JP3153101B2 - In-vehicle speaker system and seal structure of enclosure wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle speaker system and a seal structure of an enclosure wall, and more particularly to a vehicle having no rear upper back such as a lift-back vehicle and a wagon vehicle. The present invention relates to a speaker system to be mounted and a seal structure of an enclosure wall.

[0002]

2. Description of the Related Art In the case of a vehicle that does not have a rear upper bag, such as a lift-back vehicle or a wagon vehicle, a woofer unit is installed in the vehicle interior due to space limitations. Difficult. For this reason, the speaker system mounted on the vehicle does not usually have a woofer unit, but some have a duct type or box type woofer unit. .

However, in that case, there is a problem that space for storing luggage must be sacrificed in order to install the woofer unit. In order to sufficiently exhibit the acoustic performance as a woofer, a large aperture (φ20
It is desirable to install a unit (not less than 12 cm in diameter), but in view of space, the woofer unit that can be installed in the vehicle is a relatively small unit (φ12 to φ16 cm). There is a problem that sound performance cannot be sufficiently exhibited.

[0004] The present invention has been made in view of the above problems, and without sacrificing much space for storing luggage,
An object of the present invention is to provide a vehicle-mounted speaker system and a seal structure of an enclosure wall which can sufficiently exhibit acoustic performance as a woofer.

[0005]

In order to achieve the above object, an on-vehicle speaker system (1) according to the present invention comprises a rear speaker system.
A trunk room provided in the rear of the seat and existing in the vehicle interior , and a tonneau cover for blindfolding the trunk room
And provided on the left and right sides immediately after the backrest of the rear seat.
A plurality of holes for attaching a winding opening of the tonneau cover.
In a vehicle that includes a book Riasamatawa, as the baffle surface is opposed at the rear seat backrest and spacing, enclosure between them Riasamatawa is arranged detachably, openings formed on the back of the enclosure A woofer unit is attached to the baffle surface.

Further, in the vehicle speaker system (2) according to the present invention, in the vehicle speaker system (1), the woofer unit is a double voice coil speaker.
It is characterized by being composed of mosquitoes.

[0007] The vehicle-mounted speaker system (3) according to the present invention is provided behind the rear seat and is located in the vehicle interior.
A trunk room of a tonneau cover for blindfold the trunk room, the rear seat backrest just how
It is provided on both left and right sides, and takes up the winding part of the tonneau cover.
In a vehicle equipped with a plurality of rear summer towers for attaching, an enclosure is detachably arranged between the rear summer towers such that a baffle surface faces the rear seat backrest at an interval , and a rear surface of the enclosure is provided on a rear surface of the enclosure. An opening is formed, a full-range speaker is arranged near both upper ends of the baffle surface, and a woofer unit constituted by a double voice coil speaker is arranged substantially in the center of the baffle surface. .

The seal structure of the enclosure wall according to the present invention is the vehicle-mounted speaker system according to any one of the above (1) to (3), wherein the winding portion of the tonneau cover and the enclosure are provided. An elastic member made of rubber sponge or the like is interposed between the upper surface of the jar and the upper surface of the jar;

[0009]

[Action]

In-vehicle speaker system (1) In a trunk room of a vehicle such as a lift-back vehicle or a wagon vehicle, the space immediately after the rear seat backrest generally has a space as shown in FIG. The trim on both sides protrudes inward and becomes narrower. In the case of the in-vehicle speaker system (1), the enclosure is disposed in this narrow space. Therefore, it is possible to dispose the enclosure without sacrificing much the luggage accommodation space of the trunk room. In addition, since the enclosure is detachably provided, if storage of luggage must be prioritized, the enclosure can be removed to make full use of the storage space of the trunk room. It is.

Further, since the enclosure is provided in the narrowed space so that the baffle surface faces the rear seat backrest at a predetermined interval, the enclosure is provided.
The height of the jar can be set to any height up to the height of the rear seat backrest, and the baffle surface can be made large. This makes it possible to use a wafer unit having a large diameter (φ20 to φ30 cm) on the baffle surface. Therefore, small diameter (φ12 ~
Compared with a conventional in-vehicle speaker system having a woofer unit of φ16 cm), the acoustic performance as a woofer can be improved, and a in-vehicle speaker system having a high acoustic effect can be configured. .

Further, since an opening is formed on the back surface of the enclosure, as shown in FIGS. 1B and 1C, not only the enclosure itself but also a trunk room is provided. Can be used as a second enclosure. This makes it possible to further enhance the sound effect.

In-vehicle speaker system (2) Generally, when a woofer unit is added to an in-vehicle 4-speaker system, an RL (rear left) signal and an RR signal are used.
A (rear light) signal is input to a large output amplifier to produce an L + R monaural signal, and then the woofer unit is driven by the large output amplifier. Therefore, in this case, it is necessary to increase the number of the woofer units and also the number of the high-output amplifiers. In addition, the installation location of the high-output amplifier becomes a problem, and the wiring method of signal lines and power supply lines for the high-output amplifier also becomes a problem.

On the other hand, in the case of the in-vehicle speaker system (2), since the woofer unit is constituted by a double voice coil speaker, the RL signal and the RR signal are transmitted to the double voice coil speaker. L +
Additional woofer units can be installed without an R mix circuit or dedicated amplifier. Therefore, there is no need to install the large output amplifier, and there is almost no increase in cost. Further, there is no problem in the installation place of the high-output amplifier and the wiring method of the signal line and the power supply line for the high-output amplifier.

On-vehicle speaker system (3) The on-vehicle speaker system (3) is composed of a FL (front left) and FR (front right) speaker. Gradation from 2 speaker system to 4 speaker system with woofer unit
This is an invention relating to a case where the device is brought up.

When a wagon car and a lift-back car with a two-speaker system are graded up to be a four-speaker system vehicle, a mounting place is secured on the vehicle body in advance so as to be compatible with the four-speaker system. Unless this is done, it is difficult to secure a mounting place for the rear speaker, and the mounting work also requires trimming and the like, which is extremely troublesome. On the contrary,
In the case of the vehicle-mounted speaker system (3) according to the above configuration,
A woofer unit is disposed substantially at the center of the baffle surface, and an enclosure in which a full-range speaker as a rear speaker is disposed near both upper ends of the baffle surface. It is possible to easily upgrade vehicles such as a two-speaker wagon and a lift-back vehicle to a four-speaker system equipped with a woofer unit. is there. Also, since the woofer unit is constituted by a double voice coil speaker, it is necessary to add a large output amplifier for driving the woofer unit, as described in the above-mentioned in-vehicle speaker system (2). RL signal and R
It is only necessary to input (connect) the R signal to the double voice coil speaker as the woofer unit.

[0016] In the seal structure of the enclosure wall according to the above configuration, the vehicle-mounted speaker system according to any one of (1) to (3) above. In the method, an elastic member such as a rubber sponge is compressed and interposed between the upper surface of the enclosure and the tonneau winding portion. Thereby, a seal is provided between the enclosure and the tonneau winding section.
It is possible to prevent air leakage from the trunk room as the second enclosure into the vehicle interior, and it is possible to enhance the acoustic effect of the woofer unit. Further, the enclosure is pressed down from above and fixed by the elastic member made of the rubber sponge or the like, and unnecessary resonance of the enclosure itself is suppressed.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a speaker system for a vehicle and a seal structure of an enclosure wall according to the present invention. Embodiment 1 FIG. 1A is a horizontal sectional view schematically showing a rear portion of a vehicle equipped with an in-vehicle speaker system according to Embodiment 1, in which 10 denotes a vehicle, and 14 denotes a rear chassis. -Indicates a backrest. Rear shell in trunk room 11
The rear portion of the backrest 14 is narrowed with the trim 12 on both side walls protruding inward due to the rear sama tower 13. In the case of the vehicle-mounted speaker system according to the first embodiment,
A trapezoidal enclosure 15 with a cross-sectional view in which the woofer unit 20 is mounted is disposed in the narrowed space 11a (see FIG. 1B).

FIG. 1B shows a vehicle-mounted speaker according to the first embodiment.
FIG. 2 is a side sectional view schematically showing a periphery of a woofer unit 20 constituting the power system. A woofer unit 20 is mounted on a baffle surface 15b of an enclosure 15 provided in the narrowed space 11a, and the baffle surface 15b faces the rear surface of the rear seat backrest 14 at an interval d. I have. Also, the back 15 of the enclosure 15
An opening 15a is formed below c. Back 1
Since the opening 15a is formed in 5c, the trunk room 11 is used as a second enclosure.

FIG. 1C is a horizontal sectional view schematically showing the structure of the enclosure for the woofer unit 20 as viewed from the acoustic side. In the figure, V ₁ is enclosures - indicates the volume of Ja 15, 50 to 100 liters of volume. V ₂
Indicates the volume of the second enclosure (trunk room 11), which is 250 to 350 liters. Here, the bottom of the second enclosure has a trunk room 1.
1 with a bottom (carpet) and side trims 12
This is a simplified type of enclosure having an upper surface provided with a tonneau cover (see FIG. 3) for blindfolding the trunk room 11.

FIG. 2 is a perspective view schematically showing the enclosure 15. FIG. 2 (a) is a perspective view seen from the baffle surface 15b side, and FIG. 2 (b) is a perspective view seen from the back surface 15c side. FIG. The enclosure 15 is made of a strong material such as wood (plywood) which does not resonate (the enclosure 15 itself does not vibrate), and is formed in a trapezoidal shape in a sectional view so as to fit into the narrowed space 11a. . Hereinafter, an example of the dimensions of the enclosure 15 will be described.

The width W of the back surface 15c: 900 mm, the height H of the enclosure 15: 490 mm, the depth D _{1 of the} upper surface 15 d: 100 mm, the depth D _{2 of} the bottom surface: 250 mm,
Width W _S of the opening 15a: 850 mm, vertical width h of the opening 15a: 100 mm, c - the diameter of the fan unit 20 phi:
25 cm. The size of the opening 15a (= W _S × h)
The second enclosures - volume V ₂ of the value of the manager, are set in accordance with the reproduction characteristic of the bass and the like. Also, the depths D ₁ and D ₂
Is set as thin as possible.

Next, the seal structure of the enclosure wall will be described with reference to FIG. FIG. 3 is a side sectional view schematically showing a seal structure of the enclosure 15. As shown in FIG. In the figure, reference numeral 31 denotes a tonneau winding portion, and 32 denotes a tonneau cover.

The tonneau cover take-up section 31 is usually configured to be detachable, and the rear sustainer 13 of the trim 12 is provided.
It is used by fitting to both side parts. Therefore, the tonneau winding portion 31 is located just above the enclosure 15 as shown in FIG. In the seal structure of the enclosure constituting the in-vehicle speaker system according to the first embodiment, a rubber sponge member 33 is provided between the upper surface 15d of the enclosure 15 and the tonneau winding portion 31. Interposed. The rubber sponge member 33 preferably has a high elasticity and an independent firing structure in order to shield the space. A rubber sponge member 33 having a thickness about twice as large as the gap L between the enclosure 15 and the tonneau winding portion 31 is preferred. It is compressed to half and installed. The rubber sponge member 33 is provided on the upper surface 15d of the enclosure 15 or the tonneau winding portion 3.
It is stuck to the bottom of 1 in a strip shape.

Next, a vehicle-mounted speaker system according to the first embodiment and a method of connecting the same will be described with reference to FIG. FIG.
FIG. 4A is a block diagram schematically showing a vehicle-mounted speaker system according to the first embodiment and a connection method thereof.
(B) is a block diagram schematically showing a conventional on-vehicle speaker system and its connection method. In the figure, 41 is 4
This shows a set amplifier including amplifiers 41a to 41d for channels, and the amplifier 41a is a front left
Spin - is connected to a pressurized 42 _FL, amplifier 41b is the front light-spin - is connected to a pressurized 42 _FR, amplifier 41c is Rear-Left-spin - is connected to a pressurized 42 _RL, the amplifier 41d is the rear write spin - to mosquitoes 42 _RR It is connected.

As shown in FIG. 4B, when a woofer unit is added to the conventional four-speaker system for a vehicle, the woofer unit 51 and the woofer unit 51 are added.
It is also necessary to add a large output amplifier 50 for driving the power amplifier. On the other hand, in the case of the vehicle-mounted speaker system according to the first embodiment, as shown in FIG.
And an RL (rear left) signal is input via a network coil 44c, and a connector 43d is connected to the other coil.
And an RR (rear light) signal is input via the network coil 44d. The double voice coil speaker has a configuration in which two systems of voice coils are wound around a bobbin in the same gap. When stereo signals of L and R are applied to each voice coil, an apparent monaural (L + R) signal is obtained. Since the operation is equivalent to that in the case of the addition, the vehicle-mounted speaker system according to the first embodiment does not require the (L + R) electric mix circuit (= no need to add the high-output amplifier 50), The woofer unit can be added to the 4-speaker system only by adding the double voice coil speakers 20.

However, simply, the double voice coil speaker 20 as a woofer unit is simply connected to the rear left
When the speaker 42 _RL and the rear light speaker 42 _RR are connected in parallel with the full-range speaker, the impedance is reduced and the load on the set amplifier 41 is increased. Therefore,
In the case of the in-vehicle speaker system according to the first embodiment, the lowest resonance frequency f ₀ of the woofer unit (= double voice coil speaker) 20 is set to be lower than the lowest resonance frequency f ₀ ′ of a general full-range speaker. Low, and furthermore, unnecessary middle and high frequency bands are cut by the woofer unit 20 itself,
The impedance is increased over the apparent middle band by also cutting by the network coils 44c and 44d, and the impedance of the full-range speaker (generally, the impedance of the full-range speaker for vehicle is 4Ω to 6Ω). Even when they are connected in parallel, the combined impedance does not fall below 2Ω.

In recent years, almost all power ICs used in vehicle-mounted speaker systems are guaranteed to operate up to a load of 2Ω.
There is no problem even if the dance falls below 4Ω. FIG. 5 is a graph showing the relationship between the frequency and the combined impedance.
In FIG. 5, a thick solid line graph A shows an impedance curve of the woofer unit 20, and a thin solid line graph B
Indicates the impedance curve of the full-range speaker, and the two-dot chain line graph C indicates the synthetic impedance.
The inductance L of the network coils 44c and 44d is L = 4.7 mH, and the cutoff frequency fc is 135 Hz.

As described above, in the vehicle-mounted speaker system according to the first embodiment, the baffle surface 15b of the enclosure 15 has a large-diameter (φ20 to φ30 cm) woofer.
Fa unit 20 can be attached,
By providing the opening 15a on the back surface 15c of the jar 15, the trunk room 11 can be used as the second enclosure, so that bass reproduction characteristics (acoustic performance) can be improved. Further, since the enclosure 15 is detachable, if it is necessary to prioritize the storage of the luggage, the enclosure 15 can be removed and the trunk room 11 can be fully used.

A rubber sponge member 3 is provided between the upper surface 15d of the enclosure 15 and the tonneau winding portion 31.
3 is interposed, the gap between the tonneau cover winding portion 31 of the enclosure 15 can be sealed, and the acoustic effect of the woofer unit 20 can be enhanced. -The jaw 15 can be pressed down and fixed from above, and unnecessary resonance of the enclosure 15 itself can be suppressed.

In the vehicle speaker system according to the first embodiment, since the double voice coil speaker 20 is used as the woofer unit 20, a large-sized loudspeaker for driving the woofer unit 20 is used. There is no need to add the output amplifier 50 (see FIG. 4B), and the woofer unit 20 can be easily added to the 4-speaker system.

Next, a vehicle-mounted speaker system according to a second embodiment will be described with reference to FIGS. Embodiment 2 FIG. 6 (a) is a side sectional view schematically showing a main part of an in-vehicle speaker system according to Embodiment 2, in which 65 indicates a trapezoidal enclosure in side view. ing. The baffle surface 65b of the enclosure 65 faces the rear seat backrest 14 at a predetermined distance d, and an opening 65a is formed at the lower portion of the back surface 65c.
A rubber sponge member 33 is interposed between the winding unit 31 and the winding unit 31. As shown in FIG. 6B, the woofer unit 20 is mounted substantially at the center of the baffle surface 65b. -K6
1, 62 are attached diagonally forward and upward. As a result, the full-range speaker 6 is moved from the space between the tonneau cover take-up portion 31 and the rear seat backrest 14 toward the vehicle interior.
1, 62 are reproduced. As can be seen from the above description, the on-vehicle speaker system according to the second embodiment is different from a two-speaker system including an FL speaker and an FR speaker, to a four-speaker system including a woofer unit. FIG. In addition,
FIG. 6B is a schematic front view of the enclosure 65 as viewed from the baffle surface 65b.

FIG. 7 is a connection diagram showing a connection relationship in the enclosure 65. As in the case of the enclosure 15 described in the first embodiment, the woofer unit 20 is constituted by a double voice coil speaker, and one voice coil receives an RL signal via a network coil 44c. The RR signal is input to the other voice coil via the network coil 44d. Also, a full-range speaker 6 as an RL speaker
The 2, Inpi at a low-frequency as well as cutting the low range - so that the RL signal is input via a capacitor C ₆₂ to increase the dance. Similarly, a capacitor C ₆₁ is connected to the full-range speaker 61 as the RR speaker.
The RR signal is input via the.

Since the large woofer unit 20 is mounted in the vicinity, full-range speakers 61 and 62 are provided.
Is used as a skaker or tweeter that does not require much low frequencies and reproduces mainly in the middle to high frequencies. FIG. 8 shows the woofer unit 20 and the full-range speakers 61 and 62.
FIG. In the figure, the graph indicated by D indicates the frequency characteristic of the woofer unit 20, and the graph indicated by E indicates the frequency characteristic of the full-range speaker 61 (62). The network coil 44c (44
The inductance L of d) is 4.7 mH, and the capacitance value of the capacitor C _{61 (62)} is 220 μF.

As described above, in the in-vehicle speaker system according to the second embodiment, the large woofer unit 20 and the full-range speakers 61 and 62 as rear speakers are provided in the enclosure 65. Is arranged,
Only by placing the enclosure 65 in the narrow space 11a in the trunk room 11, the FL speaker and the FR
A two-speaker system comprising speakers can be easily upgraded to a four-speaker system having a woofer unit.

[0035]

【The invention's effect】

In-vehicle speaker system (1) A large-diameter woofer unit can be attached to the baffle surface of the enclosure, compared with a conventional vehicle-mounted speaker system having a small-diameter woofer unit. Thus, the sound effect of the woofer can be enhanced. In addition, since the opening is formed in the lower portion of the back surface of the enclosure, the trunk room can be used as the second enclosure, and the acoustic effect of the woofer can be further enhanced. . Further, since the enclosure is configured to be detachable, when it is necessary to prioritize storage of luggage, the enclosure can be removed to fully use the trunk room.

In-vehicle speaker system (2) In addition to the effects of the in-vehicle speaker system (1), the woofer unit is constituted by a double voice coil speaker. There is no need to add a large-output amplifier having an L + R mix circuit for driving the woofer unit, and only the RL signal and the RR signal are input to the double voice coil speaker to achieve four speakers.
The woofer unit can be easily added to the power system.

In-vehicle speaker system (3) Since a large-diameter woofer unit and a full-range speaker as a rear speaker are provided in the enclosure, the rear speaker is arranged. The loudspeaker system can be easily upgraded from a two-speaker system to a four-speaker system equipped with a woofer unit by merely arranging the enclosure without the need for complicated work. can do.

Sealing Structure of Enclosure Wall The elastic member such as the rubber sponge can seal the space between the enclosure and the tonneau winding portion, and can be used as a second enclosure. Air leakage from the trunk room to the vehicle interior can be prevented, and the acoustic effect of the woofer can be enhanced. In addition, the enclosure can be pressed down from above by an elastic member such as the rubber sponge and fixed, and unnecessary resonance of the enclosure itself can be suppressed.

[Brief description of the drawings]

1A is a horizontal sectional view schematically showing a rear portion of a vehicle on which a vehicle-mounted speaker system according to a first embodiment of the present invention is mounted, and FIG. FIG. 1 is a side sectional view schematically showing a main part of an on-vehicle speaker system according to (1), and FIG. 1 (c) is a schematic horizontal sectional view acoustically showing an enclosure for a woofer unit.

FIG. 2 is a perspective view schematically showing an enclosure to which a woofer unit constituting the vehicle-mounted speaker system according to the first embodiment is attached, and FIG. 2 (a) is viewed from a baffle surface; It is a perspective view, and figure (b) is the perspective view seen from the back.

FIG. 3 is a side sectional view schematically showing a seal structure of an enclosure wall according to the first embodiment.

FIG. 4A is a connection diagram showing a connection relationship of a vehicle-mounted speaker system according to the first embodiment, and FIG. 4B is a connection diagram of a conventional vehicle-mounted speaker system. It is a connection diagram.

FIG. 5 is a graph showing the impedance characteristics of the woofer unit, the impedance characteristics of the full-range speaker, and the combined impedance characteristics of the loudspeakers constituting the in-vehicle speaker system according to the first embodiment. is there.

6 (a) is a side sectional view schematically showing a main part of a vehicle-mounted speaker system according to Embodiment 2 of the present invention, and FIG. 6 (b) is a diagram showing an enclosure from a baffle surface. It is the schematic front view which showed the place to look.

FIG. 7 is a connection diagram showing an internal connection relationship of an enclosure constituting the vehicle-mounted speaker system according to the second embodiment.

FIG. 8 is a graph showing frequency characteristics of a woofer unit and a full-range speaker constituting the vehicle-mounted speaker system according to the second embodiment.

[Explanation of symbols]

Reference Signs List 10 vehicle 11 trunk room (second enclosure) 11a narrowed space 14 rear seat backrest 15, 65 enclosure 15a, 65a opening 15b 65b baffle surface 15c 65c back surface 15d 65d top surface 20 woofer unit (Double voice coil speed
F) 31 Tonokaba - winding unit 32 Tonokaba - 33 rubber sponge 61,62 Fururenjisupi - mosquito (Riasupi - f) d predetermined interval V ₁ (enclosures - Ja itself) acoustical volume V ₂ (second enclosures - Ja Acoustic capacity

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 2-55795 (JP, U) JP-A 56-163392 (JP, U) JP-A 57-119994 (JP, U) JP-A 57- 121393 (JP, U) Fully open sho 55-170148 (JP, U) Fully open sho 64-13890 (JP, U) Fully open flat 1-156682 (JP, U) Fully open sho 63-149690 (JP, U) Japanese Utility Model Showa 62-203589 (JP, U) Japanese Utility Model 63-40947 (JP, Y2) Japanese Utility Model 2-16917 (JP, Y2) Japanese Utility Model 61-28469 (JP, Y2) Japanese Utility Model 58-46609 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 11/02 H04R 1/02 102

Claims (4)

(57) [Claims] (1) The vehicle is provided behind a rear seat and is provided in a vehicle interior.
Existing trunk room , a tonneau cover for blindfolding the trunk room , and immediately after the rear seat backrest
On the left and right sides of the
In a vehicle equipped with a plurality of rear summer towers for attachment, an enclosure is detachably arranged between the rear summer towers so that a baffle surface faces the rear seat backrest at an interval. An in-vehicle speaker system, wherein an opening is formed on the back surface of the enclosure, and a woofer unit is mounted on the baffle surface. 2. The in-vehicle speaker system according to claim 1, wherein said woofer unit comprises a double voice coil speaker. 3. The vehicle is provided behind a rear seat, and is provided in a vehicle interior.
Existing trunk room , a tonneau cover for blindfolding the trunk room , and immediately after the rear seat backrest
On the left and right sides of the
In a vehicle equipped with a plurality of rear summer towers for attachment, an enclosure is detachably arranged between the rear summer towers so that a baffle surface faces the rear seat backrest at an interval. An opening is formed in the back of the enclosure, a full-range speaker is arranged near both ends of the upper part of the baffle surface, and a woofer unit composed of a double voice coil speaker is arranged substantially in the center of the baffle surface. An in-vehicle speaker system, comprising: 4. An in-vehicle speaker system according to claim 1, wherein an elastic member such as a rubber sponge is interposed between a winding portion of the tonneau cover and an upper surface of the enclosure. An enclosure wall seal structure characterized by being mounted.