JPH0282800A - Audio-vibration device - Google Patents

Abstract

PURPOSE:To expand an audio-vibration generating area, to efficiently transmit a bass sound, and to prevent noise generation by having a structure in which a flexible tube is pinched by means of two cushioning materials, and sticking and fixing the flexible tube to the respective cushioning material in a longitudinal direction. CONSTITUTION:A sound oscillating device 2 is constructed so that two sheet cushioning materials 20 and 30 may pinch a curved flexible tube 10 to drive the audio-vibration of the internal air pole and a driver unit 40. The both cushioning materials 20 and 30 consist of urethane foam cut materials, the marginal parts of them are mutually stuck, and surround the flexible tube 10 and the driver unit 40. At such a time, the flexible tube 10 is stuck and fixed to the respective cushioning materials 20 and 30 approximately at any position in the longitudinal direction. Thus, the powerful bass sound having the large audio-vibration generating area can be reproduced, and the noise generation can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an acoustic vibration device that transmits acoustic vibrations to a human body.

[Prior Art] A conventional acoustic vibration device is disclosed in Japanese Utility Model Application Publication No. 51-123793.

This device is in the form of a chair with a seat and a backrest made of cushioning material, and a speaker is attached to the back of each part via a rigid diaphragm.

A person sits on a seat and leans his or her back against the backrest. When an electrical signal containing music or the like is input to a speaker, this electrical signal is converted into acoustic vibrations. This acoustic vibration is transmitted to the human body via the diaphragm and the cushioning material. A person sitting on the seat can experience music etc. not only through his ears but also directly.

[Problems to be Solved by the Invention] The conventional acoustic vibration devices described above transmit the acoustic vibrations generated by the speaker to the human body through a diaphragm made of a rigid body. As a result, it was necessary to arrange a large number of diaphragms and to attach a speaker to each diaphragm. Furthermore, since the diaphragm does not easily resonate at low frequencies, there is a problem in that the bass range lacks impact.

In order to solve this problem, it is conceivable to bend a flexible tube, sandwich it between two cushioning materials, and drive the acoustic vibration of the air column inside the tube with a speaker. However, when a flexible tube is dot-bonded to each cushioning material to fix the tubes, a gap is created between the tube and the cushioning material in the unbonded area, so if acoustic vibration occurs in the tube, the cushioning material may be damaged. A noise is generated by being hit by the tube.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an acoustic vibration device that has a large acoustic vibration generation area (and can reproduce powerful bass sounds, and does not generate noise).

[Means for Solving the Problems] The acoustic vibration device according to the present invention has a structure in which a bent flexible tube driven by acoustic vibration of an internal air column is sandwiched between two cushioning materials. It is characterized in that the flexible tube is adhesively fixed to each cushion material at almost any position in the longitudinal direction.

[Function] When the acoustic vibration of the internal air column is driven in a bent flexible tube, the tube wall surface generates acoustic vibration. This acoustic vibration propagates through the cushioning material and is transmitted to the human body. Moreover, since the tube and each cushioning material are in close contact with each other at almost any position along the entire length of the flexible tube,
The flexible tube and the cushioning material vibrate together without generating noise.

[Example] The present invention can be applied to an acoustic vibration device having an arbitrary external shape, and for example, the shape of a chair or the like can be adopted, but an example in the case of a cushion shape will be described below.

1 and 2 are an enlarged vertical sectional view and an exploded perspective view, respectively, of an acoustic vibration device according to an embodiment of the present invention.

The acoustic vibration device 2 includes a flexible tube 10 and a driver unit 40 made of two sheets of sosion material 20.30.
It has a structure sandwiched between.

The flexible tube IO is a bellows-shaped tube made of polypropylene, vinyl chloride resin, or the like, and is sequentially bent into a U-shape over almost the entire surface of the sheet-like cushioning material 20.30.

The length of the tube IO is suitably 1 to 5 m. however,
The cross-sectional shape is arbitrary. Both ends 1 of flexible tube IO
8.18 is a driver unit 40 with a built-in speaker
They are respectively connected to the tips of two pipes 56 and 58 protruding from the base.

The cushioning materials 20 and 30 are both urethane foam-cut materials, and their peripheral edges are adhered to each other to enclose the flexible tube IO and the driver unit 40. At this time, the flexible tube 10 is adhesively fixed to each cushion material 20, 30 at almost any position in the longitudinal direction.

Moreover, after applying adhesive to the outer peripheral surface of the flexible tube IO, this is sandwiched between both cushion materials 20 and 30, and the first
As shown in the figure, both cushioning materials 20 and 30 are pressed in the vertical direction so that the contact portion with the flexible tube 10 is depressed, and the flexible tube IO and both cushioning materials 20 and 30 are adhered to each other. Since the contact area between the two is large, adhesive fixation is reliable. Note that if the outer circumferential surface of the flexible tube 10 is subjected to surface treatment to improve adhesive strength before applying the adhesive, the adhesive fixation of the flexible tube 10 will be more reliable. Examples of adhesive strength improvement treatments include:
Examples include coating a primer or surface treatment using plasma, corona, or the like.

FIG. 3 is an enlarged longitudinal sectional view of the driver unit 40.

The inside of the rectangular parallelepiped-shaped housing 42 having a low height is partitioned into an upper chamber 4B and a lower chamber 48 by a partition plate 44 bent in an L shape. That is, the lower chamber 48 has a rectangular parallelepiped shape, but the upper chamber 46 consists of a thin rectangular parallelepiped-shaped chamber section above the lower chamber 48 and another rectangular parallelepiped-shaped chamber section extending downward from the side of this section. An opening 50 is provided in the partition plate 44, and a speaker 52 is mounted so as to face the upper chamber 46 through the opening 50. This speaker 52 has a lead wire 54 for inputting an electrical signal containing music or the like. A circular opening is provided in the side wall 43 of the thin housing 42, and a pipe 5B having a circular cross section is fitted into this opening.

At this time, one end of the pipe 56 protrudes outward from the side wall 43, but the other end does not protrude into the interior of the casing 42. Another pipe 5B having a circular cross section penetrates the side wall 43 and is fitted into an opening provided in the hanging portion 45 of the partition plate 44. This pipe 58 also has one end protruding outward from the side wall 43,
The other end does not protrude into the lower chamber 48.

A person leans against the cushion-shaped acoustic vibration device 2.

At this time, the cushioning materials 20 and 30 are deformed under pressure, and their elasticity holds the human body. Flexible tube I
The space within O is a curved elongated space that originates from the driver unit 40 and enters this unit again. The air column in this space is connected to the speaker 52 in the driver unit 40.
The acoustic vibrations are driven by This air column vibration causes wall vibration of the flexible tube 10, and this wall vibration propagates to the human body through the cushioning material 20, 30.

More specifically, when an electrical signal is input to the speaker 52 through the lead wire 54, this electrical signal is converted into acoustic vibration. At this time, via the upper chamber 4G provided in front of the speaker 52 in the driver unit 40,
Sound waves are radiated into the flexible tube 10 through the pipe 5B. The emitted sound waves propagate in the longitudinal direction of the tube while being reflected by the wall surface of the flexible tube 10 and reach the driver unit 40 again. The sound waves propagated to the driver unit 40 are guided into the lower chamber 48 , that is, to the rear of the speaker 52 through the pipe 58 . The sound waves guided into the lower chamber 48 are reflected by the inner wall of this chamber, and are guided back into the flexible tube 10 through the pipe 58 along with the sound waves radiated backward from the speaker 52. Therefore, a standing wave is formed within the flexible tube 10, and the air column within the tube resonates in a low frequency range. At this time, the pressure wave traveling inside the flexible tube 10 collides with the inner wall surface at the bent portion, causing the wall surface to vibrate well. The acoustic vibrations of the tube 10 propagate through the cushioning material 20, 30 and are transmitted to the human body.

Therefore, a person leaning against the acoustic vibration device 2 can experience music etc. not only through the ears but also directly. Moreover, since the air column, which is a resonant resonator, is long, it resonates well in the low frequency range, so you can enjoy music with powerful deep bass. Further, the space for resonance resonance is the cushion material 20. (Because it is bent in a U-shape over the entire O, the area where you can experience acoustic vibration is large.

Although the acoustic vibration device 2 described above includes the driver unit 40, both ends of the flexible tube IO
B, 18 may be made to protrude from the cushion material 20.30, and the driver unit 40 may be attached externally.

[Effect of the invention] As explained above, the acoustic vibration device according to the present invention has the following effects:
It has a structure in which a bent flexible tube that is driven by the acoustic vibrations of the internal air column is sandwiched between two pieces of cushioning material.
There is a large degree of freedom in arranging the flexible tube, that is, in arranging the resonance space.

Therefore, without being limited by the external shape of the acoustic vibration device,
Acoustic vibrations can be efficiently generated using at least one speaker. Furthermore, when the number of speakers is at least, the acoustic vibration generation area can be increased. Moreover, since it utilizes the resonance of long air columns, it has a powerful bass range and can transmit heavy bass tones in music with high efficiency.

Therefore, the size of the speaker may be small.

Moreover, in the acoustic vibration device according to the present invention, although the flexible tube is adhesively fixed to each cushion material at almost any position in the longitudinal direction, the flexible tube and the cushion material vibrate together, generating noise. is prevented.

[Brief explanation of the drawing]

FIG. 1 is an enlarged longitudinal sectional view of an acoustic vibration device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the acoustic vibration device shown in the previous figure, and FIG.
The figure is an enlarged longitudinal sectional view of the driver unit shown in the previous figure. Explanation of symbols 2...Acoustic vibration device, IO...Flexible tube, 2
0°30...Cushion material, 40...Driver unit, 52...Speaker. Figure 2 Figure 1

Claims (1)

[Claims] 1. It has a structure in which a bent flexible tube driven by the acoustic vibration of the internal air column is sandwiched between two pieces of cushioning material, and this flexible tube is adhesively fixed to each cushioning material at almost any position in the longitudinal direction. An acoustic vibration device characterized by: