JP4877378B2 - 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. 4 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.

  The case 7 has an external connection terminal 8 and an internal connection terminal (not shown) connected to the lead wire of the voice coil 6a connected to the case 7 integrated on the bottom surface 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 a voice signal to the voice coil 6a via the internal connection terminal through the external connection terminal 8 provided on the lower surface of the case 7, and drives the voice coil 6a up and down to vibrate the diaphragm 6. Amplifies and pronounces.

  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-described problems, the speaker of the present invention is provided with opening surfaces on the top and bottom of a substantially rectangular shape body, one end is exposed at each short side portion to form an internal connection portion, and the other end is an external connection portion. A case in which a molded terminal is insert-molded, a voice coil wound in a substantially rectangular shape therein, and both ends electrically connected to the internal connection portion at the exposed portion, and an upper end surface of the voice coil And a speaker configured by a diaphragm mounted on the upper opening surface and a substantially rectangular magnetic circuit unit mounted on the lower opening surface and provided with a magnetic gap into which the voice coil is fitted. The exposed portion is located on the upper surface of the casing and at a corner portion of a short side, and the lead wire of the voice coil is directly soldered to the internal connection portion at the exposed portion, and the exposed portion Part Surface is covered with the solder, the lead wire is approximately the exposed side corner portion from said corner portion on the same side as the exposed portion side corner portion side in the short side of the corner portion of the voice coil body Since it extends in the direction of the opposite corner and is bent in the direction of the exposed portion, the voice coil can be smoothly moved up and down during driving of the speaker, and the electrical connection between the internal connection portion and the lead wire can be performed. It is possible to ensure the reliability of the general connection.

As described above, the speaker according to the present invention has a voice coil lead wire that is electrically connected to the exposed portion of the terminal provided on the upper surface of the casing and at the substantially corner portion of the short side. The connection portion is directly soldered and the upper surface of the exposed portion is covered with the solder, and the lead wire is on the same side as the exposed portion side corner portion side of the substantially corner portion of the voice coil body . Since the corner extends from the corner toward the corner opposite to the exposed portion on the short side, and bent toward the exposed portion, the upper and lower sides of the voice coil when driving the speaker The moving operation can be performed smoothly, and the reliability of the electrical connection between the internal connection portion and the lead wire can be ensured.

  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. Top view for explaining the relationship between the main part of the casing and the voice coil The exploded perspective view of the magnetic circuit part which is the principal part Exploded perspective view of a conventional speaker

  An embodiment of the speaker of the present invention will be described below 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. 1B is a perspective view of the casing 20 which is the main part in an inverted state. FIG. 3 is a top view for explaining the relationship between a casing and a voice coil which are the main parts, and FIG. 3 is an exploded perspective view of a magnetic circuit part which is the main parts.

  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 is exposed on the housing at the upper surface of both ends and the short sides. The terminal 21 that becomes the connection portion 21a and the other end becomes the external connection portion 21b is integrally formed at the time of molding the casing 20 by insert molding. The internal connection portion 21a is set so as to be positioned on the upper surface of the casing 20 and at the corner portion at the end of the short side, and the upper surface is covered with a solder as necessary to lead out the voice coil 22. The reliability of the electrical connection with 22a is ensured.

The voice coil 22 disposed in the casing 20 has a lead wire 22a drawn out from a substantially corner portion of the main body of the voice coil 22, and is on the upper surface of the casing 20 and opposite to the short side internal connection portion 21a. It extends to the vicinity of the side corner portion , and the end 22c is soldered to the internal connection 21a.

  Further, since the lead wire 22a extends from a substantially corner portion and is connected by soldering, the lead wire 22a is lengthened to ensure a pull margin for the vertical movement of the voice coil 22 when the speaker is driven. Smooth drive is possible. 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. It further contributes to the improvement of acoustic characteristics as a speaker, such as an increase in output by improving the amplitude of the diaphragm 23 described later.

  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 (3)

An opening is provided on the upper and lower sides of a substantially rectangular body, one end is exposed at each short side portion to form an internal connection portion, and a terminal having an end connected to the other end as an external connection portion is inserted into the housing. A voice coil wound in a rectangular shape and having both ends electrically connected to the internal connection portion at the exposed portion, and a diaphragm that is joined to the upper end surface of the voice coil and attached to the upper opening surface And a substantially rectangular magnetic circuit portion mounted on the lower opening surface and provided with a magnetic gap into which the voice coil is fitted, wherein the exposed portion is a top surface of the casing and a short Located at the corner portion of the side, the lead wire of the voice coil is directly soldered to the internal connection portion at the exposed portion, and the upper surface of the exposed portion is covered with the solder, and the lead wire is The boy Together is extended in the direction opposite corners approximately the exposed side corner portion from said corner portion on the same side as the exposed portion side corner portion side in the short side of the corner portion of the coil body, the exposed A speaker bent in the direction of the part. 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. The speaker according to claim 1, wherein the magnetic circuit portion has a corner portion of the magnetic gap opened at least outward.

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