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1. WO2008004729 - VIBREUR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims
[I] A vibrator 10 which, in response to an electric signal applied thereto, vibrates
according to variation in a magnetic force of a coil C and a resultant interaction of attraction and repulsion between the coil C and a magnet M, the vibrator 10
comprising:
a first motion unit 11 supporting either one of the coil C and the magnet M,
which oscillate due to an interaction therebetween; and
a second motion unit 12 supporting the first motion unit 11 in such a fashion that the first motion unit 11 can repetitively move up and down, the second motion
unit 12 repetitively moving up and down due to the motion force from the first
motion unit 11.
[2] The vibrator as claimed in claim 1, wherein the coil C is an annular voice coil
fixed to the center portion of the case 1 of the vibrator 10.
[3] The vibrator as claimed in claim 2, wherein the case 1 comprises a main body Ia and a cover Ib.
[4] The vibrator as claimed in claim 1, wherein the magnet M comprises annular
magnets 1 and 2 (Ml and M2), concentrically arranged and having different
diameters.
[5] The vibrator as claimed in claim 4, wherein the magnets 1 and 2 (Ml and M2)
are separated from each other to form an air gap therebetween.
[6] The vibrator as claimed in claim 1, wherein a top plate T is seated on the magnet

M.
[7] The vibrator as claimed in claim 4, wherein top plates 1 and 2 (Tl and T2) are
seated on upper surfaces of the magnets 1 and 2 (Ml and M2).
[8] The vibrator as claimed in claim 7, wherein the magnet 1 (Ml) is provided with a step in an outer peripheral portion of an upper surface thereof.
[9] The vibrator as claimed in claim 1, wherein the first motion unit 11 is a yoke.
[10] The vibrator as claimed in claim 1, wherein the first motion unit 11 is a leaf
spring having a low elastic modulus.
[II] The vibrator as claimed in claim 1, wherein the first motion unit 11 is an oscillating plate made of a synthetic resin.
[12] The vibrator as claimed in any one of claims 1, 9, and 10, wherein the magnet M is seated on the first motion unit 11.
[13] The vibrator as claimed in any one of claims 1 to 11, wherein the coil is seated
on the first motion unit 11.
[14] The vibrator as claimed in claim 1, wherein the first motion unit 11 is perforated in a center portion thereof.

[15] The vibrator as claimed in claim 1, wherein the first motion unit 11 is perforated in a center portion thereof so as to be bent in one direction.
[16] The vibrator as claimed in claim 1, wherein the second motion unit 12 comprises a leaf spring that has a high elastic modulus and surrounds the first motion unit

11 from a surface portion to an outer peripheral surface thereof.
[17] The vibrator as claimed in claim 1, wherein the second motion unit 12 is fixed at a center portion thereof to the case 1, and the outer peripheral portion thereof
protrudes in one direction, the center portion and the outer peripheral portion
being connected with each other by at least three elastic frames 12a, each
forming a curve in a circular shape.
[18] The vibrator as claimed in claim 1, wherein an end portion of the outer peripheral portion of the second motion unit 12 is bent inward to catch the first motion unit

11, seated thereon, or to catch the magnet M, which includes the first motion unit

11.
[19] The vibrator as claimed in claim 1, wherein a support member 13 is provided
between the second motion unit 12 and the first motion unit 11 to secure a range of downward repetitive motion of the first motion unit 11.
[20] The vibrator as claimed in claim 19, wherein the support member 13 is a ring
supporting the lower portion of the outer peripheral portion of the first motion
unit 11 with respect to the second motion unit 12.
[21] The vibrator as claimed in claim 19, wherein the support member 13 is a
projection step formed at the lower surface of the outer peripheral portion of the first motion unit 11.
[22] The vibrator as claimed in claim 19, wherein the support member 13 is a
projection step formed on an inner peripheral surface of the second motion unit

12.
[23] The vibrator as claimed in claim 1, wherein an outer peripheral portion of the
second motion unit 12 is impregnated into an inner peripheral surface of a main body Ia and is injection-molded.
[24] The vibrator as claimed in claim 3, wherein the case 1 is provided at a center
portion of the main body Ia thereof with a step Ic protruding upward and having a center hole.
[25] The vibrator as claimed in claim 3 or 24, wherein the case 1 is provided at a
center portion on one surface of the cover Ib thereof with a rod type shaft Id
having a recess formed in an end portion thereof, the shaft corresponding to a
center hole of the step Ic of the main body Ia.
[26] The vibrator as claimed in claim 1, 3, or 24, wherein the cover Ib is provided at a center portion on one surface thereof with a recessed shaft Id, and a recessed portion of the shaft Id enables press-fitting of the second motion unit 12 to the
step Ic of the main body Ia in such a manner that the leading end thereof passes through the center portion of the second motion unit 12 and a hole of the step Ic of the main body Ia so as to be exposed outside, and is then riveted by pressing the end portion of the leading end to thereby couple the cover Ib and the main
body Ia together.
[27] The vibrator as claimed in claim 1, wherein a supporting slant portion 13a is
formed at the lower surface of the first motion unit 11 contacting the second
motion unit 12 to secure a range of downward repetitive motion of the first
motion unit 11 with respect to the second motion unit 12.
[28] The vibrator as claimed in claim 27, wherein, in the supporting slant portion 13a of the first motion unit 11, a vertex portion of the lower surface coming into
contact with the second motion unit 12 supports the first motion unit 11 with
respect to the second motion unit 12.
[29] The vibrator as claimed in claim 9 or 27, wherein a weight 15 made of non- conductive tungsten is further adhered to a surface opposite the coil C of a yoke.

[30] The vibrator as claimed in claim 1, 2, or 3, wherein a separate magnetic body M3 is provided to an inner surface of the coil C fixed to the center portion of the
cover Ib.