JPH0616531U - Partition - Google Patents

Abstract

(57) [Summary] [Purpose] Suitable for thinning, dust in the air does not easily adhere, and there is a wide choice of materials such as decorative cloth, and the sound is diffused evenly on both sides. , It is possible to create a sound field with excellent clarity, etc., and provide a partition suitable for partitioning open spaces. A flat-plate speaker 2 including a flat-plate diaphragm 10 made of a high-density foam and a moving coil type driving unit 11 for driving the flat-plate diaphragm 2 is built in a speaker housing portion of an internal space 7, and a sound is emitted from both sides. It is configured to be radiable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a partition for partitioning an indoor space, more specifically, a partition with a built-in flat speaker.

[0002]

[Prior art]

 The interior of many modern buildings is a large open space, and the open space is divided into several small spaces by partitioning or low partitioning as necessary to create individual rooms or semi-private rooms. , They are used for multiple purposes. The reason is that, for example, when the layout is changed, it is easy to change the position of the partition, and there is a result of the demand for efficiency improvement due to the interior design and functional equipment layout.

However, in the case of partitioning in this way, in order to obtain a comfortable space, there are problems such as a request for noise removal by air conditioning and various OA devices, secret leakage due to sound leakage from conferences, telephones, etc. Various issues such as how to efficiently carry out BGM have been highlighted.

Regarding the former noise and sound leakage, it is conceivable to make the partition thicker and improve the sound insulation by devising the material, structure, etc., but in many aspects such as manufacturing and cost. There's a problem. In such a situation, as a method for satisfying the former and latter conditions, a method called sound masking in which sound is masked by sound is used to generate BGM or white noise corresponding to room noise or conversation level from a speaker. Is being considered.

[0005]

[Problems to be solved by the device]

 As a method for this, conventionally, speakers that are installed indoors are generally installed on the ceiling, but it is very difficult to add speakers to the ceiling according to the layout in open space buildings, and especially in leased buildings. , There was a problem.

On the other hand, as shown in Japanese Utility Model Laid-Open No. 1-96924 and Japanese Utility Model Laid-Open No. 2-101910, there is a system in which a speaker is incorporated in a partition. However, the speaker used in these prior examples is a general cone speaker. Therefore, it is difficult to make the partition thinner, and since the diaphragm of the conventional speaker makes a piston movement, dust particles in the surrounding air are easily adsorbed to the saran net or grill, which poses a problem in terms of cleaning and hygiene. In addition, as a component of the partition, the decoration materials such as saran net are limited to those that allow air to pass through easily, and the range of choice of materials is limited. Also, in the case of sound masking, it is desirable to create a uniform sound field in various parts of the room, but a cone speaker lacks sound dispersion, it is difficult to obtain a uniform sound field, and the reproduced sound is emitted only in one direction. There was a problem that I could not.

The present invention has been proposed in view of the above, and an object thereof is to reduce the thickness and to prevent dust in the air from being adsorbed, so that there is room for selecting a material such as a decorative cloth. It is intended to provide a partition suitable for partitioning an open space by expanding the space and creating a good sound field that is uniform on both sides.

[0008]

[Means for Solving the Problems]

 In the present invention, a flat-plate speaker having a flat-plate vibration plate made of high-density foam and a moving coil type driving unit for driving the flat-plate vibration plate is built in the speaker housing of the internal space, and sound can be emitted from both sides. The above configuration achieves the above objective.

[0009]

[Action]

 Since a flat speaker is used in the present invention, even if it is housed inside, the flat speaker is less thick than the cone speaker and is suitable for the thickness of the partition, so the total thickness of the partition is 60 to 80 mm. It can be pressed down to achieve thinness. In addition, the flat speaker has a fairly tight periphery around the diaphragm, and since the diaphragm is a flat plate, less air flows in, so dust particles in the air are less likely to be adsorbed, compared to the cone speaker, and Generally, there is no significant sound quality deterioration even if the cloth used for partitioning is used as it is, so there is no need to pay attention to the material, and there is more room for selection of material. In addition, since the flat panel speaker can play back on both sides, it can emit sound on both sides, and since it is basically omnidirectional, it has excellent intelligibility and sound diffusion, so a uniform sound field can be generated on both sides. Can be played on.

[0010]

【Example】

 FIG. 1 shows a first embodiment of the present invention, in which 1A is a standing partition which is erected in an open space and has a flat speaker 2 incorporated therein, and 1B is a continuous partition which is connected to the above partition 1A. In a normal partition that does not have a flat speaker 2, the types and arrangements of these partitions 1A and 1B are appropriately combined to define an open space, and a table 3 and a chair 4 are arranged in each space. However, they are available individually.

FIG. 2 is a perspective view showing the internal structure of the flat panel speaker 2 incorporated in the partition 1A. Thus, the partition 1A is provided on the outer peripheral portion and includes a frame-shaped frame 5 having a predetermined width and a core material 6 provided therein, and a predetermined portion of the core material 6 is a hollow hollow space. A portion 7 is formed, and the flat speaker 2 is accommodated in the speaker accommodating portion including the space 7 by an appropriate mounting means. Also, a decorative cloth 8 is attached to the front and back surfaces of the core material 6 and the flat panel speaker 2 etc. to give an appearance consideration. Although not particularly shown, it is preferable to provide a connector for sending an audio signal to the flat panel speaker 2 that can be connected to the external lead wire, at an appropriate position of the partition 1A.

Further, the flat panel speaker 2 includes a flat plate-shaped diaphragm 10 provided inside the frame-shaped frame 9 and a drive unit 11 provided on the back surface of the diaphragm 10 and including a magnetic circuit and the like. The driving unit 11 is of a moving coil type having a well-known structure, and has a supporting plate 12, and the supporting plate 12 is supported by a pair of rod-shaped supporting members 13 connected and supported by the frame 9. .

FIG. 3 is a vertical sectional view of the flat panel speaker 2. The diaphragm 10 of the flat speaker 2 is made of a high density foam material such as lightweight polystyrene foam and primary foam beads, and its front surface is flush. The outer surface of the main part on the back side is a substantially arcuate surface whose thickness decreases toward the outer circumference, and a V cut 10a is formed on the outer circumference. The V-cut 10a portion serves as a vibration area, and the outer periphery of the V-cut 10a is formed with a rising portion 10b so that vibration does not spread. The outer end of the diaphragm 10 is fixed to the frame 9 via a damper 14 made of urethane foam material.

The drive unit 11 first has a support plate 12 in which an opening window 12a is formed. A magnetic circuit 15 including a magnet, a yoke, and a plate having a well-known structure is provided on the back side of the support plate 12 via a voice coil in a magnetic gap (not shown) of the magnetic circuit 15. The rear part of the voice coil 16 is provided, and the front part of the voice coil 16 is provided with a hammer 17 made of expanded polystyrene or ABS resin. An adhesive 18 having elasticity such as silicone is applied to the front part of the hummer 17. The front side is connected to the diaphragm 10 via a sound absorbing material 19 made of synthetic cork or styrofoam. The main part of the drive unit 11 is composed of the above-mentioned members.

In operation, when a voice signal is applied to the voice coil 16, the voice coil 16 arranged in the magnetic gap of the magnetic circuit 15 is driven according to Fleming's left-hand rule, and the driving force is transmitted to the hammer 17. In addition, the vibration is transmitted to the diaphragm 10 through an elastic adhesive layer or the like, and the diaphragm 10 vibrates and reproduces sound without causing damage.

In this case, the diaphragm 10 is made of a flat plate, and since the flat speaker 2 has a polar pattern of omnidirectionality over the entire band, even if it is embedded in the partition 1A, the directional pattern of 180 ° is obtained. The sound dispersibility is extremely good. That is, FIG. 4 is a comparison between the conventional cone speaker 20 and the flat panel speaker 2 used in the present invention, in a ratio of about 3: 1, that is, as shown by the line A-A ', the cone speaker 20 has three components. One flat speaker 2 can cover the area for each piece. This leads to labor saving in installation work, which is an advantage that leads to overall cost reduction.

Further, since it is a flat plate, the diaphragm 10 resonates in a split manner, which provides excellent high-range directivity and little deterioration in the high range, resulting in good intelligibility and partition 1A for sound masking or the like. Is suitable as

Further, the diaphragm 10 is made of high density foam such as styrofoam, and the diaphragm 10 made of this material is easy to apply a water-based paint, or to perform secondary processing such as pasting wallpaper, decorative cloth, etc. The range of choices is widened, and in this case, the sound quality is not deteriorated. Therefore, from the appearance of the partition 1A, it is possible not to know that the flat panel speaker 2 is inside, and the partition 1A has excellent flexibility in terms of decoration and design.

Further, due to the material of the diaphragm 10, the water resistance is extremely high and it does not change over time, so that it can be used for a long period of time and can also be used as an outdoor partition 1A.

FIG. 5 shows another arrangement example of the partition 1A. For example, the partition 1A of the type with the flat panel speaker 2 is arranged in series, and the normal partition 1B is generally shaped like a cross in the direction intersecting with the partition 1A. The open space is divided into four parts, and each space can be used independently.

FIG. 6 shows still another usage example, which can be used in various modes depending on the purpose and application.

[0022]

[Effect of device]

 As described above, since the partition 1A of the present invention includes the lightweight and thin flat speaker 2 including the flat diaphragm 10 made of high-density foam, the partition 1A can be thinned. . In addition, since the sound is emitted from the surface itself of the diaphragm 10 as it is, rather than reproducing the sound by the piston movement like a cone speaker, there is little dirt due to the attachment of dust in the ambient air. In addition, the polar pattern is round and has good directivity, and also has good directivity even in a high frequency range, and has excellent sound diffusivity and intelligibility in both directions. Therefore, it is suitable as a partition 1A for BGM and sound masking. Moreover, the decorative cloth 8 used for the exterior is not particularly limited, and the degree of freedom in appearance and design is extremely high.

[Brief description of drawings]

FIG. 1 is a layout example of a partition of the present invention.

FIG. 2 is a perspective view showing the internal structure of a flat panel speaker used in the partition of the present invention.

FIG. 3 is a vertical cross-sectional view showing details of the internal structure of the above flat panel speaker.

FIG. 4 is an explanatory diagram comparing the sound diffusion characteristics of a conventional cone speaker and a flat speaker used in the present invention.

FIG. 5 is another arrangement example of the partition of the present invention.

[Fig. 6] Another example of the above arrangement.

[Explanation of symbols]

 1A Partition 1B Ordinary Partition 2 Flat Speaker 3 Table 4 Chair 5 Frame 6 Core Material 7 Space 8 Decorative Cloth 9 Frame 10 Vibration Plate 10a V Cut 10b Rising Part 11 Drive Part 12 Support Plate 12a Opening Window 13 Support Member 14 Damper 15 Magnetic Circuit 16 Voice Coil 17 Hammer 18 Adhesive 19 Sound Absorbing Material

Claims (1)

[Scope of utility model registration request] 1. A flat-panel speaker (2) comprising a flat-plate vibration plate (10) made of high-density foam and a moving coil type driving unit (11) for driving the vibration plate is housed in a speaker in an internal space (7). A partition for an open space partition, which is characterized by being built into the part and capable of emitting sound from both sides.