CN86100615A - Loud speaker and manufacture method thereof - Google Patents

Abstract

One loud speaker possesses and has: one comprises the magnetic loop of magnet, metallic plate etc.; One comprises the oscillating component of moving coil, oscillating plate etc.; And the frame that supports above-mentioned metallic plate and oscillating plate in the outside, it is characterized by, above-mentioned metallic plate is placed into the bottom of frame so that to its side reinforcing, or by means of the riveted joint combination.

Description

Loud speaker and manufacture method thereof

The present invention relates to the frame of loud speaker and the combination technology of metallic plate, mainly is to be object with the electrodynamic loudspeaker.

Usually, dynamic speaker is by the magnetic circuit that comprises magnet, metallic plate, yoke etc., the oscillating component of moving coil such as pyramid type oscillating plate etc. and connect to support from the outside that the frame (framework) of above-mentioned metallic plate and above-mentioned oscillating plate constituted.

In such loud speaker, when the basic backing material of assembling, when being metallic plate and frame, being to be connected on the outer bottom of chase, aluminium frame etc. by the formed metallic plate of magnetic conductors such as soft iron plate in the past, or fixedly forming by means of the mechanical device of bolted by means of electric welding, adhesives etc.

But the combination of this metallic plate rack construction is also insecure, has sometimes because of the loud speaker start produces iron powder, and makes shortcomings such as fastening part is loose.

Example adds, and is that example is illustrated with the metallic plate frame mounting structure of certain existing external magnetic type loud speaker of Fig. 1.

Tabular metallic plate 1 in this example is positioned at the outside of frame 2, is connected the coupling part 3 of frame outer bottom 2a by spot welding.As use this structure, can produce the problem of tonequality aspect, that is the gas leakage from the coupling part takes place, or the resonance sound that takes place because of bad connection, must conduct a survey again in order to obtain good tonequality.In this case, therefore metallic plate 1, has to have unnecessary volume for the performance of loud speaker because of spot welding or the necessary flat board that uses of terminal operation.Fig. 2 represents other examples of the metallic plate frame mounting structure of loud speaker in the past.

In this example, metallic plate 1 is pushed or is welded on the inner bottom part 2b of the frame 2 of making the frame shape, in such structure, metallic plate 1 still uses dull and stereotyped, when being pressed into, cooperates then very difficulty with the size of frame.When being pressed into,, or can change the size or the shape of loud speaker because of the various conditions of metallic plate internal diameter size variation etc. then because the variation of frame 2 by means of back processing.Therefore it is difficult will in fact making uniform loud speaker.And, when being pressed into metallic plate, shown in figure arrow A, metallic plate is inserted the frame bottom because of one side enlarges one side slightly, the frame bottom surface is drawn and is easily produced amount of deflection, is easy to generate the gap 4 between metallic plate and the framework soleplate.

And, when metallic plate is pressed into, can scratch medial surface at the bottom of the frame, its iron powder promptly enters the space of frame and metallic plate and hinders and be close to.In order to prevent entering of this iron powder, the size of metallic plate must be made the diameter that is slightly less than pressing part, and be fixedly welded on the bottom, there is no additive method in addition.

As the additive method that prevents that iron powder from entering, though once the someone proposed, as shown in Figure 3, the peripheral corners of the bottom of metallic plate 5 made fillet and iron powder is sealed in the space that is into produced between this fillet and frame 1, but the permanence of the relevant metallic plate internal diameter that belongs to decision speaker performance greatest factor because of taking place to destroy to the stress at center in this moment at metallic plate 5.

Therefore, in loud speaker in the past,, in processing, many difficult problems are arranged although the so-called metallic plate that is fixed in frame inside can have different shape, in fact sometimes produce defective aspect the quality with in the past stamping technology, can not make the loud speaker of external magnetic type.

In view of the above problems, purpose of the present invention is to provide the loud speaker that will shape only be arranged in the past to become loadspeaker structure and the manufacture method that in fact may make.

The summary of the embodiment of following simple declaration in the invention that this case disclosed.

That is, has the oscillating component magnetic circuit that comprises magnet, metallic plate, an oscillating plate, moving coil etc. one, reach in the outside and connect in the loud speaker of the frame that supports above-mentioned metallic plate and oscillating plate, with metallic plate put into frame the bottom in case in the metallic plate side an additional power, or connect metallic plate and frame by means of riveted joint.By this mounting structure that forms from the extruding or the riveted joint in the outside, the sound deterioration in gap etc. can not take place in the integration of being close to that can improve frame and metallic plate, and has the loud speaker of good characteristic.

Fig. 4 to Fig. 6 represents one embodiment of the invention, and the process profile diagram of the external magnetic type metallic plate rack technology part in the expression dynamic speaker.

In Fig. 4, the 6th, with the in addition drawing and become the frame of the open slightly shape in bottom of iron or aluminium sheet.Discoideus soft iron magnetic conductor metallic plate 7 is placed in the flat bottom of this frame.As shown in Figure 6, this metallic plate 7 is provided with rag (hackle mark) 8 along peripheral side, has open-work 9 at the center.Though the outer diameter D of this metallic plate 7 is identical with the inner diameter d of frame 6 bottoms, can be under loose state because of being not more than internal diameter at least, embedding or tight card are in the frame bottom.

Fig. 5 represents to change the bottom sides part of frame, metallic plate is wrapped up the state of extrusion molding.At this moment, use metal pattern its extrusion molding; Or use the mould pressing lathe, one side is rotated metallic plate frame, direction increase pressure, an extrusion molding towards arrow B.

Fig. 7 is for clamp-oning the oblique view that is fixed in metallic plate from tiltedly seeing down with frame.

Opening in the open-work on the metallic plate 79 is in order to absorb when pushing from metallic plate on every side to the stress center and that reach center space partly.

Fig. 8 is embodiments of the invention, except that the central part at metallic plate is provided with open-work 9, arranges open-work group 10 in equally spaced mode around metallic plate.At this moment, open-work group 10 absorbs from stress on every side when the extrusion molding frame, has the effect of saving metallic sheet material simultaneously.

That is, at Fig. 8, D ₁For making the needed internal diameter in space, D ₂For forming the needed magnetic conductor volumetric diameter of magnetic flux between the space, D ₃For disperseing absorption to be added on the inside needed internal diameter of stress in outside, D ₄Outside dimension for metallic plate.By increasing D ₃, or increase the number of open-work 10 and make the actual volume of metallic plate reduce to minimum and need limit, and make the loud speaker lightweight.

Fig. 9 represents metallic plate shown in Figure 87 is installed on a embodiment when having the frame 6 that penetrates frame bottom fully.At this moment, metallic plate still embeds earlier in the frame bottom, and carries out rotary pressing processing from the outside of frame or carried out extrusion molding and be fixed by metal pattern.

Figure 10 is in example of the present invention, on the metallic plate peripheral side laterally be provided with rag 11 time the metallic plate front elevation.

Figure 11 has the metallic plate front elevation of the rag 12 that is carved into knurling tool in other embodiments of the invention at peripheral side.

When being illustrated in the use metal pattern with process profile, Figure 12 frame is fixed in the example of metallic plate by means of extrusion molding.

In with figure, 13 is patrix, and 14 is counterdie, and 15 is that the hole is used in perforation.Metallic plate 7, frame 6 are inserted implementation extruding (or riveted joint) between patrix 13 and the counterdie 14.In advance hard steel loop 16 is installed in the part of contacting metal plate side of the extruding (riveted joint) of patrix 13, in the time of in frame is crushed on patrix, the lifting force of opposing steel loop and make the frame riveted joint.Can obtain needed riveting intensity by changing steel loop intensity and steel loop diameter.

Figure 13 represents according to the profile with electrodynamic type external magnetic type loud speaker one example of metallic plate frame mounting structure of the present invention.

6 is frame, and 7 for embedding the annular metal sheet of frame inner bottom part, fixes by side extruding (riveted joint).18 is magnet, and 17 is yoke, and 19 is cone (oscillating plate), and 20 is enclosing cover, and 21 is flashboard.

According to the illustrated the present invention of above-described embodiment, can obtain following effect.

(1) metallic plate and combining of frame be by means of extruding or riveted joint so that for the additional power in metallic plate side, therefore needn't the complexed metal plate and the size of frame, both can be close to combination, have increased mechanical strength.

(2) metallic plate is not that frame is pressed into, so frame can not be reamed and produce iron powder, or produces distortion, and iron powder can not enter the space yet.

(3) according to above-mentioned (1) (2) item, can not produce and engage bad resonance sound, can obtain the good loud speaker of tonequality.

(4) owing to be provided with rag in the metallic plate side, extruding or riveted joint frame above it and make in conjunction with more firm.

(5) stress when boring open-work around the metallic plate and absorb extruding can be saved unnecessary material simultaneously.

(6), thereby directly magnet is installed on the metallic plate in the past in order between metallic plate bottom and frame, to have the space.But in the present invention, can guarantee the metallic plate internal diameter by means of the processing method of extruding or riveted joint frame side, and because of the metallic plate bottom surface combines with the certain of frame, and it is excitatory after for metallic plate installation magnet by frame (consulting Fig. 3) to be situated between.

Therefore, the degree of freedom of loudspeaker design can be increased, thereby high-performance, high-quality loud speaker can be obtained.

The present invention also can be applicable to all dynamic speakers.

The present invention is not limited to external magnetic type, also can be applicable to the loud speaker of internal magnetic type.

More can bring into play effect when especially the present invention being used for the loud speaker of automobile audio.

The simple declaration of accompanying drawing:

Fig. 1 to Fig. 3 is the profile of the metallic plate frame integrated structure example of existing loud speaker.

Fig. 4 to Figure 13 is embodiments of the invention.

Wherein, Fig. 4, Fig. 5 is the process profile of a part of metallic plate rack process of expression.

Fig. 6 is the plane graph of a kind of shape of expression metallic plate.

Fig. 7 is the metallic plate frame oblique view after assembling.

Fig. 8 is the plane graph of the another kind of shape of expression metallic plate.

Fig. 9 is the profile of other embodiment of expression metallic plate frame.

Figure 10, Figure 11 are front (side) figure of other shapes of expression metallic plate.

Figure 12 is the schematic diagram of metallic plate rack process, and the profile of the shape of extrusion die.

Figure 13 is for being suitable for the profile of external magnetic type dynamic speaker of the present invention.

1 ... metallic plate, 2 ... frame, 3 ... connecting portion, 4 ... the space, 5 ... the metallic plate that is fillet, 6 ... frame, 7 ... metallic plate, 8 ... rag, 9 ... open-work (space), 10 ... open-work, 11 ... horizontal rag, 12 ... the knurling tool rag, 13 ... patrix, 14 ... counterdie, 15 ... the hole, 16 ... steel loop, 17 ... yoke, 18 ... magnet, 19 ... cone (oscillating plate), 20 ... enclosing cover, 21 ... flashboard.

Claims (5)

1, a kind of loud speaker comprises, one comprises the magnetic loop of magnet, metallic plate etc., one comprises oscillating component that moving coil, vibration pull etc. and the frame that supports above-mentioned metallic plate and oscillating plate in the outside, it is characterized by, above-mentioned metallic plate is placed into the bottom of frame so that to its side reinforcing, or by means of the riveted joint combination.

2, according to the loud speaker of claim 1, wherein above-mentioned metallic plate is provided with rag along the side, by extruding or riveted joint frame is connect thereon.

3, according to the loud speaker of claim 1 or 2, wherein above-mentioned metallic plate is along the open-work of one Zhou Youke mitigation from the periphery extrusion stress.

4, a kind of manufacture method of loud speaker; it is characterized by; when in conjunction with the metallic plate of loud speaker and frame; the plate-shape metal plate is placed the bottom of frame; and embed the bottom that forms recess with loose state, by extrusion die or by rotary pressing processing to fixed frame bottom, metal pattern side additional stress ground.

5, according to the autofrettage of the loud speaker of claim 4, wherein, at the additional rag in the side of above-mentioned metallic plate, then frame is pushed on it in advance.

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