JPS59501091A - Electroacoustic transducer with diaphragm and blank for diaphragm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Blanks for electroacoustic transducers and diaphragms with diaphragms Technical field The present invention generally relates to an electroacoustic transducer with a diaphragm and a diaphragm. In particular, regarding the blank for substantially planar vibration to significantly increase performance The present invention relates to an electroacoustic transducer with a plate and a blank for a diaphragm.

Technology background To date, various types and types of electroacoustic transducers have been proposed. There is. Such a transducer can be used, for example, as a loudspeaker or a microphone. It is. Both are equipped with a movable diaphragm (diaphragm), and the diaphragm interacts with the surrounding atmosphere and generates or is actuated by sound waves . As will be apparent to those skilled in the art, the present invention provides a related to both transducers. However, for the sake of brevity, Only the peaker will be explained.

Due to the conical shape of conventional conical speakers, the sound emitted from them is distorted. Ru. Such distortion is known as the "indentation effect." Speaker cone (yen) The sound propagated from a cone (cone) cannot be emitted uniformly from its surface.

This is because the sound waves emitted from the center of the cone are not emitted from the periphery of the cone. This is because they are out of phase with the sound waves that are transmitted. The latter sound wave originates from the center of the cone. The distance traveled from the diaphragm to the listener's ears is shorter than the sound waves emitted from the diaphragm.

Various speaker structures have been proposed in the past, and some of them are , has been designed in a manner that attempts to overcome this problem. For example, the United States Patent Nos. 3,164,686, 3,171,904, 3,922,504, 959,512, 3,997,739, 4,056,697 and 4, 276, 4.49.

U.S. Pat. No. 3,171,904 discloses that in use the entire surface is covered by substantially the same distance. loudspeaker vibration having a substantially planar or flat surface so as to move in a vibratory manner; It has a diaphragm designed to eliminate distortion by providing a plate. Discloses a speaker that This patent claims that virtually all of the output from the speaker Attempts have been made to bring the sound waves in phase with each other, thereby reducing distortion.

The speaker diaphragm described in U.S. Pat. No. 3,171,904 is relatively lightweight and It is constructed from expanded polystyrene. However, such materials does not have sufficient stiffness, so its high frequency response makes it difficult to use in many applications. It is completely unsatisfactory.

An electric voice coil is embedded in the foamed styrene diaphragm to interact with the magnetic field. has been done. The diaphragm has a series of grooved slots defining a series of protrusions. The tip is formed into a solid block of polystyrene material υ, at the tip of each protrusion. A voice coil conductor is provided.

This conductor cooperates with the magnet assembly to excite the diaphragm. However, the weight of the diaphragm to reduce the amount to an acceptable level and use appropriate axotinone. Only one voice coil conductor is provided on each protrusion to allow the attachment of . However, such a single conductor may not be efficient enough for some applications. It does not exhibit sufficient resistance characteristics. In such a structure, an additional conductor should be provided. Adding additional conductors is not possible as there is little free space available. It is difficult, if not impossible. Moreover, such structures are very expensive to manufacture. It takes a lot of work.

To obtain good high frequency response, U.S. Patent No. 3,171,904 In the case of the disclosed speaker diaphragm, in order to provide sufficient electromagnetic energy, and much more in a given area to obtain the desired impedance. It may be necessary to provide a conductor. By the way, the current industry standard resistance value is When adapted to an amplifier, it is 4 to 8 Ω.

Or, alternatively, the diaphragm of the above US patent may be used as a diaphragm unit of similar dimensions on other machines. connected in series with the It can also be done. However, such a configuration is extremely It will be completely unsatisfactory. This is because the number of speaker diaphragms connected in series is This is because there will be too many people to bear. The only alternative in this case is to use appropriate resistance. To set up a resistor would be connected electrically in series with the voice coil. death However, such solutions are usually not preferred. Sozeju et al. Antibodies simply dissipate electrical signals without using them, and therefore This is because the operating efficiency of speakers is not very high. Well, connect the resistors in series. If one diaphragm unit fails, the entire unit will malfunction. . Additionally, an additional diaphragm connected in series can increase the bulk and size of the speaker system. significantly increases the size and weight, and therefore the cost is prohibitive for most applications. As such, such a configuration is extremely unsatisfactory for many applications.

On the other hand, perhaps the most significant disadvantage of using expanded polystyrene as mentioned above is that would be the spongy, non-rigid properties inherent in the material. Such materials are suitable for high frequency It is not useful for conducting numbers.

U.S. Pat. No. 4,276,449 discloses that a thin sheet of film material is formed into elongated arcuate waves. Discloses a transducer diaphragm constructed by folding it into the shape of a shaped sheet. ing. Current-carrying conductors are placed on both sides of the film, with spaced apart permanent magnetic bars. The diaphragm is placed in the trough of the bent film diaphragm so as to extend between the diaphragms and the diaphragm.

However, the series of elongated top portions of this diaphragm renders the front surface uneven.

Therefore, such a diaphragm transmits substantially all of the sound waves it emanates from the sound waves. For the purpose of significantly reducing or eliminating distortion, It is not possible to achieve all the desired effects.

In addition, those elongated peaks and valleys are defined by excluding both side edges of the folded film. are bonded but supported in other ways, making them weak structures. It has become. Therefore, the valley and the conductor attached to it are aligned with the magnetic structure. It is not firmly positioned as such.

As a result, when the diaphragm moves rapidly relative to the magnetic bar, the valley may move laterally. Therefore, in some applications, current-carrying conductors located in the valleys of the diaphragm The desired precise magnetic interaction between the magnetic bar and the magnetic bar cannot be obtained.

Furthermore, the conductors are arranged out of phase with each other on both sides of the film. Therefore, when a thin film is folded, it may buckle or bend in an arched manner. Therefore, proper alignment of each conductor with respect to the gap between the magnetic bars can be obtained. I can't do it.

Therefore, when used as a loudspeaker, the distortion of the loudspeaker cannot be minimized. An electroacoustic transformer with a diaphragm that significantly reduces the It is highly desirable to provide a juicer. The diaphragm is lightweight enough. , it is necessary to accommodate a sufficient number of voice coil conductors to obtain good impedance characteristics. It must have the capacity to accommodate

Such a diaphragm maintains its conductor in proper force alignment with the magnetic structure during use. It must be substantially rigid to be able to hold the trench, making manufacturing costs comparatively Must be reasonable.

Disclosure of invention Therefore, the primary objective of the present invention is to significantly reduce transducer distortion and improve efficiency. New and improved electroacoustic transducers and devices that achieve accurate reproduction with efficient operation. The purpose of the present invention is to provide blanks for dams and diaphragms.

Another object of the present invention is to be relatively lightweight yet capable of accommodating a large number of conductors. , an electroacoustic transducer with a diaphragm that is inexpensive to manufacture and structurally robust. , and to provide a blank for such a diaphragm.

Briefly, the above and other objects of the present invention are to provide a movable oscillator in a generally flat configuration. Electroacoustic transducers with diaphragms and blanks for such diaphragms This is achieved by providing

This transducer diaphragm has a front surface and multiple, fin or vane shaped It also consists of a thin folded sheet of material with a protrusion projecting rearward. Each thrust At least one conductor portion is disposed at the base. Top with a thin support sheet that is essentially flat. It is attached to the folded sheet and forms the front surface of the diaphragm, as well as supplementing the folded sheet. Follow the rules. In a preferred embodiment of the invention, each of the protrusions has a length extending over its entire length. It is almost groove-shaped and consists of a pair of side parts and a central part that interconnects them. do.

In one embodiment of the invention, at least one section of the conductor is attached to each protrusion. Arrange. The diaphragm consists of a sheet of film material with a pair of similar conductors. Formed from a blank. This pair of conductors are formed in a similar shape and have a flat are arranged so as to face each other and align with each other on both sides of the film material sheet, The blank, which has not yet been bent, has a stable shape and is It does not curl or distort due to the applied stress and therefore the bow Easily bent to form a diaphragm without curving or other deformation can do.

In addition, by using a lightweight film material, usage efficiency is improved compared to conventional diaphragms. A much larger number of conductors can be easily arranged to increase the number of conductors. in this way, The diaphragm of the present invention is made of lightweight material and accommodates a large number of conductor parts. As a result, a very promising response can be obtained. The diaphragm blank is bent. so that it can remain flat in situations where it cannot be provides multiple conductor parts on both the inner and outer surfaces of each protrusion of the diaphragm. Preferably, if the transducer is a Dynamite, 7 Subika, It is preferable to set up a large number of busses of conductor parts for the assembly in use. stomach.

The lightweight, flat diaphragm of the present invention allows air to cool the diaphragm unit during use. It functions as a heat pump by flowing around the conductor. The accumulation of heat , is one of the main causes of failure of conventional speakers. When the heat is on, the voice coil Peel the conductor from the bobbin attached to the cone of the diaphragm and Ru. By the way, adhesives, especially speakers, are mainly used due to lack of sufficient air circulation. When excited more excessively, it often melts as a temperature increase defect. Against this Therefore, in the speaker of the present invention, air is passed past the conductor for cooling purposes. Each time the diaphragm vibrates, air is released through the gap in the magnet assembly. is drawn in and out of the space around the conductor for cooling purposes. subordinate Therefore, the more intensely the diaphragm is excited, the more heat is generated from the vibrations of the diaphragm itself. is removed.

This diaphragm also electromagnetically cooperates with permanent magnets uniformly distributed around the periphery of the back surface of the diaphragm. It also enables uniform response. The speaker using the diaphragm of the present invention has a total It is a frequency range speaker.

When the diaphragm of the present invention is used in a speaker, its lightweight structure and large number of current-carrying conductors Together, they provide excellent response at high frequencies. Also, the protrusions on the diaphragm may be grooved. The shape of the diaphragm and the support sheet fixed to it combine to make the diaphragm purple suitable for construction. Structurally reinforced, a series of spaced apart conductor-bearing protrusions are added to the pole piece of the permanent magnet of the magnet assembly. Helps maintain accurate alignment in the gap.

Brief description of the drawing The accomplishment and other objects and features of the present invention, and the manner in which they are achieved, are as follows: , will become clear from the following explanation. For details of the present invention, please refer to the attached drawings below. This will become clear from the description of the embodiment described above.

FIG. 1 shows an electroacoustic transducer as a loudspeaker constructed according to the present invention. FIG.

FIG. 2 is an enlarged partial sectional view of a part of the diaphragm of the speaker shown in FIG. is shown placed within the gap of the excitation magnet assembly.

FIG. 6 is a perspective view of the speaker diaphragm of FIG. 1, showing the bottom surface of the diaphragm.

FIG. 4 is an enlarged elevational view, partially in section, of the end portion of the diaphragm of FIG. 6.

Figure 5 shows a portion of the diaphragm film blank of Figure 3 before final bending. This is a schematic front view, with a portion of the blank cut away and the conductors drawn for illustration purposes. This is schematically shown.

FIG. 6 shows a structure constructed according to the present invention, in which a waveform is connected to the protrusion and formed at the top. FIG. 6 is a perspective view of a portion of an electroacoustic diaphragm according to another embodiment;

FIG. 7 shows a portion of yet another embodiment of an electroacoustic diaphragm constructed in accordance with the present invention. FIG.

FIG. 8 shows a portion of yet another embodiment of an electroacoustic diaphragm constructed in accordance with the present invention. FIG.

FIG. 9 shows a portion of yet another embodiment of an electroacoustic diaphragm constructed in accordance with the present invention. 1, 2 and 3, which are partially sectional perspective views. Then, an electroacoustic track in the form of a dynamic loudspeaker 1° constructed according to the present invention juicer is shown.

Speaker 10 generally includes a series of pole piece gaps 13 and a magnet assembly 14 (FIG. 1). It consists of an electromagnetically cooperative rectangular diaphragm or membrane 12.

The diaphragm 12 is mounted on a housing section or baffle frame at the front of the magnet assembly 14. It is supported movably across the opening 17 by the arm 16. child A pair of flexible fringing (suspension) strips 18.20 connected to both side edges of the The gasket strips 22, 24 have respective corresponding edges at their side edges. It is connected to the pick-up lip 18,20 and to the frame 16.

Each gasket strip includes a series of spaced apart gasket strips. The body has tabs 22A and 24A. These ear pieces connect the speaker 10 When assembling, the gasket strips 22, 24 and therefore the diaphragm and each protrusion P for each gap in the magnet assembly installed in the exciter frame 16 behind the opening 17. This is to facilitate the operation of positioning and positioning. As shown in Figure 6 , a pair of flexible spider-type connectors) The IJ knobs 26 and 28 are connected to the diaphragm 12. A pair of generally rectangular end-mounting blocks extend laterally from each end edge and connect those edges. 51.33 respectively. Block 61. ro 6 is in frame 16 It is designed so that it can be attached at the opening 17.

As clearly shown in FIG. 1, the front surface 29 of the folding seam 34A includes a series of , the conductor supporting protrusions P, which are located parallel to each other at intervals and extend rearward, are integrally connected to each other. A series of flats connected to each other and lying approximately in a common plane are formed by the part 'IO. has been done. The conductor carrying protrusion P magnetically interacts with the permanent magnet assembly 14; The diaphragm 12 is vibrated to generate desired sound waves.

In each case, the articulating portion 30 extends substantially at 90° transversely to the longitudinal axis of the protrusion P. placed at an angle. A support sheet 32 in the form of a thin film sheet is attached to each other. It is placed on and fixed to the connecting part 30, and each protrusion P and the diaphragm The overall structure of No. 12 is supplemented. In addition, the front surface of the seat 32 has a diaphragm 12 that is connected to all frequencies. for the diaphragm so that it can function with almost no distortion over a range of Provides a substantially smooth, flat surface.

The seat 62 is made of a suitable material so as to be firmly attached to the seat 34A and its protrusion P. attached to the interconnecting portion 60 of the seat 64A providing a large mounting surface area. Ru.

Thus, the sheet 32 remains substantially flat during use and can be adjusted to the desired frequency range. Indicates sponse characteristics.

As shown in FIG. 5, the diaphragm 12 (FIG. 1) is generally made of a thin film material. Rectangular Sea) 34 A'lI: Contains and has a substantially flat shape before being bent. It consists of 4 blanks. To assemble the diaphragm 12, use the vane holder. forming a series of mutually parallel spaced longitudinally extending protrusions P in the form of 35 This involves an operation of bending the blank 64 in order to do so. Each vane straddling fin 35 is It is elongated, groove-shaped, and has an approximately U-shaped cross-sectional shape over its entire length. vane or flap The fin 65 projects rearward toward the magnet assembly 14.

As shown in FIG. A conductor portion is attached to one side of the film blank 54 and Placed on the inner surface of the noyotsu & vane. The other side of the film blank 34 (Figure 5) The conductor portions are aligned with the corresponding conductor portion filters 6, 37, and A series of outer voice coil conductor sections such as 39, 40 and 41 are attached; It is arranged on the outer surface of a vane such as the vane filter 5.

As shown in FIGS. 1 and 2, magnet assemblies 14 are generally arranged side by side. It consists of a series of magnets 42. The magnets 42 each have a north pole and a south pole. Permanent magnets oriented as shown. As shown in Figure 1, each magnet The parts that come into instant contact have the same polarity. Each of these excitation magnets is e.g. A pair of elongated thin pole magnets, such as pole pieces 44 and 46, placed on either side of the permanent magnet 42. The vane 35 of the diaphragm 12 is received between the pole pieces. 47 to form a series of parallel spaced gaps 47.

During use, the dynamic between the current-carrying conductor portion on the vane 35 and the pole piece of the permanent magnet As a result of the electromagnetic interaction, the diaphragm 12 vibrates, thus causing the base 735 to move between the pole pieces. It moves longitudinally within the gap 47. Vane 65 and support sheet 32 attached to it The same oscillatory movement forces air out of the gap 47 for cooling purposes, thereby Reduces heat build-up. The stronger the diaphragm is vibrated, the greater the pumping action of the diaphragm. This causes more air to be expelled for cooling. Such increased air flow When the diaphragm is vibrated violently, especially when excited beyond the desired limits Desirable as it increases accumulation. Increased air flow rate may be useful for certain applications (e.g. (e.g., for automobiles), it is desirable because the ambient temperature is high.

Referring to FIG. A pair of gasket strips tightening grade 48.51 for installation on 6. Each gasket strip 22, 24 (tightened to H frame 16, screw 53, 55 fastens the fastening plate to the frame 16. As shown in Figure 6, Screw receiving notches 57° 59id provided on mounting blocks 31 and 33, respectively , and additional mounting screws (not shown) for fastening the mounting blocks to the frame 16. 0, which is for accepting As clearly shown in FIG. 2, each protrusion P has a pair of side portions 60,61 and It has a central portion 62 that interconnects them at their rear ends. The side part is It is disposed transversely and substantially at right angles to the central portion 62 . Inner conductor 3 7 and the outer conductor 40 are arranged directly opposite each other on both sides of the central portion 62. ing. The conductors 38 and 41 are arranged opposite to each other on both sides of the side portion 600, and the conductors 38 and 41 6 and 39 are arranged opposite to each other on both sides of the side portion 61.

The film blank 34 will be described in detail with reference to FIG. Generally, it is formed from any suitable heat resistant class of thermoplastic blends. preferred material Polysulfone, such as Union Car, Danbury, Conn. There is a polysulfone sold under the trade name [UDEL J] by Vido. . Other suitable compounds include General Electric Company's “ULTEMJ, sold by Imperial Chemical Industries "POLYETHER8ULFONBj (ho IJ phenyl sulfun) ), and [RADEL, J (Port) sold by Union Carbide Company. (rephenylsulfone). Also, General Electric Company You can also use a suitable polycarbonate such as LEXANJ, which is sold by I can do it.

Polyimide can also be used.

In general, heat-resistant thermoplastic materials not only have relatively high heat deflection temperatures but also , has a relatively high glass transition temperature. Saw) 34A is annealed and in place. For example, if the speaker is parked in the sunlight, Sorting during high temperature operation and at high ambient temperatures, such as when used in cars In order to maintain the desired shape of the 34A, polysulfo is used as the material for the 34A. When using UDELJ, the annealing temperature ranges from approximately 300T to below 375T. It should preferably be below about 330. That's low p Annie Materials with temperature ranges above may be used satisfactorily, but the temperature ranges mentioned above are preferred. However, in the case of other materials, temperatures higher than the above temperature range are preferred. y-) 34 A has a thickness of approximately 3 mils and the conductor is approximately 1 mil thick.

C) 34A is attached to its front surface and electrically connects a pair of terminals 63 and 65. It has a conductor pattern 67. The back surface of the sheet 64A has the front surface A similar conductive pattern 67A that is a mirror image of the conductive pattern 67 is connected to the pattern 67. They are applied in such a way that they face each other and are aligned. Thus, the sheet 34A is flat The tendency to maintain the This greatly facilitates the bending operation and also facilitates storage of the blank 64.

34A along each longitudinal conductor attached to it as shown in Figures 1 and 3. If you bend it so that it is The desired shape is achieved with little or no bowing. front surface and If the two conductor patterns on the back surface are not aligned with each other, the bending pattern will occur. The track should be bowed or warped in some way from one end to the other. It has been found that

Conductor patterns 67 and 67A are electrically connected in parallel. That is, C)3 Connect the terminals 63 and 65 of the conductor turn 67 on the front of sheet 64A and the conductor on the rear of sheet 64A. The body is electrically connected to a corresponding terminal (not shown) of the four turns 67A.

As shown in FIG. 4, the terminal wire 63A It is soldered to the corresponding terminal on the side surface. If it's Kozuze, solder and wire 6 3A end or eyelet (not shown) extends through the seat 34 hole. This is because Similarly, the terminal wire /i5A is connected to the conductor at the end of turn 67. The terminal 65 is electrically connected to the corresponding terminal of the conductor pattern 67A.

The conductor pattern 67 is a repeating Greek letter with no turns at one end. electrically connected to the conductor 63 and connected to the longitudinally extending conductor 41 at the other end. It has a transversely extending conductor portion 69. The conductor 41 has an outer transverse extension. It is integrally connected to the long conductor portion 72. Longitudinal from the transversely extending conductor portion 72 A transversely extending conductor portion 74 extends to a transversely extending conductor portion 76 . Thus, the department Minutes 41, 72, and 74 constitute one U-shaped portion of pattern 67.

Similarly, longitudinally extending conductor portion 78 and transversely extending conductor portion 76 Another U extending between the extended conductor portion 81 and consisting of portions 74, 76, 78 Complete the glyph part. The longitudinally extending conductor portion 86 is the same as the transversely extending conductor portion 81 and a transversely extending conductor section 85, forming a U-shape with sections 78, 81 and 83. It is designed to make up the following.

The longitudinally extending conductor section 87 is connected to the transversely extending conductor section 85 and to the longitudinally extending conductor section 87 . A longitudinally extending conductor portion 92 connects the conductor portions, the latter being disposed near its edges. are connected together. The transversely extending conductor portion 94 is longitudinally connected to the conductor portion 92. The direction-extending intermediate conductor portion 40 is connected thereto. Parts 83, 85, and 87 also have a U-shape. Define.

Conductor portion 40 connects a laterally extending conductor portion 94 to another laterally extending conductor portion 98. It is connected. Portion 98 extends parallel to portion 72, the latter being in line with portion 98. , and a long transversely extending conductor portion 89.

The longitudinally extending conductor section 101 is connected to the transversely extending conductor section 98 and the transversely extending conductor section 98 . It extends between the section 106. Section 101 extends parallel to section 74 and 103105 connects the portion 106 and the transversely extending conductor portion 107; The latter is located parallel to section 81.

A longitudinally extending conductor section 109 is located parallel to section 86 and transversely to section 107. The direction-extending conductor portion 112 is connected thereto. Section 109 extends parallel to section 83. portion 112 extends parallel to portion 85.

A longitudinally extending conductor section 114 extends parallel to section 87 and has a short transverse line with section 112. The directionally extending conductor portions 116 are connected. The longitudinally extending conductor section 118 is section 1 16 and a long transversely extending conductor portion 121.

Portion 118 is located near the left edge of blank 54 and portion 121 is located near the bottom of the blank. Extends parallel to the edge.

The conductor 69 extends in the longitudinal direction, and has a longitudinally extending conductor portion 121. The transversely extending conductor portion 135 extends between the transversely extending conductor portions 135 . Longitudinal extension conductor portion 13 7 connects the portion 165 and the short connecting portion 109 that connects to the terminal 65 .

As shown in FIGS. 6 and 4, the blank filter 4 is arranged to form a series of pleats. is bent in the longitudinal direction, thereby forming a series of protrusions P. Supplement the diaphragm In order to The bent blank 3 can be bent by any suitable technique, such as by applying an agent or solvent. It sticks to 4.

Forms a smooth, uninterrupted planar surface as shown in Figures 1 and 4 At the same time, in order to increase the rigidity of the entire structure, the connecting portions of the bent blanks 34 are The support sheet 52 is secured over the front surface 29 formed by the portion 60.

Referring to FIG. 6, a magnet assembly constructed in accordance with the present invention and similar to the magnet assembly of FIG. a diaphragm 186 adapted to be excited by a built-in magnet assembly (not shown); Another embodiment of an acoustic transuser 185 is shown having a transducer.

The diaphragm 186 is almost the same as the diaphragm in FIG. a series of spaced apart, longitudinally extending projections in the form of vanes or fins such as It is equipped with These protrusions are groove-shaped over their entire length and have a U-shaped cross section. Ru.

The support sheet 190 may be formed using any suitable technique such as a suitable adhesive or ultrasonic welding. It is thus fixed and serves the same purpose as the support sheet 32. Each base A series of parallel spaced vertical ridges, such as ridges 191, provide lateral stability to the A lower ridge projects into the upper portion of each vane like vane 186. sheet 190 is a suitable foam such as expanded polystyrene or expanded polysulfone. (foamed) material. form sea) 190i”t, made of folded film The diaphragm 18 is molded to perfectly match the outer shape of the front part of the diaphragm 18B.

We will now consider Vane 187 in detail. All other vanes are vanes. 187, the other vanes will not be described in detail. series of six outer voice coil conductors 192, 194.19 (S is the outer voice coil conductor 192, 194.19) connected to the diaphragm attached to the outer surface of page 7187 in a manner similar to the side voice coil conductor. The six inner voice coil conductors 198, 201.20p of the series are connected to the corresponding outer voice coil conductors 198, 201. It is attached to the inner surface of page 7187 opposite the side voice coil conductor.

To reprint vane 187 and maintain its stability and position, vane 187 includes a series of longitudinally spaced gussets or waves, such as gusset 205. The shape is set. These gussets align the longitudinal axis of the vane 187 with the supporting seat. 190. Thus, Bae The lateral stability of the pin 187 is increased. Vane 7187 and adjacent vane 18 9i1: Connecting the gusset 205 to the gusset 210 on the side wall of the vane 189. A series of parallel spaced ridges fC such as ridges or undulations 209 have a undulation. They are interconnected by integral web portions 207.

Gusset 211 provided on the opposite side wall of bay 7189 is similar to gusset 210. They are formed in a complementary shape and are heat-sealed to the gusset 210. This provides structural rigidity to the material. The ridges or ridges of the web portion 207 The waveform 212 is connected to the gusset 211. Thus, multiple pairs of mutually complementary relations A mating inwardly projecting gusset (e.g. 210 and 211) is provided on the side of each vane. Heat-shield each other to join the two side walls of the vane to stabilize the lateral displacement. connected by a roll or adhesive.

Referring to FIG. 7, an acoustic tuner constructed in accordance with the present invention and having a diaphragm 216A. Transducer 213 is shown. The diaphragm 216A is It is almost the same as the diaphragm 186 in FIG.

The diaphragm 213A has a groove shape over its entire length, and a vane 214 having a U-shaped cross section. having a series of parallel spaced elongated protrusions in the form of fins. ing. The bottom portion of the vane 214 includes a series of outer conductors 215, 216, Five spaced apart outer conductors are provided, such as inner conductors 217 and 218. , a series of four parallel spaced inner conductors each connected to a corresponding outer conductor 21 They are arranged so as to be aligned facing each other at 5°216.

In the remaining part of the diaphragm 213, a flat support sheet 219 is placed in front of the diaphragm 12. It is fixed in the same manner as the support sheet 32 fixed to the surface part. vibration Gusseted in the same manner as the gusset of plate 18B) 221° 221A A series of pairs of gussets are spaced apart on the base 7214 and are heated to each other. Joined by a seal. However, the gusset in this embodiment is It does not extend into the upper web part as in the case of web part 207 of No. 6.

Referring to FIG. 8, a magnet assembly (not shown) similar to magnet assembly 14 of FIG. An acoustic truck according to another embodiment of the present invention includes a diaphragm 2258 excited by A juicer 225 is shown. This diaphragm 225A has its support sheet It is substantially the same as diaphragm 186 with the exception of a series of vanes 222 and 223. and parallel spaced U-shaped vanes. Here about vane 222 To explain in detail, the vane 223 is the same as the vane 222. The outer surface of the bottom is provided with an outer conductor in the same manner as the outer conductor attached to the vane filter 5 in FIG. A series of three outer current-carrying conductors 224, 226, 230 are attached to the vane 2. The bottom inner surface of 22 includes a series of six parallel spaced inner current-carrying conductors 232. , 233, 237 are attached to face the corresponding outer conductors.

This diaphragm is supported in the same manner as the supporting member filter 2 fixed to the diaphragm in FIG. A member 239 is attached.

The support member 269 is made of a film material similar to that shown in FIG. The depending ridge 19 of the form support member 190 protrudes into the interior space of the vane 187 of the a series of depending channels 2 partially projecting into the interior space of the vane in a manner similar to 1; It is equipped with 40.

Referring to FIG. 9, a magnet assembly (not shown) similar to magnet assembly 14 of FIG. Another embodiment of the invention has a diaphragm 241 adapted to be excited by An acoustic transducer according to the present invention is shown. The diaphragm 241 has a gusset. It is almost the same as the diaphragm 186 in FIG. 6, except that there is no vane 243. 244, with a series of parallel spaced elongated U-shaped vanes.

Since vane 244 is the same as vane 246, we will now consider vane/243. Then, the base 7246 has a series of six It includes outer conductors 245, 247, and 249. On the inner surface of the vane 243 , a series of six inner conductors 250, 252, 254 each with a corresponding outer conductor are arranged in line facing each other.

Foam support sheet 258 is similar to foam support sheet 190 is fixed in place.

The support sheet 258 includes internal upper portions of the vanes, such as vanes 243 and 244. A series of elongated depending ridges 261.263-like ridges are provided that plunge into the . Ridges 261° 263 serve the same function as channel 240 of diaphragm 225A. .

Although specific embodiments of the invention have been disclosed above, it is within the spirit and scope of the claims. It will be understood that various modifications are possible. For example, the diaphragm of the present invention A variety of different types and kinds of materials can be used as materials for . Therefore, the invention is not strictly limited to the above description.

m town large button stop Inohara version standing rut tongue

Claims (1)

[Claims] 1. Electroacoustic transducer having a plurality of spaced apart magnetic means A diaphragm for use in A film having elongated, spaced apart groove-shaped protrusions along its entire length. a folded sheet affixed to each of said protrusions to cooperate electromagnetically with said magnet means; conductor means extending substantially in alignment with said magnetic means; and a front surface of said sheet; a substantially flat thin sheet layered over the surface of the diaphragm. 2. Each of the protrusions is U-shaped, and includes a pair of side portions and a pair of side portions. having a central portion interconnecting said conductor means, at least a portion of said conductive means being in said central portion; The diaphragm according to claim 1, wherein the diaphragm is disposed in the central portion. 3. The front surface interconnects each of the protrusions and is located approximately in a common plane. 2. A vibration according to claim 1, wherein the vibration is formed by a series of substantially flat sections. Board. 4. The conductor means has the bends attached on the sheet and the side portions of the conductor means. 3. A diaphragm according to claim 2, having second and third conductor portions disposed therein. 5. Claim 2, which includes conductor means disposed on the inner surface of the groove-shaped protrusion. diaphragm mounted on it. 6. Claim 1, including a pair of end walls fixed to both sides of the folded sheet. diaphragm mounted on it. l A first pair of flexible connecting strips connected to both side edges of the folded sheet; A second pair of connecting strips are provided connected to and extending from the end wall. , their connecting strips have mounting blocks to secure them in place The diaphragm according to claim 6, comprising: 8. a series of spaced pairs of inwardly projecting gussets on said side portion; The shaker according to claim 2, wherein each pair of gaskets are in contact with each other. Moving plate. 9. Each of the gussets connects each of the protrusions to each other, and the bends are formed at the edges of the sheet. 9. The diaphragm of claim 8, wherein the diaphragm extends into the web portion. in, said flat sheet has a plurality of depending portions projecting partially into said corresponding protrusions. Claim 2 is formed by a sheet of foam material having ridges. diaphragm. 1t the flat sheet has a series of spacings that partially protrude into the corresponding projections; 6. A diaphragm as claimed in claim 5, having a depending channel. 1z Electro-acoustic transformer for cooperation with a plurality of spaced magnetic means A juicer diaphragm having a substantially flat front surface and a double diaphragm protruding from the rear surface. A mold molding having a number of spaced apart, elongated, groove-shaped protrusions along its entire length. A molded or otherwise formed fold of film material is attached to the sheet and onto each of the protrusions. and extending substantially in alignment with said magnet means for electromagnetically cooperating with said magnet means. an elongated conductor means and a material overlying and affixed to the flat front surface of said sort; A diaphragm consisting of a qualitatively flat thin sheet. 13. The conductor means extends on both sides of the sheet of film material and is electrically conductive to each other. Claim 12 includes a pair of first and second conductors that are electrically connected to each other. The diaphragm described. 14 A diaphragm blank for forming the diaphragm of an electroacoustic transducer. A pair of first and second conductor means are arranged on both sides facing each other and aligned. A diaphragm blank consisting of a sheet of thin heat-resistant thermoplastic film material with 15. The heat-resistant thermoplastic film material is subjected to an annealing temperature higher than 600°F. The diaphragm blank according to claim 14, comprising: 16. The film material may be polysulfone, polycarbonate, or polyimide. 15. The diaphragm blank of claim 14, wherein the diaphragm blank is selected from the group consisting of: