JP2017050842A - Vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration generator having a simple structure.SOLUTION: A vibration generator (10a) comprises: a first diaphragm (11); a spherical magnet (13) attached to the first diaphragm (11); and a coil (15) provided so as to face the magnet (13) at a distance. The vibration generator (10a) further comprises a second diaphragm (12) arranged at a distance from the first diaphragm (11). Preferably, the coil (15) is attached to the second diaphragm (12).SELECTED DRAWING: Figure 1

Description

  The present invention relates to an exciter, for example, an exciter such as a speaker used in an audio device or the like.

  Generally, an exciter such as a speaker used in audio equipment is an internal magnetic circuit in which a magnet is arranged inside a voice coil, or an external magnetic type magnet in which a magnet is arranged outside a voice coil. It has a circuit.

  As a speaker having an internal magnet type magnetic circuit, for example, JP-A-7-203589 (Patent Document 1) can be cited. As a speaker having an external magnet type magnetic circuit, for example, JP-A-9-233594 (Patent Document 2), JP-A-2005-277561 (Patent Document 3), International Publication No. 2011/007441 (Patent Document 4). Etc.

  Patent Documents 1 to 4 disclose that vibration is transmitted to a diaphragm to which a voice coil is attached, and sound is output from the diaphragm.

JP-A-7-203589 JP-A-9-233594 JP 2005-277561 A International Publication No. 2011/007441

  This inventor made it the subject to implement | achieve the vibrator of a simple structure while differing from the speaker of the said patent documents 1-4. That is, an object of the present invention is to provide a vibrator having a simple structure.

  The vibration exciter of the present invention includes a first diaphragm, a magnet attached to the first diaphragm, and a coil provided to face the magnet with a gap.

  According to the vibrator of the present invention, when a current is passed through the coil, vibration is transmitted to the first diaphragm to which the magnet is attached by this current and the magnetic flux of the magnet. Can be output. For this reason, unlike the said patent documents 1-4, the vibrator of this invention can output an audio | voice from the 1st diaphragm with which the magnet was attached, and has implement | achieved the simple structure.

Ma Gunetto Te vibrator odor of the present invention is spherical. As a result, the magnet and the first diaphragm are in point contact. For this reason, since the contact area of a magnet and a 1st diaphragm can be reduced, it can suppress that a magnet prevents the vibration of a 1st diaphragm.

  Preferably, the vibrator according to the present invention further includes a yoke material disposed on a surface of the first diaphragm opposite to the surface on which the magnet is attached, and the magnet and the yoke material are held by a magnetic attraction force. .

  Thereby, since the magnet and yoke material provided via the 1st diaphragm are hold | maintained by the magnetic attraction force, a magnet and a yoke material can be arrange | positioned without using an adhesive agent etc. Further, the position of the magnet and the yoke material can be easily changed. For this reason, a simpler structure can be realized. Further, the magnetic force can be effectively utilized by the yoke material.

  The vibrator according to the present invention preferably further includes a second diaphragm disposed at a distance from the first diaphragm, and the coil is attached to the second diaphragm.

  As a result, when a current is passed through the coil, vibration is transmitted to the second diaphragm to which the coil is attached by this current and the magnetic flux of the magnet. For this reason, since both the 1st and 2nd diaphragm can be vibrated, an audio | voice can be output from both the 1st and 2nd diaphragm.

  The vibrator according to the present invention preferably includes a bottomed portion and flange portions erected from both ends of the bottomed portion, and further includes a cup-shaped yoke material formed of a yoke, and is provided inside the cup-shaped yoke material. The coil is arranged, and the outer bottom surface of the bottomed portion of the cup-shaped yoke material is bonded to the second diaphragm.

  Thereby, since the cup-shaped yoke material includes the coil, the leakage magnetic flux can be reduced, so that the magnetic force can be effectively used.

  The vibrator according to the present invention preferably further includes an elastic member provided between the tip of the flange portion of the cup-shaped yoke member and the first diaphragm.

  Since the elastic member can absorb the resistance caused by the vibrations of the first and second diaphragms, the sound output can be improved.

  The present invention can provide a vibrator having a simple structure.

It is sectional drawing which shows schematically the vibrator in Embodiment 1 of this invention. Another vibrator that put to the first embodiment of the present invention is a cross-sectional view schematically showing. It is sectional drawing which shows schematically the vibrator in Embodiment 2 of this invention. It is sectional drawing which shows schematically the vibrator in Embodiment 3 of this invention. It is sectional drawing which shows schematically the vibrator in Embodiment 4 of this invention. It is sectional drawing which shows schematically the vibrator in Embodiment 5 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
Referring to FIGS. 1 and 2, will be described vibrator 10 a, 1 0c an embodiment of the present invention.

  As shown in FIG. 1, the vibrator 10 a of the present embodiment includes a first diaphragm 11, a second diaphragm 12, a magnet 13, a yoke material 14, a coil 15, and a cup-shaped yoke material 16. A bobbin 17 and an elastic member 18. A cup-shaped yoke material 16 is disposed on the second diaphragm 12. A bobbin 17 is disposed inside the cup-shaped yoke material 16. A coil 15 is wound around the outer periphery of the bobbin 17 inside the cup-shaped yoke material 16. A magnet 13 is disposed on the coil 15 with a gap therebetween. A first diaphragm 11 is arranged on the magnet 13. A yoke material 14 is disposed on the first diaphragm 11.

  In the vibrator 10a of the present embodiment, each of the first and second diaphragms 11 and 12 vibrates, and the first vibration unit including the first diaphragm 11 and the second vibration including the second diaphragm 12. Audio is output from each of the units.

  In detail, the 1st diaphragm 11 and the 2nd diaphragm 12 are arrange | positioned at intervals, and are parallelly arranged mutually parallel in this Embodiment. The first and second diaphragms 11 and 12 are plate-like members. The first diaphragm 11 and the second diaphragm 12 may have the same size or different sizes.

  The materials of the first and second diaphragms 11 and 12 are not particularly limited, but are preferably papers from the viewpoint of weight reduction, and have a front surface and a back surface from the viewpoint of good vibration characteristics. It is preferable that it is a material which has a space | gap between back surfaces. In the present embodiment, corrugated cardboard is used from the viewpoint of weight reduction and good vibration characteristics.

  A magnet 13 is attached to the first diaphragm 11. The magnet 13 is a permanent magnet. The material of the magnet 13 is not particularly limited, but it is preferable to use a Nd—Fe—B sintered magnet from the viewpoint of showing a high magnetic force. Since a small magnet 13 can be used by using the magnet 13 exhibiting a high magnetic force, the first diaphragm 11 to which the magnet 13 is attached can be easily vibrated.

The shape of the magnet 13 Ru sphere der As shown in FIG. When Ma Gunetto 13 is a sphere, which is preferable in point contact with the first diaphragm 11 and the magnet 13. Note that the spherical body, means that the outer shape is spherical bodies, including those inside is hollow.

The number of the magnet 13 is not particularly limited, it may be a single as shown in FIG. 1 may be a plurality as shown in FIG. In a plurality of cases, as shown in FIG. 2, they may be arranged in a direction intersecting with the extending direction (surface) of the first diaphragm 11, and arranged along the extending direction of the first diaphragm 11. It is good (not shown).

  A yoke material 14 is disposed on the surface of the first diaphragm 11 opposite to the surface on which the magnet 13 is attached. In other words, the magnet 13 is located on one side and the yoke material 14 is located on the other side via the first diaphragm 11. The magnet 13 and the yoke material 14 are held by a magnetic attraction force. That is, the magnet 13 and the yoke material 14 are held by the magnetic attraction force with the first diaphragm 11 interposed therebetween.

  The magnet 13 and the yoke material 14 may be bonded to the first diaphragm 11 with an adhesive, or may be held only by a magnetic attraction force. From the viewpoint that the position can be easily changed, it is preferable that the magnet 13 and the yoke material 14 are positioned only by the magnetic attractive force without using an adhesive.

  The yoke material 14 is formed of a yoke (a yoke). The yoke is soft iron that amplifies the attractive force of the magnet, and may contain iron, and includes a soft magnetic material.

The yoke material 14 may be plate-shaped as shown in FIGS . 1 and 2, and may be a sphere, a column (not shown), or the like. From the viewpoint of little influence on vibration characteristics, a thin plate shape is preferable. For example, the yoke material 14 is a plate-like member having a thickness of 0.5 mm or less.

  A coil 15 is provided so as to face the magnet 13 with a gap. The coil 15 is disposed in the path of the magnetic flux of the magnet 13.

  The coil 15 is attached to the second diaphragm 12. In this embodiment, the coil 15 is attached to the second diaphragm 12 via a cup-shaped yoke material 16 and a bobbin 17. The coil 15 is, for example, a solenoid coil.

  A bobbin 17 is provided for winding the coil 15. The bobbin 17 has a cup shape, and includes a bottomed portion 17a and flange portions 17b provided upright from both ends of the bottomed portion 17a. The bottomed portion 17a is a member for attaching to the second diaphragm 12, and has a plate shape. In the present embodiment, the outer bottom surface 17 a 1 of the bottomed portion 17 a is bonded to the cup-shaped yoke material 16. The flange portion 17b is a member around which the coil 15 is wound, and has a cylindrical shape.

  The bobbin 17 is made of a nonmagnetic material. The non-magnetic material is a material that is not a ferromagnetic material, and includes a paramagnetic material, a diamagnetic material, and an antiferromagnetic material. Examples of the non-magnetic material include metals such as aluminum and synthetic resins such as plastic.

  A cup-shaped yoke material 16 is provided so as to accommodate the coil 15 and the bobbin 17 therein. The cup-shaped yoke material 16 holds the coil 15 and the bobbin 17 so that the coil 15 and the bobbin 17 are located at the center. The cup-shaped yoke material 16 is formed of a material having a high magnetic permeability, that is, a yoke.

  The cup-shaped yoke material 16 is cup-shaped and includes a bottomed portion 16a and flange portions 16b erected from both ends of the bottomed portion 16a. The bottomed portion 16a is a member for attaching to the second diaphragm 12, and has a plate shape. The outer bottom surface 16a1 of the bottomed portion 16a of the present embodiment is bonded to the second diaphragm 12. The flange portion 16b is a member that surrounds the coil 15 and has a cylindrical shape. Note that the flange portion 16b may be two plate-like members that are spaced apart from each other. Since the outer surface of the flange portion 16b may be visually recognized, the outer surface is preferably painted.

The first diaphragm 11, the magnet 13, and the yoke material 14 constitute a first vibration unit. The second diaphragm 12, the coil 15, the bobbin 17, and the cup-shaped yoke material 16 constitute a second vibration unit.

  An elastic member 18 is provided so as to connect the first vibration unit and the second vibration unit. In the present embodiment, the elastic member 18 is provided between the tip of the flange portion 16 b of the cup-shaped yoke material 16 and the first diaphragm 11. The elastic member 18 is bonded to the flange portion 16 b and the first diaphragm 11. The elastic member 18 is a material having cushioning properties, such as sponge, rubber, resin, and the like.

Next, with reference to FIGS. 1 and 2, the operation of the vibrator 10a and 1 0c of the present embodiment.

Flux produced magnet 1 3 or colleagues, as indicated by an arrow B in FIG. 1, the coil 15 in the cup-shaped yoke member 16 passes through the placement space. When a current such as an audio signal current is supplied to the coil 15 in this state, a force is generated in the vertical direction in FIGS . 1 and 2 in accordance with Fleming's left-hand rule by this current and the magnetic force of the magnet 13. Thereby, the vibration is transmitted to the first diaphragm 11 and the second diaphragm 12. For this reason, the vibrations of the first diaphragm 11 and the second diaphragm 12 change in air pressure and are converted into sound, so that sound can be output from the first diaphragm 11 and the second diaphragm 12.

Conventionally, since the magnet is heavy, there is no technical idea of vibrating the diaphragm to which the magnet is attached, and the diaphragm attached to a relatively lightweight coil is vibrated (see Patent Documents 1 to 4 above). ). However, the present inventor conceived of using a small, high-magnetism magnet to vibrate the diaphragm to which the magnet is attached, unlike the above Patent Documents 1 to 4, and the magnet 13 is attached to the first. The vibrators 10a and 10c having a simple structure in which sound is output from the diaphragm 11 are realized.

In the vibrator of the present invention, the second diaphragm 12 may be omitted, but the vibrators 10a and 10c of the present embodiment also vibrate the second diaphragm 12 to which the coil 15 is attached. Since it is transmitted, a simple structure capable of outputting sound from both surfaces of the first and second diaphragms 11 and 12 is realized.

Further, by forming the first and second diaphragms 11 and 12 with paper such as corrugated cardboard, light and thin vibrators 10a and 10c can be realized.

The outer surface (In Fig. 1 and 2 of the first and second vibrating plates 11, 12 of the vibrator 10a and 1 0c of the present embodiment, the surface of the yoke member 14 side in the first diaphragm 11 , And the surface of the second diaphragm 12 opposite to the cup-shaped yoke member 16) may be decorated or a photo frame may be added. In this case, the vibrators 10a and 10c with improved interior properties can be realized.

  The yoke material 14 may be omitted. In this case, the magnet 13 is bonded to the first diaphragm 11 via an adhesive. However, by attaching the yoke material 14 to the first diaphragm 11, leakage magnetic flux can be reduced and the adhesive can be omitted, so that the output of sound from the first and second diaphragms 11 and 12 can be improved.

  Although the cup-shaped yoke material 16 may be omitted, since the leakage flux can be reduced by arranging the cup-shaped yoke material 16 so as to include the coil 15, the first and second diaphragms 11, 12 are arranged. Can improve the output of sound. Further, the bottomed portion 16 a may be omitted from the cup-shaped yoke material 16, but the cup-shaped yoke material 16 can be easily attached to the second diaphragm 12 by the bottomed portion 16 a.

Although the elastic member 18 may be omitted, the first and second diaphragms are arranged by disposing the elastic member 18 between the tip of the flange portion 16b of the cup-shaped yoke member 16 and the first diaphragm 11. In the vibrators 10a and 10c in which both 11 and 12 vibrate, the mutual vibration can be absorbed, so that the vibration characteristics can be improved.

  The bobbin 17 may be omitted, but the coil 15 can be easily held by arranging the bobbin 17. The bottomed portion 17a of the bobbin 17 may be omitted, but the bobbin 17 can be easily attached to the second diaphragm 12 by the bottomed portion 17a.

(Embodiment 2)
With reference to FIG. 3 , the vibrator 20 of Embodiment 2 is demonstrated. The vibrator 20 of the second embodiment basically has the same configuration as that of the vibrator 10a of the first embodiment shown in FIG. The difference is that the second yoke material 21 is arranged on the opposite side of the diaphragm 12 from the first diaphragm 11.

  The bottomed portion 17 a of the bobbin 17 is bonded to the surface of the second diaphragm 12 on the side facing the first diaphragm 11. A second yoke material 21 is bonded to the surface of the second diaphragm 12 opposite to the first diaphragm 11.

  The second yoke material 21 is formed of a yoke. The second yoke member 21 may be plate-shaped as shown in FIG. 4, or may be a sphere, a column (not shown), or the like. A magnetic closed circuit is formed between the yoke material 14 and the second yoke material 21.

A connecting member (not shown) that connects the first diaphragm 11 and the second diaphragm 12 is formed on the outer peripheral side of the coil 15. The connecting member may be in any form that can hold the first diaphragm 11 and the second diaphragm 12, and may cover the entire coil 15 or may not cover the entire coil 15. The connecting member includes, for example, a plate-like member extending in the vertical direction in FIG. 3 and an elastic member similar to the elastic member 18 in FIG. The plate-like member is made of a nonmagnetic material. The elastic member is provided at the tip of at least one of the tips of the plate-like member.

(Embodiment 3)
With reference to FIG. 4 , the vibrator 30 of Embodiment 3 is demonstrated. The vibrator 30 according to the third embodiment basically has the same configuration as that of the vibrator 10 a according to the first embodiment shown in FIG. 1, but a magnet 31 is disposed instead of the yoke material 14. Is different.

The shape and material of the magnet 31 may be the same as or different from those of the magnet 13. In FIG. 4 , the magnet 31 is a sphere, but may be a columnar shape, a plate shape, or the like, and is not particularly limited.

  The magnet 31 and the magnet 13 may be bonded to the first diaphragm 11 via an adhesive, but are preferably held by a magnetic attractive force.

(Embodiment 4)
With reference to FIG. 5 , the vibrator 40 of Embodiment 4 is demonstrated. The vibrator 40 of the fourth embodiment basically has the same configuration as that of the vibrator 10a of the first embodiment shown in FIG. 1, but is made of a material different from that of the first diaphragm 11. The first diaphragm 41 is different from the first diaphragm 41 in that the yoke member 14 is omitted.

  The first diaphragm 41 is formed of a yoke. For this reason, it is preferable that the 1st diaphragm 41 and the magnet 13 are hold | maintained by the magnetic attraction force. Further, a magnetic closed circuit is formed between the first diaphragm 41 and the cup-shaped yoke material 16.

(Embodiment 5)
With reference to FIG. 6 , the vibrator 50 of Embodiment 5 is demonstrated. The vibrator 50 of the fifth embodiment basically has the same configuration as that of the vibrator 10a of the first embodiment shown in FIG. 1, but the third diaphragm 51 sandwiching the vibrator 10a. And the fourth diaphragm 52 is further provided, and a connection member 53 that connects the end portions of the third diaphragm 51 and the fourth diaphragm 52 is further provided.

  The third diaphragm 51 is provided on the surface of the yoke member 14 opposite to the first diaphragm 11 and is bonded to the yoke member 14 in the present embodiment. The third diaphragm 51 is a plate-like member that is larger than the first diaphragm 11.

  The fourth diaphragm 52 is provided on the surface of the second diaphragm 12 opposite to the first diaphragm 11 and is bonded to the second diaphragm 12 in the present embodiment. The fourth diaphragm 52 is a plate-like member that is larger than the second diaphragm 12.

  The third diaphragm 51 and the fourth diaphragm 52 may have the same size or different sizes. In the present embodiment, the first diaphragm 11 and the second diaphragm 12 have the same size, the third diaphragm 51 and the fourth diaphragm 52 have the same size, and the first and first diaphragms. 2 is larger than the diaphragms 11 and 12.

  The material of the third and fourth diaphragms 51 and 52 is not particularly limited, but is preferably paper from the viewpoint of weight reduction, and in this embodiment, cardboard is used including the viewpoint of shape maintenance. From the viewpoint of improving interior properties, the outer surfaces of the third and fourth diaphragms 51 and 52 may be decorated and a photo frame may be added.

  Connecting members 53 are provided so as to connect one end and the other end of the third diaphragm 51 and one end and the other end of the fourth diaphragm 52, respectively. The connecting member 53 is two plate-like members provided to face each other. Although the material of the connection member 53 is not specifically limited, For example, it is papers and in this Embodiment, Japanese paper is used including the viewpoint of designability.

  The outline of the vibrator 50 of the present embodiment is formed by a third diaphragm 51, a fourth diaphragm 52, and a connecting member 53. An arbitrary member such as an illumination member such as an LED may be disposed inside the vibrator 50. When the lighting member is arranged inside the vibration exciter 50 and the connecting member 53 is Japanese paper, the interior property can be improved.

  Although the embodiments of the present invention have been described as described above, it is also planned from the beginning to combine the features of each embodiment as appropriate. Further, it should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is shown not by the above-described embodiment but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  10a, 10c, 20, 30, 40, 50 Exciter, 11, 41 First diaphragm, 13, 31 Magnet, 14 Yoke material, 15 Coil, 16 Cup-shaped yoke material, 16a, 17a Bottomed portion, 16a1, 17a1 Outer bottom surface, 16b, 17b flange portion, 17 bobbin, 18 elastic member, 21 second yoke material, 51 third diaphragm, 52 fourth diaphragm, 53 connecting member.

Claims (4)

A first diaphragm;
A magnet attached to the first diaphragm;
And a coil provided so as to face each other across the magnet and spacing,
The magnet is, Ru sphere der, vibrator. A second diaphragm disposed at a distance from the first diaphragm;
The vibrator according to claim 1 , wherein the coil is attached to the second diaphragm . Including a bottomed portion and a flange portion erected from both ends of the bottomed portion, further comprising a cup-shaped yoke material formed of a yoke,
The coil is arranged inside the cup-shaped yoke material,
The vibrator according to claim 2, wherein an outer bottom surface of the bottomed portion of the cup-shaped yoke material is bonded to the second diaphragm . The vibrator according to claim 3 , further comprising an elastic member provided between a tip of the flange portion of the cup-shaped yoke material and the first diaphragm .

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