Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPH01138895 [0001] A. Industrial Field of Application The present invention relates to a speaker device suitable for a full range speaker. According to a first essential aspect of the present invention, there is provided a first rigid body of high rigidity and a central portion of the first vibrator, having a suitable rigidity and being lighter in weight than the first vibrator. In the speaker device including the second vibrating body, the second vibrating body is formed in a conical shape with the vibration direction as an axis, and one end side which is the front side in the sound emitting direction is enlarged and opened. The characteristics of the middle to high range are improved by providing the closed hollow portion having the diameter reduced at the end side and closed. C6 Conventional Technology Conventionally, as a speaker device called a so-called full range speaker, for example, a so-called flat speaker using a flat diaphragm is known. As shown in FIG. 5, this speaker device is provided with a vibrator supporting frame 106 by a magnetic circuit 105 including a yoke plate 102, a magnet 103, a voice coil 104 and the like via an appropriate cambling vibrator 101. The flat diaphragm 107 supported by is driven so as to be able to drive the flat diaphragm 107 in a wide frequency range. In this speaker device, as shown by B in FIG. 2, the characteristics at a frequency of 100 t (about z to about 5 kHz have substantially flat characteristics. D1 Problems to be Solved by the Invention As a result of further researches by the present applicants etc., in the above-mentioned speaker device, when the above-mentioned flat diaphragm is made into a rectangle having a side of about 75 mm or more, It turned out that the characteristic of 5 k Hz or more is insufficient. In particular, in the case where an acoustic reflection plate is disposed in front of the sound emission direction of the speaker device to diffuse the sound, the sound pressure level of 5 kHz or more needs to be sufficiently secured. Therefore, the present invention is proposed in view of the above-described circumstances, and aims to provide a speaker device having a characteristic in which the characteristics of the high range are improved and the high range of the frequency 5 kHz or more is emphasized. In order 11-05-2019 1 to solve the problems described in the means for solving the problem 1 and the problems described above, the speaker device according to the present invention comprises: a first vibrating body made of a high rigidity material; The vibration body of the I-stroke 2 has an axis in the vibration direction, provided with a second vibration body which is disposed at the central portion of the vibration body and which has appropriate rigidity and is lighter than the first vibration body. Circle 1 (formed in an r shape, characterized in that it has a bottomed hollow portion in which the diameter of one 52 on the front side in the sound emission direction is enlarged and the other end is reduced in diameter and closed. Do. In the speaker device according to the present invention, in the low to middle range, the first two-foot vibrator vibrates mainly, and in the middle to high range, the second vibrator mainly vibrates, and the second vibrator The vibration of 5 kl (a characteristic of emphasizing the range of z or more is realized. G. Examples Hereinafter, specific examples of the present invention will be described with reference to the drawings. This embodiment shows an example in which the present invention is applied to a so-called flat speaker. The speaker device according to the present invention, as shown in FIG. 1, includes a magnetic circuit portion 3 mainly composed of a yoke plate 1 and a magnet 2 and a vibrator at a predetermined position relative to the magnetic circuit portion 3. A flat diaphragm 5 supported by the support frame 4 and serving as a first vibrating body, and a conical vibrating body 6 serving as a second vibrating body disposed at the central portion of the flat diaphragm 5 are configured as main components. And the vibrating portion 7. In the 6n pneumatic circuit portion 3, an annular magnet 2 is mounted coaxially with the projecting portion 1a on one surface of the yoke plate 1 made of a high permeability material provided with a projecting portion 1a at the central portion on the-surface side. An annular plate 8 is mounted on the magnet 2 and configured. The inner surface of the insertion hole 8a provided at the central portion of the plate 8 is opposed to the outer surface of the projecting portion 1a of the yoke plate 1 at a predetermined distance to form an annular magnetic gap 8b. The plane vibration plate 5 constituting the vibrating portion 7 is made of a material of high rigidity, is formed in a rectangular shape having a predetermined thickness and size (for example, -100 to side of side, about 10 mm), There is provided a circular opening 5a of a diameter of. The circular vibrator 11 is fitted in the opening 5a, and the conical vibrator 6 has a flange 6a formed on the outer peripheral surface on one end side which is the front side in the sound emitting direction. It is attached to the periphery of The conical vibration body 6 is formed of a material having an appropriate rigidity, for example, a material such as RJ polystyrene, foam polystyrene, foam mylar or the like so as to be lighter than the flat diaphragm 5. The circular ft-shaped vibrating member 6 is formed in a substantially conical shape in which the diameter is increased by 1i and the diameter is gradually reduced toward the proximal end, and the-end side is expanded in diameter and opened inside thereof. It has a so-called horn-shaped bottomed hollow portion 6b closed with a diameter reduction at the other end side. Then, the circle i (the vibrator 6 is joined to the flat diaphragm 5 so that the axial direction is perpendicular to the flat diaphragm 5 so that the axial direction of the cone is the vibration direction. . A cylindrical voice 11-05-2019 2 coil bobbin 9 is attached to the other end of the conical vibrator 6. A voice coil 10 is wound around the outer peripheral surface of the end of the voice coil bobbin 9. The voice coil bobbin 9 is connected to the flat diaphragm 5 via a compling diaphragm 11, which is a lightweight diaphragm made of paper, aluminum or the like. The vibrating body support frame 4 for supporting the vibrating portion 7 configured in this way at a predetermined position with respect to the magnetic circuit portion 3 is mounted on the plate 8. The opening on the distal end side of the vibrator supporting frame is substantially the same shape as the flat diaphragm 5, and is formed to a predetermined size so as to support the flat diaphragm 5 at a predetermined position. Are suitably bent so as to be attached to the plate 8. The peripheral edge portion of the flat diaphragm 5 is attached to the peripheral edge portion of the distal end side opening portion of the vibrator support frame 4 via an edge support member 12 made of a material having flexibility. Since the vibrating portion 7 is supported at a predetermined position, the end of the voice coil bobbin 9 on which the voice coil 10 is wound is inserted into the magnetic gap 8 b. The voice coil bobbin 9 is connected to the vibrator support frame 8 through a damper 13 made of a flexible material for preventing the vibration of the vibrator 7. When the speaker device according to the present invention configured as described above is driven by supplying a drive current to the voice coil 10, the planar vibrations Fi and 5 mainly suppress the split vibration in the low to mid range and the piston The conical vibration body 6 vibrates mainly in the high frequency range of 5 kHz or higher. Therefore, the mass of the vibration system in the high range is lighter than the vibration system in the low to middle range, and since the conical vibrating body 6 has the shape as described above, As shown by A in FIG. 2, in particular, the frequency characteristic is improved at a frequency of 5 k Hz or more, and socalled crisp sound quality is obtained. Since the speaker device according to the present invention has the characteristics as described above, as shown in FIG. 3, by providing the acoustic reflection plate 14 having a predetermined shape facing the flat diaphragm 5, no It can be applied to a directional speaker device. The acoustic reflection (for example, the counter 14 is formed in a quadrangular pyramid from the four reflectors 14a, and is supported so that the apex of the quadrangular pyramid formed by the four reflectors faces the central portion of the circle SIL vibrator 6 Be done. The reflecting plate 14a is formed of a hard material so as to reflect sound efficiently. The sound emitted from the flat diaphragm 5 and the circular Sft-like vibrator 6 remains in the high sound pressure level after being reflected by the reflection plate 14a, but the speaker device according to the present invention Since the high frequency range has an emphasized characteristic, natural frequency characteristics are maintained even in the reflected sound. The sound emitted from the flat reflector 5 and the conical vibrator 6 is reflected by the reflectors 14a to change its direction to a substantially right angle as shown by the arrow S in FIG. In the speaker device configured in this way, if the flat diaphragm 5 is placed so as to be horizontal, the 11-05-2019 3 same frequency characteristics and sound pressure level can be obtained at any position around the speaker device. A non-directional speaker device. Further, as shown in FIG. 4, the speaker device according to the present invention may be configured using the conical vibrating body 15 without the above-mentioned buttocks. The conical vibrator 15 is made of the same material as the conical vibrator 6 and has a so-called horn-like bottomed hollow portion 15a similar to the bottomed hollow portion 6b. In this example, the conical vibrator 15 is fitted in the opening 5a, and an elastic emulsion adhesive or the like as a dumping material is used as a dump material between the conical vibrator 15 and the flat diaphragm 5. The first and second vibration units 7 are connected by an adhesive 16. As the adhesive 16, for example, 5C-801 (trade name; manufactured by Sony Chemical Co., Ltd.) can be used. In place of the adhesive 16, neobrene sponge or the like may be used. As described above, the speaker device according to the present invention includes the first vibrating body and the light-weight second vibrating body, and the second vibrating body is a cone whose axis is in the vibration direction. The one end side which is the front side in the sound emission direction is expanded in diameter and opened, and the other end side is closed and the bottom end is a closed hollow portion closed. Therefore, the first vibrating body mainly vibrates in the low to middle range, and the second vibrating body mainly vibrates in the high tone range. The vibration of the second vibrating body improves the characteristics of the high range, and in particular, the characteristics in which the range of 5 kllz or more is emphasized can be realized. The speaker device according to the present invention compensates for the above-mentioned characteristics to compensate for the sound pressure range of 5 kHz or more, which is smaller than the actual sound pressure level by a sound pressure level, and provides natural sound. Even in the case where the sound is expanded 1141 using a plate or the like, a good sound with little loss of the high range can be provided. [0002] Brief description of the drawings [0003] FIG. 1 is a longitudinal sectional view showing the configuration of the speaker device according to the present invention, FIG. 2 is a graph showing frequency characteristics of the above speaker device and the conventional speaker device, and FIG. 3 is an application of the above speaker device It is a perspective view which shows an example, FIG. 4 is a longitudinal cross-sectional view which shows the other structural example of the said speaker apparatus. FIG. 5 is a longitudinal sectional view showing the configuration of a conventional speaker device. 1 11-05-2019 4 ······································································································································································································· ··· Vibration body support frame 5 ···· ----- first flat diaphragm 6 which is a vibrating body ........ second vibrator to become conical vibrator 6a · · · · · · bottomed hollow portion 7 ... ·············· Vibration part 11-05-2019 5
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