JPH01288092A - Vibrating device - Google Patents

Abstract

PURPOSE:To sense acoustic vibration efficiently in a body by connecting a flexible long tubular hollow member to a projection of each pipe from a housing and arranging the hollow member to the inside or the outer face of the elastic member receiving the pressing of a human body. CONSTITUTION:Plural pipes 56, 58 leading to either a front chamber 46 or a rear chamber 48 to the outside of the housing 42 are projected from the case 42 and a flexible long tubular hollow member 60 is connected. With an electric signal of music or the like given to an electroacoustic transducer 52, the signal is transduced into acoustic vibration and air vibration takes place in the front chamber 46 and the rear chamber 48 in the acoustic box 40. The air vibration in one chamber is propagated in each tubular hollow member 60 through the plural pipes 56, 58 in the same phase. In this case, the sound wave is propagated in the lengthwise direction while being reflected in the inner wall face in each tubular hollow member 60 and resonance is caused in the air column in the hollow member 60 and the vibration in phase is caused to the tubular face of each hollow member 60. The acoustic vibration of the hollow member 60 is propagated to the human body through the elastic members 10, 30. The air vibration in other chamber is radiated externally and reaches the ears.

Description

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

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

This device is a chair-shaped device in which a resilient member is arranged in the seat and back, and a speaker, etc. It is equipped with three electroacoustic transducers.

B A person sits on the seat and rests his or her back on the backrest.Q
Lean on me. Transferring music, etc. to an electroacoustic transducer with content
When an electric signal is input manually, this electric signal is converted into sound and acoustic vibration. This acoustic vibration is transmitted to the human body via the diaphragm and the elastic member. 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 vibration device described above transmits the acoustic vibrations generated by the electroacoustic transducer to the human body via a rigid diaphragm, so it is difficult to reduce the perceptible area of the acoustic vibrations. Increasing the size would require arranging a large number of diaphragms and attaching an electroacoustic transducer to each diaphragm. Additionally, because the diaphragm is difficult to resonate at low frequencies, the bass range lacks impact.

An object of the present invention is to provide a vibration device that solves the above problems.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the vibration device according to the present invention divides the inside of the sealed casing into a front chamber and a rear chamber by a partition plate, and divides the inside of the sealed casing into a front chamber and a rear chamber by a partition plate. An opening is provided, and an electroacoustic transducer is installed so as to face the front chamber through the opening between the chambers to close the opening between the chambers, and a plurality of vibrators communicate between either the front chamber or the rear chamber and the outside of the casing. The acoustic box is provided with an external opening that protrudes from the casing and communicates the other chamber with the outside of the casing, and further includes a flexible long tubular shape on the protrusion from the casing of each vibrator. The hollow member is connected to the elastic member and placed on the inside or outside of the elastic member that receives pressure from the human body.

[Function] When an electrical signal containing music or the like is input to the electroacoustic transducer, this electrical signal is converted into acoustic vibrations, and air vibrations are generated in the front and rear chambers of the acoustic box.

Air vibrations in one room propagate in each tubular hollow member in the same phase via a plurality of vibrators.

At this time, within each tubular hollow member, the sound waves propagate in the longitudinal direction while being reflected by the inner wall surface, and resonance occurs in the air column within this hollow member. This causes in-phase vibrations on the tube surfaces of each hollow member. The acoustic vibrations of this hollow member are transmitted through the resilient member to the human body comfortably held therein. The air vibrations in the other room are radiated to the outside of the acoustic box through the external opening and reach the ears. Therefore, people can listen to music and the like and experience it directly.

[Example] FIG. 1 is an exploded perspective view of a vibration device according to an example of the present invention.

The present invention can be applied to a vibrating device having any external shape, for example, the shape of a chair or the like can be adopted, but here, a cushion-shaped vibrating device will be described.

The vibration device 2 according to the embodiment of the present invention is formed by bonding a lower cushion material 10 and an upper shoe/john material 30. Since these cushioning materials 10, 30 are mirror-symmetrical, only the lower cushioning material 10 will be described in detail below.

The lower cushioning material 10 is an elastic member made of urethane foam, and consists of two layers: a lower low-density body 12 and a high-density layer 14 covering the upper surface. Low density body 12 and high density layer■
4 can be formed at the same time as the urethane foaming. That is, the high-density layer 14 that is naturally formed on the contact surface with the foaming jig can be used. In addition, the inner surface of the foaming jig is coated with paint in advance, and then urethane is foamed to form a high-density coating film on the urethane foam low-density body 12.
It may be transferred to At this time, if a urethane-based paint is used, the low-density body 12 and the high-density layer 14 will be of the same quality, so that they can be easily released from the mold. Note that the high-density layer 14 may be formed by bonding a face material made of high-density resin to the low-density body 12. The low density body 12 is, for example, a soft urethane foam having an open cell structure. However, the materials of the low density body 12 and the high density layer 14 are not limited to the urethane described above.

The upper surface of this lower cushioning material 1O is formed by a high-density layer 14, and has a recess 16 opening on the upper surface and a groove 1B having a semicircular cross section.
is formed. The groove 18 is connected to the lower cushion material 10.
They are formed in a series so as to be sequentially bent into a U-shape over the entire upper surface of the . Both ends 20.22 of the groove 18 communicate with the recess 16.

The acoustic box 40 is just accommodated in the recess te, and the two vibrators 51 protrude from the acoustic box 40.
3 and 58 are inserted into the ends 20.22 of the groove 18, respectively. The acoustic box 40, including both vibrators 5B and 58, is made of a high-density layer 14. of upper and lower cushioning material 10.30.
34. At this time, the upper and lower cushion materials 1
The 0.30 groove 18.38 forms a tubular hollow 60 of circular cross section. In other words, both dense layers 14.34 constitute a long, flexible tubular hollow member.

FIG. 2 is an enlarged cross-sectional view of the acoustic box 40.

As shown in the figure, the inside of the sealed casing 42 has a partition plate 44.
It is partitioned into a front chamber 46 and a rear chamber 48 by. The partition plate 44 is provided with an inter-chamber opening 50, and the side wall of the rear chamber 48 is provided with an external opening 51 that communicates this chamber with the outside of the casing. A speaker 52, which is an electroacoustic transducer, is connected to the room opening 5.
The opening 50 between the chambers is closed. The speaker 52 has a lead wire 54 for inputting an electrical signal containing music or the like.

In front of the front chamber 46, there is a 2
Book vibrators 5B and 58 protrude from the housing 42.

These vibrators 58,58 communicate with the ends 20,22 of the tubular hollow 60, as described above. In addition, although the cross section of the tubular hollow part 60 explained above is circular, its shape is arbitrary. For example, this cross-sectional shape may be flattened.

A person sits on the upper cushion material 30.

At this time, the upper and lower cushioning materials 10.30 are deformed under pressure, and their elasticity holds the human body.

When an electrical signal is input to the speaker 52 through the lead wire 54, this electrical signal is converted into acoustic vibration, and air vibrations are generated in the front chamber 46 and the rear chamber 48 in the acoustic box 40, respectively.

The air vibrations in the front chamber 4B propagate in the tubular hollow part 60 via the two vibrators 5B and 58 in the same phase.

At this time, the sound waves are generated in the high-density layer 14 within the tubular hollow portion 60.
34 and propagates in the longitudinal direction while being reflected by the hollow part B.
Resonance occurs in the air column inside O. As a result, high-density layer 1
At 4.34, in-phase vibration occurs and its amplitude increases.

The acoustic vibrations of this high-density layer 14.34 are transmitted through the low-density body 12.32 of the upper and lower cushioning materials 10.30 to the human body comfortably held therein. Air vibrations within the rear chamber 48 are radiated to the outside of the acoustic box 40 through the external opening 51 and reach the ears through the upper and lower cushioning materials to and ao.

Therefore, a person sitting on this vibrating device 2 can experience music etc. not only through his ears but also directly. Moreover,
Because the air column, which is a resonator, is long, sounds in the low frequency range resonate well, so you can enjoy music with powerful deep bass. In other words, since the vibration of the highly elastic layer 14.34 is utilized, the resonance Q is not too large, and the flat frequency characteristic extends to the low frequency range.

Moreover, since the tubular hollow part 60 for resonance is bent in a U-shape throughout the interior of the upper and lower cushioning materials 10 and 30, the acoustic vibration sensing area is large.

Note that the tubular hollow portion 60 formed by the high-density layer 14.34 may be filled with a three-dimensional continuous pore material such as Scott foam. Scotto foam is a type of urethane foam that not only has extremely good air permeability but also is highly elastic.

Therefore, even if each cushioning material 10, 30 receives pressure from the human body, it is possible to prevent the hollow portion from being blocked without disturbing the resonance of the air column within the tubular hollow portion 60. The filling material in the tubular hollow part 60 is not limited to Scott foam, but may be a three-dimensional continuous porous body made of other materials. Also, in addition to or in place of the Scott foam, the tubular hollow portion 60
A similar effect can be obtained by inserting a spiral spring inside.

FIG. 3 is an enlarged cross-sectional view showing another example of the acoustic box 40.

In this case, two vibrators 56 protruding from the housing 42
．． 58 is provided to pass through the front chamber 4B, and the rear chamber 48
and the outside of the casing. That is, these vibes 5
G and 5g penetrate both the partition plate 44 and the front wall of the front chamber 4B. External opening 51 that communicates between the front chamber 46 and the outside of the housing
is provided on the front wall of this chamber 46. The other configurations are the same as those explained in FIG. 2, so explanations will be omitted.

Also in this case, the two vibrators 5B, 5111 are communicated with both ends 20.22 of the tubular hollow part 60 formed by the high-density layer 14.34.

Among the air vibrations generated in each chamber 48, 48 in the acoustic box 40, the air vibrations in the rear chamber 48, which are excited by the rear surface of the speaker 52, are transmitted through the tubular hollow part 60 through each pipe 56, 58. Propagates in the same phase. This causes the same vibration of the high density layer 14.34 as described above,
This vibration is transmitted to the human body. Air vibrations within the vestibule 46 are radiated through the external opening 51 and reach the ear. therefore,
A person sitting on this vibrating device 2 can experience powerful bass music and the like not only through the ears but also directly as described above. Moreover, the acoustic vibration sensing area is large.

In addition, in any of the above cases, the front chamber 46 or the rear chamber 48
The number of pipes communicating between one of them and the outside of the casing 42 is not limited to two as long as it is plural.

However, sound waves of the same phase are radiated to both pipes, and the amplitude of vibrations generated in the high-density layer 14.34 increases.

In the above description, the dense layer 1 of the cushion material 10.30
4.34, a flexible long tubular hollow member is constituted, but a flexible long tube made of, for example, plastic may be embedded in the low-density body constituting the cushion.

This tube may be arranged on the outer surface of the cushion, which is opposite to the surface pressed by the human body.

The tubular hollow member explained above may be cut into two in the middle, and each cut surface may be opened. In this case, not only the surface of the tubular hollow member contributes to the perceived vibration, but also sound waves are radiated through the opening obtained by cutting. On this occasion,
By varying the length of each cutting member, multiple resonant frequencies can be obtained. Also, the pipe 58 of the acoustic box 40.
An opening whose opening degree can be adjusted may be provided in either one of the openings 58. By providing such an opening, it is possible to adjust the magnitude of the bodily vibration. Furthermore, the volume of sound that enters the ear through this opening can also be adjusted.

[Effects of the Invention] As explained above, the vibration device according to the present invention divides the inside of the sealed casing into a front chamber and a rear chamber by a partition plate, provides an opening between the chambers in the partition plate, An electroacoustic transducer is installed so as to face the front chamber through the opening, the opening between the chambers is closed, and a plurality of pipes are protruded from the housing to communicate between either the front chamber or the rear chamber and the outside of the housing. , comprising an acoustic box provided with an external opening that communicates the other chamber with the outside of the housing, further connecting a flexible long tubular hollow member to the protrusion of each pipe from the housing, Since the hollow member is arranged inside or on the outer surface of the elastic member that receives pressure from the human body, the degree of freedom in arranging the tubular hollow member is large. Therefore, it is possible to efficiently experience acoustic vibrations using at least one electroacoustic transducer, regardless of the external shape of the vibrating device. Furthermore, when the number of electroacoustic transducers is at least, the acoustic vibration sensing 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 dimensions of the electroacoustic transducer may be small.

In particular, in the vibration device according to the present invention, since the same chamber in the acoustic box is communicated with the inside of the tubular hollow member through a plurality of pipes, sound waves of the same phase are radiated to all the pipes, and the sound waves are radiated to the surface of the tubular hollow member. The amplitude of the resulting vibration increases. Therefore, the efficiency of bodily sensation vibration can be improved. Moreover, since we have an opening that communicates with the outside of the acoustic box in a room different from the room where these pipes are installed,
Sound waves can be radiated outward from the vibrating device through this opening. Therefore, the sound can be felt with the ears along with the bodily vibration.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway exploded perspective view of a vibrating device according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the acoustic box of the vibrating device shown in the previous figure, and FIG. FIG. 7 is an enlarged cross-sectional view showing a modified example of the acoustic box. Explanation of symbols 2... Vibration device, 10.30... Cushion material, 1
2, 32...Low density body, 14.34...High density layer,
18, 38...Groove, 40...Sound box, 42.
... Housing, 44 ... Partition plate, 46 ... Front chamber, 48.
... Rear chamber, 50 ... Inter-chamber opening, 51 ... External opening,
52...Speaker, 56, 58...Pipe, BO・
...Tubular hollow part. Patent applicant: Toyo Rubber Industries, Ltd. Figure 2 Figure 3

Claims (1)

[Claims] 1. The interior of the sealed housing is divided into a front chamber and a rear chamber by a partition plate, an opening between the chambers is provided in the partition plate, and an electroacoustic transducer is installed so as to face the front chamber through the opening between the chambers. The opening is closed, a plurality of pipes are protruded from the housing to communicate either the front chamber or the rear chamber with the outside of the housing, and an external opening is provided that communicates the other chamber with the outside of the housing. A sound box is provided, a flexible long tubular hollow member is connected to the protrusion of each pipe from the casing, and the hollow member is arranged on the inside or outside of the elastic member that receives pressure from the human body. vibrating device.