JP3833429B2 - Vibration generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration generating device equipped in a mobile phone or the like to notify an incoming call by vibration.
[0002]
[Problems to be solved by the invention]
Some communication devices such as mobile phones have a so-called vibrator function that notifies the user of incoming calls by vibration.
[0003]
FIGS. 5 and 6 relate to a conventional vibration generator that is mounted on such a cellular phone or the like and generates a vibration for notifying an incoming call.
[0004]
This conventional vibration generator is an application of the driving principle of a moving coil type electroacoustic transducer. A disk-shaped vibrating body 1 is supported on a support frame 3 by a damper 2 integrally formed on the outer periphery thereof. Yes.
[0005]
A cylindrical bobbin 4 is bonded to the back surface of the continuous portion between the vibrating body 1 and the damper 2, and a coil 5 is wound around the outer peripheral surface of the bobbin 4.
[0006]
A dish-shaped yoke 6 is attached to the support frame 3 with its outer peripheral portion fixed to the back side of the support frame 3.
[0007]
A magnet 7 is attached to the inside of the bottom of the yoke 6, and a plate 8 is attached to an end of the magnet 7 opposite to the side to which the yoke 6 is attached. The magnet 7 and the plate 8 are attached to the bobbin 4. Located at the inner central portion, the outer peripheral surface of the plate 8 and the bobbin 4 are opposed to each other with a required gap therebetween.
[0008]
On the front side of the donut-shaped support frame 3, the annular collision part 3 </ b> A is located at the center of the inside of the support frame 3 and is opposed to the front side of the vibrating body 1 with a predetermined gap. Are integrally formed in a state supported by the support beam 3B.
[0009]
The inner end portion of the support frame 3 is opposed to the continuous portion of the vibrating body 1 and the damper 2.
[0010]
This vibration generator is attached to a mobile phone or the like, and when a low-frequency current generated by the incoming call to the mobile phone or the like flows through the coil 5, the bobbin 4 Is driven to vibrate the vibrator 1.
[0011]
The continuous portion with the damper 2 collides with the inner end portion of the collision portion 3A due to the vibration of the vibration body 1, and the vibration is transmitted to the casing of the mobile phone or the like via the collision portion 3A and the support frame 3. The user who has this cellular phone or the like is notified of the incoming call.
[0012]
Since this vibration generator can reliably extract vibration energy, and can reliably notify the arrival of a call in a mobile phone or the like, and can be configured to be thin and small. It has the advantage that it can contribute to size reduction of the mobile phone etc. equipped with.
[0013]
However, as described above, in this vibration generating device, since vibration for notifying incoming calls in a mobile phone or the like is generated by the collision between the vibrating body 1 and the collision unit 3A, the driving unit is given strength. In particular, there is a problem that the coil 5 wound around the bobbin 4 may be detached from the bobbin 4 due to an impact caused by a collision between the vibrating body 1 and the collision portion 3A.
[0014]
The present invention has been made to solve the problems of the conventional vibration generator as described above.
That is, an object of the present invention is to make it possible to sufficiently ensure the strength of the drive unit in a vibration generating device that generates vibration by a collision in the drive unit.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the vibration generator according to the present invention has a coil attached to a vibrating body arranged in a magnetic field formed by a magnet, and when the coil is energized, the vibrating body is caused by the action of the magnetic field. In a vibration generating device that generates vibration by colliding with a collision portion that is arranged so as to be opposed to the vibrating body, the coil housing portion that houses the coil is formed integrally with the vibrating body. with housing portion is disposed within the magnetic field formed by the magnet, the coil is attached to the vibrating body by being housed in the coil accommodating portion, the coil housed in the coil accommodating portion is fixed by the adhesive resin And a plate covering the adhesive resin in the coil housing portion is provided.
[0016]
The vibration generator according to the present invention is used for applications such as a vibrator function that is attached to a mobile phone and notifies a user of an incoming call by vibration.
[0017]
That is, when attached to a mobile phone or the like, the coil is connected so that a low-frequency current flows when an incoming call is received.
[0018]
When a low-frequency current due to incoming calls flows through the coil housed in the coil housing unit formed integrally with the vibrating body, the coil is vibrated in the direction of vibration by the action of this coil and the magnetic field formed by the magnet. And the vibration body vibrates and collides with a collision portion disposed so as to face the vibration body, and the vibration generated by the collision between the vibration body and the collision portion is applied to the main body of the mobile phone or the like. Communicated.
[0019]
When the vibrating body collides with the collision portion, the coil is attached to the vibrating body in a state of being housed in a coil housing portion formed integrally with the vibrating body. As described above, according to the first aspect of the present invention, even if an impact caused by a collision between the vibrating body and the collision portion during driving of the vibration generating device is applied to the coil, the coil is removed from the vibrating body. There is no risk of falling off, and sufficient strength is ensured.
[0020]
In addition, since the coil accommodated in the coil accommodating part is fixed by an adhesive resin, the coil is fixed by the adhesive resin in the coil accommodating part, thereby causing a collision between the vibrating body and the collision part. The strength against impact is further enhanced.
[0021]
Further, by covering the adhesive resin in the coil housing portion with a plate, the strength against impact caused by a collision can be further enhanced.
[0022]
Further, in addition to the above-described configuration, an elastic body is attached to a portion of the collision portion that faces the vibrating body.
[0023]
According to this, an elastic body is attached to a portion of the collision portion that faces the vibrating body, and the elastic body collides with the vibrating body, thereby reducing the impact sound generated at the time of the collision. In addition, the shock at the time of collision with the vibrating body can be reduced.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that are considered to be most suitable for the present invention will be described in detail below with reference to the drawings.
[0025]
1 to 3 are views showing a main part of a vibration generator in an example of an embodiment of the present invention.
[0026]
1 to 3, the configuration of the yoke 6, the magnet 7 and the plate 8 is almost the same as the configuration of the conventional vibration generating device shown in FIGS. 5 and 6, and is given the same reference numerals.
[0027]
1 to 3, a disk-shaped vibrating body 10 and an edge damper 11 that elastically supports an outer edge portion of the vibrating body 10 with respect to the support frame 3 have a U-shaped cross section. It is formed integrally through an annular recess 12 formed annularly along the outer edge.
[0028]
The vibrating body 10, the edge damper 11, and the annular recess 12 are integrally formed, for example, by applying pressure while heating the resin film.
And in this annular recessed part 12, the coil 13 wound by the ring shape is accommodated in the state by which it was fitted so that it may expand in FIG.
[0029]
Then, in a state where the coil 13 is suspended and supported at a predetermined position in the annular recess 12, the adhesive resin 14 is poured from an opening portion that opens toward the front side (the upper side in FIG. 3) of the vibrating body 10 of the annular recess 12. As a result, the coil 13 is fixed at a predetermined position in the annular recess 12.
[0030]
The vibrating body 10 is supported by connecting the outer edge portion of the edge damper 11 to the inner edge portion of the ring-shaped support frame 20 that supports the yoke 6 and the magnets 7 and 8.
[0031]
At this time, the annular recess 12 is positioned between the outer peripheral portion of the plate 8 mounted on the magnet 7 and the inner peripheral portion of the yoke 6, and the plate 8 and the yoke 6 are respectively interposed through required gaps. Opposed.
[0032]
On the inner side of the support frame 20, a ring-shaped collision portion 20 </ b> A disposed at a position facing the annular recess 12 is integrally formed with the support frame 20 by being supported by the support beam 20 </ b> B.
[0033]
And the elastic body 15 shape | molded with rubber | gum etc. is attached to the position facing the annular recessed part 12 of the inner side edge part (lower edge part in FIG. 1 thru | or 3) of this collision part 20A.
[0034]
The vibration generator is used for applications such as a vibrator function that is attached to a mobile phone and notifies a user of an incoming call by vibration.
That is, when this vibration generator is attached to a cellular phone, the coil 13 is connected so that a low-frequency current flows when an incoming call is received.
[0035]
Then, when a low-frequency current due to the incoming call flows through the coil 13, the annular recess 12 is driven by the action of the magnetic field between the coil 13 and the plate 8, and the annular recess 12 is integrally formed. The vibrating body 10 vibrates.
[0036]
And the periphery of the opening part of the annular recessed part 12 collides with the elastic body 15 attached to the inner side edge part of the collision part 20A which opposes this by the vibration of this vibrating body 10, and the vibration produced by this collision is produced. It is transmitted to the casing of the mobile phone through the support frame 20.
[0037]
As a result, the casing of the mobile phone vibrates, and the user holding the mobile phone in a clothes pocket or the like can know the incoming call.
[0038]
Since the coil 13 is mounted in the annular recess 12 formed integrally with the vibrating body 10 and the annular recess 12 and is fixed by the adhesive resin 14, the vibration generating device collides with the vibrating body 10 during driving. Even if an impact due to the collision of the portion 20A is applied to the coil 13, there is no possibility that the coil 13 will drop off from the vibrating body 10, and sufficient strength is ensured.
[0039]
Further, the vibration generator has an elastic body 15 attached to the inner end of the collision portion 20A, and the elastic body 15 collides with the vibration body 10, thereby generating an impact sound generated at the time of the collision. While being able to make small, the shock at the time of the collision with respect to the vibrating body 10 can be relieved.
[0040]
FIG. 4 shows a specific example in the embodiment of the vibration generator according to the present invention. In the vibration generator in this example, a donut-shaped plate 30 is attached to the open end of the annular recess 12, and the coil 13. The surface of the adhesive resin 14 that fixes is covered.
[0041]
Other parts are as described above, and are given the same reference numerals.
[0042]
In the vibration generator according to this specific example , when the vibrating body 10 and the elastic body 15 of the collision portion 20A collide by vibration, the elastic body 15 is applied to the surface of the adhesive resin 14 fixing the coil 13 by the plate 30. Since direct contact is avoided, the strength against impact caused by the collision of the drive unit of the vibration generator is further increased.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example in an embodiment of the present invention.
FIG. 2 is a side sectional view of the same example.
FIG. 3 is a partial enlarged cross-sectional view showing a main part of the example.
FIG. 4 is a side sectional view showing a specific example in the embodiment of the present invention.
FIG. 5 is a perspective view showing a conventional example.
FIG. 6 is a side sectional view of the conventional example.
[Explanation of symbols]
6 ... yoke 7 ... magnet 8 ... plate 10 ... vibrating body 11 ... edge damper 12 ... annular recess (coil housing part)
DESCRIPTION OF SYMBOLS 13 ... Coil 14 ... Adhesive resin 15 ... Elastic body 20 ... Support frame 20A ... Colliding part 20B ... Support beam

Claims (2)

The coil attached to the vibrating body is disposed in a magnetic field formed by a magnet, and when the coil is energized, the vibrating body is vibrated by the action of the magnetic field and disposed so as to face the vibrating body. In a vibration generator that generates vibration by colliding with
Vibration by the coil accommodating portion for accommodating the coil is molded integrally with the vibrating body, together with the coil receiving portion is disposed within the magnetic field formed by the magnet, the coil is accommodated in the coil accommodating portion Attached to the body ,
While the coil housed in the coil housing portion is fixed by an adhesive resin,
A vibration generator comprising a plate covering the adhesive resin in the coil housing portion .   The vibration generating apparatus according to claim 1, wherein an elastic body is attached to a portion of the collision portion that faces the vibrating body.

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