JPS6340941Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a sensory acoustic vibration device.

The sensory acoustic vibration device not only uses the effect of an acoustic device using air propagation, but also aims to enhance the sense of presence by converting, for example, a low-frequency electric signal into mechanical vibration and allowing the user to experience it. Various specific configurations of the sensory acoustic vibration device have been proposed, but basically they include an acoustic vibration unit that generates mechanical vibrations in response to a low-frequency electric signal, and a vibrating device that is placed over the acoustic vibration unit. It has a body and is applied to, for example, sofas, beds, and car seats.

A conventional example of such a sensory acoustic vibration device is shown in FIGS. 1 and 2.

As shown in the figure, an acoustic vibration unit 1 is fitted into the center of the main surface of a filler 2 made of a hard foam material, etc., and the acoustic vibration unit 1 is attached to a flat cushion member 3 as a vibrated body together with the filler 2. is surrounded by.

In the conventional sensory acoustic vibration device configured as described above, when the acoustic vibration unit 1 is operated without a person sitting on it, high frequency components of the vibrations emitted from the acoustic vibration unit leak to the outside as noise. There was an inconvenience.

The present invention has been made in view of the above points, and its purpose is to provide a sensory acoustic vibration device that does not generate leakage noise.

The sensory acoustic vibration device according to the present invention includes an acoustic vibration unit that generates mechanical vibration in response to a low-frequency electric signal, and a flexible load-bearing vibrated body that extends along the main surface of the acoustic vibration unit that is placed on the acoustic vibration unit. a vibration transmission member that transmits the mechanical vibration to the load-carrying vibrated body; and a frame member that supports the load-carrying vibrator; both ends of the vibration transmission member are fixed to the frame member. Further, the frame members are characterized in that they do not come into contact with the load-carrying vibrated body as long as the load-carrying vibrated body is in an unloaded state.

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 3 and 4 show a sensory acoustic vibration device according to a first embodiment of the present invention. The sensory acoustic vibration device was manufactured as a chair for use at home.

As shown, the acoustic vibration unit 10 has a generally cylindrical shape. The acoustic vibration unit 10 generates mechanical vibration by, for example, setting the voice coil on the fixed side and reciprocating a magnetic circuit section serving as a driver unit in the axial direction of the cylindrical acoustic vibration unit in response to a low-frequency electric signal. As such, its specific configuration will not be described in detail here. A cushion member 11, which is made of cotton felt or urethane foam and serves as a flexible load-carrying body to be vibrated, is arranged on the acoustic vibration unit 10. The acoustic vibration unit 10 extends along the lower main surface of the cushion member 11 and is firmly coupled to a substantially central portion of a vibration transmission member 12 made of a steel plate or the like that transmits the mechanical vibrations to the cushion member 11. Below the vibration transmission member, a frame member 1 is formed into a substantially rectangular shape by bending a steel pipe, for example, and supports a cushion member 11.
3 is located, and the vibration transmitting member 12 is installed between the mutually opposing parts of this frame member 13, and its both ends are attached to the frame member by screws, etc., and a plate-shaped plate made of rubber or the like. It is fixed via an elastic member. Note that the elastic member interposed between the vibration transmitting member 12 and the frame member 13 is not limited to the plate-shaped member described above, and may be, for example, one wound around the outer periphery of the frame member 13.

As is clear from FIG. 3, the vibration transmission member 1
2 is a predetermined distance between the opposing portions of the frame member 13 from the lower main surface of the cushion member so as not to contact the cushion member 11 unless the cushion member 11 bends under a load such as when sitting. Separated. That is, when no person is sitting on the cushion member 11, there is a gap between the vibration transmitting member 12 and the cushion member 11, and high frequency components of the mechanical vibrations emitted from the acoustic vibration unit 10 leak to the outside as noise. We have learned not to do so. Incidentally, since the entire chair including its lower surface is covered with a seat member 14 made of leather or the like, leakage of the noise to the outside is further prevented.

FIGS. 5 and 6 show a vehicle seat according to a second embodiment of the present invention.

As shown in the figure, the vehicle seat is composed of a seat cushion part 16 and a seat back part 17, as usual. Seat back part 17
A headrest 18 is provided on the upper part of the seat back portion 17, and a frame member 13 provided within the seat back portion 17
A plurality of springs 13a are stretched between them to receive the load when the backrest is held. The acoustic vibration unit 10 and the vibration transmission member 12 are fixed to the frame member 13 with, for example, four screws 12a. An intermediate member 19 made of urethane foam or the like is adhered to a portion of the vibration transmitting member 12 facing the cushion member 11 and corresponding to the mounting position of the acoustic vibration unit 10. Intermediate member 1
9 and the vibration transmitting member 12 between the frame members 13 so as not to contact the cushion member 11 unless the cushion member 11 receives a load such as when resting.

Note that the same reference numerals are used for parts that are the same as or correspond to those of the sensory acoustic vibration device of the first embodiment.

As detailed above, in the sensory acoustic vibration device according to the present invention, the vibration transmitting member is configured not to contact the load-carrying driven body between the frame members unless the load-carrying vibrated body bends under the load. Therefore, high frequency components of the mechanical vibrations emitted from the acoustic vibration unit do not leak outside as noise.

[Brief explanation of drawings]

1 and 2 are diagrams showing a conventional example of a sensory acoustic vibration device, and FIGS. 3 and 4 include a side sectional view and a partial cross section, respectively, of the sensory acoustic vibration device according to the first embodiment of the present invention. FIG. 5 is a bottom view, and FIG.
The figure is a plan sectional view of essential parts of the vehicle seat. Explanation of symbols of main parts: 10...acoustic vibration unit, 11...cushion member, 12...vibration transmission member, 13...frame member.

Claims (1)

[Scope of utility model registration request] an acoustic vibration unit that generates mechanical vibrations in response to a low-frequency electric signal; The vibration transmitting member includes a vibration transmitting member that transmits to the vibrated body, and a frame member that supports the load carrying vibrated body, and the vibration transmitting member has both ends fixed to the frame member, and the load is transmitted between the frame members. A body-sensing acoustic vibration device characterized in that it does not come into contact with a supported vibrated body as long as it is in an unloaded state.