JPH0132453Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sensory acoustic device that can be attached to and detached from the backrest of a driver's seat or a passenger's seat in a vehicle such as an automobile.

In general, in automobiles, the low frequency range is masked by road noise, engine noise, vibrations, etc., so the low frequency sound and sense of realism tend to be lacking. To compensate for this, there are graphic equalizers, super woofers, etc., but under the special conditions of the interior of a car, it is impossible to avoid a dull, muffled sound, and when the volume is increased. Passengers, especially passengers in the rear seats, feel noisy, and the driver also has difficulty hearing external sounds, making driving dangerous.

In view of this, in recent years, seats in which a sensory acoustic device is incorporated into the seat body have been developed. This inputs the low frequency signal of the music signal and vibrates the seat itself. This vibration is transmitted directly to the listener's body without using air as a medium, so the sound waves transmitted from the ears and this vibration wave are mixed within the listener's body, creating a powerful sound that can be felt throughout the listener's body. You can get deep bass and a sense of presence.

However, conventional sensory acoustic devices of this type are sold by being built into the seat body by the manufacturer, and cannot be installed at will after the purchase of a vehicle or in an existing vehicle.

Therefore, in recent years, some sensory acoustic devices have been sold as units, but since these devices are built into and fixed to the backrest or seat of the seat body, installation requires the removal of the seat cover or the seat body itself. The installation work has to be done by removing it from the car, which makes the installation work difficult, and there have been problems such as owners being unable to install it even if they purchase it.

The present invention was created in view of the above points, and its purpose is to provide a sensory acoustic device that can be easily and quickly attached to the seat body, and that can also be removed once attached. It is something to do.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

First, Figure 1 shows the basic drive unit 1.
, A indicates a frame shaped like a container, and has a flange A ₁ on the outer peripheral edge, and a stepped portion A ₂ is formed on the inner wall of the outer peripheral wall.

A magnetic circuit B is arranged in the space of the frame A, and the magnetic circuit B is supported by the stepped portion _A2 of the frame A via a damper C around the magnetic circuit B. The magnetic circuit B is formed by having an annular magnet _B3 attached to a yoke _B2 having a center pole _B1 , and a top plate _B4 fixed to the magnet _B3 .

A voice coil D is wound around a bobbin D1 in an air gap of the magnetic circuit B, and _one end of the bobbin _D1 is fixed to a holder plate E. The holder plate E is disposed to cover the opening of the frame A, and its peripheral edge is fixed to the step _A2 of the frame A together with the outer peripheral edge of the damper C by an adhesive F.

Braking material G is loaded in the space between the center pole _B1 and the holder plate E, and the part surrounded by the bobbin _D1 . This braking material G is made of a rubber material, a sponge material such as polyurethane foam, a viscous material, or a felt material.

Furthermore, the braking material G is also loaded into the space between the frame A and the yoke B ₂ and applies braking to the magnetic circuit B itself. The space surrounded by C and C is an air chamber H, and this air chamber H is opened to the atmosphere through a ventilation hole _A3 made in the frame A. And the frame A
The flange _A1 is attached to the vibration transmission member described later.

Therefore, when a low-frequency audio signal is applied to the voice coil D, the frame A and the magnetic circuit B are displaced relative to each other due to the magnetic interference between the magnetic force generated in the voice coil D and the magnetic force between the magnetic caps. Vibration occurs. This vibration is transmitted from the frame A to the vibration transmission member, and further transmitted from the vibration transmission member to the listener via the seat body.

Next, an electric circuit for driving the drive unit 1 having the structure described above will be explained with reference to FIGS. 2 and 3a.

In FIG. 2, a is a stereo playback device, b is a left and right channel speaker driven by the output from the stereo playback device a, and c is a mixer for mixing the left and right output signals from the stereo playback device a;
d is a volume that adjusts the level of the output signal from the mixer c; e is a low-pass filter that cuts out high-frequency signals in the output signal from the volume d and passes only low-frequency signals; f is for deep bass reproduction. This is an output amplifier.

In this circuit, the left and right output signals from the stereo playback device a are mixed by the mixer c, and their levels are adjusted by the volume d.
Only the deep bass signal is outputted by the low-pass filter e and amplified by the output amplifier f, and the drive unit 1 is driven by the output thereof.

On the other hand, the circuit of FIG. 3a has a level compression circuit g and a first
A low-pass filter h is connected. In this circuit, the reproduction signal from the mixer c is controlled to an appropriate level by the level compression circuit g, thereby preventing damage caused by the large output of the drive unit 1, and the amount of vibration. The characteristics of the physical sensation and the physical sensation will be a curve like A○ shown in Figure b, and as the amount of vibration increases, it will be felt rapidly in the body, so the compression circuit will change the curve characteristic as shown by B○. By doing so, it is visually felt to be linear like the curve shown in C○, and the first low-pass filter h cuts out high-frequency components, and the second low-pass filter e cuts out the high-frequency components. Since this circuit is the same as the above-mentioned circuit except that unnecessary high-frequency components are cut, a description of its operation will be omitted.

Next, a device for attaching the drive unit 1 driven by the above-described circuit to the backrest 2a of the chair body 2 of an automobile will be explained with reference to FIGS. 4a to 4c.

In FIGS. 4a to 4c, reference numeral 2 denotes a backrest in the chair body of the driver's seat and passenger seat of the automobile, and the upper side 3a of the pipe frame 3 formed on the backrest 2.
Mounting pipes 4, 4 are provided, and a pair of legs 6, 6 of the headrest 5 are fitted into these mounting pipes 4, 4, and these legs 6, 6 are used to create a sensory acoustic device 7 of the present invention. is installed.

This sensory acoustic device 7 is comprised of a drive unit 1 attached to the backrest 2 via legs 6, 6, a control section 9, a tape recorder 10, and speaker units 11, 11.

The vibration transmission member 8 includes arm portions 8a, 8a that extend along the upper surface of the backrest portion 2 and are bent downward substantially at right angles at both ends of the upper surface;
and a mounting piece portion 8b extending along the back surface of the
A control unit 9 and a tape recorder 10 are attached to the downwardly bent portions of the arm portions 8a, 8a (portions located on both sides of the upper part of the backrest portion 2), and the headrest 5 of the arm portions 8a, 8a is attached to both sides of the head rest 5. Speaker units 11, 11 are rotatably mounted via a substantially U-shaped support frame 12 at a position (a position not touched by the human body), and the drive unit 1 is screwed to the mounting piece 8b.

Elongated mounting holes 8c, 8c are formed at the center of the upper surface of the vibration transmitting member 8, and the legs 6, 6 are removably inserted into these mounting holes 8c, 8c, thereby attaching the vibration transmitting member 8. is attached to the upper surface of the backrest portion 2. The distance between the mounting holes 8c and 8c is the same as the legs 6 and 6.
When the legs 6, 6 are inserted, a part of the outer peripheral surface of the legs 6, 6 is pressed against a part of the inner peripheral surface of the mounting holes 8c, 8c. . This eliminates looseness between the legs 6, 6 and the mounting holes 8c, 8c.

The control section 9 is a controller for the drive unit 1, and adjusts the strength of vibration.

A cover member 13 made of synthetic resin is provided on the vibration transmission member 8 and the drive unit 1 in order to protect passengers in the rear seats and improve the design effect.
A large number of ventilation holes 13a for heat radiation are formed in the portion of the cover member 13 that covers the drive unit 1.

Although not shown, the power supply lines for the drive unit 1, control unit 9, tape recorder 10, and speaker units 11, 11 are combined into one, and the power outlet of the power supply line is connected to a cigarette lighter installed on the dash board of the vehicle. Power can also be supplied by inserting it into the retlighter section.

Further, the drive unit 1 may be screwed between the mounting holes 8c, 8c, and in this case, the mounting piece 8b can be omitted.

When attaching the sensory acoustic device 7 to the backrest 2, first remove the headrest 5 from the backrest 2, place the vibration transmission member 8 on the upper surface of the backrest 2, and attach the legs 6, 6. The legs 6, 6 are inserted into the mounting pipes 4, 4 again through the mounting holes 8c, 8c with the gap slightly narrowed, and the headrest 5 is mounted. Thereby, the sensory acoustic device 7 is attached to the upper surface of the backrest portion 2 without any play. When replacing or removing the sensory acoustic device 7,
Attach legs 6, 6 to pipes 4, 4 and mounting holes 8c, 8
Just pull it out from c.

When the drive unit 1 is driven, the vibration transmission member 8 is vibrated by the drive unit 1, and this vibration is transmitted to the pipe frame 3 via the legs 6, 6. Therefore, the pipe frame 3 vibrates, and the left and right legs 3 of this pipe frame 3 vibrate.
The spring member 14 provided between b and 3b vibrates, thereby causing the entire backrest portion 2 to vibrate. At this time, music is played from the left and right speaker units 11, 11, and while listening to this music, the player can experience deep bass in the music from the backrest 2. The strength of the vibration is adjusted by operating the knob 9a of the control section 9.

As explained above, according to the present invention, the vibration transmission member provided with the drive unit is attached to the backrest using the legs of the headrest, so there is no need to modify the chair during installation, making it easy for the user to install. It can be attached and removed, and it can also be attached to chairs of various car models. Furthermore, unlike those built into the backrest, there is no risk of damaging the cushioning properties of the seat.

Furthermore, the vibrations from the drive unit are transmitted to the backrest via the vibration transmission member, headrest legs, and frame, so the entire backrest vibrates instead of locally, allowing you to experience soft deep bass. .

Furthermore, an acoustic device such as a control section or a tape recorder and a speaker unit are attached to the arm portion of the vibration transmission member formed along the upper surface of the backrest, and these acoustic devices are integrated into the backrest. , the power supply lines for the drive unit and audio equipment can be integrated into one, so that the power supply line for the drive unit, audio equipment, etc. can be connected by simply plugging the power outlet of the power supply line into, for example, a cigarette lighter installed on the dash board of the vehicle. Power can be supplied and setting is easy. Further, the user can adjust the sensory level and the audio device while leaning against the backrest, that is, while experiencing the vibrations.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a drive unit used in the sensory acoustic device according to the present invention, and FIG.
Figure a is a block diagram showing an example of a circuit for driving the same drive unit as above, Figure 3 b is a graph showing the relationship between bodily sensation and the amount of vibration, and Figure 4 a shows this device installed in the backrest of the chair body. A plan view showing an example of the installed state,
Figure b is a rear view of the same, and figure c is a sectional view of the same side. 1... Drive unit, 2... Backrest of chair body, 3
...Frame (pipe frame), 4...Mounting pipe,
5...Headrest, 6...Legs, 8...Vibration transmission member,
8a... Arm part, 8c... Mounting hole, 9, 10... Sound device (control part, tape recorder), 11
...Speaker unit.

Claims (1)

[Scope of utility model registration request] A vibration transmission device having an arm portion removably attached to the legs of a headrest having legs that are fitted into a frame formed on a backrest portion of a chair body, and formed along the upper surface of the backrest portion. a drive unit attached to the vibration transmission member and driven by an acoustic electric signal; a control unit for the drive unit or an audio device such as a tape recorder attached to the arm of the vibration transmission member; A sensory acoustic device comprising speaker units attached to both sides of a headrest of an arm.