KR200462890Y1

KR200462890Y1 - Bundt Directional Speaker with Ultrasonic Cell

Info

Publication number: KR200462890Y1
Application number: KR2020110006056U
Authority: KR
Inventors: 박종민
Original assignee: (주)이사야
Priority date: 2011-07-04
Filing date: 2011-07-04
Publication date: 2012-10-09

Abstract

The present invention includes a lower case which is formed in an inner space by being fastened to the upper case in a circular plane having a central opening and formed in a hollow, and accommodating a speaker unit in the inner space; It includes a circular strip side and the upper surface which is integrally connected to the hollow surface is formed, the side and the upper surface is integrally formed to have a continuous curved surface, the upper surface is formed with two or more openings to form all of the ultrasonic cells Or an upper case in which a portion is exposed; A donut-shaped directional speaker having an ultrasonic cell including a base unit disposed in the inner space and having a disc shape having a center opening corresponding to a lower case, and having at least two ultrasonic cells on the base. It is about.

Description

Bundled Directional Speaker with Ultrasonic Cell

The present invention relates to a donut-shaped directional speaker, comprising a speaker unit between the upper case and the lower case in which the hollow is formed, to form a directional ultrasonic waves through the ultrasonic cell included in the speaker unit, to provide sound to the opening of the upper case The present invention relates to a donut shaped directional speaker having an ultrasonic cell to be discharged.

Speakers are a commonly used sound reproducing means, but due to the natural radiating nature of the sound (omni-directional), they often interfere with an unspecified number of people who do not want to hear, and therefore, headphones or earphones are often used. However, when the headphones or earphones are used for a long time, the ear is inconvenient and there is a problem of blocking other sounds, and the need for directional speakers is increasing.

The directional speaker is a speaker capable of outputting sound only in a desired direction to form a personal acoustic space, and includes a directional speaker of an ultrasonic method, a dome method, and an array method.

The dome method has a disadvantage that it is bulky and poor in directivity because the dome method must have a wide reflector in the shape of a dome, and the array method needs to increase the speaker spacing in order to obtain directivity in the low frequency band, thereby increasing the overall size of the speaker module. It is difficult to miniaturize the product.

Ultrasonic speakers with relatively good directivity radiate sound only in certain directions, reducing energy loss.

In particular, many facilities such as exhibition halls, museums, art galleries, public relations halls, cafes, restaurants, and gyms use a lot of images and audio to convey different information. Users will experience inconvenience.

In addition, in public places, the speaker is often installed on the ceiling, but when the rectangular product is installed on the ceiling, the speaker protrudes downward from the ceiling, so the interior effect is reduced, and when it is inserted into the ceiling, the ceiling needs to be partially removed. Not easy to install

On the other hand, in general, when using a video and sound or a video and a guide at the same time, there is a growing need for a speaker that can be installed without obscuring the display or guide light previously installed.

The object of the present invention is to provide a superdirectional speaker using an ultrasonic cell.

In addition, the present invention has an object to provide a super-directional speaker that can be installed without disturbing the existing light source or display image provided simultaneously with the sound.

In order to achieve the above object, in the present invention, the center case is opened and the hollow case is formed in a circular plane with the upper case is fastened to form an inner space, the lower case for receiving the speaker unit in the inner space; It includes a circular strip side and the upper surface which is integrally connected to the hollow surface is formed, the side and the upper surface is integrally formed to have a continuous curved surface, the upper surface is formed with two or more openings to form all of the ultrasonic cells Or an upper case in which a portion is exposed; A donut-shaped directional speaker having an ultrasonic cell including a base unit disposed in the inner space and having a disc shape having a center opening corresponding to a lower case, and having at least two ultrasonic cells on the base. To provide.

At this time, the upper case and the lower case is characterized in that made of any one or a combination of two or more selected from plastic, glass, metal.

In addition, the opening may be divided into three opening groups, and one opening group may include 8 to 14 openings.

In the speaker of the present invention, super-directional performance can be enhanced by disposing an ultrasonic cell.

In addition, the speaker of the present invention can be disposed without disturbing the viewing of the image from the pre-installed light source or display can utilize the space efficiently.

1 is a schematic perspective view showing a superdirectional speaker of the present invention.
2A and 2B are a perspective view and a plan view according to the embodiment of FIG.
3 is an exploded perspective view illustrating an internal structure of a superdirectional speaker according to the embodiment of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor may appropriately design the concept of the term appropriately to describe its own design in the best way possible. It must be interpreted in terms of meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be substituted for them at the time of the present application It should be understood that there may be equivalents and variations.

1 is a schematic perspective view showing a speaker of the present invention, Figures 2a and 2b is a perspective view and a plan view according to the embodiment of Figure 1, Figure 3 is a super-directional according to the embodiment of Figure 1 An exploded perspective view showing the internal structure of the speaker is shown.

As shown in the figure, the speaker 1 of the present invention is composed of a lower case 30 and the upper case 10, the lower case 30 is flat, the upper case 10 is curved, the upper case 10 ) And the lower case 30 are combined to have a donut (round tube) shape having a flat bottom. The upper case 10 and the lower case 30 may be made of plastic, glass or metal.

As shown in FIG. 3, the lower case 30 is coupled to the upper case 10 in a circular plane in which a center is opened to form a hollow to accommodate the speaker unit 20 therein.

The upper case 10 includes a circular strip-shaped side surface 12 and an upper surface 11 that is a curved surface integrally connected thereto. At this time, the upper surface 11 has a central opening at a position and size corresponding to the opening formed in the center of the lower case 30 to form a hollow, as shown in the upper case 10 and the lower case 30 When it joins, it becomes the tube shape which the opening communicated with the center part.

In the drawing, the side surface 12 and the top surface 11 are illustrated as flat bands to explain the side surface 12 and the top surface 11, respectively, but the side surface 12 and the top surface 11 are integrally formed to have a continuous curved surface as shown in FIG. 1. It is preferable to be.

As shown in FIG. 3, the upper surface 11 has a curved shape in which a central portion of the circular plate is convex, and a plurality of openings 13a are formed in the upper surface 11, between the lower case 30 and the upper case 10. A portion of the plurality of ultrasonic cells 22 disposed in the are exposed.

When the upper case 10 and the lower case 30 are combined, the center becomes a circular tube shape with an open center, and another device is disposed at the opened center and can be used together with the speaker 1 of the present invention. For example, a circular clock, a display, a guide lamp, or the like may be disposed at the opened center. In addition, when the speaker 1 is disposed on the ceiling, it may be exposed to the outside and used as an interior article, or may be arranged in a pendant manner by connecting a line or a string to an open center (hollow).

When the upper case 10 and the lower case 30 are combined, they are formed in a space therein, and a speaker unit 20 is disposed in the space, and the speaker unit 20 includes a base 21 and an ultrasonic cell 22. ). As shown in FIG. 3, the base 21 has a disc shape having a central opening corresponding to the lower case 30, and two or more ultrasonic cells 22 are disposed on the base 21.

The ultrasonic cell 22 is an ultrasonic piezoceramic transmitter ("Piezoelectric Ultrasonic Air Ceramic Transducers"), and when an electric signal is applied to the vibrating plate vibrates to generate an ultrasonic wave. Piezoelectric is a phenomenon that positive and negative charges are proportional to external force on both sides of a plate when pressure is applied to a certain plate in a certain direction, and strong vibration occurs when elastic vibration and electric vibration coincide with the natural vibration of the crystal plate. The ultrasonic cell 22 of the present invention is a piezoelectric element using such a piezoelectric phenomenon, and when an ultrasonic wave generation signal is input through an amplifier, the vibration plate inside the ultrasonic cell 22 shakes to generate ultrasonic waves. Has

The ultrasonic cells 22 are provided in plural, and as the number of the ultrasonic cells 22 increases, sound energy increases and directivity becomes apparent.

A plurality of openings 13a are formed in a plurality of groups of openings 13a, and the openings 13a are divided into three opening groups 13 based on a space where the openings 13a are not formed. One group 13 may include about 8 to about 14 openings 13a. As described later, the opening 13a is a space in which a part of the ultrasonic cells 22 disposed therein are exposed to open the sound of the speaker 1 to the outside.

The opening 13a is a factor that affects the directivity along with the number of the ultrasonic cells 22. The ultrasonic cell 22 exposed through the opening 13a, that is, the higher the opening ratio, has the magnitude and directivity of sound energy. Since the opening 13a is improved, the opening 13a may be formed to correspond to the position where the ultrasonic cell 22 is disposed.

As shown, the directional speaker 1 of the present invention has a larger diameter of the lower case 30 than the upper case 10, the space from the lower case 30 toward the opening 13a of the upper case 10. The inverse trumpet shape is narrowed so that the sound transmitted to the space between the lower case 30 and the upper case 10 proceeds toward the upper surface 11 to exit through the opening 13a.

Meanwhile, although not shown, two speakers 1 of the present invention may be symmetrically disposed so that the lower case 30 is in contact with each other, thereby manufacturing a speaker 1 having a shape having directivity in both directions. to be.

1 Speaker 10 Top case 11 Top 12 Side
13 opening group 13a opening
20 Speaker unit 21 Base 22 Ultrasonic cell 30 Lower case

Claims

A lower case 30 which is connected to the upper case 10 in a circular plane in which a center is opened to form a hollow and forms an inner space, and accommodates the speaker unit 20 in the inner space;
A circular band-shaped side surface 12 and an upper surface 11 that is integrally connected to the hollow surface is formed, the side surface 12 and the upper surface 11 is integrally formed to have a continuous curved surface, the upper surface An upper case 10 having two or more openings 13a formed in the 11 to expose all or part of the ultrasonic cells 22;
The speaker unit 20 disposed in the inner space and having a disc-shaped base 21 having a center opening to correspond to the lower case 30, and two or more ultrasonic cells 22 on the base 21. );
A donut-shaped directional speaker having an ultrasonic cell comprising a.

The method of claim 1,
The upper case 10 and the lower case 30 is a donut-shaped directional speaker having an ultrasonic cell, characterized in that any one or a combination of two or more selected from plastic, glass, metal.

The method of claim 1,
The opening 13a is divided into three opening groups 13, and one opening group 13 includes a donut-shaped directional speaker having an ultrasonic cell, characterized in that 8 to 14 openings 13a are included. .