JP2006101368A - Loudspeaker and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loudspeaker capable of attaining a high withstanding input, by solving the difficulty in the high withstanding input, because a voice coil is coupled onto one side of a diaphragm, and to provide a manufacturing method thereof. <P>SOLUTION: In the loudspeaker, comprising a frame 1 coupled with a magnetic circuit with a magnetic gap 1b, a voice coil 3 arranged contactlessly and close to the upper part of the magnetic gap 1b, and a diaphragm 4 coupled with the voice coil 3, the voice coil 3 is configured, such that the voice coil is wound on the front side of a base member 3a from its outer circumference to its inner circumference through copper plating, the end of the voice coil 2 is wound on the rear side from its inner circumference to its outer circumference nearly in the same shape, and in the same direction as the front side while penetrating the base member 3a; the voice coil is formed as an integral structure consecutive to the front and rear sides via the base member 3a; and the voice coil 3 with a high density and a low profile attains high withstanding input. <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. 7 is a cross-sectional view showing the configuration of a conventional slim speaker of this type, and FIG. 8 is a plan view showing a voice coil used in the speaker, which the applicant has proposed as a slim speaker. Is.

  7 and 8, reference numeral 10 denotes a first magnet, and 11 denotes a first yoke coupled around the first magnet 10, thereby providing a first magnetic circuit having a first magnetic gap 10a. 12 is configured. Reference numeral 13 denotes a first frame coupled around the first yoke 11, and 13 a denotes air holes provided in the first frame 13. Reference numeral 14 denotes a diaphragm, and reference numeral 14 a denotes an edge provided on the diaphragm 14, and the periphery of the diaphragm 14 is coupled to the periphery of the first frame 13. A voice coil 15 is coupled to the diaphragm 14, and the voice coil 15 is wound in a shape corresponding to the first magnetic gap 10a for a plurality of turns. Reference numeral 15a denotes a start end (or a rear end not shown) of the voice coil 15, which is soldered to a terminal (not shown) coupled to the first (or second) frame 13 via a lead wire (not shown). It is comprised so that it may connect by doing.

  Reference numeral 16 denotes a second magnetic circuit disposed symmetrically with the first magnetic circuit 12 so as to sandwich the diaphragm 14. Similarly to the first magnetic circuit 12, the second magnetic circuit 16 is arranged at the center of the second yoke 17. A second magnetic gap 18 a is provided by coupling the magnet 18, and the second magnetic circuit 16 is coupled to the center of the second frame 19. Reference numeral 19 a denotes an air hole provided in the second frame 19.

  In the conventional speaker configured in this manner, the first magnet 10 and the second magnet 18 are magnetized in the thickness direction and in the direction in which each repels, and the first magnetic gap 10a and the second magnet 18 are magnetized. By disposing the voice coil 15 at a position where the leakage magnetic field generated from each gap 18a can be utilized to the maximum, the voice coil 15 is swung up and down by inputting a voice signal to the voice coil 15, thereby causing the voice coil 15 to move. The combined diaphragm 14 was 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, since the voice coil 15 is coupled on one surface of the diaphragm 14, the amplitude clearance of the vibration system largely depends on the height of the voice coil so as to increase the input resistance. However, when the wire diameter of the voice coil is increased, the overall height becomes higher and the amplitude clearance decreases, which makes it difficult to achieve high input resistance.

  An object of the present invention is to solve such a conventional problem and to provide a loudspeaker capable of achieving high input resistance and a manufacturing method thereof.

  In order to solve the above-described problems, the present invention combines a frame including 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. In the speaker comprising a diaphragm whose outer peripheral part is coupled to the frame, the voice coil is formed by winding a plurality of turns from the outer periphery toward the inner periphery by copper plating on the surface of the resin film, and the voice coil The end of the resin film is continuously wound on the front and back surfaces through the resin film by being wound in the same direction as the surface side from the inner periphery to the outer periphery on the back surface of the resin film through the resin film. It is made into the structure formed in the integral structure.

  As described above, the speaker according to the present invention can realize a high-density and thin voice coil by forming the voice coil by copper plating and by forming the voice coil in an integrated structure continuous with the front and back surfaces through the resin film. It is possible to obtain a great effect that the amplitude clearance of the vibration system can be increased and the input resistance can be increased.

(Embodiment 1)
Hereinafter, the first and fifth aspects of the present invention will be described with reference to the first embodiment.

  1 is an exploded perspective view showing a configuration of a speaker according to Embodiment 1 of the present invention, FIG. 2 is a sectional view thereof, and FIGS. 3A and 3B show a configuration of a voice coil used in the speaker. It is the exploded perspective view and principal part sectional drawing.

  In FIG. 1 to FIG. 3, reference numeral 1 denotes a rectangular first frame made of a metal magnetic material, and reference numeral 1 a denotes a rectangular recess provided in a substantially central portion of the first frame 1. Reference numeral 2 denotes a rectangular first magnet, which is fitted into and coupled to a recess 1a provided in the first frame 1 so that the outer peripheral surface of the first magnet 2 and the wall surface of the recess 1a are connected. A first magnetic gap 1b is formed with a rectangular uniform gap therebetween.

  Reference numeral 3 denotes a voice coil. The voice coil 3 is formed by winding a coil 3b having a plurality of turns in a rectangular shape from the outer periphery to the inner periphery by copper plating on the surface of a polyimide substrate 3a. The end of 3b penetrates the base material 3a and is wound around the back surface of the base material 3a from the inner periphery to the outer periphery in the same direction as the front surface side, so that the base material 3a is interposed. The voice coil 3 configured in this manner is formed in a continuous and continuous structure on the front and back surfaces, and is formed in substantially the same shape as the magnetic gap 1 b provided in the first frame 1. is there. Further, the start and end of the voice coil 3 are respectively disposed at both ends in the longitudinal direction of the voice coil 3, and lead wire lead portions 3c are formed at the start and end, respectively.

  Reference numeral 4 denotes a track-type diaphragm made of a resin. A flat plate-like main body portion 4a at the center, an edge portion 4b at the peripheral edge of the main body portion 4a, and a flat plate-like attaching portion 4c at the peripheral edge of the edge portion 4b Is formed in an integral structure, and the voice coil 3 is coupled to the main body portion 4a.

  Reference numeral 5 denotes a rectangular second frame made of a metal magnetic material, and reference numeral 5 a denotes a rectangular concave portion provided at a substantially central portion of the second frame 5. Reference numeral 6 denotes a rectangular second magnet, which is fitted into and coupled to a recess 5a provided in the second frame 5 to thereby connect the outer peripheral surface of the second magnet 6 and the wall surface of the recess 5a. A second magnetic gap 5b is formed with a rectangular uniform gap therebetween.

  Further, the second frame 5 and the second magnet 6 are disposed so as to face each other with the diaphragm 4 interposed therebetween, so that the affixing portion 4 c on the periphery of the diaphragm 4 is attached to the first frame 1. The voice coil 3 coupled to the diaphragm 4 is disposed at a substantially intermediate position between the first magnetic gap 1b and the second magnetic gap 5b. It is comprised as follows.

  The speaker according to the present embodiment configured as described above has a configuration in which the coil 3b of the voice coil 3 is formed by copper plating and is formed in an integrated structure continuous on the front and back surfaces through the base material 3a made of a resin film. Since the high-density and thin voice coil 3 can be realized, it is possible to obtain a special effect that it is possible to achieve high input resistance.

(Embodiment 2)
The second aspect of the present invention will be described below with reference to the second embodiment.

  In the present embodiment, the configuration of the voice coil of the speaker according to the first embodiment is partially different, and other configurations are the same as those of the first embodiment, and therefore the same parts are the same. Detailed description thereof will be omitted, and only different parts will be described below with reference to the drawings.

  FIG. 4 is a plan view showing a configuration of a voice coil used in the speaker according to Embodiment 2 of the present invention. In FIG. 4, 7 is a voice coil, and this voice coil 7 is made of a polyimide base material 7a. A coil 7b having a plurality of turns is formed in a rectangular shape from the outer periphery to the inner periphery by copper plating on the surface, and the end of the coil 7b penetrates the base material 7a and is formed on the back surface of the base material 7a. It is according to the first embodiment that it is formed in a monolithic structure that is continuous to the front and back surfaces via the base material 7a by being wound in a substantially the same shape in the same direction as the surface side from the outer periphery to the outer periphery. The same as the voice coil 3.

  Further, the start and end of the coil 7b are respectively disposed in one end in the longitudinal direction of the voice coil 7 in the same direction, and lead wire lead portions 7c wider than the coil 7b are connected to the start and end, respectively. It is a configuration.

  The speaker according to the present embodiment configured as described above has a configuration in which the start and end of the coil 7b are drawn from the same direction, and a lead wire lead portion 7c wider than the coil 7b is connected to each start and end. In addition to the effects obtained by the speaker of the first embodiment, when this speaker is incorporated into a set and electrical connection is made, the wiring can be performed at the same place, so the work is simplified. In addition to this, a special effect that the wiring routing can be shortened can be obtained.

(Embodiment 3)
The third embodiment of the present invention will be described below in particular.

  In this embodiment, the configuration of the voice coil of the speaker according to the first embodiment is partially different, and the other configuration is the same as that of the first embodiment, and therefore the same parts are the same. Reference numerals are assigned and detailed description thereof is omitted, and only different portions will be described below with reference to the drawings.

  FIG. 5 is a plan view showing the configuration of a voice coil used in the speaker according to Embodiment 3 of the present invention. In FIG. 5, 8 is a voice coil, and this voice coil 8 is made of a polyimide base material 8a. A coil 8b having a plurality of turns is formed in a rectangular shape by copper plating on the surface from the outer periphery toward the inner periphery, and the end of the coil 8b penetrates the base material 8a and is formed on the back surface of the base material 8a. It is according to the first embodiment that it is formed in a monolithic structure that is continuous to the front and back surfaces via the base material 8a by being wound in substantially the same shape in the same direction as the front surface side from the outer periphery to the outer periphery. The same as the voice coil 3.

  Further, the start and end of the coil 8b are respectively disposed in one end in the longitudinal direction of the voice coil 8 in the same direction, and lead wire lead portions 8c wider than the coil 8b are connected to the start and end, respectively. Yes. Further, a lead wire lead portion 8d as a dummy having the same shape as the lead wire lead portion 8c is provided at the other end in the longitudinal direction in a state of being not connected to the coil 8b.

  The speaker according to the present embodiment configured as described above draws the start and end of the coil 8b from the same direction, and connects and forms a lead wire lead portion 8c wider than the coil 8b to each start and end. In addition to the effects obtained by the speaker of the first embodiment, the speaker is set by the configuration in which the lead wire lead portion 8d as a dummy is provided in a position symmetric to the lead wire lead portion 8c and is not connected to the coil 8b. When installing and making electrical connections, the wiring can be done in the same place, which simplifies the work and shortens the wiring routing, and also enables voice Since the wiring pattern constituting the coil 8 has a substantially symmetrical shape in the longitudinal direction, the diaphragm 4 coupled with the voice coil 8 has an amplitude. The one in which special effects can be obtained that it is possible to suppress the occurrence of distortion due to imbalance, such as weight and hardness.

(Embodiment 4)
The fourth embodiment of the present invention will be described below with reference to the fourth embodiment.

  In this embodiment, the configuration of the voice coil of the speaker according to the first embodiment is partially different, and the other configuration is the same as that of the first embodiment, and therefore the same parts are the same. Reference numerals are assigned and detailed description thereof is omitted, and only different portions will be described below with reference to the drawings.

  FIG. 6 is a plan view showing a configuration of a voice coil used in the speaker according to Embodiment 4 of the present invention. In FIG. 6, 9 is a voice coil, and this voice coil 9 is made of a polyimide base material 9a. A coil 9b having a plurality of turns is formed in a rectangular shape from the outer periphery to the inner periphery by copper plating on the surface, and the end of the coil 9b penetrates the base material 9a and is formed on the back surface of the base material 9a. It is according to the first embodiment that it is formed in a monolithic structure continuous to the front and back surfaces via the base material 9a by being wound and formed in substantially the same shape in the same direction as the surface side from the outer periphery to the outer periphery. The same as the voice coil 3.

  Further, the beginning and end of the coil 9b are respectively arranged in the same direction at one end in the longitudinal direction of the voice coil 9, and the lead wire leading portion 9c wider than the coil 9b is connected to the start and end, respectively. Further, a terminal portion 9d for external connection is integrally provided at the tip of the lead wire lead-out portion 9c.

  The speaker according to the present embodiment configured as described above draws the start and end of the coil 9b from the same direction, and connects and forms a lead wire lead portion 9c wider than the coil 9b to each start and end. In addition to the effect obtained by the speaker of the first embodiment, the configuration in which the terminal portion 9d for external connection is integrally provided at the tip of the lead wire lead portion 9c, in addition to the effect obtained by the speaker of the first embodiment, When connecting, it is possible to perform wiring in the same place without using a connection member, etc., so that the work is simplified and the routing of the wiring can be shortened. Is obtained.

  The speaker and the manufacturing method thereof according to the present invention have a special effect that it is possible to achieve a high input resistance since a high-density and thin voice coil can be realized. It is useful as a speaker used for the above.

The disassembled perspective view which showed the structure of the speaker by Embodiment 1 of this invention. Cross section (A) An exploded perspective view showing a configuration of a voice coil used for the speaker, (b) a cross-sectional view of the main part. The top view which showed the structure of the voice coil used for the speaker by Embodiment 2 of this invention The top view which showed the structure of the voice coil used for the speaker by Embodiment 3 of this invention. The top view which showed the structure of the voice coil used for the speaker by Embodiment 4 of this invention. Sectional view showing the structure of a conventional speaker Plan view showing voice coil used for the speaker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st frame 1a, 5a Concave 1b 1st magnetic gap 2 1st magnet 3, 7, 8, 9 Voice coil 3a, 7a, 8a, 9a Base material 3b, 7b, 8b, 9b Coil 3c, 7c, 8c, 9c Lead wire lead-out part 4 Diaphragm 4a Main body part 4b Edge part 4c Adhering part 5 Second frame 5b Second magnetic gap 6 Second magnet 9d Terminal part

Claims (6)

A frame including a magnetic circuit having a magnetic gap, a voice coil disposed in close proximity to the magnetic gap above the magnetic gap, and a vibration in which the outer periphery is coupled to the frame. In the speaker made of a plate, the voice coil is formed by winding a plurality of turns from the outer periphery to the inner periphery by copper plating on the surface of the resin film, and the end of the voice coil penetrates the resin film. The speaker is formed in an integrated structure that is continuous with the front and back surfaces through a resin film by being wound around the back surface in the same direction as the front surface side from the inner periphery to the outer periphery. 2. The speaker according to claim 1, wherein the start and end of the voice coil are drawn out from the same direction, and a lead wire lead portion wider than the voice coil is connected to the start and end of the voice coil. The speaker according to claim 1, wherein a lead wire lead-out portion having the same shape is formed on the side opposite to the lead wire lead-out portion provided at the start and end of the voice coil so as not to be connected to the voice coil. The speaker according to claim 1, wherein a terminal portion for external connection is integrally provided at a distal end portion of a lead wire lead portion connected and formed at the start and end of the voice coil. The speaker according to claim 1, wherein a frame including a magnetic circuit having a magnetic gap is disposed symmetrically and opposed via a diaphragm. A through-hole is provided at a predetermined position of the polyimide film that is the base material of the diaphragm, and then a copper base layer is formed on the front and back surfaces of the polyimide film by vapor deposition plating. After forming a voice coil of a predetermined pattern on the copper underlayer by copper plating into an integrated structure continuous with the front and back surfaces through the through hole, etching the copper underlayer excluding the desired pattern of the voice coil Removing the copper underlayer other than the voice coil to produce a voice coil, coupling the voice coil to the diaphragm, and coupling the diaphragm to which the voice coil is coupled to a frame having a magnetic circuit A method for manufacturing a speaker.

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