JP3966346B2 - Speaker - Google Patents

Description

  The present invention relates to a voice coil bobbin used for various acoustic devices and a speaker using the same.

  A conventional speaker will be described with reference to FIGS. 3 is a side sectional view of a conventional speaker, FIG. 4 is a perspective view of a voice coil bobbin used in the speaker, FIG. 5 is a top view thereof, and FIG. 6 is a perspective view of another voice coil bobbin. .

  According to the figure, 1 is a magnetic circuit comprising upper and lower plates and a magnet, 2 is a frame attached to the magnetic circuit 1, 3 is an outer periphery coupled to the frame 2, and an inner periphery is a voice coil bobbin 4 Is a diaphragm coupled to the. Reference numeral 5 denotes a damper whose outer periphery is coupled to the frame 2 and whose inner periphery is coupled to the voice coil bobbin 4 so that a part of the voice coil bobbin 4 is fitted in the magnetic gap 1 a of the magnetic circuit 1.

  A voice coil 4a is wound around a portion of the voice coil bobbin 4 fitted in the magnetic gap 1a to constitute a speaker.

  Next, the voice coil will be described with reference to FIGS. 4 and 5. The voice coil bobbin 4 is formed by curling a bobbin sheet 4c having a rectangular shape such as hard aluminum, paper, and kapton, and the voice coil 4a is formed by a winding jig. The so-called voice coil (the voice coil bobbin 4 is wound around the voice coil 4a) as a speaker component is constructed by winding and pasting the reinforcing paper 4b on the upper part of the voice coil bobbin 4.

  Further, as shown in FIG. 6, paper is bonded in a spiral shape to form a circular paper tube, the paper tube is cut to obtain a voice coil bobbin 4g, and the voice coil bobbin 4g is provided with the voice coil 4a as described above. What was wound and comprised what was called a voice coil was used.

  However, the conventional voice coil bobbins 4 and 4g of this type have a problem that it is difficult to design a high input resistance and the quality is not stable due to a gap defect in the production process.

  This is because, after the completion of the voice coil bobbin 4 composed of the bobbin sheet, the restoring force by the spring back that the bobbin sheet always tries to return to the original sheet shape acts, so it is fixed by the reinforcing paper 4b. However, since the roundness cannot be secured and the voice coil bobbin 4 has a curved shape as shown in FIG. 5, the shape stability performance is poor, and the voice coil bobbin 4 is arranged in the center of the magnetic gap 1a over the circumference. This makes it difficult to achieve high input resistance in design. That is, when the voice coil 4a is not arranged at the center of the magnetic gap 1a and even a part of one circumference is slightly decentered, the voice coil bobbin 4 has a large amplitude when a large input is applied. Due to the distortion, the voice coil bobbin 4 is in contact with the magnetic gap 1a, and the gap defect is likely to occur. Further, this phenomenon has a problem that not only a problem of high input resistance but also a gap defect in a general speaker production process is likely to occur.

  Next, in the case of the voice coil bobbin 4g in FIG. 6, since it is bonded in a spiral shape, a large force is applied to the joint of the voice coil bobbin 4g when a large input is applied, and there is a problem that a gap defect is likely to occur due to buckling. It was a thing.

  An object of the present invention is to solve such a conventional problem, to provide an excellent voice coil bobbin which can achieve high input resistance and is very stable in quality.

In order to solve the above-mentioned problem, the voice coil bobbin of the present invention is configured by curling and bouncing three or more bobbin sheets, and connecting at least the butted portions with a reinforcing paper, thereby providing a restoring force by springback. The roundness or the shape stability is improved by preventing the deformation of the bobbin by dispersing the bobbin sheets over the three or more bobbin sheets. After the voice coil bobbin is completed, the bobbin sheet is always restored to the original one. Dispersion of the restoring force due to the spring back to return to the seat shape and the restoring force due to the spring back generated by the curling process is made by dividing the bobbin seat into three or more sheets to prevent deformation of the voice coil bobbin, and the gap In addition to preventing the generation of abnormal sounds due to defects, it is possible to increase the input resistance.

The voice coil bobbin of the present invention comprises three or more bobbin sheets that are curled and butted together, and at least the butted portions are joined together by reinforcing paper , and the restoring force by springback is the plurality of three or more sheets. The spring is designed to improve roundness or shape stability by preventing the deformation of the bobbin by dispersing it on the bobbin sheet , and after the completion of the voice coil bobbin, the bobbin sheet always returns to its original sheet shape. The restoring force due to the back and the restoring force due to the springback that occurs during curling processing are dispersed by making the bobbin seat into 3 or more sheets to prevent deformation of the voice coil bobbin, and abnormal sound due to gap failure is generated In addition to preventing this, high input resistance can be achieved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of an embodiment of a voice coil bobbin of the present invention, and FIG. 2 is a top view thereof.

  According to the figure, reference numerals 11a, 11b, and 11c are bobbin sheets made of hard aluminum that are press-molded in a circular arc shape, and these are joined together by a reinforcing paper 12 provided with a slit and applied with an adhesive, and the voice coil bobbin 11 Is formed. A voice coil 13 is wound around the voice coil bobbin 11 and incorporated in a speaker (not shown).

  In the voice coil bobbin 11 described above, the bobbin sheets 11a, 11b, and 11c made of hard aluminum are divided into three parts to suppress the spring back during processing into an arc shape, so that the roundness and shape stability of the voice coil bobbin 11 are good. Thus, it is possible to increase the input resistance of the speaker and to reduce the gap defect when assembling the speaker.

  Furthermore, the arc shape is processed by heat-pressing in advance to stabilize it, and by using a bobbin sheet that has been processed in advance to stabilize the shape, the restoring force of the voice coil bobbin is further suppressed to prevent deformation. Therefore, it is possible to contribute to higher input resistance of the speaker.

  Depending on the type of speaker, the number of bobbin sheets divided according to the shape and material of the voice coil bobbin is also selected as appropriate, and depending on the shape, prior heat press molding is not required, and multiple bobbin sheets are just abutted and joined. Thus, it is possible to suppress the spring back to achieve the object of the present invention, and it goes without saying that such a thing is also within the technical scope of the present invention.

  Further, in the above embodiment, the speaker is not particularly mentioned, but the speaker with improved input resistance is obtained by using the voice coil bobbin 11 of the present invention instead of the voice coil bobbin 4 of the general speaker described in the prior art. Can be provided.

  A voice coil bobbin used in various acoustic devices according to the present invention and a speaker using the voice coil bobbin prevent deformation of the voice coil bobbin, prevent occurrence of abnormal sound due to a gap defect, and enable high input resistance. It can be applied to a speaker using this.

The perspective view of one Embodiment of the voice coil bobbin of this invention Top view Side view of a conventional speaker A perspective view of a conventional voice coil bobbin Top view Perspective view of other voice coil bobbins

Explanation of symbols

11 Voice coil bobbin 11a, 11b, 11c Bobbin sheet 12 Reinforcement paper 13 Voice coil

Claims (3)

Three or more bobbin sheets of three or more are curled and butted together, and at least the butted part is joined by a reinforcing paper , and the restoring force by springback is distributed to the three or more bobbin sheets of the above. A voice coil bobbin with improved roundness or shape stability by preventing deformation of the bobbin. 2. The voice coil bobbin according to claim 1, wherein a bobbin sheet whose shape has been stabilized by heat press molding in advance is used. A magnetic circuit having a magnetic gap, a frame attached to the magnetic circuit, an outer periphery is coupled to the frame, an inner periphery is fitted into the magnetic gap, and a voice coil is further wound. A speaker comprising a diaphragm coupled to the voice coil bobbin according to 2.

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