JP4305228B2 - Slim speaker and module, electronic device and apparatus using the same - Google Patents

Description

The present invention relates to slim speakers and modules used in various audio equipment and information communication equipment, and electronic equipment and devices such as mobile phones and game machines.

  A conventional technique will be described with reference to FIG.

  FIG. 6 is a cross-sectional view of a conventional slim speaker, and FIG. 7 is a perspective view of the diaphragm. As shown in FIGS. 6 and 7, the magnetized magnet 1 is sandwiched between the upper plate 2 and the yoke 3 to constitute an inner magnet type magnetic circuit 4. A frame 6 is coupled to the yoke 3 of the magnetic circuit 4.

  A diaphragm 7 made of a resin film is coupled to the peripheral portion of the frame 6, a voice coil 8 is coupled to the diaphragm 7, and the voice coil 8 is fitted into the magnetic gap 5 of the magnetic circuit 4. Are connected.

  Here, the diaphragm 7 is formed of a single plate so as to cover the inner peripheral side 7 a and the outer peripheral side 7 b of the voice coil 8, and the connecting portion with the voice coil 8 depends on the shape of the voice coil 8. A projection 7c is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the coupling side with the voice coil 8, and a part of the voice coil 8 is inserted into the ring-shaped groove over the entire circumference. Combining and configuring.

  An inclined surface is also formed on the outer peripheral portion 7b of the projection 7c to function as a diaphragm, and a suspension 7d is formed in a cross-section roll shape on the outer periphery so that the diaphragm 7 can freely vibrate.

  With this configuration, not only the inner peripheral portion 7a of the voice coil 8 but also the outer peripheral portion 7b can function as a diaphragm, so that the effective vibration area of the diaphragm 7 can be increased, and the sound pressure level is increased. Can be improved.

For example, Patent Document 1 and Patent Document 2 are known as prior art document information relating to the invention of this application.
JP-A-62-53600 Special table 2003-521185 gazette

In the above-described slim speaker, not only the inner peripheral portion 7a of the voice coil 8 but also the outer peripheral portion 7b function as a diaphragm, so that the sound pressure level can be improved. And in order to improve the coupling | bonding strength of the diaphragm 7 and the voice coil 8, the projection part 7c is provided and the adhesive bond is carried out.

However, the shape and rigidity of the inner peripheral portion 7a and the outer peripheral portion 7b of the protruding portion 7c into which a part of the voice coil 8 is inserted are reduced, so that the diaphragm 7 is accurate against the vertical vibration of the voice coil 8. It has a problem of not following. Therefore, there has been a problem that performance degradation occurs such as causing a peak or a dip on the sound pressure frequency characteristic of the slim speaker or lowering a high frequency limit frequency.

Purpose of the present invention is to solve the problems described above, while improving the sound pressure level of the slim speaker provides excellent slim speaker can be enlarged stabilization and high-band threshold frequency of the sound pressure frequency characteristic It is what.

  In order to achieve the above object, the present invention has the following configuration.

According to a first aspect of the present invention, there is provided a frame coupled to a magnetic circuit, a diaphragm composed of any one of a square shape, an elliptical shape, and a track shape coupled to an outer peripheral portion of the frame, and the vibration A slim speaker is constituted by a voice coil composed of any one of a rectangular shape, an elliptical shape, and a track shape that is coupled to a plate and a part of which is disposed in the magnetic gap of the magnetic circuit. And the said diaphragm is comprised with one board | plate material so that the inner peripheral part side and outer peripheral part side of the said voice coil may be covered, and the coupling | bond part with a voice coil is a coupling | bonding of a voice coil according to the shape of a voice coil. A protrusion is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the side, and a part of the voice coil is inserted into and combined with this ring-shaped groove over the outer periphery of the protrusion. In addition, a slope is formed to function as a diaphragm, and a suspension part is formed on the outer periphery of the diaphragm so that the diaphragm can freely vibrate. The protrusion and the diaphragm are formed by reinforcing ribs formed at right angles to the protrusion. Reinforced configuration.

With this configuration, the shape rigidity of the joint of the diaphragm with the voice coil is increased, and vibration transmission from the voice coil to the diaphragm can be realized accurately, eliminating peaks and dips in the sound pressure frequency characteristics. it can. Therefore, while ensuring the improvement of the sound pressure level of the slim speaker can be the stabilization of the sound pressure frequency characteristics of the slim speaker to extend the high frequency limit frequency.

Furthermore, by forming a suspension portion on the outer peripheral portion of the diaphragm, vertical vibration of the diaphragm can be performed more smoothly, and the FO of the speaker can be reduced and the bandwidth can be increased.

According to a second aspect of the present invention, the reinforcing ribs are formed on both the inner side and the outer side of the protruding portion to which the voice coil of the diaphragm is coupled. With this configuration, the shape rigidity of the coupling portion between the diaphragm and the voice coil is further increased, and a more stable sound pressure frequency characteristic of the slim speaker can be realized.

According to a third aspect of the present invention, the diaphragm is made of a resin material. With this configuration, the shape of the diaphragm can be easily formed.

According to a fourth aspect of the present invention, the diaphragm is made of a sheet material. With this configuration, it is possible to reduce the weight of the diaphragm.

According to a fifth aspect of the present invention, the voice coil is configured by providing a bobbin. With this configuration, the central portion of the winding of the voice coil can be disposed at a position where the magnetic flux density of the magnetic gap is high, and the sound pressure level of the slim speaker can be improved.

According to a sixth aspect of the present invention, a module is configured by combining any one slim speaker according to the first to fifth aspects and an electronic circuit. With this configuration, a module in which a slim speaker and an electronic circuit are combined can be provided at a low cost.

According to a seventh aspect of the present invention, an electronic apparatus is configured by mounting any one slim speaker according to the first to fifth aspects. With this configuration, it is possible to stabilize the frequency characteristics of the electronic device.

According to an eighth aspect of the present invention, the apparatus is configured by mounting any one slim speaker according to the first to fifth aspects. With this configuration, the frequency characteristics of the device can be stabilized.

As described above, the present invention provides a diaphragm constituted by one of a rectangular plate , an elliptical shape, and a track type constituted by a single plate member, and a voice coil constituted by any one of a rectangular shape, an elliptical shape, and a track type . Depending on the shape, a protrusion is formed on the opposite side of the coupling side to form a ring-shaped groove on the voice coil coupling side, and a part of the voice coil is inserted into the ring-shaped groove over the entire circumference. Connected to form an inclined surface on the outer periphery of the protrusion so that it functions as a diaphragm. Further, a suspension is formed on the outer periphery of the protrusion so that the diaphragm can freely vibrate. A slim speaker is constructed by reinforcing with reinforcing ribs formed in a direction perpendicular to.

With this configuration, the shape rigidity of the joint of the diaphragm with the voice coil is increased, and vibration transmission from the voice coil to the diaphragm can be realized accurately, eliminating peaks and dips in the sound pressure frequency characteristics. it can. Therefore, while ensuring the improvement of the sound pressure level of the slim speaker can be the stabilization of the sound pressure frequency characteristics of the slim speaker to extend the high frequency limit frequency.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, the first to fifth aspects of the present invention will be described with reference to the first embodiment. FIG. 1 is a cross-sectional view of a slim type speaker according to an embodiment of the present invention, and FIG. 2 is a perspective view of the diaphragm.

  As shown in FIGS. 1 and 2, a magnetized magnet 21 is sandwiched between an upper plate 22 and a yoke 23 to form an internal magnet type magnetic circuit 24. A frame 26 is coupled to the yoke 23 of the magnetic circuit 24. The outer periphery of the diaphragm 27 is bonded to the peripheral edge of the frame 26, and one end of the voice coil 28 is coupled to the diaphragm 27, and the opposite end of the voice coil 28 is fitted into the magnetic gap 25 of the magnetic circuit 24. It is configured to be connected to.

  Here, the diaphragm 27 is formed of a single plate so as to cover the inner peripheral portion 27 a and the outer peripheral portion 27 b of the voice coil 28, and the connecting portion with the voice coil 28 is in accordance with the shape of the voice coil 28. A protrusion 27c is formed on the side opposite to the coupling side so as to form a ring-shaped groove on the coupling side with the voice coil 28, and a part of the voice coil 28 is inserted into the ring-shaped groove all around the coupling. Configured.

  An inclined surface is also formed on the outer peripheral portion 27b of the projecting portion 27c to function as a diaphragm, and a suspension 27d is formed in a roll shape in cross section so that the diaphragm 27 can freely vibrate on the outer periphery. .

  Here, a reinforcing rib 27e is formed on the inner peripheral portion 27a of the protruding portion 27c, and a reinforcing rib 27f is formed on the outer peripheral portion 27b of the protruding portion 27c in a direction orthogonal to the protruding portion 27, respectively. 27 and the slopes on the inner and outer peripheries are combined to improve the shape rigidity.

  As the shape of the reinforcing ribs 27e and 27f, as shown in FIGS. 1 and 2, a substantially triangular pyramid shape that connects the protrusion 27c and the inner peripheral portion 27a and the outer peripheral portion 27b of the diaphragm 27, or a material thickness May be formed in a constant shape.

And about these reinforcement ribs, it is desirable to aim at weight reduction as a hollow shape from a viewpoint of the sound pressure level improvement of a slim speaker.

  With this configuration, not only the inner peripheral portion 27a of the voice coil 28 but also the outer peripheral portion 27b function as a diaphragm, and the shape rigidity is improved by the reinforcing ribs 27e and 27f. While expanding the vibration area and improving the sound pressure level, it is possible to stabilize the frequency characteristics and extend the high-frequency limit frequency.

  Further, as shown in claim 2, the reinforcing ribs are formed on both the inner side and the outer side of the projecting portion 27c of the diaphragm 27. However, the reinforcing ribs may be formed on either one of them. It is possible to set freely according to desired characteristics, such as forming more or less.

Further, the outer peripheral portion of the vibration plate to form a suspension 27d, to implement the vertical vibration of the diaphragm more smoothly, thereby achieving a low FO reduction and band expansion slim loudspeaker.

  Further, as described in claims 4 and 5, the material of the diaphragm is made of a sheet-like resin material, whereby the diaphragm 27 is reduced in weight and its shape is easily obtained.

  Further, as described in claim 6, the voice coil 28 is provided with a bobbin so that the central portion of the winding of the voice coil 28 is arranged at a position where the magnetic flux density of the magnetic gap 25 is high so that the sound pressure level is high. Have gained.

  In the above-described embodiment, the shape of the voice coil 28 is a square shape to make the speaker slim, and the diaphragm 27 is also a square shape for further slimming.

The shape of the voice coil 28 and the diaphragm 27 may be not only a square shape but also an elliptical shape or a track shape.

(Embodiment 2)
Hereinafter, with reference to the second embodiment will be described the invention described in particular claim 6 of the present invention.

FIG. 3 is a cross-sectional view of the speaker module according to the embodiment of the present invention. As shown in FIG. 3, the slim speaker 30 according to any one of claims 1 to 5 and the electronic circuit 40 are integrated to form a speaker module 50.

  Here, as a configuration of the speaker module 50, the electronic component 42 is fixed and wired on the circuit board 41 to configure the electronic circuit 40. The electronic circuit 40 and the speaker 30 according to any one of claims 1 to 8 are integrally coupled to form a speaker module 50.

The electronic circuit 40 includes at least an amplifying circuit for an audio signal supplied to the slim speaker. That is, a circuit for amplifying a signal-processed audio signal to a level necessary for outputting from the speaker is already integrated with the speaker and also has an internal wiring, so this speaker module is coupled. Sound output can be easily obtained with just this.

  In addition to the amplifier circuit, the electronic circuit 40 is a circuit required for communication such as a detection circuit, a modulation circuit, and a demodulation circuit, or a display means such as a liquid crystal if it is a communication device such as a mobile phone. In addition, various circuits such as a power supply circuit and a charging circuit can be included.

  By adopting this configuration, the speaker and the electronic circuit, which were conventionally produced separately and supplied to the production base of electronic devices such as mobile phones through the respective inspection processes and logistics processes, are integrated into a module. As a result, the production process, the inspection process, and the distribution process can be integrated, and a great cost reduction can be achieved.

Therefore, the speaker module 50 in which the slim speaker 30 and the electronic circuit 40 are combined can be provided at a low cost.

(Embodiment 3)
The third aspect of the present invention will be described below with reference to the seventh embodiment.

FIG. 4 is a cross-sectional view of a main part of a mobile phone which is an electronic apparatus according to an embodiment of the present invention. As shown in FIG. 4, a cellular phone 80 is configured by mounting any one slim speaker 30 according to claims 1 to 5 .

Here, as a configuration of the mobile phone 80, components such as a slim speaker 30, an electronic circuit 40, a display module 60 such as a liquid crystal, a module, and the like are mounted inside an exterior case 70, and a main part of the mobile phone 80 is arranged. It is composed.

  With this configuration, it is possible to stabilize the sound pressure frequency characteristics of an electronic device such as a mobile phone and to extend the high frequency limit frequency.

(Embodiment 4)
Hereinafter, with reference to the fourth embodiment will be described the invention described in particular claim 8 of the present invention.

FIG. 5 shows a cross-sectional view of an automobile 90 which is an apparatus according to an embodiment of the present invention. As shown in FIG. 5, an automobile 90 is configured by incorporating the slim speaker 30 of the present invention into a rear tray or a front panel and using it as a part of car navigation or car audio.

By adopting this configuration, it is possible to stabilize the sound pressure frequency characteristics of an apparatus such as an automobile equipped with the slim speaker 30 and to extend the high-frequency limit frequency.

A slim speaker, a speaker module, an electronic device and an apparatus according to the present invention are an electronic device such as an audiovisual device, an information communication device, a game device, etc., which requires stabilization of sound pressure frequency characteristics and expansion of a high frequency limit frequency, Applicable to devices such as automobiles.

Sectional drawing of the slim speaker in one embodiment of this invention The perspective view of the diaphragm in one embodiment of the present invention Sectional drawing of the speaker module in one embodiment of this invention Sectional drawing of the principal part of the electronic device in one embodiment of this invention Sectional drawing of the apparatus in one embodiment of this invention Cross-sectional view of a conventional slim speaker A perspective view of a conventional diaphragm

21 magnet 22 upper plate 23 yoke 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm 27a diaphragm inner periphery 27b diaphragm outer periphery 27c diaphragm projection 27d diaphragm suspension 27e reinforcement rib 27f reinforcement rib 28 voice coil 30 slim Speaker 40 Electronic circuit 41 Circuit board 42 Electronic component 50 Speaker module 60 Display module 70 Exterior case 80 Mobile phone 90 Automobile

Claims (8)

A frame coupled to the magnetic circuit, a diaphragm composed of any one of a square shape, an elliptical shape, and a track shape coupled to the outer periphery of the frame, and a portion of the diaphragm coupled to the diaphragm A slim speaker comprising a voice coil composed of any one of a square shape, an elliptical shape, and a track shape disposed in a magnetic gap of a magnetic circuit, wherein the diaphragm includes an inner peripheral portion side and an outer peripheral portion of the voice coil. The connecting portion with the voice coil is configured to form a ring-shaped groove on the connecting side with the voice coil in accordance with the shape of the voice coil. Protruding part is formed on the opposite side, a part of the voice coil is inserted and joined to this ring-shaped groove part over the entire circumference , and an inclined surface is also formed on the outer peripheral part of the projecting part to function as a diaphragm, Furthermore Outer peripheral diaphragm forms a suspension member so as to freely vibrate in the projecting portion and the diaphragm slim loudspeaker comprising reinforced by the reinforcing ribs formed in the direction perpendicular to the protrusion. The slim speaker according to claim 1, wherein the reinforcing ribs are formed on both the inside and the outside of the protruding portion joined to the voice coil of the diaphragm. The slim speaker according to claim 1 and 2, wherein the diaphragm is made of a resin material. The slim speaker according to any one of claims 1 to 3, wherein the diaphragm is made of a sheet material. The slim speaker according to any one of claims 1 to 4, wherein the voice coil is provided with a bobbin. Any one slim speaker and module that combines an electronic circuit according to claim 5, wherein the claim 1. The electronic device carrying the slim speaker of any one of Claims 1-5 . Equipped with apparatus of any one slim speaker according to claim 5, wherein the claim 1.

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