WO2001050817A1

WO2001050817A1 - Accumulator-powered mobile amplified enclosures

Info

Publication number: WO2001050817A1
Application number: PCT/FR2000/003597
Authority: WO
Inventors: Patrick Lobry
Original assignee: Patrick Lobry
Priority date: 1999-12-31
Filing date: 2000-12-19
Publication date: 2001-07-12
Also published as: FR2803480A1; AU2687101A; FR2803480B1

Abstract

The invention relates to a mobile amplified enclosure which is powered by an accumulator (a car battery). The invention also relates to a device for immediately supplying sound to locations which do not have an electrical system. Said enclosure (50) comprises an amplifier (11), two loud-speakers (13, 15), two wheels (6), a handle bar (4) and/or a pulling arrangement (31), an accumulator (22) and a mixing table (26). The inventive device is especially suitable for use for live shows and for providing the sound for various events.

Description

ENCEL YOUR MOBILE AMPLIFIED: BATTERY POWER

The present invention relates to a mobile amplified enclosure powered by an accumulator, equipped with a mixer.

Until now, there were only amplified or non-powered speakers, mobile or not but still dependent on a nearby power outlet. The speaker described below combines the advantages of conventional speakers (power and sound quality) with mobility and autonomy (battery power).

According to the invention, the enclosure comprises two wheels (6) and an accumulator (22) for storing energy, so that it is mobile and autonomous. Preferably, the wheels are fitted with tires so as to, on the one hand dampen the vibrations of sound origin, and on the other hand attenuate the transmission of shocks to the electrical components which it contains during its movement.

The accumulator is arranged in the lower part of the enclosure so as to improve the stability and the maneuverability of the enclosure.

The mass of the accumulator is at least five kg in order to reduce the vibrations of the enclosure.

The volume of the acoustic cavity (51) of the enclosure is greater than ten dm ³ and is preferably situated in a range going from thirty to one hundred and fifty dm ³ .

The walls include an outer skin (la) of plastic material, the inner face of which is coated with a layer (lb) of a damping material such as polyurethane foam so as to constitute a rigid and light structure and is preferably provided with reinforcements such as wooden cleats.

The enclosure further comprises a mixing table (26) making it possible to connect several sound sources at the input of the amplifier (11).

It also includes a stand and / or a stabilization structure in an inclined position. It includes a handlebar to steer it or a harness allowing a musician to play by dragging the speaker behind him.

It has two bulbs serving as impedance limiters for the speakers and

F amplifier, one of twenty watts for the treble medium ferro fluid horn and one of fifty watts for the bass speaker. The enclosure (50) is constituted for its main elements:

- a molded plastic container (la) covered with a layer of compressed polyurethane foam (lb), closed by a wooden cover (2) reinforced with rubber (3), equipped with a handlebar (4) with foam handles (5), two thirty cm diameter wheels (6) mounted on an aluminum-copper-steel axis (7) for mobility and for the stability of two fixed wheels thirteen cm in diameter at the front (8) d 'a protective shoe (9) and a crutch at the rear (10).

- an amplifier (11) (120 W permanent per channel, 360 W peak) with protection and ventilation grille (12), a special 30 cm bass speaker (13) (450 W, 4 Ohms) with protection grille (14), a ferro fluid treble medium horn (15), an acute medium attenuator with constant impedance (16), a 2-way passive filter (17), a fuse protection for the amplifier (18), two bulbs (19-20) acting as active hmitors for the protection of the speakers and the amplifier, two bass vents (21).

- a 50 Ah lead-acid battery (22), a main switch (23), a charger power socket (24), three cigarette lighter sockets (25). - a mixer (26)

The following can be added:

- CD holder (27)

- cable holder (28)

- quick fixing for microphone stand (29) (29a) - stabilizer system to present the speaker at 75 degrees thus offering a better listening arrangement (30)

- A harness making it possible to pull the enclosure while playing an instrument (31) Figures 1 to 13 illustrate the invention.

Figure 1 is a front view of the enclosure. Figure 2 is a rear view of the enclosure.

Figure 3 is a sectional side view of the enclosure.

Figure 4 is a front sectional view of the enclosure.

Figure 5 is a detail in section of the bottom of the enclosure.

Figure 6 is a top view in section of the enclosure. Figure 7 is the electrical diagram of the speaker connections.

Figures 8 and 9 are views of the enclosure from the front and back with the stabilizers.

Figure 10 is a detail of the stabilizer.

Figure 11 is a view of the enclosure pulled by the harness.

Figure 12 is a front view of the harness. Figure 13 is a view of the harness from above.

First, take the container (1201) (la), make a counter-mold (here, in this case, a plastic bag of 1001 filled with water) and inject the polyurethane foam into the interval until a layer of 2 cm thick (lb) is obtained.

(NB: the foam is injected at the same time as the bag is filled with water.) After drying, all the openings intended to receive the various constituent elements of the sound and electrical devices are cut with a grinder.

Front face :

The two main openings are aligned in the vertical axis.

Starting from the top, we make 3.5 cm from the edge of the container a first rectangular window 27 cm wide by 10 cm high (B) for the treble medium tube, then 20.5 cm from the same edge, a second circular cutout 32 cm in diameter (C) for the bass speaker and finally 66 cm from the top, two circular openings of 7 cm in diameter (D) arranged symmetrically on either side of the vertical axis and aligned one relative to the other, future bass vents. Back side:

5 cm from the top, offset to the left, a hole 1 cm in diameter (E) will give access to the attenuator adjustment potentiometer (16). Offset to the right, a circular hole 2 cm in diameter (F) will allow the socket of the bulb (19) to be inserted, which serves as an active lnitor for the acute medium tube (15).

Aligned in the vertical axis, 42 cm from the top, an opening of 20 cm by 20 cm (G) will receive the battery (22).

We then proceed to the first reinforcements.

Front / outside: First install a first wooden board (H) cut to the right dimensions (16 cm by 20 cm) to be embedded and glued into a groove in the container.

Interior front panel:

Then place inside a medium plate 40 cm by 40 cm by 1.5 cm, (I) pierced with a circle 30 cm in diameter which is fixed on the container sandwiched with the board (H ) by means of four bolts (J).

Then fix on the medium board (I) two vertical battens (K) then a horizontal (L) flush with the edge of the container.

Back / inside and outside:

We make a 20 cm by 20 cm by 20 cm box (M) which we place in the opening (G) and which we fix on the bottom of the container, the open side of the box facing outwards, it will be used for housing the battery, note that the upper face of the box is a little shorter so that once closed, a passage is left to the supply wires.

Leaning on the box inside the container, we place two vertical cleats (N) which go up to the edge of the container and their twins (O) on the outside, then we screw them taking the wall of the container sandwich.

This will be the support for the amplifier and the handlebars.

Two bevelled wooden wedges (P) are therefore fixed on said cleats (O) then, using metal tabs (Q), the aluminum bicycle handlebars (4) are clamped not without having protected it with a strip of handlebar tape to avoid scratches and possible play.

The axis (7) of the large wheels is placed in the holes provided for this purpose on the container.

To do this, a 10 mm diameter steel rod is slipped into a 13 mm copper tube itself covered with a rubber sheath, all placed in a 20 mm aluminum tube, this ensuring the solidity and elasticity of the whole. The length of the axle must be reduced to a minimum to avoid excessive wheelbase. The 30 cm diameter wheels (6) are fixed to the axle using pins. Locomotion is assured.

It is also necessary to install the small fixed wheels 13 cm in diameter (8); a 10 mm steel axle

(R) crosses the bottom of the container. The wheels are screwed onto the wooden board (H). So much for stability. The protective shoe (9) is constructed by screwing two bevelled wooden wedges (S) on the bottom of the container and covering them with a metal grid (T) in order to protect the wheel axle from possible shocks during of a displacement.

The vent device (21) is installed: two PVC tubes (U) with a vertical diameter of 10 cm each pierced with a circle connected to the opening made on the container by an 8 cm diameter tube made of thick cardboard ( V).

The loudspeakers are fixed by screwing them onto their respective supports (mid-range board (I) for the bass HP (13) and battens (K) for the high-mid horn (15)).

The amplifier (11) is placed on the vertical battens on the rear face (O), potentiometers at the top, accessible to the settings. It is protected with the grid (12) also fixed on the cleats (O).

The fifty W protective bulb (20) of the low speaker is fixed inside the container.

The attenuator (16) is also fixed inside the container. The battery (22) is placed in its housing (M), the housing is closed with a board on which the three cigarette lighter sockets are placed, thanks to which it is possible to recharge the battery by a car.

The two-way passive filter (17) is placed on top of the box (M).

The stand (10) is fixed under the housing (M). On the right side of the housing (M), put the main switch (23) and the charger connection socket (24).

Figure 7 describes the electrical diagram.

The device includes: a 50 Ah lead battery (101), a ferro fluid treble medium horn (102), a 30 cm bass speaker of 450 Watt, 4 Ohm (103), a 2-way passive filter (104), a constant impedance mid-range attenuator (105), a filament lamp of 20

Watts (106), 20 amp fuse (107), 120 watt permanent amplifier, 360

Watts peak, bridged (108), three cigarette lighter sockets (109), a 20 A amplifier power fuse (110), a main switch (111), a charger power socket (112) and a filament lamp 50 Watts (113). After ensuring the proper functioning of the circuit, place two last cleats (W) to complete the reinforcement of the container, cover them with a foam insulation plate and fix the wooden cover by screwing it securely on battens L and W.

We put the rubber reinforcement around the cover. The mixer (26) can be fixed to the cover by screws.

It allows to sound six musicians, for example.

The CD holder (27) is made up of a wooden plate covered with a foam U in which you can slide the CD player, all subject to a support fixed on the cover. The cable holder (28) is a set of six metal guides fixed to the right of the handlebars

(wedge P), it prevents cables from lying around during travel.

The quick mounting for microphone stand (29) is a clamp which encloses in its jaw a handle mounted on silent blocks, screwed on the cover. It receives the microphone stand in a housing provided for this purpose.

The stabilizer system (30) is made of two elements (30AA 'and 30BB'): each consisting of two aluminum tubes of different diameters (AA 'and BB') assembled by a hinge (30C), the two ends are provided clips (30D) to secure them to the handlebars (4) and the wheel axle (7). A first element on the left (30AA '), a second element on the right (30BB'), the two are joined by their bases by a strap (30E).

The harness (31) is constructed from a snare harness (31 A) on which two articulated arms (31BB'B "and 31CCC") are added. Each arm is made of three pieces of wood: the first (31B or 31C), the one that will be attached to the original harness, is a slat with a cross section. It comes to fit into a notch made in the second part (31B 'or 31C) which is a plaice. A bolt held by a nut (31D) crosses the two parts (31B and 31B 'or 31C and 31C) leaving them a certain flexibility in the lateral axis. The third, another slat (31B "and 31C"), is connected to the second by an elastic strap (31G) securely screwed onto the plaice (31B 'or 31C) and at two points on the slat (31B "or 31C" ) so as to end the arm with a handle (31E).

The arms are screwed onto the harness by screws (31F).

The handles (31E and 31E ') are intended to receive the arms of the handlebar (4) of the enclosure.

The elastic strap / wood assembly provides traction that is both flexible and stable.

The device according to the invention is particularly intended for the immediate sound system of live shows and various events in places without an electrical installation.

Claims

REVENDICAΗONS

1 - Amplified enclosure (50) comprising two loudspeakers (13, 15), an amplifier (11) and a mixer (26) making it possible to connect several sound sources at the input of the amplifier (11), characterized in that 'It has two wheels (6), an accumulator (22) for storing energy, so that it is mobile and autonomous.

2 - enclosure according to claim 1 wherein the wheels (6) are equipped with tires so as to, on the one hand dampen the vibrations of sound origin, and on the other hand attenuate the transmission of shocks to the electrical components which it contains when moving. 3 - Enclosure according to claim 1 or 2 wherein the accumulator is disposed in the lower part of the enclosure so as to improve the stability and maneuverability of the enclosure.

4 - enclosure according to any one of claims 1 to 3 wherein the mass of the accumulator is at least equal to five kg so as to reduce the vibrations of the enclosure. 5 - enclosure according to any one of claims 1 to 4 wherein the volume of the acoustic cavity (51) of the enclosure is greater than ten dm ³ and is preferably located in a range from thirty to one hundred fifty dm ³ .

6 - enclosure according to any one of claims 1 to 5, the walls of which comprise an outer skin (la) of plastic material, the inner face of which is coated with a layer (lb) of a damping material such as polyurethane foam. so as to constitute a rigid and light structure and is preferably provided with reinforcements such as wooden battens.

7 - enclosure according to any one of claims 1 to 6 which comprises a quick attachment for microphone stand (29). 8 - Enclosure according to any one of claims 1 to 7 which further comprises a stand and / or a stabilization structure in the inclined position.

9 - Enclosure according to any one of claims 1 to 8 which includes a handlebar to direct it or a harness allowing a musician to foil by dragging the enclosure behind him. 10 - Enclosure according to any one of claims 1 to 9 which comprises two bulbs serving as impedance meters for the speakers and the amplifier, one of twenty watts for the treble medium tube ferro fluid and one of fifty watts for the bass speaker.