JP2006109123A - Speaker and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker with high quality by solving the problem of deteriorated size precision and productivity, the speaker being formed by arranging frames each including a magnetic circuit in upper/lower symmetry through a diaphragm inbetween opposite to each other and coupling them. <P>SOLUTION: The speaker comprises the first frame including: the magnetic circuit; the diaphragm 4 the center of which is coupled with a voice coil 3 arranged closely to an upper part of the magnetic circuit in a non-contactless state and the outer circumference of which is coupled with the circumferential edge of the first frame 1; and the second frame 5 arranged opposite to the first frame 1 in an upper lower symmetry via the diaphragm 4 and including the magnetic circuit, and the speaker is configured such that an engagement part 1b whose cross section is formed in a channel shape is provided at circumferential edges of two opposed sides of the first frame 1 and the circumferential edge of the second frame 5 is slidably fitted and coupled to the engagement part 1b. Since the engagement part 1b warrants the size precision higher-dimensionally and provides very easy coupling, the productivity can remarkably be enhanced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a speaker used for various kinds of audio equipment, electronic equipment, mobile phones, and the like, and a manufacturing method thereof.

  In recent years, with regard to small electronic devices and mobile phones, while further miniaturization has progressed, higher sound quality has also been demanded, and the speakers mounted on such devices are similarly thinner, Slimming and higher sound quality are required.

  FIG. 4 is an exploded perspective view showing the configuration of this type of conventional slim type speaker, and FIG. 5 is a cross-sectional view of the same, proposed by the present applicant as a slim type speaker.

  4 and 5, reference numeral 10 denotes a rectangular first frame made of a magnetic metal material, 10a denotes a rectangular recess provided in the center of the first frame 10, and 11 denotes a rectangular first frame. A first magnetic circuit is configured by fitting the first magnet 11 into a recess 10 a provided in the first frame 10 and coupling the first magnet 11, and the outer peripheral surface of the first magnet 11. A first magnetic gap 11a is formed with a uniform gap between the first frame 10 and the inner wall surface of the recess 10a of the first frame 10.

  Reference numeral 12 denotes a voice coil. The voice coil 12 is formed by winding a coil 12b having a desired pattern in a rectangular shape on a front surface and a back surface of a polyimide base material 12a by copper plating. The first magnetic gap 11a is formed in substantially the same shape as the first magnetic circuit. Reference numeral 12c denotes a lead wire lead-out portion for connecting the coil 12b to a terminal (not shown).

  Reference numeral 13 denotes a resin track type diaphragm. The diaphragm 13 has a flat plate-like main body portion 13a at the center, an edge portion 13b at the peripheral edge of the main body portion 13a, and a flat plate shape at the peripheral edge of the edge portion 13b. The affixing part 13c is formed in an integral structure, and the voice coil 12 is coupled to the main body part 13a, and the affixing part 13c is coupled to the periphery of the first frame 10.

  Reference numeral 14 denotes a rectangular second frame made of a magnetic metal material, reference numeral 14a denotes a rectangular recess provided in the center of the second frame 14, and reference numeral 15 denotes a second magnet. Is fitted into a recess 14a provided in the second frame 14 to form a second magnetic circuit, and the outer peripheral surface of the second magnet 15 and the recess 14a of the second frame 14 are formed. A second magnetic gap 15a is formed with a uniform gap between the inner wall surface and the inner wall surface.

  Then, the second frame 14 having the second magnetic circuit configured as described above is opposed to the first frame 10 having the first magnetic circuit via the diaphragm 13 in a vertically symmetrical manner. In this way, the coil 12b of the voice coil 12 is arranged between the first magnetic gap 11a and the second magnetic gap 15a.

  In the conventional speaker configured in this manner, the first magnet 11 and the second magnet 15 are magnetized in the thickness direction and in the direction in which each repels, and the first magnetic gap 11a and the second magnet 15 are magnetized. By arranging the coil 12b of the voice coil 12 at a position where the leakage magnetic field generated from the gap 15a can be utilized to the maximum, the voice coil 12 is caused to swing up and down by inputting a voice signal to the voice coil 12, thereby The diaphragm 13 to which the coil 12 is coupled is configured to perform sound reproduction with amplitude.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
Japanese Patent Laid-Open No. 2004-88739

  However, in the above conventional speaker, the second frame 14 provided with the second magnetic circuit is disposed opposite to the first frame 10 provided with the first magnetic circuit symmetrically through the diaphragm 13. Since it is the structure to couple | bond together, since the positioning of the 1st flame | frame 10 and the 2nd flame | frame 14 was difficult at the time of this coupling | bonding, it had the subject that it was difficult to maintain a dimensional accuracy at a high level.

  Further, since the first frame 10 and the second frame 14 are bonded using an adhesive, the first frame 10 and the second frame 14 are cured until the adhesive is dried. It had to be fixed using a tool or the like, and for this reason, there was a problem that productivity including the cost of a jig or the like was poor.

  An object of the present invention is to solve such a conventional problem and to provide a speaker excellent in dimensional accuracy and productivity and a manufacturing method thereof.

  In order to solve the above-described problems, the present invention provides a first frame having a magnetic circuit having a magnetic gap, a voice coil disposed in close proximity to the magnetic gap above the magnetic gap, and the voice coil. And a diaphragm whose outer peripheral portion is coupled to the periphery of the first frame, and a magnetic circuit having a magnetic gap, are arranged symmetrically opposite to the first frame via the diaphragm. In the speaker composed of the second frame, an engagement portion having a U-shaped cross section is provided on the periphery of two opposing sides of either the first frame or the second frame so that the respective opening portions face each other. In addition, two frames are joined by fitting the peripheral edge of the other frame into the engaging portion.

  As described above, the speaker according to the present invention can be coupled to the engaging portion provided at the peripheral edge of one frame by simply fitting the peripheral edge of the other frame so that the dimensional accuracy is improved by the engaging portion. Can be ensured at a high level, and the two frames can be joined very easily, so that a significant improvement in productivity can be achieved.

(Embodiment)
Hereinafter, the invention described in the entire claims of the present invention will be described by using embodiments.

  1 is an exploded perspective view showing a configuration of a speaker according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional perspective view thereof, and in FIGS. A rectangular first frame 1a is a rectangular recess provided in the central portion of the first frame 1, and 1b is a cross-sectional core provided on the periphery of two opposing sides of the first frame 1. It is a character-shaped engaging part, The U-shaped part of this engaging part 1b is formed so that each opening part may oppose.

  Reference numeral 2 denotes a rectangular first magnet, and the first magnet 2 is fitted into a recess 1a provided in the first frame 1 to form a first magnetic circuit. A first magnetic gap 2 a is formed between the outer peripheral surface of the first magnet 2 and the inner wall surface of the recess 1 a of the first frame 1 with a uniform gap.

  Reference numeral 3 denotes a voice coil. The voice coil 3 is formed by winding a coil 3b of a desired pattern in a rectangular shape on the front and back surfaces of a polyimide base material 3a by copper plating. The first magnetic gap 2a formed in the first magnetic circuit is formed in substantially the same shape. 3c is a lead wire lead-out portion for connecting the coil 3b to a terminal (not shown).

  Reference numeral 4 denotes a resin track type diaphragm. The diaphragm 4 has a flat plate-like main body 4a at the center, an edge 4b at the periphery of the main body 4a, and a flat plate at the periphery of the edge 4b. The affixing part 4c is formed in an integral structure, and the voice coil 3 is coupled to the main body part 4a, and the affixing part 4c is coupled to the periphery of the first frame 1.

  Reference numeral 5 denotes a rectangular second frame made of a magnetic metal material, 5a denotes a rectangular recess provided in the center of the second frame 5, and 6 denotes a rectangular second magnet. The magnet 6 is fitted into a recess 5a provided in the second frame 5 to be coupled to constitute a second magnetic circuit, and the outer peripheral surface of the second magnet 6 and the second frame 5 A second magnetic gap 6a is formed with a uniform gap between the inner wall surface of the recess 5a.

  The second frame 5 having the second magnetic circuit configured as described above is disposed symmetrically opposite to the first frame 1 with the diaphragm 4 interposed therebetween, whereby the diaphragm 4 The peripheral pasting portion 4c is coupled so as to be sandwiched between the peripheral edge of the first frame 1 and the peripheral edge of the second frame 5, and the coil 3b of the voice coil 3 coupled to the diaphragm 4 is connected to the first magnetic gap 2a. And the second magnetic gap 6a.

  The loudspeaker according to the present embodiment configured as described above can be coupled simply by fitting the engaging portion 1b provided on the periphery of the first frame 1 so that the periphery of the second frame 5 slides. Therefore, the engagement portion 1b can guarantee dimensional accuracy at a high level, and the two frames can be joined very easily, so that the productivity can be greatly improved. The effect of is obtained.

  In the present embodiment, the engaging portion 1b provided on the periphery of the first frame 1 is U-shaped in cross section, and the periphery of the second frame 5 fitted into the engaging portion 1b is flat. However, the present invention is not limited to this, and any shape can be used as long as it can be positioned and coupled.

  Moreover, in this Embodiment, although demonstrated with the structure which provided the engaging part 1b in the periphery of the 1st flame | frame 1, this invention is not limited to this, The engaging part 1b is 2nd. It may be provided at the periphery of the frame 5.

  Also, by applying an adhesive to the joint between the first frame 1 and the second frame 5, the joint strength can be further stabilized.

  The speaker according to the present invention has a special effect that it can guarantee dimensional accuracy at a high level and can greatly improve the productivity, and can be applied to various kinds of audio equipment, electronic devices, mobile phones, and the like. It is useful as a speaker used.

The disassembled perspective view which showed the structure of the speaker by one embodiment of this invention Cross section Same sectional perspective view Exploded perspective view showing the configuration of a conventional speaker Cross section

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st frame 1a, 5a Concave part 1b Engagement part 2 1st magnet 3 Voice coil 3a Base material 3b Coil 3c Lead wire drawer | drawing-out part 4 Diaphragm 4a Main body part 4b Edge part 4c Adhering part 5 2nd frame 6 Second magnet

Claims (5)

A first frame having a magnetic circuit having a magnetic gap; a voice coil disposed in close proximity to the magnetic gap in a non-contact manner on the magnetic gap; and the outer periphery of the voice coil coupled to the voice coil. In a loudspeaker comprising a diaphragm coupled to the periphery of one frame and a second frame provided with a magnetic circuit having a magnetic gap and arranged symmetrically opposite to the first frame via the diaphragm, An engaging portion having a U-shaped cross section is provided on the periphery of two opposing sides of either the first frame or the second frame so that the respective opening portions face each other. A speaker that combines two frames by fitting the periphery. The peripheral edge of the other frame fitted into the engaging portion having a U-shaped cross section provided on the peripheral edge of two opposing sides of either the first frame or the second frame is a flat plate shape. Speaker. The speaker according to claim 1, wherein an adhesive is applied to a joint portion between the first frame and the second frame. Assembling a first frame having a magnetic circuit having a magnetic gap, coupling the voice coil and the diaphragm, coupling the diaphragm coupled with the voice coil to the first frame, and magnetic gap A method for manufacturing a speaker comprising the steps of assembling a second frame having a magnetic circuit having the following: and combining the first frame and the second frame. The step of joining the first frame and the second frame is carried out by sliding the peripheral edge of the other frame on the engaging portion having a U-shaped cross section provided on the peripheral edge of two opposing sides of the one frame. The method for manufacturing a speaker according to claim 4, wherein the method is performed by inserting the speaker.

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