CN1041587C - Production of vibrating objects used in electric acoustic exchanger - Google Patents

Abstract

To decrease process man-hours and simplify processes and to improve characteristics of the vibration body and stabilize the quality by welding magnetic pieces on a resonance plate raw material at constant intervals and then punching the resonance plate raw material. The resonance plate raw material 6 and a magnetic piece raw material 10 are arranged in parallel, and the raw material 6 and the raw material 10 are conveyed by a conveyance device 9 and a conveyance device 11 continuously or intermittently, synchronously or asynchronously, and individually as shown by arrows (a) and (b). On the conveyance path on the side of the raw material 10, a press machine 12 is installed; and a conveyance device 14 which conveys magnetic pieces 8 to the side of the raw material 6 as shown by an arrow (c) is arranged between the raw material 6 and raw material 10, and the press machine 18 which punches the raw material 6 into resonance plates 4 as shown by an arrow (d) is arranged on the side of the raw material 6 together with a laser welding machine 16. Said devices and equipments are controlled by a control part 20. Then the raw material 6 is conveyed, the magnetic pieces 8 which are previously formed are mounted thereupon, and after a welding process, the material plate is punched in a specific shape. Consequently, the directivity only on the side of the magnetic pieces 8 is only considered.

Description

The electroacoustic transducer manufacture method of vibrating body

The electroacoustic transducer of the sound vibration conversion in the magnetic field of the signal of telecommunication correspondence that the present invention relates to be used for and import is with the manufacture method of vibrating body.

Electric acoustic conversion resonator is loaded in in the various miniature electric machines such as portable beep-pager of card shape.Require miniaturization in this class electricity sound machine, its component parts is emphasized the tendency of tinyization.

Figure 11 and Figure 12 represent to be used for an example of the electroacoustic transducer in the past of buzzer etc.Become the processing that individually is shaped of columnar upper casing 202 and lower casing 204 usefulness synthetic resin.At the back side of lower casing 204 yoke 206 and substrate 208 are housed on one side, these yokes 206 and substrate 208 usefulness binding agents are by integrated.Adorning magnetic core 210 to connect form in the central.At the coil 212 that is equipped with on the magnetic core 210 in advance above skeleton etc., around it, locate to be equipped with magnetite 214 circlewise.The lead-in wire 216,218 of coil 212 is drawn at the back side of substrate 208 on one side, receives on the electrode 220,222 on the substrate 208 with solder.With respect to vibrating body 224, yoke 206, magnetic core 210, and magnetite 214 constitute electromagnetism transform portions 226.

On the internal face of lower casing 204, be provided with the support step 228 of the edge indentation of ratio open.This supports being formed on of step 228 to cause the big part of diameter 230 on the opening portion.And vibrating body 224 is installed on the support step 228.Be equipped with in the heart in this vibration 224 to strengthening the discoid magnetic sheet 232 of one-tenth of oscillating mass.That is, vibrating body 224 is made of thin resonator 231 and magnetic sheet 232.

Embed the fitting portion 234 of upper casing 202 on the big part 230 of the diameter of lower casing 204, the engagement means of this lower casing 204 and upper casing 202 usefulness ultrasonic bonding etc. is bonded into one.And on the upper casing 202 and the vibration sympathetic response of vibrating body 224,, formed sympathetic response space 236 for obtaining suitable sound press, simultaneously, outstanding on one side and be formed with the playback tube 240 of open-work 238 to sympathetic response space 236 in its courtyard part.

, to such electroacoustic transducer, influence such as the Performance And Reliability of the acoustic characteristic of the product confrontation electroacoustic transducer of vibrating body 224 etc. is very big.Manufacture method about this vibrating body 224 now is described.As shown in figure 13, vibrating body 224 usefulness spot welding machines 242 engage processing.That is, the plate of material that resonator 231 usefulness have the vibration characteristics that is suitable for vibrating body 224 and a magnetic characteristic imposes punch process and becomes discoideus, and same, magnetic sheet 232 is also formed by the plate of magnetic material punch process.Again, with resonator 231 put the limit, magnetic sheet 232 is placed on bottom, sandwich between the electrode 224,246 of spot welding machine 242, with magnetic sheet 232 be welded on resonator 231 in be formed centrally vibrating body 224.Thereby, in the formation of vibrating body 224, must distinctly do the press work of resonator 231, magnetic sheet 232, both processing of welding job etc.

, form resonator 231 and magnetic sheet 232, as shown in figure 14, form burr 248,250 in the marginal portion of resonator 231 and magnetic sheet 232 in order to adopt punch process.The engagement state of 248,250 pairs of resonators 231 of each burr and magnetic sheet 232 is influential, and the result will make the direction of each burr 248,250 as one man engage resonator 231 and magnetic sheet 232.Thisly make the processing of the directivity unanimity of burr 248,250 increase the manufacturing procedure number.

The occasion of the direction unanimity that does not make burr 248,250 produce following improper.For example, shown in Figure 15 (A), allow burr 248,250 engage resonator 231 and magnetic sheet 232 mutually on the contrary, the support step 228 of the lower casing 204 of burr 248 contact electric acoustic converters, the status of support instability of resonator 231.Burr 248 produces different formerly at the edge of resonator 231, vibrating body 224 is configuration obliquely with the height of burr 248, the result, and the vibrational state of vibrating body 224 is affected with burr 248.

Also have, shown in Figure 15 (B), burr 250 contacts of magnetic sheet 232 are configured on resonator 231 these one side faces, and burr 250 becomes and has influence on both welded conditions, probably can take place to weld crooked because of magnetic sheet 232 from resonator 231 come-ups etc.And in the occasion of Figure 15 (B), magnetic sheet 232 is welded on one side, the back side of the burr 248 of vibrating body 224, the result, and improper the increasing the weight of of Figure 15 (A) occasion produced.

Again, in the occasion of Figure 15 (C), the improper elimination of Figure 15 (A), but the improper of the occasion of Figure 15 (B) still produces.

Improper like this in order to avoid, in the past, in the formation with vibrating body 224, be necessary to differentiate resonator 231 and magnetic sheet 232 burr 248,250 have or not distinguish in the surface, in addition, when punch process, must manage like this by nonreversible resonator 231 and magnetic sheet 232.Particularly, because of resonator 231 and magnetic sheet 232 are very little, all be in the past a total keeping in container, welding job want many pieces of ground differentiate in the surface send welding electrode to and carry out work like this, but this greatly reduces operating efficiency, probably can go out the substandard products shown in Figure 15 mistakenly.

So, as shown in figure 13, introduce the resonance line 252 of the table the inside of an expression resonator 231, differentiate in showing as mark with this.Attached on resonator 231 is necessary with resonance line 252 for gathering production, but its result has made the component processing difficulty, causes the low of quality.In addition, magnetic sheet 232 is carried out same processing, perhaps implement processing with method flash removedes 250 such as pressure processing.Manufacturing cost is increased in such processing, because of surface oxidation becomes the reason that quality descends.

Have again, reason in response to the resonator 231 and the burr 248,250 of magnetic sheet of welding, in order to realize suitable joining process, stained and consume for the electrode surface of the motor 244,246 of spot welding machine 242, essential per grindings of carrying out electrode surface in 30 minutes etc. be necessary to carry out strict management, and each base material of resonator 231 and magnetic sheet 232 necessitate to the electric insulation between the press working machine of its punch process, because of the realization difficulty of manufacturing equipment, become the obstacle that automation is handled.

So, the purpose of this invention is to provide a kind of electroacoustic transducer manufacture method with vibrating body, seek to cut down process number and work simplification improves the vibrating body characteristic simultaneously, stay in grade.

The electroacoustic transducer of the present invention manufacture method of vibrating body, as be illustrated in as shown in Fig. 1, it is characterized in that transferring the sympathetic response slab material (6) that should form resonator (4), after the magnetic sheet (8) of burn-oning at certain intervals on this sympathetic response slab material, above-mentioned sympathetic response slab material is implemented towards processing, and the formation magnetic sheet is contained in the vibrating body (2) on the resonator.

The manufacture method of vibrating objects used in electric acoustic exchanger of the present invention, such in Fig. 1 as shown, when handover should form the sympathetic response slab material (6) of resonator, handover should form the magnetic disk billet (10) of magnetic sheet (8), this magnetic disk billet is implemented punch process form magnetic sheet, this magnetic sheet is transplanted on above-mentioned toot the slab material altogether to weld also with certain interval is fine.

In addition, about the manufacture method of electroacoustic transducer of the present invention with vibrating body, go out magnetic sheet from magnetic disk billet, this magnetic sheet is returned after the pressing part office that remains on above-mentioned magnetic disk billet, this magnetic disk billet is transplanted on above-mentioned sympathetic response slab material here, supplies with to doing like this on above-mentioned toot the slab material altogether the above-mentioned magnetic sheet that remains on the above-mentioned magnetic disk billet also passable.

About the manufacture method of electroacoustic transducer of the present invention with vibrating body, handover should form the sympathetic response slab material of resonator, and preformed magnetic sheet is put thereon, after the execution soldering, carries out plate of material is washed into the processing of the shape that formalizes.With such facture, because this directivity on one side of resonator is fixed, only, can cut down relevant therewith process number with considering that this directivity on one side of magnetic sheet is just passable, simultaneously the engagement relationship of resonator and magnetic sheet becomes well, can work for the stablizing of quality of vibrating body.

Also have, electroacoustic transducer of the present invention is with the manufacture method of vibrating body, and the magnetic disk billet that should form the sympathetic response slab material of resonator and should form magnetic sheet is transferred together, makes punch process and form magnetic sheet on magnetic disk billet.This magnetic sheet is placed on the plate of material in the handover at certain intervals, welds.And, use the sympathetic response sheet material that welds magnetic sheet implemented punch process, can with the synchronous state of the processing of magnetic sheet under make vibrating body.If according to such manufacture method, more can cut down the treatment process number and simplified work, improved the vibrating body characteristic simultaneously, work for quality stable of vibrating body.

And, use in the manufacture method of vibrating body at electroacoustic transducer of the present invention, implementation remains on magnetic sheet among the punching out part of the magnetic disk billet of making punch process, be so-called putting back to, allow the magnetic sheet of going out hold by magnetic disk billet, with transfer device this magnetic disk billet is transplanted on the sympathetic response slab material, uses again magnetic sheet is released way on the sympathetic response slab material, can seek the handover of magnetic sheet and summary, the automation of supply.Used this way of putting back to, just do not needed the differentiation and the operation thereof of magnetic sheet direction fully, accidents such as magnetic sheet counter-rotating just can not have fully.The result is, goes magnetic sheet is welded to occasion on the sympathetic response slab material, and the directivity of magnetic sheet is unitized, has improved the reliability of the vibrating body of manufacturing.

By above explanation, by the present invention, it is unnecessary or the like to make the direction of the burr that is produced by punch process get consistent operation, can operation be simplified, and raising vibrating body characteristic, its result can try to achieve the stabilisation of vibrating body quality and improves the characteristic of electroacoustic transducer and product quality improves.

Also have, by the present invention, the magnetic sheet of going out from magnetic disk billet can be returned in the punching out part of magnetic disk billet is supplied to sympathetic response slab material to carry out soldering again, do not need the differentiation and the operation thereof of magnetic sheet punching out direction fully, improve operability and can produce the high electroacoustic transducer vibrating body of reliability, can help to improve the quality of electric sound equipment conversion.

Fig. 1 is the block diagram of expression electroacoustic transducer of the present invention with the 1st embodiment of the manufacture method of vibrating body.

Fig. 2 is the oblique view of expression electroacoustic transducer shown in Figure 1 with the 2nd embodiment of the manufacture method of vibrating body.

Fig. 3 is the sectional drawing of the punch process of expression stamping machine and magnetic sheet.

Fig. 4 is the sectional drawing of the maintenance of dashing processing and magnetic sheet of expression magnetic disk billet, magnetic disk billet.

Fig. 5 is the figure of the welding processing expression laser welder and magnetic sheet and sympathetic response slab material.

Fig. 6 is the sectional drawing of the punch process of expression stamping machine and sympathetic response slab material.

Fig. 7 is that expression forms the sectional drawing of electric loud converter with vibrating body from sympathetic response slab material.

Fig. 8 is the oblique view of expression electroacoustic transducer of the present invention with the 3rd embodiment of the manufacture method of vibrating body.

Fig. 9 is that expression has been used by the electric sound equipment conversion exploded perspective view of electroacoustic transducer of the present invention with the vibrating body of the manufacture method manufacturing of vibrating body.

Figure 10 is the skiagraph of expression electroacoustic transducer shown in Figure 9.

Figure 11 is a skiagraph of representing electroacoustic transducer in the past.

Figure 12 is the back view that is shown in the electroacoustic transducer of Figure 11.

Figure 13 is an oblique view of representing the manufacture method of electroacoustic transducer usefulness vibrating body in the past.

Figure 14 electroacoustic transducer that to be expression obtained by in the past manufacture method is with the skiagraph of vibrating body.

Figure 15 electroacoustic transducer that to be expression obtained by in the past manufacture method is with the skiagraph of the form of the substandard products of vibrating body.

Symbol among the figure:

2 electroacoustic transducer vibrating bodies

4 resonators

6 sympathetic response slab materials

8 magnetic sheets

10 magnetic disk billets

Below, describe the present invention in detail with reference to embodiment shown in the drawings.

Fig. 1 has represented 1st embodiment of electroacoustic transducer of the present invention with the manufacture method of vibrating body.Should form electroacoustic transducer uses the good springiness that is magnetic material with the sympathetic response slab material 6 of the resonator 4 of vibrating body 2 metallic plate.This sympathetic response slab material 6 is banded, is to be rolled into band steel shape cylindraceous in this embodiment.

In addition, should form for electroacoustic transducer and use the metallic plate that constitutes by magnetic material with the magnetic disk billet 10 of the magnetic sheet 8 of vibrating body 2.This magnetic disk billet 10 is banded, in this embodiment, is to be rolled into band steel shape cylindraceous.

These sympathetic response slab materials 6 and magnetic disk billet 10 configured in parallel, simultaneously, sympathetic response slab material 6 is used as the 1st conveyer 9, the magnetic disk billet 10 that transports means and is used as the 2nd conveyer 11 that transports means continuously or off and on, and, individually shown in arrow a, b, transport like that with synchronous or asynchronous.Transport in the way at it, this establishes the stamping machine 12 as the 1st punch process means on one side at magnetic disk billet 10, between sympathetic response slab material 6 and magnetic disk billet 10, disposed as with magnetic sheet 8 to be transported to the conveyer 14 of sympathetic response slab material 6 the means of transporting here shown in the arrow C like that, at the low-light bonding machine 16 of sympathetic response slab material 6 next doors configuration as the welding means, simultaneously, disposed as shown in arrow d like that to the stamping machine 18 of the 2nd punch process means of sympathetic response slab material 6 punching out resonators 4.

And, conveyer 9,11, stamping machine 12,18, conveyer 14 and low-light bonding machine 16 are with control part 20 controls that are control device.In this embodiment, for carrying out Electronic Control, 20 li use microcomputers of control part, the storage device that possesses the ROM to storage control program, the RAM of random writing data necessary etc. perform calculations and the CPU of control and treatment, go out the unit for the input of the taking-up of the input of carrying out data and control output.

Below, Fig. 2 represents electroacoustic transducer shown in Figure 1 the 2nd embodiment with the manufacture method of vibrating body, the consistent shared part of each symbolic representation.The 2nd embodiment is equivalent to the specific embodiment of the 1st embodiment shown in Fig. 1.In this embodiment, establish take-off plate 21 in the transfer device 14, on the leading section of this take-off plate 21, form retaining hole 22 for the magnetic sheet 8 that keeps obtaining by punch process.

Handle with the manufacturing of vibrating body 2 with this electric sound equipment conversion of operation serial interpretation, allow and transfer sympathetic response slab material 6 and magnetic disk billet 10 in arrow a, b direction.For example, suppose to carry out off and on this and transfer, magnetic disk billet one is to the stamping position of stamping machine 12, at this moment between some magnetic disk billet 10 stop, with shown in the arrow e like that, implement punch process.At this moment, the take-off plate 21 of transfer device 14, with shown in the arrow d like that, move to magnetic disk billet 10 below, make its retaining hole 22 standbies in stamping machine 12 places.

Fall or be inserted in the retaining hole 22 through punch process and from the magnetic sheet 8 that magnetic disk billet 10 breaks away from and remain on the take-off plate 21.

With this state with take-off plate 21 by appearance shown in the arrow C be transplanted on sympathetic response slab material 6 above, with certain arranged spaced of magnetic sheet 8 surface, utilize take-off plate 21 laser-beam welding machine 16 that magnetic sheet 8 is welded on the sympathetic response slab material 6 as guide means to sympathetic response slab material 6.After the welding of magnetic sheet 8 finishes, take-off plate 21 by revert to like that shown in the arrow f magnetic disk billet 10 below.

Welded the sympathetic response slab material 6 of magnetic sheet 8 and pressed the handover of direction shown in the arrow a again, on the position of magnetic sheet 8 corresponding to stamping machine 18.That is, the magnetic sheet 8 central circular punch process to its ring slab material 6 is implemented form vibrating body 2.The 24th, the punching hole of its ring plate 4.

Because above processing carries out continuously, can form vibrating body 2 through the punching out of punching out, handover and the welding of magnetic sheet 8 and ring plate 4 thereof.

In addition, in this 2nd embodiment, the parastate of sympathetic response slab material 6 and magnetic disk billet 10 is transferred, and both processing of dashing is carried out simultaneously, but carries out the processing of dashing that both separate also is fine.

Below, illustrate about the specific embodiment of electroacoustic transducer of the present invention with stamping machine 12,18 and laser-beam welding machine 16 among the 1st and the 2nd embodiment of the manufacture method of vibrating body.

(A) of Fig. 3, (B) and Fig. 4 represent the punching out processing of stamping machine 12 and magnetic disk billet 10.As (A) of Fig. 3 with (B), in the stamping machine 12, be provided with stripper 121 and drift 122 by shaped as frame parts 120, between stripper 121 and drift 122, be provided with spring 123.Stripper 121 is that the guide means of the guiding drift 122 that belongs to the punching out means is again the maintenance means of magnetic disk billet 10 simultaneously.And, below this drift, be provided with punch die 124, in this punch die 124, be provided with knock pin 125, this knock pin 125 by spring 126 may flexibly supporting with pushing back.

According to this kind stamping machine 12, shown in Fig. 3 (A), magnetic disk billet 10 1 arrives, and shown in arrow g among Fig. 3 (B), shaped as frame parts 120 are fallen, and stripper 121 and drift 122 are fallen simultaneously.At this moment, stripper 121 stops above magnetic disk billet 10 is clipped in punch die 124, spring 123 compression and shaped as frame parts 120 and drift 122 are fallen, and its head gets off magnetic sheet 8 from magnetic disk billet 10 upper punches.At this moment, punch die 124 the knock pin 125 is here also fallen with spring 126 compressions.And after this punching out processing, shaped as frame parts 120 are such one to retreat shown in the arrow h, and knock pin 125 just also returns shown in arrow h like that.Fig. 4 represents dashing processing, pushing back processing of this magnetic sheet 8.Be shown in the magnetic disk billet 10 of (a), after punching out, be shown in (b), the result who pushes back is shown in (c), turns back in the punching of magnetic disk billet 10 as the magnetic sheet 8 of goods, remains in the magnetic disk billet 10.

This kind pushes back if be used in possible press working machine, and the transfer device 14 shown in dual-purpose Fig. 2 can utilize magnetic disk billet 10 in press working machine as the handover means of magnetic sheet 8.

Below, the soldering of Fig. 5 (A), (B) expression laser-beam welding machine 16 and magnetic disk billet 10.Shown in Fig. 5 (A), (B), in laser-beam welding machine 16, be provided with shaped as frame parts 160, these shaped as frame parts 160 are that the received block of toot slab material 6 altogether constitutes the laser beam miter guide simultaneously.Be provided with guide plate 161 as the conductive means of conduction magnetic sheet 8 to the sympathetic response slab material 6 on these shaped as frame parts 160 tops, above the magnetic sheet 8 that is conducted with magnetic disk billet 10, be provided with as the means that magnetic sheet 8 is released, may be by the magnetic sheet push head 162 that descends like that shown in the arrow i.

In addition, be provided with the condenser 164,165 of laser beam 163 optically focused to the welding portion of sympathetic response slab material 8, below these condensers 164,165, laser beam sources 166 be set in the inside of shaped as frame parts 160.That is, the laser beam 163 that penetrates from laser beam sources 166 by condenser 164,165 optically focused after, focus is condensed upon on the solder side.

If used this laser-beam welding machine 16, by transporting sympathetic response slab material 6 and magnetic disk billet 10 shown in arrow a and the b, magnetic sheet push head 162 is released the magnetic sheet 8 reach institute's allocation by descending like that shown in the arrow i, and with suitable pressure hold it in sympathetic response slab material 6 above.This time chien shih hit solder side from the laser beam 163 that laser beam sources 166 penetrates, sympathetic response slab material 6 and magnetic sheet 8 are welded.

Secondly, Fig. 6 (A), (B) and Fig. 7 have represented the punching press processing of press working machine 18 and sympathetic response slab material 6.Shown in Fig. 6 (A), (B), in press working machine 18, punching template 181 and drift 182 are set with shaped as frame parts 180, between punching template 181 and drift 182, establish spring 183.Punching template 181 is guide meanses that guiding belongs to the drift 182 of punching press means, also is the maintenance means of sympathetic response slab material 6.In addition, the recess 184 of the magnetic sheet 8 on the sympathetic response slab material 6 that yielding of formation is gone out below drift 182.And this dash totally 182 below be provided with punch die 185.

As the press working machine having used 18, shown in Fig. 6 (A), in case sympathetic response slab material 6 arrives, shaped as frame parts 180 are just fallen shown in the arrow d of Fig. 6 (B), and punching template 181 and drift 182 also lower simultaneously.At this moment, the stamping die utmost point 181 is clipped in sympathetic response slab material 6 on the punch die 185 and stops, but spring 183 by compression and shaped as frame parts 180 fall together with drift 182, and its head gets off resonator 4 from its ring slab material 6 upper punches.At this moment, magnetic sheet 8 is kept dashing not by the recess 184 that dashes totally 182 following side.Handle acquisition electroacoustic transducer vibrating body 2 with this punching press.

Handle the electroacoustic transducer that obtains with this punching press with vibrating body 2, as shown in FIG. 7, produce burr 28, it and handle the burr 26 that results from the magnetic sheet on the resonator 48 equally all upward with punching press.Therefore, needn't consider the magnetic sheet 8 as processing method in the past and the discriminating direction of resonator 4 fully, just can obtain the electroacoustic transducer that requires as purpose with vibrating body 2.

Below, Fig. 8 represents electroacoustic transducer of the present invention the 3rd embodiment with the manufacture method of vibrating body, provides same label with identical part among the 2nd embodiment of Fig. 2.In the 2nd embodiment, be that the magnetic sheet 8 that utilizes transfer device 14 to go out on magnetic disk billet 10 is transplanted on sympathetic response slab material 6 this sides, but in the 3rd embodiment, the magnetic sheet 8 that to go out on magnetic disk billet 10 pushes back and is keeping, again this magnetic disk billet 10 is disposed at sympathetic response slab material 6 above, one side is released magnetic sheet 8 on the sympathetic response slab material 6 shown in arrow i like that, one side is welded with laser welder 16, after this, sweep away resonator 4 from sympathetic response slab material 6 again, obtain electroacoustic transducer vibrating body 2.According to such manufacture method, each stamping procedure and Laser Welding can be unloaded, carrying out continuous automation handles, the discriminating direction and its management or the like that do not need resonator 4 and magnetic sheet 8 fully can be obtained and make the work simplification electroacoustic transducer vibrating body 2 that reliability is high again simultaneously.

Subsequent, Fig. 9 and Figure 10 have represented the manufacture method of use by the electroacoustic transducer of the vibrating body 2 of above-mentioned manufacture method gained.The upper casing 30 and the lower casing 32 that constitute shell are processed by forming synthetic resin respectively.This occasion is made base plate 34 with embedding the forming process mold pressing in the lower casing 32, forms the support step 36 of supporting vibrating body 2 simultaneously, for magnetite 46 being positioned the locator protrusions 38 in the lower casing 32.On the base plate 34, form through hole 40,42, and fixing magnetic core 44.

In the inside of lower casing 32, be arranged to circular magnetite 46 with projection 38 location, fix with binding agent, and on magnetic core 44, install coil 48.The termination 50,52 of coil is drawn out to its back side on one side from the through hole 40,42 of base plate 34.Coil end 50,50 is drawn out at lower casing and is embedded in the not terminal solder of expression among the substrate 54 base plate 34 back sides of shaping made on one side and the figure by synthetic resin again.

In addition, on the support step 36 of lower casing 32, vibrating body 2 is set.Because the resonator 4 of vibrating body 2 is magnetic materials, the magnetic force magnetization by magnetic surface 46 can stably remain on and support on the step 36.

And, will become in advance with shell 30 on the part of the shell of forming synthetic resin and be fixed on the top of lower casing 32 with fixing means such as bonding agent or welding, obtain electric acoustic converter shown in Figure 10 thus.Because be provided with upper casing 30, form sympathetic response space 55 on the top of vibrating body 2, the through hole 58 of the playback tube 56 of this sympathetic response space 55 by being formed at upper casing 30 is to outside space opening.

According to this electroacoustic transducer,, can obtain the product that vibration characteristics is good, the reliability of stay in grade is high because do not have the machining accuracy of vibrating body 2 and the influence that burr causes.

In addition, with reference to embodiment the present invention has been described, but the present invention does not limit present embodiment, but comprised can reach the object of the invention various variation interior.

Claims (3)

1. an electroacoustic transducer is with the manufacture method of vibrating body, this electroacoustic transducer vibrating body is to constitute by magnetic sheet is installed on the resonator that is formed by sympathetic response base material, it is characterized in that, transfer above-mentioned sympathetic response slab material, after being welded on magnetic sheet on this sympathetic response slab material with certain interval, aforementioned sympathetic response slab material is implemented towards processing, to form described vibrating body.

2. an electroacoustic transducer is with the manufacture method of vibrating body, this electroacoustic transducer vibrating body is by on the resonator that is formed by sympathetic response base material, installation is made of the magnetic sheet of magnetic disk billet shape, it is characterized in that, when transferring described sympathetic response slab material, transfer described magnetic disk billet, this magnetic disk billet execution is dashed processing and formed described magnetic sheet, described magnetic sheet is transplanted on the described sympathetic response slab material welds at certain intervals, then described sympathetic response slab material is implemented and dashed processing, to form described vibrating body.

3. use the manufacture method of vibrating body according to the electroacoustic transducer of claim 1 or 2, it is characterized in that, go out magnetic sheet from magnetic disk billet, after the punching out that described magnetic sheet is returned to described magnetic disk billet is partly located keeping, described magnetic disk billet is transplanted on described sympathetic response slab material here, and the described magnetic sheet that will keep in described magnetic disk billet offers described sympathetic response slab material.

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