JP4560792B2 - Speaker device - Google Patents

Description

  The present invention relates to a speaker device, and more particularly to a speaker device suitable for outdoor use.

A speaker device that is used outdoors for disaster prevention or for loudspeaking in outdoor facilities needs to have a waterproof structure such as so-called drip-proof and rain-proof.
Such a speaker device includes a speaker unit and a cabinet to which the speaker unit is attached. As an example of the waterproof structure, a combination of cabinets is used to prevent water from entering the cabinet. There is a structure in which a silicon material or a rubber material is sandwiched between the portions as a seal member.
Although this structure can provide a high level of waterproof performance, the number of parts and the number of assembling steps are increased, and it is necessary to inspect whether a predetermined waterproof performance is obtained.

On the other hand, as another example of the waterproof structure, a speaker device having a structure that allows water to enter the cabinet to some extent is also known.
Since this speaker device does not particularly use a seal member, the number of parts and assembly man-hours are not increased, and the waterproof performance is not required to be inspected. Therefore, it is necessary to devise the arrangement of parts and the shape of the cabinet to prevent the water from coming into contact with each other, and further, a discharge structure for effectively discharging the water that has entered the inside to the outside.
As this discharge structure, it is common to provide a drain hole on the bottom of the cabinet. As an example of a speaker device having this drain hole, there is a door phone described in Patent Document 1.
No. 7-17182

As described above, in the conventional speaker device described in Patent Document 1, the water drain hole is formed to open to the bottom surface of the cabinet so that the water that has entered inside is discharged by its own weight. It was.
Normally, when installing a speaker device outdoors, it is almost always installed above a nearby person. In that case, the bottom of the cabinet is in the visible range, and the drain hole that opens to the bottom is The appearance quality of the speaker device was lowered.
In addition, since the opening of the drain hole is directly open to the outside, there is a possibility that bugs may enter the inside through this hole to form a nest, thereby closing the hole and reducing the drainage performance. was there.
In addition, water droplets adhering to the side walls or the like inside the cabinet gradually gather and reach the bottom surface, and even after a lapse of time, there is a case where the discharge continues and a problem occurs.
In other words, even after a certain amount of time has passed since the rain stopped, the collected water drops gradually dropped from the drain hole and wet the clothes on the person walking under the speaker device. May occur.

Therefore, the problem to be solved by the present invention is that even if a drain hole for discharging water that has entered the inside of the cabinet is provided, the appearance performance is not deteriorated, and the drainage performance is reduced by the entry of insects. There is no need to provide a speaker device.
It is another object of the present invention to provide a speaker device in which water drops do not drip after rain stops.

In order to solve the above problems, the present invention has the following configurations [1] to [3] as means.
[1] In a speaker device comprising a speaker unit, a baffle board to which the speaker unit is attached, a cabinet having side portions connected to the speaker unit, and a net attached to the cabinet so as to cover the speaker unit. ,
The edge of the net is fitted to the baffle board,
The baffle board is a speaker device having an opening for communicating the inside and the outside of the cabinet at a position corresponding to an edge of the net.
[2] The speaker device according to [1], wherein the cabinet has a water pool portion formed by denting the baffle board side outward in an inner wall surface corresponding to the opening of the side portion. It is.
[3] A speaker device comprising: a speaker unit; a baffle board to which the speaker unit is attached; a cabinet having a side portion connected to the baffle board; and a net attached to the cabinet so as to cover the speaker unit. ,
The baffle board has an opening that communicates the inside and outside of the cabinet at a position corresponding to the edge of the net;
The said cabinet is a speaker apparatus characterized by having the water pool part formed by denting the said baffle board side to the outer side in the inner wall surface corresponding to the said opening part of the said side part.

ADVANTAGE OF THE INVENTION According to this invention, even if it has the drain hole which discharges the water which permeated the inside of a cabinet, there exists an effect that a drainage performance does not fall by the approach of an insect, without the appearance performance falling.
In addition, there is an effect that water drops do not sag after the end of rain.

The preferred embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a front view showing an embodiment of the speaker device of the present invention.
FIG. 2 is a top view showing an embodiment of the speaker device of the present invention.
FIG. 3 is a right side view showing an embodiment of the speaker device of the present invention.
FIG. 4 is a rear view showing an embodiment of the speaker device of the present invention.
FIG. 5 is an assembly diagram of an embodiment of the speaker device of the present invention.
FIG. 6 is a cross-sectional view of an embodiment of the speaker device of the present invention.
FIG. 7 is an enlarged cross-sectional view of a main part in the embodiment of the speaker device of the present invention.
FIG. 8 is a front view of the main part in the embodiment of the speaker device of the present invention.

  First, the external appearance of the speaker device 50 according to the embodiment will be described with reference to FIGS. 1 is a front view thereof, FIG. 2 is a top view thereof, FIG. 3 is a right side view thereof, and FIG. 4 is a rear view thereof.

The speaker device 50 includes a cabinet 3 formed by combining a baffle board 1 and a substantially box-shaped back cabinet 2 having one side having a side portion and a bottom portion, which are opened on one side, in a combination portion P, and has a sealed structure. It is.
A woofer speaker unit (hereinafter also simply referred to as a woofer) 4 and a horn type tweeter speaker unit (hereinafter also simply referred to as a tweeter) 5 are attached to the baffle board 1.
A net 6 for protecting the woofer 4, the tweeter 5, etc. is fixed by screws 7a on the front side of the baffle board 1, that is, on the radiating direction side of the sound of the woofer 4, the tweeter 5.

  The net 6 is formed of a so-called punching metal (for example, having an opening hole with a diameter of 2φ, a pitch of 2.5, and a 60 ° staggered arrangement), and a frame provided on the front surface of the baffle board 1 so as to protrude from the periphery thereof. It is fixed so as to be fitted inside the portion 1a.

Brackets 8 can be attached to the left and right side portions 2 a of the back cabinet 2.
Specifically, the bracket 8 has a base portion 8a and a pair of arm portions 8b formed by bending both end portions thereof in the same direction, and the side of the back cabinet 2 on the distal end side of the arm portion 8b. It is attached so as to be rotatable around an axis C in the portion 2a.
Further, the bracket 8 can be rotated at an arbitrary angle by a fixing mechanism (not shown). That is, the cabinet 3 can be fixed at an arbitrary position within a range of about 90 degrees indicated by an arrow from the position A indicated by a solid line in FIG. 3 to the position B indicated by a one-dot chain line.

The base 8a of the bracket 8 is provided with a plurality of mounting holes 8a1, and the speaker device 50 can be fixed to a desired mounting location such as a wall surface or a ceiling by using screws or the like.
Therefore, when the angle of the bracket 8 is set to a desired angle at the time of installation, the sound can be emitted from the ceiling or the wall surface in a desired direction.

  In addition, the speaker device 50 according to the embodiment has a longitudinal direction that is horizontal (horizontal placement) when the speaker device 50 is attached to the ceiling, and a vertical direction (vertical placement) when attached to the wall surface. is there.

  On the other hand, a signal line 9 for supplying a signal from the outside to the woofer 4 and the tweeter 5 is drawn out from the rear surface 2 b of the back cabinet 2.

  Next, a main internal configuration of the speaker device 50 will be described with reference to FIG. 5 which is an assembly diagram and FIG. 6 which is a cross-sectional view taken along the line SS in FIG. In these drawings, the bracket 8 and its fixing mechanism and rotating mechanism are omitted.

In the baffle board 1, a woofer mounting hole 1 b for mounting the woofer 4 and a horn portion 1 c of the tweeter 5 are formed.
Around the baffle board 1, a frame portion 1 a that protrudes with respect to the baffle surface 1 e is provided.

On the other hand, the woofer 4 has a flange 4a on the front side thereof.
The woofer 4 is inserted into the woofer mounting hole 1b, and the rear surface side of the flange 4a is brought into contact with a woofer mounting recess 1e1 formed to be concave with respect to the baffle surface 1a around the woofer mounting hole 1b. Thus, it fixes to the baffle board 1 with the four screws 7b.
A tweeter driver 5a and the like are attached to the rear side of the horn 1c to constitute the tweeter 5.

A circuit unit 10 such as a substrate 10a and a transformer 10b for driving each speaker unit is attached inside the back cabinet 2, and predetermined wiring is provided between the speaker units 4 and 5.
A terminal portion 11 is attached to the rear surface portion 2b of the back cabinet 2, and the signal line 9 and the circuit portion 10 are electrically connected.

The net 6 attached to the front surface of the baffle board 1 includes a main surface portion 6a and a rising portion 6b that is bent in the same direction at approximately 90 ° with respect to the main surface portion 6a on each side except for the four corners. . The main surface portion 6a is formed in an arbitrary shape according to the appearance design. In the embodiment, the shape is a gently curved surface.
This net 6 protects the above-mentioned inner speakers 4 and 5 and, in addition, improves the appearance quality by making the inside difficult to see, and improves the aesthetics of the design conceived by making it the desired shape and color. And the main purpose.
Further, when the net 6 is attached to the inside of the frame portion 1a of the baffle board 1, the outer surface of the rising portion 6b and the inner wall surface 1a1 of the frame portion 1a of the baffle board 1 are slightly fitted. The dimensions are set so as to have a fitting with no gap.

Such a net 6 is fitted inside the frame portion 1a of the baffle board 1 and is fixed by four screws 7a. At that time, a spacer 12 such as a nonwoven fabric that more effectively prevents chatter noise due to vibration may be sandwiched between the outer surface of the rising portion 6b and the inner wall surface 1a1 of the frame portion 1a.
In the combination part P of the baffle board 1 and the back cabinet 2, as shown in FIG. 6, in the end face shape on one side (back cabinet 2 side in the embodiment), the center part is convex, and the end face shape on the other side. The shape in which the concave portion into which the convex shape is fitted is provided in the central portion.
Thereby, high rigidity is acquired as the cabinet 3 whole, and the sealing performance in the combination part P increases more.

On the other hand, a splash prevention filter 13 is interposed between the main surface portion 6 a of the net 6 and the baffle surface 1 e of the baffle board 1.
The splash prevention filter 13 is formed of a sponge-like material. As a result, the inside of the baffle board 1 cannot be seen from the outside, and the effect of improving the appearance quality is obtained, and the sound from the speakers 4 and 5 on the inside is transmitted to the outside and emitted from the outside. When a certain water droplet is applied, the momentum can be reduced to prevent intrusion into the inside.

Next, the drain hole 1g provided in the baffle board 1 will be described in detail with reference to FIG.
This drain hole is an opening for discharging water accumulated inside the cabinet 3 to the outside, and is not limited to a round hole as long as it communicates the inside and outside of the cabinet 3, A slit shape may be used, and the opening shape is not limited.
In this embodiment, a round drainage hole will be described as an example.

In the baffle board 1, a groove portion 1f that is recessed from the baffle surface 1e is formed between the baffle surface 1e and the frame portion 1a.
In this embodiment, the bottom surface 1f1 of the groove 1f and the surface of the woofer mounting recess 1e1 are set to have the same depth with respect to the baffle surface 1e. In FIG. 8, the range excluding the groove 1 f in the range covered with the net 6 is indicated by hatching.

The tip of the rising portion 6b of the net 6 is in contact with the bottom surface 1f1 of the groove portion 1f. Therefore, the bottom surface 1f1 regulates the position in the depth direction (direction perpendicular to the baffle surface 1e) when the net 6 is attached.
A plurality of drain holes 1g are formed on the bottom surface 1f1 along the inner wall surface 1a1 of the frame portion 1a. Specifically, the hole has a diameter of 2.5φ, and four holes are provided on the short side, four are provided on the long side, and one common corner is provided at a total of seven.
The drain hole 1g may be provided corresponding to the side that can be the lower side (the ground side) of the speaker device 50 in the installed state, and the speaker device 50 of this embodiment can be installed vertically and horizontally as described above. Therefore, it is provided corresponding to a pair of short sides and long sides.

In such a configuration, the drain hole 1g of the speaker device 50 opens at a position corresponding to the edge 6c of the net 6 on the front side of the cabinet 3 on the bottom surface 1f1 of the groove 1f as shown in FIG. It is provided as follows.
Therefore, since the opening is located at the position covered with the net 6 and the splash prevention filter 13, it cannot be easily visually recognized from the outside, and the appearance quality of the speaker device 50 does not deteriorate.
Further, particularly in this embodiment, the drain hole 1g is disposed in the vicinity of the position facing the end portion 6b1 of the rising portion 6b around the net 6 on the bottom surface 1f1 of the groove portion 1f. Regardless of the degree of blindfolding due to the difference in hanging, it is always difficult to be seen from the outside.

  Further, since the hole is not directly opened to the outside, it is extremely difficult for the insect to enter the inside through this hole, and the hole is blocked by the nest and the drainage performance is not deteriorated.

  Further, since the drain hole 1g is not directly open to the outer surface of the cabinet, it is not easy for water to enter from the drain hole 1g into the interior at the time of rain, etc. The reliability of the speaker device itself is improved.

In addition, in the embodiment, as shown in FIG. 7, the drain hole 1g is opened at a position away from the inner wall surface 2c of the side portion 2a by the distance d.
Moreover, the following water pool part 14 is provided in the baffle board side of the inner wall surface 2c.
That is, the inner side of the protruding frame portion 1a is a gap 14a, and the inner wall surface 2c of the back cabinet 2 is provided with a step portion 2d that extends the vicinity of the combination portion P outward.
Therefore, the water reservoir portion 14 is formed by the gap 14a and the space 14b obtained by expanding outward by the step portion 2d. In FIG. 6, the water reservoir portion 14 is shown with shading.

In addition, the inner wall surface 2c is formed with an inclination in a direction extending outward from the back of the back cabinet 2 toward the combination part P.
Further, the drain hole 1g is formed to open to the outside above the water reservoir portion 14.
Furthermore, the internal circuit unit 10, the terminal unit 11, and the speaker units 4 and 5 are arranged so as to be positioned at least inside the drain hole 1g, in other words, in the installed state.
Further, in order to prevent the woofer 4 from becoming a movement path of water droplets moving on the inner wall, an annular rib 1b1 standing inward is formed around the woofer mounting hole 1b.

Next, the penetration of water from the outside and the discharge of the entered water to the outside in the speaker device 50 will be described in detail.
Again, this speaker device 50 is designed so that water such as rain does not easily enter from the outside.
That is, the consideration is the disposition of the splash preventing filter 13 against the intrusion from the front surface, and the adoption of the uneven structure in the combination portion P provided for the intrusion from the side portion 2a.

However, when water is bathed together with high wind pressure such as rain under a typhoon, the water droplets pass through the splash prevention filter 13 and reach the inside, and from the fitting part of the parts such as the attachment surface of the woofer 4 There is a case where it slightly enters the inside.
In addition, in the combination part P, ingress of water can be sufficiently prevented when no pressure is applied, but in the case of rain accompanied by high wind pressure, the inside of the combination part P so as to penetrate into the slight gap. Intrusion may occur.

Water droplets that have entered through such a path move to the bottom surface by their own weight while gathering along the inner walls of the cabinet 3. Since the inner wall surface 2c of the bottom surface is inclined as described above, the water droplets that have reached the bottom surface are guided to the water reservoir portion 14 and accumulated there.
Then, when water is accumulated exceeding the amount of water stored in the water reservoir 14, that is, when the water surface is applied to the drain hole 1g, the water passes through the splash prevention filter 13 and the net 6 and is discharged to the outside from the hole 1g. .

The amount of stored water is the largest when the speaker device 50 is disposed horizontally (the state of FIG. 6), and when the speaker device 50 is disposed at an inclination, the water surface is applied to the drain hole 1g by a smaller amount. Since it is discharged to the outside, the amount of stored water decreases.
When water accumulates in the water reservoir 14, the water does not leak outside from the combination part P at the water pressure level.

Accordingly, in any case, the drain hole 1g is opened at a position away from the inner wall surface 2c by the distance d, and further, the water reservoir 14 is provided. After the elapse of time, water does not drip from the drain hole 1g, and there is no problem that the person underneath gets wet.
Then, the water accumulated on the inner surface side of the water reservoir 14 or the like does not droop outside but eventually disappears by evaporation.

  The embodiment of the present invention is not limited to the configuration and procedure described above, and it goes without saying that modifications may be made without departing from the scope of the present invention.

The position of the combination part P is not limited to the position of this embodiment. Specifically, you may provide in the position (rear side of a cabinet) which avoided the water pool. In that case, when the back cabinet 2 is formed by resin molding, the stepped portion 2c is undercut, so that it is preferable to form a water pool without the stepped portion 2c.
The water pool portion is a space determined by the inner side surface of the cabinet and the depth from the surface to the drain hole, and is not particularly limited in capacity or shape.

Although a substantially box-shaped speaker device has been described as an example of the embodiment, the shape of the baffle board may be a circular cylindrical shape or a hemispherical shape, or may be another shape.
The splash prevention filter is not necessarily provided. In that case, the inside of the baffle board 1 becomes visible, and although the possibility of ingress of water droplets from the front surface is increased, the effect of draining the water that has entered the inside of the cabinet to the outside is similarly demonstrated. Needless to say.
Further, the punching net is not limited to the punching metal, and it may be not particularly perfect as long as it provides a certain degree of blinding effect and allows sound to pass.
In addition, the cabinet of the embodiment has been described as a closed type speaker, but a so-called bass reflex type may be provided with a duct that communicates the inside and outside of a baffle board.
In this case, although water can enter from the duct with respect to the sealed type, the above-described water discharge effect is similarly exhibited, so that it can be used well outdoors and high reliability can be obtained. Needless to say.

It is a front view which shows the Example of the speaker apparatus of this invention. It is a top view which shows the Example of the speaker apparatus of this invention. It is a right view which shows the Example of the speaker apparatus of this invention. It is a rear view which shows the Example of the speaker apparatus of this invention. It is an assembly figure in the Example of the speaker apparatus of this invention. It is sectional drawing of the Example of the speaker apparatus of this invention. It is an expanded sectional view of the principal part in the Example of the speaker apparatus of this invention. It is a front view of the principal part in the Example of the speaker apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Baffle board 1a Frame part 1a1 Inner wall surface 1b Woofer attachment hole 1b1 Rib 1c Horn part 1e Baffle surface 1f Groove part 1f1 Bottom face 1g Drain hole (opening part)
2 Back cabinet 2a Side portion 2b Rear surface 2c Inner wall surface 2d Step 3 Cabinet 4 (Woofer) Speaker unit 5 (Tweeter) Speaker unit 6 Net 6a Main surface portion 6b Rising portion 6b1 End portion 6c Edge portions 7a, 7b Screw 8 Bracket 8a Base portion 8a1 Mounting hole 8b Arm portion 9 Signal line 10 Circuit portion 10a Substrate 10b Transformer 11 Terminal portion 12 Spacer (nonwoven fabric)
13 Splash prevention filter 14 Water reservoir 50 Speaker device C Rotating shaft P Combined part

Claims (3)

In a speaker device comprising: a speaker unit; a baffle board to which the speaker unit is attached and a cabinet having side portions connected to the speaker unit; and a net attached to the cabinet so as to cover the speaker unit.
The edge of the net is fitted to the baffle board,
The speaker device according to claim 1, wherein the baffle board has an opening that communicates the inside and the outside of the cabinet at a position corresponding to an edge of the net.   The speaker device according to claim 1, wherein the cabinet has a water pool portion formed by denting the baffle board side outward in an inner wall surface corresponding to the opening of the side portion. In a speaker device comprising: a speaker unit; a baffle board to which the speaker unit is attached and a cabinet having side portions connected to the speaker unit; and a net attached to the cabinet so as to cover the speaker unit.
The baffle board has an opening that communicates the inside and outside of the cabinet at a position corresponding to the edge of the net;
The speaker device according to claim 1, wherein the cabinet has a water pool portion formed by denting the baffle board side outward in an inner wall surface corresponding to the opening of the side portion.

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