JP4893798B2 - Speaker - Google Patents

Description

  The present invention mainly relates to a speaker used as a receiver of a mobile phone or the like.

  The prior art will be described with reference to FIG. FIG. 3 is an exploded perspective view of a speaker used as a receiver for a mobile phone. According to the figure, 1 is a cylindrical yoke with a magnet 2 mounted on the bottom surface, and 3 is superimposed on the magnet 2 and coupled. A ring-shaped magnetic gap (not shown) is formed by the inner wall of the cylindrical yoke 1 and the side surface of the upper plate 3, and the yoke 1, the magnet 2 and the upper plate 3 form a magnetic circuit. 4 is formed.

  Reference numeral 6 denotes a diaphragm having a voice coil 6a mounted substantially at the center thereof, and 7 denotes a case made of a resin material in which the magnetic circuit 4 is insert-molded.

  In addition, the external connection terminal 8 and the internal connection terminal (not shown) connected to the lead wire of the voice coil 6a connected to the external connection terminal 8 are integrated into the case 7 by insert molding.

  The diaphragm 6 has the voice coil 6a fitted in the magnetic gap of the magnetic circuit 4, and the outer periphery thereof is joined to the case 7 with an adhesive.

  Reference numeral 10 denotes a protector to which a braking cloth 10a is attached, which suppresses an excessive amplitude of the diaphragm 6 at the time of resonance.

  The speaker configured as described above inputs an audio signal to the voice coil 6a through the external connection terminal 8 through the internal connection terminal, and drives the voice coil 6a up and down to vibrate the diaphragm 6 to generate sound. .

  In recent years, the size of the display unit has been increased due to the increase in the number of functions of mobile phone devices, and a smaller speaker has been required due to the demand for space saving in the receiver part. However, it is difficult to stabilize the sound quality, and the problem is to solve the deterioration of the sound quality and the decrease of the sound pressure.

  In order to solve the above-described problems, the present invention aims at practical use of a rectangular speaker having a narrow width, and intends to solve the above problems by effectively using the space factor of a mobile phone.

In order to solve the above-mentioned problems, the speaker of the present invention is provided with a casing in which opening surfaces are provided at the top and bottom of a substantially rectangular shape body, and terminals are formed by insertion at the short side portions at both ends, and a substantially rectangular shape is formed inside this. A voice coil wound and electrically connected at both ends to the terminal, joined to the upper end surface of the voice coil, and a diaphragm attached to the upper opening surface, and at least electrically connected to the terminal and lead lines of the connected voice coils, wherein mounted on the lower opening surface, the voice coil is constituted by a substantially rectangular magnetic circuit having a magnetic gap to be fitted, before SL terminal corner portion in the housing a speaker located, together with the corner portion of at least the magnetic gap is open to the outside, the lead wire so as to overlap with the corner portion when viewed from above, the voice Yl extending from co over Na portion of the body outwardly, when extended from the vicinity of the lower end portion of the voice coil, together with the lead wire is extended through the corner portion from the magnetic gap, the voice coil when extended from near the top end, the lead line are those wherein lead line even during vertical movement or at the maximum amplitude of the voice coil is extended so as not to collide with the magnetic circuit, speaker driving time The voice coil can be smoothly moved up and down.

As described above, in the speaker of the present invention, at least the corner portion of the magnetic gap is opened outward, and the lead wire overlaps with the corner portion when viewed from above, so that the corner portion of the voice coil main body is overlapped. When the lead wire extends from the magnetic gap through the corner portion and extends from the vicinity of the upper end of the voice coil. In addition, since the lead wire is extended so that the lead wire does not collide with the magnetic circuit section even when the voice coil moves up and down or at the maximum amplitude, the voice coil moves up and down smoothly when the speaker is driven. It can be done.

  Therefore, it is possible to provide a narrow rectangular speaker that effectively uses space in a mobile phone or the like.

(A) The exploded perspective view of the receiver of one Embodiment of the speaker of this invention, (b) The perspective view of the state which turned over the housing | casing which is the principal part. The exploded perspective view of the magnetic circuit part which is the principal part Exploded perspective view of a conventional speaker

  Hereinafter, an embodiment of a speaker according to the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1A is an exploded perspective view of a receiver according to an embodiment of the speaker of the present invention, and FIG. FIG. 3 is an exploded perspective view of a magnetic circuit unit which is the main part.

  According to the figure, reference numeral 20 denotes a substantially rectangular housing formed by resin molding with the upper and lower surfaces being open surfaces, and one end of each short side is exposed on the housing to form an internal connection portion 21a. The terminal 21 having the other end serving as the external connection portion 21b is integrally formed when the casing 20 is molded by insert molding. The internal connection portion 21a is set so as to be located at a corner portion at the short side end of the casing 20, and the upper surface is coated with solder as necessary to connect the lead wire 22a of the voice coil 22 to the electrical connection. The reliability of the connection is secured.

  The voice coil 22 disposed in the housing 20 has a shape in which a lead wire 22a is drawn out from a substantially corner portion of the body of the voice coil 22, and an end 22c is soldered to the internal connection portion 21a. (Not shown).

  Furthermore, the lead wire 22a is pulled by the lead wire 22a in the vertical movement by providing a difference in height (increasing the internal connection portion 21a) between the lead-out portion of the voice coil 22 from the main body and the internal connection portion 21a. This further contributes to the improvement of acoustic characteristics as a speaker, such as an improvement in output by improving the amplitude of the diaphragm 23 described later (not shown).

  The diaphragm 23 has an upper end of the voice coil 22 wound in the rectangular shape bonded and bonded to the center, and a peripheral edge thereof is bonded and bonded to the casing 20 to cover the upper opening surface of the casing 20.

  Reference numeral 24 denotes a protector provided with a plurality of small holes 24a, which is attached to the casing 20 so as to cover the diaphragm 23 in a state in which a braking cloth 24b is adhered to the outer surface thereof. The protector 24 protects the diaphragm 23 from external force, and the braking cloth 24b suppresses an excessive amplitude at the time of resonance of the diaphragm 23.

  It is possible to delete the brake cloth 24b by drilling a plurality of minute holes by laser irradiation without providing the small holes 24a in the protector 24, and this laser irradiation drilling process is performed during the speaker assembly process. By providing, the change of the diaphragm 23 due to the difference in the acoustic characteristics of the speaker and the change of the braking cloth 24b due to the difference in the resonance frequency associated therewith can be handled only by changing the drilling conditions by laser irradiation in the assembly process, thereby improving productivity. It is also possible to contribute to the reduction of the number of parts.

  A rectangular magnetic circuit unit 25 is formed by integrally bonding a rectangular magnet 25b and a rectangular upper plate 25c by adhesive bonding on a yoke 25a formed by bending a plate-shaped magnetic material. A magnetic gap 25e into which the voice coil 22 is fitted is provided between a wall portion 25d formed by bending the yoke 25a.

  As described above, the magnetic circuit unit 25 is press-fitted and held in the opening on the lower surface of the housing 20 so that a part of the voice coil 22 attached to the housing 20 by the diaphragm 23 is fitted into the magnetic gap 25e. Then, it is fixed by applying an adhesive.

  At this time, since the wall portion 25d of the yoke 25a is formed by bending, each corner portion 25f has a gap, and the magnetic gap 25e is opened outward by the corner portion 25f. The lead wire 22a extended from the corner portion of the coil 22 is drawn out of the magnetic circuit portion 25 so as to overlap with the corner portion 25f of the magnetic gap 25e as viewed from above.

  That is, when the lead wire 22a extends from the vicinity of the lower end portion of the voice coil 22, it extends from the magnetic gap 25e through the corner portion 25f to the outside of the magnetic circuit portion 25, and the lead wire 22a is near the upper end of the voice coil 22. When the voice coil 22 is moved up and down or at the maximum amplitude when the speaker is driven, the lead-out portion of the lead-out wire 22a from the main body of the voice coil 22 is positioned even in the magnetic gap 25e. Since the wire 22a does not collide with the magnetic circuit portion 25, there is no abnormal noise called a so-called magnetic gap defect.

  In addition, since the lead-out position of the lead-out line 22a does not take into consideration the collision with the magnetic circuit unit 25, it can contribute to the reduction in the thickness of the speaker.

  The yoke 25a is described as having four surfaces formed by bending the wall portion 25d. However, although the magnetic efficiency is slightly reduced, the wall portion on the short diameter side is not formed, so that the housing of the magnetic circuit portion 25 is formed. Positioning at the time of press-fitting into 20 becomes easy, and the number of assembling steps at the time of speaker assembly can be improved.

  In the above embodiment, the description has been made on the assumption that the voice coil 22 is wound in a rectangular shape. However, the casing 20 has openings on the upper and lower surfaces, and the magnetic circuit unit 25 also includes the diaphragm 23 and the voice coil. The lower mold convex portion (not shown) is formed by projecting the voice coil 22 from the lower opening surface of the casing 20 into the casing 20 because it is press-fitted after the mounting of the casing 22 to the casing 20. Is formed in a rectangular shape with the heat coil layer on the surface of the voice coil 22 heated and solidified so that the voice coil 22 is in the housing 20 or slightly protruded, and then bonded to the diaphragm 23. It is also possible to avoid the deformation due to the handling during the conveyance of the voice coil 22 and the complexity of the handling by preparing the voice coil 22 as a work-in-progress in advance.

  The narrow rectangular speaker according to the present invention can be used for a small electronic device that effectively uses a space such as a mobile phone.

20 Housing 21 Terminal 21a Internal connection portion 21b External connection portion 22 Voice coil 22b Bending portion 23 Diaphragm 25 Magnetic circuit portion 25e Magnetic gap 25f Corner portion

Claims (2)

Opening surfaces are provided at the top and bottom of a substantially rectangular shape body, and a housing in which terminals are insert-molded on the short sides of both ends, respectively, are wound in a substantially rectangular shape inside, and both ends are electrically connected to the terminals. A voice coil, a diaphragm attached to the upper end surface of the voice coil and attached to the upper opening surface, a lead line of the voice coil electrically connected to at least the terminal, and the lower opening surface is mounted on the voice coil is constituted by a substantially rectangular magnetic circuit having a magnetic gap to be fitted, before SL terminal is a speaker located at a corner portion in the housing, a corner portion of at least the magnetic gap together with opened outwardly, said lead line is to overlap with the corner portion when viewed from above, extends outwardly from the co over Na portion of the voice coil body, wherein When extending from the vicinity of the lower end portion of the chair coil, the lead wire extends from the magnetic gap through the corner portion, and when extending from the vicinity of the upper end of the voice coil, the lead wire extends above and below the voice coil. A speaker extended so that the lead-out line does not collide with the magnetic circuit section even when moving or at maximum amplitude . The speaker according to claim 1, wherein a vertical difference is provided between an electrical connection point on the voice coil main body side and an electrical connection point on the terminal side of the extended lead wire.

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