JP2008113365A - Composite loudspeaker apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thin type composite loudspeaker apparatus. <P>SOLUTION: The tin type composite loudspeaker apparatus 10 is obtained by being provided with a loudspeaker 1 having a cone type diaphragm, a plane loudspeaker 2 set up at a diaphragm opening of the loudspeaker 1 and a joint 3 to couple the loudspeaker 1 with the plane loudspeaker 2 and by setting the joint 3 at an end of the diaphragm opening of the loudspeaker 1 having the cone type diaphragm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite speaker device including, for example, a plurality of speakers.

  As a conventional technique, when it is difficult to cover a voice band with a speaker having one cone-shaped diaphragm, as shown in Non-Patent Document 1, two cone-shaped diaphragms for bass and treble are used. There is a method of using a coaxial type composite speaker in which the provided speakers are coaxially arranged.

Takeo Yamamoto “Speaker System (above)” Radio Technology Co., Ltd., July 15, 1977, p. 134-p. 140

  The conventional composite speaker device is configured as described above, and it is necessary to dispose a speaker having two cone-type diaphragms on the same axis, and thus there is a problem that the depth of the speaker body is increased.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a thin composite speaker device.

  The composite speaker device according to the present invention includes a speaker having a cone-type diaphragm, a flat speaker, a joint portion connecting the speaker having the cone-type diaphragm and the flat speaker, and the joint portion has a cone-type diaphragm. It is provided at the end of the diaphragm opening of the speaker.

  According to the composite speaker device of the present invention, the composite speaker device can be thinned.

Embodiments of the present invention will be described below.
Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a composite speaker device according to Embodiment 1 of the present invention.
As shown in FIG. 1, the composite speaker device 10 includes a speaker 1 having a cone-shaped diaphragm, a flat speaker 2, and a joint portion 3 that connects the speaker 1 and the flat speaker 2, and the joint portion 3 is a cone type. It is provided at the end of the diaphragm opening of the speaker 1 having the diaphragm.

  First, the speaker 1 is a speaker provided with a cone-shaped diaphragm, and is generally used as a low-frequency sound source. In general, a speaker having a cone-shaped diaphragm such as the speaker 1 includes a magnetic circuit including a pole, a magnet, and a plate, a voice coil in which a coil portion is disposed in a magnetic gap of the magnetic circuit, A cone-type diaphragm coupled to the bobbin, and the cone-type diaphragm vibrates back and forth to emit sound waves.

  The flat speaker 2 is a speaker having a flat diaphragm, and is generally used as a high-frequency sound source.

FIG. 2 is a configuration diagram of a flat speaker used in Embodiment 1 of the present invention.
The flat speaker 2 shown in FIG. 2 includes a first sheet magnet 22a and a second sheet magnet 22b, and a coil arranged so as to face the first sheet magnet 22a and the second sheet magnet 22b on the entire surface. The flexible substrate 21, the first sheet magnet 22a and the second sheet magnet 22b, and the first buffer sheet 23a and the second buffer sheet 23b disposed between the flexible substrate 21 and the first and second sheet magnets 22a and 22b. A supporting case upper surface 24a and a case lower surface 24b are provided. Further, the flat speaker 2 can be 5 mm or less with such a configuration.

  Here, in the first sheet magnet 22a and the second sheet magnet 22b, strip-shaped multipolar magnetized patterns N and S made of sintered ferrite magnets are formed on one side almost on the entire surface facing the flexible substrate 21. It is what. The first sheet magnet 22a has a sound radiation hole.

  The flexible substrate 21 is a planar diaphragm, and is disposed so as to face the first sheet magnet 22a and the second sheet magnet 22b as shown in FIG. 2, and a coil made of a meandering conductor pattern is formed on the entire surface. Is formed.

  The first buffer sheet 23a and the second buffer sheet 23b are formed of a non-woven fabric having air permeability and acoustic energy permeability, and the first buffer sheet 23a and the second buffer sheet 23b as shown in FIG. Is arranged between the first sheet magnet 22a and the second sheet magnet 22b and the flexible substrate 21, and the flexible substrate 21 prevents the first sheet magnet 22a and the second sheet magnet 22b from colliding when vibrating. In addition, it plays a role as a suspension.

  The case upper surface 24a has a sound radiation hole communicating with the sound radiation hole of the first sheet magnet 22a. For the case upper surface 24a and the case lower surface 24b, for example, an iron plate, a nickel / iron alloy (permalloy) plate or the like is applied.

  The operation of the flat speaker 2 shown in FIG. 2 will be described. When a current flows through a coil composed of a meandering conductor pattern formed on the surface of the flexible substrate 21, the coil and the strip-shaped multipolar magnetization pattern of the first sheet magnet 22a and the second sheet magnet 22b are electromagnetically generated. Therefore, vibration is generated in the flexible substrate 21 according to Fleming's law. This vibration passes through the case upper surface 24a and the sound radiation hole of the first sheet magnet 22a, and sound is output to the outside from the direction of the sound radiation hole.

  As shown in FIG. 1, the joint portion 3 is located at the diaphragm opening of the speaker 1 having a cone-shaped diaphragm, and connects the speaker 1 having the cone-shaped diaphragm and the flat speaker 2. The joint portion 3 may be formed integrally with the frame 10 or may be formed independently of the frame 10. The joint part 3 is made of a resin or metal material, and connects the speaker 1 and the flat speaker 2 with an adhesive.

  By using the flat speaker 2 having the structure shown in FIG. 2 as the flat speaker, the thin composite speaker device 10 can be realized. The connection position of the flat speaker 2 is a place in the opening of the speaker 1 where the sound of the speaker 1 is unlikely to be disturbed, and specifically, provided at the end of the opening of the speaker 1.

  At present, plasma displays and liquid crystal displays have become the mainstream, and the displays are becoming thinner, and there is an increasing need for thinning while maintaining high sound quality in the sound source speaker. By using a flat speaker having a structure as shown in FIG. 2 for this speaker 2, the space in the composite speaker can be opened compared to the conventional coaxial composite speaker arranged on the same axis. The thin composite speaker device 10 can be realized while being maintained.

  Further, a place where the speaker device is incorporated in the liquid crystal television or the plasma television has a structure serving as an acoustic box, and the composite speaker device is installed at the place.

FIG. 3 is a diagram showing frequency characteristics according to the first embodiment of the present invention.
In FIG. 3, the horizontal axis indicates the frequency, and the vertical axis indicates the sound pressure level of the sound wave. In the case of the speaker 1, it is indicated by the frequency characteristic 1f, in the case of the flat speaker 2, it is indicated by the frequency characteristic 2f, and when the speaker 1 and the flat speaker 2 are combined, it is indicated by the frequency characteristic 10f.

  As shown by the frequency characteristic 10f, by combining the speaker 1 and the flat speaker 2, the frequency characteristics are complemented with each other, and the reproduction sound range can be set from the low range to the high range.

  According to the first embodiment described above, the speaker 1 including the cone-type diaphragm, the flat speaker 2, and the joint portion 3 connecting the speaker 1 and the flat speaker 2 are provided, and the joint portion is the cone-type diaphragm. Is provided at the end of the diaphragm opening of the speaker 1 having the above-described effect, and the thin composite speaker device 10 can be realized.

  Further, according to the first embodiment, a planar speaker having a structure as shown in FIG. 2 is used as the planar speaker 2, and the joint portion is provided at the end of the diaphragm opening portion of the speaker 1 including the cone-type diaphragm. As a result, it is possible to realize a thin composite speaker device 10 similar to the plasma display and the liquid crystal display while maintaining high sound quality.

  Further, according to the first embodiment, by combining the speaker 1 and the flat speaker 2, the frequency characteristics are complemented with each other, and the frequency characteristics as shown by 10f in FIG. There is an effect that the composite speaker device 10 having a sound range can be realized.

  Moreover, according to Embodiment 1, when the flat speaker 2 is 5 mm or less, the thin composite speaker device 10 can be realized.

  In addition, according to the first embodiment, the location where the speaker device is incorporated into the liquid crystal television or the plasma television has a structure of the acoustic box, and the actual acoustic box is installed by installing the composite speaker device at that location. Compared to the use, the cost can be reduced.

Embodiment 2. FIG.
FIG. 4 is a block diagram of a composite speaker device according to Embodiment 2 of the present invention.
As shown in FIG. 4, the composite speaker device 10 is substantially the same as the composite speaker device 10 shown in the first embodiment. However, unlike the first embodiment, the composite speaker device 10 includes a plurality of flat speakers 2.

  The plurality of flat speakers 2 may be speakers of the same frequency band or speakers of different frequency bands. When the frequency bands of the plurality of flat speakers 2 are the same, the sound pressure in the frequency band of the flat speakers 2 is improved as compared with the case where one flat speaker 2 is used. Further, when the frequency bands of the plurality of flat speakers 2 are different, it is possible to realize the composite speaker device 10 that covers the low band with the speakers 1 and covers the high band and the middle band with the plural flat speakers 2. In the second embodiment, two planar speakers 2 are described, but two or more planar speakers 2 may be used. Further, the position where the flat speaker 2 is arranged can also be selected. A specific position is a place in the opening of the speaker 1 where the sound of the speaker 1 is unlikely to be disturbed, and is provided at the end of the opening from the center of the opening of the speaker 1.

  According to the second embodiment described above, since the frequency bands of the plurality of flat speakers 2 are the same, the sound pressure in the frequency band of the flat speakers 2 is improved as compared with the case where one flat speaker 2 is used. Play.

  Further, according to the second embodiment, the composite speaker device 10 that covers the high range and the mid range using the plurality of flat speakers 2 by using the plurality of flat speakers 2 because the frequency bands of the plurality of flat speakers 2 are different. There is an effect that it can be realized.

  In addition, according to the second embodiment, since the frequency bands of the plurality of flat speakers 2 can be freely selected, there is an effect that the composite speaker device 10 having a high degree of freedom in the frequency bands can be realized.

  Further, according to the second embodiment, since the positions of a plurality of planar speakers 2 can be selected, the speakers can be arranged symmetrically and asymmetrically arranged exclusively for the left and right, so that the composite speaker device having a high degree of freedom in speaker arrangement 10 is achieved.

Embodiment 3 FIG.
FIG. 5 is a configuration diagram of a composite speaker device according to Embodiment 3 of the present invention, in which the composite speaker device 10 is placed in an acoustic box 11.

  As shown in FIG. 5, the composite speaker device 10 accommodates a speaker 1 having a cone-shaped diaphragm, a planar speaker 2, a speaker 1 having a cone-shaped diaphragm, and a planar speaker 2 in the same housing. An acoustic box 11 having a joint portion for connecting the speaker 1 having a cone-type diaphragm and the flat speaker 2 is provided, and the joint portion is provided at the end of the diaphragm opening portion of the speaker 1 having the cone-type diaphragm. Since the acoustic box 11 has a joint portion, it is not necessary to prepare a new joint portion.

  In addition, a plurality of flat speakers 2 can be used as in the second embodiment, and a large liquid crystal television or the like can incorporate the composite speaker device 10 housed in the acoustic box 11 into the television.

  According to the third embodiment described above, the speaker 1 including the cone-type diaphragm, the flat speaker 2, the speaker 1 including the cone-type diaphragm and the flat speaker 2 are accommodated in the same casing, and the cone type A sound box 11 having a joint portion for connecting the speaker 1 including the diaphragm and the flat speaker 2 is provided, and the joint portion is provided at the end of the diaphragm opening portion of the speaker 1 including the cone-shaped diaphragm. There is an effect that the cost of the part is reduced.

  Further, according to the third embodiment, the speaker 1 including the cone-type diaphragm, the flat speaker 2, the speaker 1 including the cone-type diaphragm and the flat speaker 2 are housed in the same housing, and the cone-type diaphragm is used. And a sound box 11 having a joint portion for connecting the flat speaker 2 and the joint portion is provided at the end of the diaphragm opening portion of the speaker 1 having a cone-shaped diaphragm. Since it is possible to prevent cancellation by sound waves of opposite phases generated from the rear surface, it is possible to secure a more stable frequency band.

  Further, according to the third embodiment, there is an effect that a more stable frequency band can be secured by incorporating the speaker device housed in the acoustic box into the television.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the composite speaker apparatus by Embodiment 1 of this invention. It is a block diagram of the flat speaker 2 used for Embodiment 1 of this invention. It is a figure which shows the frequency characteristic by Embodiment 1 of this invention. It is a block diagram of the composite speaker apparatus by Embodiment 2 of this invention. It is a block diagram of the composite speaker apparatus by Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Speaker provided with cone-type diaphragm, 1f Frequency characteristic of speaker 1, 2 Planar speaker, 2f Frequency characteristic of 2D planar speaker 3, Joint part, 10 Compound speaker apparatus, 10f Frequency characteristic which combined speaker 1 and flat speaker 11 acoustic box, 21 flexible substrate, 22a first sheet magnet, 22b second sheet magnet, 23a first buffer sheet, 23b second buffer sheet, 24a case upper surface, 24b case lower surface.

Claims (3)

A speaker having a cone-shaped diaphragm;
A planar speaker;
A joint portion that connects the speaker including the cone-shaped diaphragm and the planar speaker;
A composite speaker device, wherein the joint portion is provided at an end of a diaphragm opening portion of a speaker including the cone-type diaphragm. A speaker having a cone-shaped diaphragm;
A planar speaker;
The speaker provided with the cone-type diaphragm and the flat speaker are housed in the same housing, and includes a sound box having a joint portion for connecting the speaker provided with the cone-type diaphragm and the flat speaker,
A composite speaker device, wherein the joint portion is provided at an end of a diaphragm opening portion of a speaker including the cone-type diaphragm.   The composite speaker device according to claim 1, comprising a plurality of the planar speakers.

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