JPH0822110B2 - Acoustic sensor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention converts electrical acoustic signals output from various audio equipment, arcade game machines, home game machines, etc. into mechanical vibrations and transmits them to the human body. About the acoustic sensor that was made. The present invention particularly relates to an acoustic sensor that vibrates the outer wall of a container containing the speaker by the sound pressure of the sound emitted from the speaker and transmits the vibration to the body.

[0002]

2. Description of the Related Art Generally, an acoustic sensor of the above type has a basic structure in which a partition wall is provided inside a container so as to divide the interior space into two parts, and a speaker is attached to an opening provided in the partition wall. . When the speaker is driven, the outer wall of the container is vibrated by the sound pressure of the sound emitted by the speaker.

For example, Japanese patent application, Japanese Patent Laid-Open No. 2-2
Japanese Patent No. 66797 discloses an example of the above-described acoustic sensor. In particular, in the one described in FIG. 4 of the publication, a container containing a speaker is formed into a flat disc shape by laminating a pair of diaphragms formed by molding a synthetic resin into a dish shape. A partition wall that divides the inside of the container into two parts in the thickness direction is formed of a relatively hard material such as wood, and a speaker is attached to an opening provided in the partition wall.

[0004]

However, when the inside of the container is completely partitioned by the partition wall like the acoustic sensor disclosed in the above publication, sufficient vibration cannot be generated over the entire outer wall of the container. However, there is a problem that a satisfactory sensory effect cannot be obtained.

If a speaker with a large diameter and a large output is used as the speaker mounted on the partition wall, the vibration generated on the outer wall of the container can be increased, and the low-pitched sound can be improved. It is necessary to increase the size of the entire container in order to accommodate the speaker having the aperture, and the weight of the acoustic body as a whole is increased, and the manufacturing cost is increased. Therefore, it is not suitable for an acoustic sensor as a peripheral device for an inexpensive video game machine.

Therefore, an object of the present invention is to provide an acoustic sensor which is capable of obtaining a sufficient sensation vibration even when a speaker having a small caliber and a low output is used and also capable of sufficiently transmitting a low-frequency sound to the body. Is to provide. Another object of the present invention is to provide an acoustic sensor that is small in size and lightweight and can be manufactured at low cost while obtaining a sufficient acoustic effect.

[0007]

In order to achieve the above object, an acoustic sensor according to the present invention comprises a container, a partition wall that divides the internal space of the container into a first chamber and a second chamber, and The partition wall is provided with a speaker attached to an opening provided in the partition wall, and the partition wall is preferably formed of a member capable of bending and vibrating, and the partition wall is provided with air between the first chamber and the second chamber. It is characterized by the provision of through holes that allow circulation.

In a preferred embodiment, the peripheral edge of the partition wall is supported on the inner surface of the partition wall via an elastic member. Further, the entire container or at least the portion of the container facing the partition wall, that is, the portion that directly or indirectly contacts the body of the user is formed of a member capable of flexural vibration.

[Action and effect]

According to the structure of the present invention, the partition wall to which the speaker is attached is formed of a member capable of bending and vibrating inside the container. Therefore, when the speaker is driven, the entire partition wall is vibrated along with the vibration of the cone paper, and it is as if the diameter of the speaker is enlarged. Therefore, the sound pressure of the sound emitted by the speaker is increased, and a sufficient sound, particularly a low-pitched sound can be obtained even if a small-diameter speaker is used.

Further, according to the structure of the present invention, the partition wall that divides the internal space of the container into the first chamber and the second chamber is provided with the through hole that allows the air flow between the first chamber and the second chamber. It is provided. Therefore, the flexural vibration of the partition due to the vibration of the speaker is further enhanced, and the sound pressure is further increased by the effect of narrowing the sound generated when the air passes through the holes due to the vibration of the partition. The vibration of the outer wall of the container due to the pressure can be effectively increased.

As a general result of the above, even if a small-diameter speaker is used, sufficient vibration can be generated on the outer wall of the container, particularly low-frequency vibration is sufficient, and sound clarity is improved. . Further, the size of the entire acoustic sensor can be reduced and the acoustic sensor can be manufactured at low cost.

The effect of increasing the sound is further enhanced by supporting the peripheral edge of the partition wall on the inner wall of the container through the elastic member in the preferred embodiment. This is because factors that hinder the vibration of the partition wall due to the vibration of the cone paper of the speaker are reduced.

When the peripheral portion of the partition wall is supported by the inner wall of the container through the elastic member as in the preferred embodiment, useless direct vibration transmission to the container is reduced, so that the sound clarity is improved. It also has the effect of increasing significantly.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the accompanying drawings.

The acoustic sensor of the present invention comprises a container 1 and a partition wall 4 which divides the internal space of the container into a first chamber 5 and a second chamber 6.
And a speaker 7 attached to the opening of the partition wall 4. In the embodiment, the container 1 is formed into a cylindrical shape by combining two half-split cases 2 and 3 which are formed of semi-rigid polypropylene into a cylindrical shape with a bottom. A tubular joint 12 is fitted on the inner surface of the cylindrical portion of each of the half-split cases 2, 3 so that the half-split cases 2, 3 are integrated. The halved cases 2 and 3 are each made of semi-rigid polypropylene, so that they can be deformed by external force as a whole.
Since 2 is fitted inside, the rigidity is increased. However, the circular bottom surfaces of the halved cases 2 and 3 can be flexibly deformed and flexurally vibrated by the sound pressure generated by the speaker 7, which will be described later.

The partition wall 4 is preferably formed of a semi-rigid member such as polypropylene which is strong and easily vibrates like the material forming the container 1. An opening is provided at the center of the partition wall 4, and a speaker 7 having a relatively small diameter is attached so as to match the opening.

The partition wall 4 is also supported via an elastic member 10 on the inner surface of the cylindrical side wall of the container 1, that is, on the inner peripheral surface of the cylindrical joint 12 in the embodiment. The elastic member 10 is formed of highly airtight polyurethane foam, rubber, or the like, has an annular groove 11 that fits and holds the peripheral edge of the partition wall 4, and the outer peripheral portion has the tubular joint 12 described above.
It is fixed with an adhesive or the like to the inner surface of the.

Further, the partition wall 4 is provided with a through hole 9 which allows air movement between the first chamber 5 and the second chamber 6 in the container 1 which divides the partition wall into two.

Further, in the second chamber 6 of the container 1, a speaker driving amplifier 13 having a frequency halving circuit and a connector 14 for connecting a power cord and the like are housed.

In the above structure, when the speaker 7 is driven, the partition wall 4 itself on which the speaker 7 is mounted can be flexibly deformed, and the outer peripheral portion of the partition wall 4 has the elastic member 10 interposed therebetween to form the container 1. Since the partition wall 4 is supported by the inner wall of the speaker 7, the partition wall 4 can vibrate with the vibration of the cone paper 8 of the speaker 7. This means speaker 7
Means that even if the diameter of the speaker is small, it produces the same sound pressure generating effect as if the diameter of the speaker 7 is expanded.
Sufficient sound pressure can be generated. In particular, despite the small diameter of the speaker 7, sufficient deep bass can be generated, and the sharpness of the sound becomes very excellent.

Moreover, the partition wall has a first chamber 5 inside the container.
Since the through hole 9 that connects the second chamber 6 and the second chamber 6 is provided, the vibration of the partition wall 4 due to the vibration of the cone paper 8 when the speaker 7 is driven is further enhanced.
The sound pressure of sound is increased by the effect of narrowing down the sound generated when passing through the through hole 9 when the partition wall 4 vibrates. As a result, the vibration generated on the outer wall of the container, that is, the bottom surface of each of the half cases 2 and 3 is effectively increased. as a result,
When the speaker 7 is driven in a state where the body is in contact with the container 1, a sufficient sound, particularly a deep bass can be sufficiently sensed, and the sound clarity thereof is extremely excellent.

As described above, in the acoustic sensor according to the present invention, it is possible to obtain sufficient and high quality sensory sound even if the diameter of the speaker is reduced, so that the price can be reduced and the compact design can be achieved. It will be possible.

When the container 1 is molded from semi-rigid polypropylene as in the embodiment, since the polypropylene has both toughness and flexibility, the sound emitted from the speaker can be faithfully and vividly put on the body. It can be transmitted, is familiar to the body, and has sufficient strength and life to withstand rough use. And
When the container 1 is formed of polypropylene, it has various advantages that it is easy to blow-mold, the manufacturing cost is very low, and it is lightweight. Therefore, it is possible to further reduce the weight and the cost of the acoustic sensor of the present invention. Can be promoted.

Of course, the scope of the invention of the present application is not limited to the above-described embodiments, and various design changes within the spirit of the claims are all included in the scope of the invention of the present application. Is. For example, the partition wall 4 may be formed of semi-rigid synthetic resin, or may be formed of cardboard or the like. The partition wall 4 preferably has a certain degree of flexibility such that it can be flexibly deformed, but if the peripheral edge portion of the partition wall 4 is supported by the inner wall of the container via the elastic member 10, it will have a certain degree of rigidity. It doesn't matter.

On the contrary, if the partition wall 4 is constructed so as to have flexibility capable of bending and vibrating, the peripheral portion of the partition wall 4 is elastic member 1.
Even if it is connected to the inner surface of the container without interposing 0, it is possible to expect the same effect as described above.

According to the experiment, it is preferable that the through hole 9 provided in the partition wall 4 is provided at a position as close to the outer peripheral portion of the partition wall 4 as possible, apart from the speaker 7, and at only one place rather than a plurality of places. , It has been found that the acoustic effect is good.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an example of an acoustic sensor of the present invention.

2 is a vertical sectional view of the acoustic sensor shown in FIG. 1. FIG.

[Explanation of symbols]

 1 Container 2 Half Case 3 Half Case 4 Partition Wall 5 First Chamber 6 Second Chamber 7 Speaker 8 Cone Paper 9 Through Hole 10 Elastic Member 11 Annular Groove 12 Cylindrical Joint 13 Amplifier 14 Connector

Claims (4)

[Claims] 1. A container, a partition wall that divides the internal space of the container into a first chamber and a second chamber, and a speaker attached to an opening provided in the partition wall. An acoustic sensor, which is formed of a member capable of bending and vibrating, and in which this partition wall is provided with a through hole that allows air flow between the first chamber and the second chamber. 2. The acoustic sensor according to claim 1, wherein a peripheral edge of the partition wall is supported by an inner surface of the container via an elastic member. 3. A container, a partition wall that divides the inner space of the container into a first chamber and a second chamber, and a speaker attached to an opening provided in the partition wall. A through hole that allows air to flow between the first chamber and the second chamber is provided, and the partition wall has a peripheral edge supported by an inner surface of the container via an elastic member. , Acoustic sensor. 4. The acoustic sensor according to claim 1, wherein at least a portion of the container facing the partition wall is formed of a member capable of flexural vibration.