WO2014146518A1

WO2014146518A1 - Tablet loudspeaker

Info

Publication number: WO2014146518A1
Application number: PCT/CN2014/071539
Authority: WO
Inventors: 中野雅树
Original assignee: 谭菊花
Priority date: 2013-03-20
Filing date: 2014-01-27
Publication date: 2014-09-25
Also published as: CN103618979A; CN103618979B

Abstract

The present invention relates to a tablet loudspeaker, comprising: a support framework. At least one sound producing unit is provided axially along the support framework, and each sound producing unit is formed of a planar vibrating membrane for emitting sound waves by vibration, a frame mounted along the periphery of the planar vibrating membrane, and a drive device for vibrating the planar vibrating membrane in response to a sound signal and an action; a non-contact space is provided on each of the two sides of a trench portion disposed on the support framework, the non-contact space is a chamfer provided on the bottom of the trench portion along the outer side and disposed on the support framework, and the frame mounted along the periphery of the planar vibrating membrane is adhered onto the trench portion disposed on the support framework. The present invention has desirable output frequency characteristics, can also be thinned at high input power, and transmits sound with forward directionality.

Description

Flat panel speaker

The present invention relates to a flat panel speaker.

Background technique

[0002] In recent years, in order to meet the demand for ultra-thinness of a television receiver or the like equipped with a horn, the horn has been required to be ultra-thin. For such ultra-thinning requirements. A conical horn that is about a hemispherical shape called a conical horn and a vibrating plate that outputs sound from the opening is difficult to cope with. The reason for this is that the conical horn has a smaller inner diameter of the cone for thinning the outer shape of the conical horn, and the sensitivity, particularly the sensitivity of the low range, is lowered. The conical horn emits sound from the opening in the inner surface of the cone of a hemispherical shape. Therefore, the sound output from the conical horn is very weak (direct directionality).

[0003] Japanese Patent Laid-Open Publication No. Hei 2 0 0 0 - 1 6 6 5 1 5 discloses a flat-panel horn for sensing the volume and the same in the midrange of 1 k Hz and the high range of 15 kHz. The sound of the volume of the level. Moreover, in order to output the sound in the low-range range of 150 Hz, the overall design of the flat-panel speaker has to be designed such that the vibrating plate is large and the amplitude can be made possible. Therefore, the flat horn disclosed by the invention document is difficult to achieve sufficient ultra-thinness while having good output frequency characteristics.

Summary of the invention

[0004] An object of the present invention is to provide a flat panel horn having good output frequency characteristics and sufficiently achieving ultra-thinning. The flat horn of the present invention comprises a support frame, characterized in that: at least one sounding unit is arranged axially along the support frame, and each sounding unit is composed of a plane vibration film that emits sound waves and a frame body installed along the periphery of the plane vibration film. And a driving device for vibrating the planar diaphragm according to the action of the sound signal, wherein at least one pair of non-contact spaces are provided on the side of the grooved portion formed on the support frame, and the non-contact space is opened on the support frame A chamfer on the bottom surface of the grooved portion along the outer side, and a frame mounted along the periphery of the planar diaphragm is bonded to the grooved portion formed on the support frame. The non-contact space on the two sides of the grooved portion formed on the support frame is symmetrically distributed according to the center of the driving device. The method is characterized in that: the plurality of sounding units are plural. The planar diaphragm is characterized by a short strip shape. The planar diaphragm is circular in shape. The planar diaphragm is characterized by a polygonal shape. The frame is characterized by a metal or a hard material. The utility model is characterized in that: the driving device is composed of a permanent magnet mounted on York and a coil wrapped around the magnet, the coil is wound on a coil support body, and there is a gap between the coil support body and the permanent magnet, and the coil support body The suspension joint is attached to the flat diaphragm by a suspension joint, and the suspension joint is matched with the top end of the coil support, and York is located in the recess of the bottom surface of the support frame. It is characterized in that the coil axis of the coil is the center of the drive unit. Its The utility model is characterized in that: a magnetic strong iron plate is connected to the upper end of the permanent magnet. It is characterized in that the non-contact space is filled with a material having a soft property. The utility model is characterized in that: at least one through hole and positive and negative terminal blocks are arranged corresponding to each sounding unit on the support frame. It is characterized in that: the planar diaphragm is composed of a light and thin material. The utility model is characterized in that: the chamfer angle is an inner groove on the bottom corner of the grooved portion opened on the support frame, and the inner groove has a rectangular cross section. It is characterized in that: the inner groove has a height of at least 1 mm.

[0005] An advantage of the present invention is that since the support frame is provided with a non-contact space, the support frame supports the planar diaphragm in the vibration range and is released from the fixed restriction action, the frame and the plane diaphragm can be combined together The vibration then outputs a sound. Therefore, for a flat panel speaker, the corresponding sound signal can expand the vibration range. Therefore, it is possible to output a highly sensitive sound without increasing the amplitude of the flat diaphragm. This effect is especially noticeable in the sound output for the low range. Further, since it is not necessary to enlarge the amplitude of the planar diaphragm, it is possible to achieve ultrathinness of the flat horn. When the plane vibration film is in the shape of a short strip, the overall configuration of the flat horn is a short strip shape. Therefore, it is easy to mount on the peripheral part of other equipment such as a television set. When the non-contact spaces are respectively disposed at the symmetrical positions with respect to the arrangement center of the driving means, the planar diaphragms corresponding to the non-contact spaces and the imbalance of the respective sounds outputted from the housing are well controlled, and the conventional type speakers are realized. Difficult high power can effectively control the deterioration of sound quality. When the frame is made of metal, the function of releasing the heat generated by the inside of the flat horn is realized, and the internal temperature rise of the flat horn can be effectively controlled. When the non-contact space is filled with a soft material, the frame and the frame are The vibration and amplitude of the planar diaphragm can be controlled for the desired purpose.

DRAWINGS

1 is a schematic view showing a configuration of a flat panel speaker according to an embodiment of the present invention, and showing a configuration example of two sound emitting unit output systems.

2 is a plan view of the flat horn shown in FIG. 1.

3 is a schematic bottom view of the flat horn shown in FIG. 1.

4 is a schematic cross-sectional view taken along line IV-IV of FIG. 2.

5 is a partial perspective view of the vibrating membrane provided with the coil support of the present invention as seen from the inside. FIG.

6 is a plan view schematically showing a configuration example of a support frame of the present invention.

7 is a schematic cross-sectional view taken along line VII-VII of FIG. 6.

8 is a schematic cross-sectional view taken along line VIII-Vim of FIG. 6.

9 is a schematic perspective view of a main portion of a support frame of the present invention.

10 is a schematic explanatory diagram showing an output frequency characteristic of a flat panel speaker according to an embodiment of the present invention.

11 is a plan view schematically showing a plane diaphragm of an example of sound output in one sounding unit of the present invention. 12 is a schematic plan view showing a planar sounding film of a sound output example in three sound emitting units according to the present invention.

13 is a schematic plan view showing a planar sounding film of a sound output example in four sounding units according to the present invention.

14 is a plan view schematically showing a diaphragm used in a circular flat horn according to the present invention.

15 is a plan view schematically showing a diaphragm used in an octagonal flat plate horn according to the present invention.

detailed description

[0021] The flat horn includes a support frame, and is characterized in that: at least one sounding unit is disposed axially along the support frame, each sound absorbing unit is composed of a plane vibration film that emits sound waves and a frame body installed along a circumference of the plane vibration film. And a driving device for vibrating the planar diaphragm according to the action of the sound signal, wherein at least one pair of non-contact spaces are provided on the side of the grooved portion formed on the support frame, and the non-contact space is opened on the support frame A chamfer on the bottom surface of the grooved portion along the outer side, and a frame mounted along the periphery of the planar diaphragm is bonded to the grooved portion formed on the support frame. The feature is that the non-contact spaces on the two sides of the grooved portion formed on the support frame are symmetrically distributed according to the center of the driving device. The method is characterized in that: the plurality of sounding units are plural. The planar diaphragm is characterized by a short strip shape. The planar diaphragm is circular in shape. The planar diaphragm is polygonal in shape. The frame is characterized in that the frame is made of a metal or a hard material. The utility model is characterized in that: the driving device is composed of a permanent magnet mounted on York and a coil wrapped around the magnet, the coil is wound on a coil support body, and there is a gap between the coil support body and the permanent magnet, and the coil support body The suspension joint is attached to the flat diaphragm by a suspension joint, and the suspension joint is matched with the top end of the coil support, and York is located in the recess of the bottom surface of the support frame. It is characterized in that the coil axis of the coil is the center of the drive unit. The utility model is characterized in that: a magnetic strong iron plate is connected to the upper end of the permanent magnet. It is characterized in that the non-contact space is filled with a material having a soft property. The utility model is characterized in that: at least one through hole and positive and negative terminal blocks are arranged corresponding to each sounding unit on the support frame. It is characterized in that: the planar diaphragm is composed of a light and thin material. The utility model is characterized in that: the chamfer angle is an inner groove on the bottom corner of the grooved portion opened on the support frame, and the inner groove has a rectangular cross section. It is characterized in that: the inner groove has a height of at least 1 mm.

[0022] Hereinafter, an embodiment of the tablet horn 10 relating to the present invention will be described based on the drawings.

[0023] First, a configuration example of the flat panel speaker 10 in which two sound output systems are installed will be described with reference to Figs. 1 to 4 .

[Overall Configuration]

The flat panel speaker 10 is a planar vibrating membrane 11 that emits sound waves by vibration, a housing 12 that is mounted along the periphery of the vibrating membrane 11, a driving device that operates in response to an acoustic signal, and the vibrating planar vibrating membrane 11 and the mounting and the housing 12 cooperate with each other. The support frame 13 of the planar diaphragm 11 is fixed.

(planar diaphragm) As shown in FIG. 2 and FIG. 4, the plane diaphragm 11 is formed in a rectangular shape in plan view in the plane direction of the plate horn 10.

(short strip shape) having a shape in which the grooved portion 13h of the support frame 13 described later is fitted and supported.

The material properties suitable for the planar diaphragm 11 are not particularly limited, and for example, low density polyethylene or the like can be used. Further, the planar diaphragm 11 can use a suitable layered material, and the sound quality output from the tablet speaker 10 can be adjusted according to the combination of the layered materials. Further, heat resistance and shrinkage strength can be improved by using a material having a low shrinkage property and a layered material of a flame retardant (very low shrinkage) raw material in the planar diaphragm 11.

Further, it is preferable to use a lightweight raw material as the planar diaphragm 11, and the output efficiency of the flat horn 10 can be improved. Further, the flat diaphragm 11 is preferably made of a material having extremely low stretchability and excellent heat resistance and cold resistance (e.g., 40 to 120 ° C and usable). In addition, the flat vibrating film 11 is made of a material suitable for various environments such as raw materials, adhesive materials, and flame-resistant materials that are easy to reuse and easy to recycle. A flat diaphragm 11 with various characteristics or styles is realized.

Further, it is preferable that the planar diaphragm 11 is made of a material having a flat surface, and according to the material, the linearity (directivity) of the output sound of the flat horn can be improved, and a part of the planar diaphragm 11 can be well controlled ( For example, the portion where the concave shape is formed) the distortion of the output sound and the sound of the other portion (for example, the portion formed with the convex shape) interfere with the sound cancellation.

(frame)

The frame 12 is made of a metal material such as a thin plate-shaped aluminum or stainless steel, or a resin. It is more rigid than the planar diaphragm 11 and is attached to the inner peripheral edge along the peripheral edge of one side of the planar diaphragm 11 to form an annular shape. This frame body 12 is joined to the groove portion 13h of the support frame 13 to grip the peripheral edge portion of the plane diaphragm 11, and is attached and fixed to the grooved portion 13h of the plane diaphragm 11. Therefore, the width of the frame 12 is set to be about the same length as the width of the groove portion 13h of the entire circumference. The length of this portion is not specifically limited.

[0030] (Support Framework)

In the present embodiment, the driving means described later in the support frame 13 are formed to accommodate a total of two positions on both sides of the center position in the longitudinal direction. Since the corresponding elements are identical to each other, only the driving device on the corresponding side will be described.

6 to 9 show a support frame 13 before assembly of the planar diaphragm 11, and a bottom box-shaped body 13a having a long longitudinal direction and a mounting flange 13b formed by the opening periphery of the body 13a. Further, the main body 13a has a bottom surface 13f and an inner side surface of the mounting flange 13b, and the flat vibrating film 11 of the mounted frame 12 is fitted and pasted to the entire circumference. A recess 13g is provided on the bottom surface 13f, and the metal york 41 of the driving device is provided on the recess 13g. Further, the support frame 13 having a ^three- word cross section houses the components of the driving device described later. [0032] As shown in FIG. 6, at the grooved portion 13h of the mounting flange 13b, a chamfering angle 13i corresponding to the vibration range of the planar diaphragm 11 and then the downwardly facing space portion (non-contact space) is formed. . Accordingly, a non-contact space is formed between the chamfered corner 13i and the planar diaphragm 11 and the frame 12. Further, a support range is formed according to the grooved portion 13h. As shown in Fig. 6 and Fig. 8, the vibration range of the corresponding plane diaphragm 11 is the chamfer angle 13i, and more specifically the symmetry about the arrangement center C of the drive device (refer to Fig. 2, for example, the axis of the coil of the coil 43). The mounting flange 13b is mounted on each side of each drive unit. Further, at each of the chamfering angles 13i and the plane diaphragm 11, it is ensured that there is sufficient non-contact depth. For example, at least 1 mm is formed from the grooved portion 13h to a space cut down below.

[0033] The suspension joint 50 preferably employs a resin having high heat resistance. This resin or the like is bonded to the plane diaphragm 11 with a double-faced bonding cloth coated with an acrylic series adhesive having high adhesion. Therefore, the suspension joint 50 has a function of electromagnetic force generated in response to a change in the current supplied to the coil 43, which has a function of being transmitted to the plane diaphragm 11 via the coil support 44.

Further, the suspension joint 50 has a function of transmitting heat transmitted from the coil 43 to the coil support body 44 to the plane diaphragm 11, and discharging it outward through the frame 12 or the support frame 13.

[Drive device]

As shown in FIG. 4, the driving device (driving circuit) which is accommodated in the inside of the support frame 13 and which operates the vibration plane diaphragm 11 in response to the sound signal includes a cup-shaped metal york which has a U-shaped cross section and looks like a circular oblong shape. 41. A permanent magnet 42 for supporting a magneto-shaped iron plate 45 having a long disk shape, a long cylindrical coil support 44 having a shape similar to that of the ferromagnetic plate 45 and the magnet 42, and an outer peripheral surface of the coil support 44 The coil 43 of the coil is formed.

The bottom surface 13f of the support frame 13 (see Figs. 7 to 9) is provided with a recess 13g as described above, and a metal York 41 is fitted in the recess 13g. A magnet 42 that accommodates a permanent magnet having a long cylindrical shape at the inner center of the metal York is fixed to the metal York 41 by a bolt (not shown). Further, the magnet 42 is disposed between the inner side wall surface 41a of the metal york 41 and the side wall surface 42a of the side wall surface 42 of the rectangular parallelepiped magnet 42 so as to have a certain gap therebetween, and is disposed at a position inside the metal york 41.

Further, a magnetic strength iron plate 45 is placed and fixed on the upper surface 42b of the magnet 42. The side surface of the ferromagnetic iron plate 45 is disposed at a certain distance from the inner side wall surface 41a of the metal York 41. The magnetized iron plate 45 and the magnet 42 are connected by magnetic gas.

Thus, in this example, a magnetic gas circuit is formed between the inner wall surface 41a of the metal York 41, the ferromagnetic iron plate 45, and the magnet 42. Further, a gap is provided between the inner wall surface 41a of the metal York 41 and the inner wall surface 42a of the magnet 42 and the ferromagnetic iron plate 45. The coil support 43 of the coil support 44 is placed at a predetermined position of the gap.

[0039] As shown in FIG. 5, the coil support body 44 has a hollow cylindrical shape along the inner wall surface 41a of the metal York 41 on the outer peripheral surface. The coil 43 is wound around the outer peripheral surface of the coil support 44 as shown in FIG. And as shown in Figure 4 and Figure 5, the root The coil support 44 is attached to the suspension joint 50 attached to the lower surface ib of the plane diaphragm 11, and the coil 43 is placed at a predetermined position of the gap.

[0040] However, the coil 43 is wound along the outer peripheral surface of the coil support body 44. Further, the front end portion of the coil 43 is electrically connected to the positive terminal 13d shown in Fig. 3. The other end portion is electrically connected to the negative terminal 13e shown in Fig. 3. Further, the current corresponding to the sound signal in the coil 43 is supplied through the positive terminal 13d and the negative terminal 13e. The positive electrode terminal 13d and the negative electrode terminal 13e are electrically connected to a current supply circuit (not shown). The current corresponding to the sound signal in the coil 43 is supplied through the positive terminal 13d and the negative terminal 13e.

[0041] If current is supplied to the coil 43, the coil 43 generates an electromagnetic force on the magnetic boundary between the inner side surface 41a of the metal york 41 and the ferromagnetic iron piece 45. The electromagnetic force generated by the coil 43 also changes in response to a change in the supply current. Further, in response to a change in the current of the supply coil 43, the electromagnetic force generated by the coil 43 also changes and the sound is output by vibrating the planar diaphragm 11 by the suspension joint 50.

[assembly]

As described above, the planar diaphragm 11 to which the coil 43 is mounted is assembled by the coil support 44 and the suspension joint 50 on the support frame as follows.

Further, the peripheral edge portion of the planar diaphragm 11 to which the frame 12 is attached can be divided into a support range which is fixed to the support frame 13 as will be described later and a vibration range in which the frame 12 can vibrate.

[0044] In the grooved portion 13h of the support frame 13, the mounting surface of the frame 12 is fitted to the flat diaphragm 11 as an outer side, and is bonded by a double-sided adhesive cloth. That is, in the lower periphery of the plane diaphragm 11 in the periphery of the ib, the support range is stuck to the groove portion 13h of the support frame 13, but the vibration range of the opposite chamfer 13i is not attached to the support frame. The plane diaphragm 11 is freely vibrated together with the frame 12 without being restrained by the support frame 13.

Further, if the depth of the vibrating surface chamfer angle 13i to be mounted is shallow, the peripheral portion of the planar vibrating membrane 11 interferes with the bottom surface of the chamfer 13i depending on the vibration when the planar vibrating membrane 11 outputs sound, and the sound quality may be impaired. Therefore, the chamfer angle 13i should be set to a suitable depth corresponding to the sound output of the flat panel speaker 10. Further, in the vibration range of the planar diaphragm 11, it is not suitable to be in contact with the grooved portion of the support frame 13, and the vibration is restricted. Therefore, in the vibration range, the side contact with the grooved portion of the support frame 13 restricts the vibration to be poor. Therefore, in order to prevent the plane diaphragm 11 and the grooved portion 13h from interfering in the vibration range, a gap is ensured between the plane diaphragm 11 and the grooved portion 13h.

[0046] The length of the chamfer 13i (i.e., the length of the cut-away length of the support frame 13) also affects the sound quality of the output sound of the flat panel speaker. Therefore, the length of the coil support 44 in the longer direction is set to an appropriate length together with the gap between the coil 43 and the metal York 41.

[effects] At the periphery of the planar diaphragm 11, the range of vibration that is not in contact with the mounting frame 13 is provided. The ratio of the area of the plane diaphragm 11 as the range of the output sound can be actually expanded on the plane 10a of the flat panel speaker 10. Further, the amplitude of the area of the movable diaphragm 11 is actually expanded, so that the amplitude of the planar diaphragm 11 can be prevented from increasing. At least the sensitivity of the low range can be improved on the output sound, and at least the sound playback function of the low range can be improved.

[0048] A raw material such as a metal material or a resin which is more rigid than the planar diaphragm 11 is used on the frame 12. The frame body 12 vibrates together with the plane diaphragm 11 in accordance with the vibration range in the periphery of the plane diaphragm 11, so that the sound can be output as a tweeter in the high range. The sound output of the supplementary plane diaphragm 11 can be realized. Further, when the casing 12 is made of a metal material, the function of radiating heat generated inside the flat horn 10 to the outside is realized. The rise in the internal temperature of the flat panel speaker 10 can be well controlled.

As shown in FIGS. 2 and 4, the frame body 12 and the planar diaphragm 11 extend along the outer plane 11a of the flat horn 10. Therefore, the sound output from the planar diaphragm 11 and the sound output from the vibration range of the casing 12 are emitted in the same direction. Therefore, the sound quality reduced by interference can be well controlled. Achieve less distorted sound output.

The casing 12 realizes the sound output by the vibration of the vibration range, and the sound of the corresponding sound signal vibration of the flat panel speaker 10 can be expanded as compared with the case where only the plane vibration film 11 outputs the sound. Therefore, it is not necessary to enlarge the amplitude of the plane diaphragm 11, and it is possible to output sound with high sensitivity at least in the low range. Therefore, at least the sound output capability of the low range can be improved. Further, since it is not necessary to enlarge the amplitude of the planar diaphragm 11, even when a large current is input to the coil 43, the lower end of the coil support 44 or the contact of the coil 43 with the inner bottom surface of the metal York 41 can be well controlled. The abnormal sound generation phenomenon can also achieve ultra-thinness of the flat panel speaker 10.

The depth and the length of the chamfer 13i are appropriately set on the support frame 13, and the peripheral edge is attached to the support range of the planar diaphragm 11 on the grooved portion 13h of the support frame 13, thereby limiting the waste of the amplitude. It is possible to achieve a very good limitation of the amount of air discharged from the back side of the flat horn 10 (the inner side of the plane 10a) and the amount of air that flows in.

[0052] In the conventional flat-panel horn described in the Japanese Patent Publication No. 2 0 1 0 - 1 6 6 5 1 5, even if the flat horn is thinned, it is necessary to deal with the air vibration on the back side. space. Specifically, when a conventional flat-panel speaker is provided, the back side has to be separated from the wall by a predetermined distance. Further, when such a flat-panel horn is mounted on another machine, it is difficult to handle the air vibration on the back side of the flat horn, and it is difficult to achieve ultra-thinness of the machine.

In the flat horn 10 of the present embodiment, the amount of air discharged from the through holes 13k and 131 on the back side of the flat horn 10 (the back side of the plane 10a) and the amount of inflowing air are well limited. Therefore, when the flat panel speaker 10 is provided, the distance from the wall surface on the back side can be made shorter than that required for the conventional flat panel speaker. In addition, when the flat panel speaker 10 is mounted on another device, the volume of the space provided to process the air on the back side of the tablet speaker 10 is It can make it smaller than the previous flat-panel speakers. Moreover, the burden of reducing the design or style design of the machine can be achieved while reducing the burden on the designer of the machine.

Further, on the grooved portion 13h of the chamfering angle 13i (the lower surface ib of the plane diaphragm 11), a material having a soft property (a rubber series, a polysiloxane type, a sponge series, or the like) may be disposed as needed. Further, the soft raw material can be attached to at least one of the grooved portion 13h of the chamfer 13i and the lower surface of the diaphragm 11i. According to such a configuration, the size or type of the material having a soft property is appropriately selected in consideration of the sound quality of the flat horn 10, and the control of the plane vibration film 11 and the vibration and amplitude of the frame 12 is desired.

(output input characteristics)

The output input characteristics of the tablet speaker 10 of the present embodiment will be described. The outer dimensions of the flatbed speaker 10 of the present embodiment are, for example, 220 m long, 22 m high, and 9.5 m wide (deep) when two driving devices are mounted. The rated input power is 15 W, the maximum input power is 25 W, the rated impedance is 8.0 Ω, and the output sensitivity level (SPL) is 84 dB ± 3 dB (500 Hz, 700 Hz, 1 kHz, 4 kHz, 5 kHz 1 W (2.83 V, 0.5 m).

As shown in FIG. 10, the sound output frequency characteristic of the flat panel speaker 10 of the present embodiment gradually increases from the low frequency range of about 150 Hz. It includes a midrange from about 250 Hz to 1 kHz and a high range of about 6,000 Hz, which is roughly stable in the range of ±5 dB. The actual audible range is 200Hz to 20,000Hz.

Therefore, the flat panel speaker 10 of the present embodiment has stable output sensitivity and a sufficiently high sound quality characteristic in a wide range from the low range to the high range.

Here, the flat-panel horn relating to the present invention can realize a sound output system in which a plurality of sound-emitting units are assembled for one planar diaphragm. As shown in Figs. 1 to 10, in the above embodiment, two sets of sound output device systems of the sounding unit are formed. The sound output is achieved, for example, by the sounding unit output machine system on the one hand and the sounding unit output machine system and the two channels on the other hand.

(Modification)

Fig. 11 is a view showing an example of sound output (monophonic sound output) of one sounding unit.

[0060] As shown in FIG. 11, the planar diaphragm 11 is formed into a short strip shape and has one sound output system (only the coil support 44 of the same system is indicated by a broken line, the same applies hereinafter), and is used on the flatbed speaker 10. . The reference numerals used in the above embodiments and the components having the same reference numerals are basically the same as those in the above-described embodiments. Since it is easy to understand, the detailed explanation is omitted.

[0061] A support range of the planar diaphragm 11 is fitted to the grooved portion 13h of the support frame (not shown in FIG. 11). Further, a vibration range substantially equal to the plane diaphragm 11 is disposed on the grooved portion 13h along a symmetrical position (a range indicated by oblique lines) about the center C of the longer direction driving means of the coil support 44. In this position and the foregoing In the same manner as in the embodiment, a chamfer angle 13i that can vibrate the casing 12 together with the plane diaphragm 11 is attached.

In the modification shown in Fig. 11, since one sounding unit output system is assembled to one support frame, a flat panel speaker which is inexpensive and has the effects of the present embodiment can be realized.

12 is a diagram showing a modification of the output system sound output of the three sound emitting units. As shown in the example of Fig. 12, the plane diaphragm 11 is formed into a short strip shape, and an output system having three sounding units is used for the flat horn 10.

Further, the support range of the diaphragm 11 is fitted to the grooved portion 13h of the support frame (not shown in Fig. 12). Further, the vibration range of the planar diaphragm 11 is disposed on the grooved portion 13h along a symmetrical position (a range indicated by oblique lines) about the center C of the longer direction driving means of the coil support 44. At this position, a chamfer 13i which can vibrate the frame 12 together with the plane vibration film 11 is separately provided.

[0065] In the modification shown in FIG. 12, since three sound emitting unit output systems are assembled by one support frame, each sound emitting unit output machine system can achieve the effects of the foregoing embodiments, and can be realized according to the left channel and the middle channel. And the sound output of the 3 channels of the right channel.

13 is a diagram showing a modification of the sound output of the 4-voice unit output system. As shown in the example of Fig. 13, the plane diaphragm 11 is formed into a short strip shape, and four sound output systems are provided for use on the flat panel speaker 10.

Further, a support range of the diaphragm 11 is fitted to the grooved portion 13h of the support frame (not shown in Fig. 13). Further, on the grooved portion 13h, the vibration range of the plane diaphragm 11 is disposed at a symmetrical position (a range indicated by oblique lines) with respect to the center C of the longer direction driving means of the coil support 44. At this position, as in the above-described embodiment, the chamfering angle 13i which causes the frame 12 to vibrate together with the plane vibration film 11 is attached.

[0068] According to a modification shown in FIG. 12 and a modification shown in FIG. The assembled driving means of the sound emitting unit output machine system respectively vibrates the plane diaphragm 11, so that the current supplied to each driving device can be made small. Therefore, the amplitude of the planar diaphragm 11 is made small, and the flat horn is further thinned.

Further, according to the modification shown in FIG. 12 and the modification shown in FIG. The output of different sounds can be realized by supplying currents corresponding to different sound signals to the respective driving devices of the assembled sounding unit output machine systems. Since the sound outputted by the flat panel speaker is linear, the output without interference can be made to a distant place according to the sound output from each driving device.

[0070] Moreover, as shown in the modification shown in FIG. 11, a sounding unit output machine system can be assembled on one support frame, and it can be configured to output with a mono sound. When a plurality of sound emitting units are output to the machine system, the same sound is output from the sound emitting unit outputting the system, and the mono sound output can also be configured.

[0071] FIG. 14 is a view showing a modification of the use of a circular planar diaphragm 11 . In this modification, 13h in the support frame

(not shown in Fig. 14) The support range in which the circular diaphragm 11 is fitted and bonded is fitted. And in the ditching part The center C of the upper driving device on 13h (the range indicated by the oblique line) is disposed at a symmetrical position with the vibration range of the planar diaphragm 11. At this position, a chamfer angle 13i that causes the frame body 12 to vibrate together with the plane diaphragm 11 is attached.

Further, as shown in Fig. 14, in the present modification, the casing 12 is mounted along the inner periphery of the circular planar diaphragm 11. The shape of the planar diaphragm 11 is not limited to a true circular shape, and may be other shapes such as an elliptical shape.

Fig. 15 is a view showing a modification of the plane diaphragm 11 using an octagonal shape. In the present modification, the support range of the octagonal diaphragm 11 is fitted to the support frame 13h (not shown in Fig. 15). Further, the vibration range of the plane diaphragm 11 is disposed at a symmetrical position with respect to the center C of the driving device (the range indicated by the oblique line) on the grooved portion 13h. At this position, as in the above-described embodiment, a chamfer 13i which can vibrate the casing 12 together with the diaphragm 11 is provided.

Further, as shown in Fig. 14, in the present modification, the casing 12 is mounted along the inner periphery of the circular planar diaphragm 11. Also, the shape of the planar diaphragm 11 is not limited to the octagonal shape. More polygons than 8 vertices are also available. Other polygons with fewer than 8 vertices are also available. In addition, it may be a regular polygon shape, and may not be a regular polygon shape.

[0075] Moreover, as shown in FIG. 14 or as shown in FIG. 15, the chamfering angle 13i of the support frame is, for example, related to the configuration center C of the driving device, and the symmetrical range is set (as shown in FIG. 14 is symmetrical within 90 degrees). range). According to this configuration, the unevenness of the plane diaphragm 11 corresponding to each of the chamfers 13i and the sound output from the casing 12 is well controlled. It can achieve good control of the deterioration of sound quality.

Claims

Claim

A flat panel speaker, comprising a support frame, characterized in that: at least one sounding unit is disposed axially along the support frame, each sounding unit is composed of a plane vibration film that emits sound waves and a frame body mounted along a periphery of the plane vibration film and The driving device of the planar diaphragm is vibrated by the action of the sound signal, and at least one pair of non-contact spaces are provided on the side of the grooved portion formed on the support frame, and the non-contact space is opened on the support frame. A chamfer on the bottom side of the grooved portion along the outer side, and a frame mounted along the periphery of the planar diaphragm is bonded to the grooved portion formed on the support frame.

The flat horn according to claim 1, wherein the non-contact spaces of the two side edges of the grooved portion formed in the support frame are symmetrically distributed according to the center of the driving device.

3. The tablet speaker according to claim 1, wherein: said sounding unit has a plurality of sounding units.

4. The flat panel speaker according to claim 1, wherein: said planar diaphragm is in the shape of a strip.

The flat panel speaker according to claim 1, wherein the planar diaphragm is circular.

The flat horn according to claim 1, wherein the planar diaphragm is polygonal.

7. The flat panel speaker according to claim 1, wherein the frame body is made of a metal or a hard material.

The flat horn according to claim 1 or 2, wherein: the driving device is a permanent magnet mounted on York and a coil disposed around the magnet, and the coil is wound on a coil support body. There is a gap between the coil support and the permanent magnet. The coil support is pasted by a suspension joint and a planar diaphragm. The suspension joint is matched with the top end of the coil support, and York is located in the recess of the bottom surface of the support frame.

9. The tablet horn of claim 2 wherein: the coil axis of the coil is the center of the drive.

10. The flat panel speaker according to claim 8, wherein: a magnetic strength iron plate is connected to the upper end of the permanent magnet.

The flat horn according to claim 1 or 2, characterized in that the non-contact space is filled with a material having a soft property.

12. The flat panel speaker according to claim 1, wherein: at least one through hole and positive and negative terminal blocks are disposed on each of the sound emitting units on the support frame.

13. A flat panel loudspeaker according to any of claims 1 or 4 or 5 or 6, wherein the planar diaphragm is comprised of a lightweight material.

14. The flat horn according to claim 1, wherein: said chamfer is an inner groove on a bottom corner of the grooved portion formed on the support frame, and the inner groove has a rectangular cross section.

15. The tablet horn of claim 1 wherein: said inner recess has a height of at least 1 millimeter.