring receiver 22, the volume of the back chamber 25 can be expanded correspondingly, and sound over a wide sound range can be emitted. Can do.
FIG. 4 is a graph showing the relationship between the frequency and sound pressure of sound that can be emitted by the tweeter 1, with the horizontal axis representing frequency and the vertical axis representing sound pressure. In this figure, a curve O indicates a frequency-sound pressure relationship in a conventional tweeter, and a curve N indicates a frequency-sound pressure relationship in the tweeter 1 according to the present embodiment. As shown in this figure, according to the present embodiment, it is possible to emit sound in a wide range over a conventional tweeter.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
For example, FIG. 5A, FIG. 5B, FIG. 6A, and FIG. 6B are cross-sectional views for explaining an example of a modification of the tweeter 1. In these drawings, the same components as those shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.
As shown in FIG. 5A, a spring receiving air vent hole 38 may be formed in the recess 24 of the spring receiving 22. According to this, not only can the volume of the back chamber 25 be increased, but also the air in the back chamber 25 can be released to the space A formed between the speaker body 5 and the speaker case 6. An increase in air pressure in the chamber 25 can be eliminated. Further, as shown in FIG. 5B, a plurality of spring receiving air vent holes 38 can be formed.

  Further, as shown in FIG. 6A, the spring receiving air vent hole 38 may be formed without forming the recess 24 in the spring receiving 22. According to this, air in the back chamber 25 can be released to the space A formed between the speaker body 5 and the speaker case 6, and an increase in air pressure in the back chamber 25 can be eliminated. As shown in FIG. 6B, a plurality of spring receiving air vent holes 38 may be formed.

  Further, the speaker structure according to the present embodiment can be applied not only to the tweeter 1 that is a speaker that exclusively emits high-frequency sound but also to all speakers having the same configuration.

  Further, in the present embodiment, there are five diffusers 20, but this number can be designed arbitrarily. Further, the urethane pad 37 plays an auxiliary role of correcting the movement of the spring 21 and is not necessarily required.

It is a figure which shows a state when the tweeter which concerns on this embodiment is mounted in the both sides of the dashboard of a vehicle. It is a perspective view of the tweeter concerning this embodiment. It is sectional drawing of the tweeter concerning this embodiment. It is a graph which shows the relationship between the frequency and sound pressure in audio | voice, and is a figure for performing the comparison of the relationship of the frequency-sound pressure of the tweeter 1 which concerns on this embodiment, and the conventional tweeter. It is sectional drawing which shows the modification of the tweeter which concerns on this embodiment. It is sectional drawing which shows the modification of the tweeter which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tweeter 5 Speaker body 6 Speaker case 8 Bottom yoke air vent hole 9 Bottom yoke 10 Magnet air vent hole 11 Magnet 21 Spring 22 Spring receiver 24 Recess 25 Back chamber 38 Spring receiver air vent hole

Claims (4)

A speaker case,
A speaker body housed in the speaker case;
In the speaker structure of the speaker, the speaker main body is supported so as to swing freely by a spring receiver for receiving a spring for biasing the speaker main body.
The speaker body has a magnet and a bottom yoke,
The speaker structure, wherein the spring receiver has a recess at a location corresponding to an air vent hole formed in the magnet and the bottom yoke. The speaker structure according to claim 1, wherein a spring receiving air vent hole is formed in the recess. A speaker case,
A speaker body housed in the speaker case;
In the speaker structure of the speaker, the speaker main body is supported so as to swing freely by a spring receiver for receiving a spring for biasing the speaker main body.
The speaker body has a magnet and a bottom yoke,
The speaker structure, wherein the spring receiver has a spring receiver air vent hole at a location corresponding to the air vent hole formed in the magnet and the bottom yoke. The speaker structure according to any one of claims 1 to 3, wherein the speaker is a tweeter that emits high-frequency sound.

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