JP2009028640A - Vibration generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration generating device which can avoid mutual interference between components such as coil and needle, and thereby, improve incorporation facility and qualitative performance of the device. <P>SOLUTION: This vibration generating device 10 is equipped with a needle 15 which is elastically supported through an annular leaf spring 19 inside a cover 12 of an enclosure 11, and a coil 14 for driving the needle 15, and vibrates the needle 15 by energizing the coil 14. In addition, a projecting part 24 or a recessed part 25 of such a dimensional size as to fit into the lower end part of the coil 14, is formed in the upper surface center of a bottom case 13, and the lower end part of the coil 14 is fitted into the projecting part 24 or the recessed part 25 and adhesively fixed during incorporating the coil 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration generating device, and more particularly to a vibration generating device that is incorporated in a mobile communication device such as a mobile phone or a PDA, a game device, etc., and notifies a user of an incoming call or a bodily sensation by vibration.

  As shown in FIG. 11, a conventional vibration generator of this type is provided in a housing 3 formed by integrally connecting a bottom case 1 and a cover 2 that are stators to each other, A movable element 6 formed from the magnet 4 and the movable part yokes 5a and 5b, and an annular leaf spring 7 interposed between the movable element 6 and the side wall of the housing 3 to elastically support the movable element 6. And a driving coil 8 fixed to the upper surface of the bottom case 1.

According to this vibration generator, when the coil 8 is energized, the mover 6 vibrates up and down by the electromagnetic force generated in the coil 8 and the magnetic flux generated in the magnet 6 of the mover 6 (for example, (See Patent Documents 1 and 2).
Japanese Patent No. 3375233 JP 2003-9495 A

  In the above-described conventional vibration generator, the lower end of the coil 8 is fixed to the center of the upper surface of the bottom case 1 of the housing 3 with an adhesive, but the upper surface of the bottom case 1 is flat as shown in FIG. Therefore, when the coil 8 is bonded, the coil 8 is likely to be displaced with respect to the bottom case 1.

  When the coil 8 is displaced, for example, the coil 8 and the magnet 4 of the mover 6 and the movable part yokes 5a and 5b interfere with each other, so that the assembling property of the parts deteriorates. In addition, the electromagnetic force generated between the coil 8 and the mover 6 is affected, thereby degrading the quality performance of the vibration generator.

  Therefore, a technical problem that should be solved in order to avoid the mutual interference of the parts and improve the quality performance of the vibration generating device arises, and the present invention aims to solve the problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is a housing in which a cover is integrally coupled to a bottom case, a housing disposed in the housing, and a magnet. And a movable part comprising a movable part yoke, an annular leaf spring interposed between the movable part and the housing, and a drive coil fixed to the bottom case, to the drive coil In the vibration generator configured to transmit the vibration generated in the mover by energization to the housing via the leaf spring, the size is fitted to the lower end of the coil at the center of the upper surface of the bottom case. Provided is a vibration generating device provided with a convex portion or a concave portion, and configured so that the lower end portion of the coil can be fitted and fixed to the convex portion or the concave portion when the coil is assembled.

  According to this structure, the said convex part or recessed part is formed in the coil assembly position in the upper surface center part of a bottom case. At the time of assembly, the lower end portion of the coil is fixed via an adhesive in a state of being fitted and fixed to the convex portion or concave portion on the bottom case side, that is, in a state of being fixed at the assembly position. Therefore, the coil is fixed without being displaced with respect to the bottom case.

  According to a second aspect of the present invention, there is provided the vibration generating device according to the first aspect, wherein the convex portion has a shape and size that fits with the inner diameter portion on the lower end side of the coil.

  According to this structure, since the convex part provided in the center part of the upper surface of the bottom case has a dimensional shape that fits the inner diameter part on the coil lower end side, the inner diameter part of the coil lower end part is outside the convex part when assembled. Bonded and fixed in a state of being fitted to the stepped portion.

  According to a third aspect of the present invention, there is provided the vibration generating device according to the first aspect, wherein the concave portion has a shape and dimension that fits with the outer diameter portion on the lower end side of the coil.

  According to this configuration, the recess provided in the center of the upper surface of the bottom case has a size and shape that fits with the outer diameter portion on the lower end side of the coil, so that the outer diameter portion of the coil is fitted to the peripheral portion of the recess when assembled. Bonded and fixed together.

  According to a fourth aspect of the present invention, there is provided the vibration generator according to the first aspect, wherein the concave portion is formed in a ring-shaped groove portion, and the groove portion has a size to be fitted to the lower end portion of the coil.

  According to this configuration, the recess provided in the central portion of the upper surface of the bottom case is formed in the ring-shaped groove, and the groove has a size that fits with the lower end of the coil. After application, the lower end of the coil is fitted and fixed to the groove to be bonded. Therefore, there is no risk that the adhesive will flow out of the groove, and the bonding area of the coil lower end is widened.

  According to a fifth aspect of the present invention, a lead wire recess for disposing a lead wire drawn out from the coil is provided on the upper surface of the bottom case, and the lead wire recess extends outward in the radial direction of the coil. 5. The vibration generation according to claim 1, 3, or 4, wherein a radially inner end of the lead wire recess communicates with the coil fitting recess provided in a central portion of the upper surface of the bottom case. Providing equipment.

  According to this configuration, the lead wire recess provided on the upper surface of the bottom case is formed in communication with the coil fitting recess to which the coil is fixed. The lead is pulled out from the combination recess through the lead wire recess. Therefore, the lead wire recess is pulled out in a state where the height is lowered as compared with the conventional method in which the lead wire is disposed on the upper surface of the bottom case.

  In particular, when the depth dimensions of the lead wire recess and the fitting recess are set larger than the thickness of the lead wire, the lead wire height can be pulled out without protruding from the top surface of the bottom case.

  According to the first aspect of the present invention, since the coil can be securely fixed at a predetermined position of the bottom case, during assembly, mutual interference between the stator side part and the mover side part, for example, the coil is connected to the magnet or the movable part yoke. Interference can be avoided, and the coil can be easily and quickly assembled to the bottom case.

  In addition, since the coil is securely fixed at the normal position with respect to the mover, the electromagnetic action generated between the coil and the mover is improved, and the quality and reliability of the vibration generator can be improved.

  In the invention according to claim 2, since the coil can be fixed by fitting the inner diameter portion of the coil to the outer step portion of the convex portion, in addition to the effect of the invention according to claim 1, the coil can be placed at a predetermined position of the bottom case. The coil can be fixed quickly and easily. Further, when the coil is manufactured, the inner diameter portion of the coil is manufactured and processed so as to accurately match the standard dimension, so that the fitting and assembling property of the coil to the convex portion is further improved.

  In the invention according to claim 3, since the coil can be fixed by fitting the outer diameter portion of the coil to the peripheral portion of the recess, the coil is placed at a predetermined position of the bottom case in addition to the effect of the invention according to claim 1. Can be fixed quickly and easily.

  In the invention according to claim 4, when the coil is bonded and fixed to the ring-shaped groove on the bottom case side, there is no possibility that the adhesive applied in the groove will flow out to the outside, so in addition to the effect of the invention according to claim 1 Thus, the coil can be bonded quickly and smoothly without being contaminated by the adhesive. In addition, since the bonding area of the coil is widened, the bonding strength of the coil can be increased as compared with the conventional case in combination with the adhesive not flowing out.

  According to the fifth aspect of the present invention, since the lead wire of the coil is pulled out in a state where the height is lowered by the lead wire recess provided in the bottom case, in addition to the effect of the first, third or fourth aspect of the invention The lead wire can be prevented from interfering with other components.

  In order to achieve the object of improving the quality performance of the vibration generator by improving the assembly performance of the vibration generator, avoiding interference between components such as coils and movers, and the like, a cover is provided on the bottom case. A housing integrally coupled; a mover comprising a magnet and a movable portion yoke disposed in the housing; and an annular leaf spring interposed between the mover and the housing; A vibration generator configured to transmit a vibration generated in the mover by energization of the driving coil to the housing via a leaf spring, and a driving coil fixed to the bottom case. A convex portion or a concave portion having a size and shape that fits with the lower end portion of the coil is provided at the center of the upper surface of the bottom case, and the lower end portion of the coil is fitted and fixed to the convex portion or the concave portion when the coil is assembled. Achieved by being able to .

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 is a perspective view of a vibration generator of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, FIG. 3 is a longitudinal sectional view of a mover of the vibration generator of FIG. 1, and FIG. 4 is a first embodiment of the present invention. FIG. 5 is a longitudinal sectional view of the vibration generator according to the second embodiment of the present invention, FIG. 6 is a perspective view showing the bottom case of FIG. 5, and FIG. FIG. 8 is a perspective view showing a bottom case of FIG. 7, and FIG. 9 shows a bottom case when a coil is not fixed according to a fourth embodiment of the present invention. FIG. 10 is a perspective view showing a bottom case when a coil is fixed according to a fourth embodiment of the present invention.

  In the figure, reference numeral 11 denotes a housing of the vibration generator 10, which is formed by integrally connecting a flat cylindrical cover 12 and a disk-shaped bottom case (stator) 13 to each other. ing. As shown in FIG. 2, a cylindrical driving coil 14 is fixed to the center of the upper surface of the bottom case 13, and a lead wire (not shown) is connected to the coil 14.

  A movable element 15 is accommodated in the casing 11, and the movable element 15 includes a flat bottomed cylindrical first movable part yoke (upper yoke) 16 having a lower surface opening as shown in FIG. And a disc-shaped magnet 17 fixed to the inner surface of the upper surface of the first movable portion yoke 16 and a disk-shaped second movable portion yoke (lower yoke) 18 fixed to the lower surface of the magnet 17. Has been.

  An annular leaf spring 19 is fixed to the lower portion of the first movable portion yoke 16, and an inner peripheral portion 21 of the leaf spring 19 is fitted and fixed to an outer peripheral step portion below the first movable portion yoke 16. Further, the outer peripheral portion 22 of the leaf spring 19 is fixed to the side wall of the housing 11. A ring-shaped space S is formed between the inner peripheral surface of the first movable portion yoke 16 and the outer peripheral surfaces of the magnet 17 and the second movable portion yoke 18, and the upper portion of the coil 14 is inserted into the space S. Has been.

  In the vibration generator 10, vertical vibration is generated in the mover 15 by the electromagnetic force generated in the coil 14 by energization and the magnetic flux generated by the magnet 15. The vibration generated in the mover 15 is transmitted to the cover 12 of the housing 11 via the leaf spring 19.

  Next, the characteristic part of a present Example is demonstrated. In the present embodiment, by providing a convex part 24 or a concave part 25 for fitting and fixing the coil 14 at the center of the upper surface of the bottom case 13, the position of the coil 14 relative to the bottom case 13 can be shifted when assembling the parts. This prevents the interference between components and improves the quality performance of the vibration generator 10.

  Hereinafter, specific examples of the present invention will be described. FIG. 4 shows a first embodiment of the present invention. As shown in the figure, a convex portion 24 is provided at the center of the upper surface of the bottom case 13 of the casing 11, and the convex portion 24 is formed in a rectangular cross section. The outer peripheral portion 24 a of the convex portion 24 has a shape dimension that fits with the inner diameter portion 14 a on the lower end side of the coil 14.

  Thus, by providing the convex portion 24 at the center of the upper surface of the bottom case 13, the inner diameter portion 14 a on the lower end side of the coil 14 is fitted to the step portion on the outer peripheral portion 24 a side of the convex portion 24 when the coil 14 is assembled. Can be assembled together.

  That is, the coil 14 is assembled to the bottom case 13 using an adhesive (not shown) at a predetermined assembly position. Thus, the coil 14 can be accurately bonded and fixed to the normal position of the bottom case 13. Therefore, it is reliably avoided that the coil (component on the stator side) 14 interferes with components such as the magnet 17 and the movable portion yoke 18.

  In particular, when the coil 14 is manufactured, the inner diameter portion 14a of the coil 14 is precisely dimensioned so as to be a standard size of a standard product, so that the work at the time of fitting and fixing the coil 14 to the convex portion 24 is performed. The property is significantly improved.

  Further, since the coil 14 can be accurately bonded and fixed to the mover 15 at a regular position, the electromagnetic action generated between the coil 14 and the mover 15 is improved, and the quality performance and reliability of the vibration generator 10 are improved. Enhanced.

  5 and 6 show a second embodiment of the present invention. As shown in both figures, a concave portion 25 is provided in the central portion of the upper surface of the bottom case 13 of the casing 11, and the concave shape of the concave portion 25 is formed in a circular shape. The outer peripheral portion 25 a of the concave portion 25 has a shape dimension that fits with the outer diameter portion 14 b on the lower end side of the coil 14.

  Thus, by providing the concave portion 25 having a circular shape in plan view at the center of the upper surface of the bottom case 13, 14 b on the lower end side of the coil 14 is fitted to the step portion of the outer peripheral portion 25 a of the concave portion 25 when the coil 14 is assembled. Assembled. Therefore, the coil 14 is easily and quickly bonded and fixed to the bottom case 13 without being displaced.

  Further, mutual interference between the coil 14 side component and the bottom case 13 side component can be avoided, and the quality performance of the vibration generator 10 can be greatly improved.

  7 and 8 show a third embodiment of the present invention. As shown in both figures, a ring-shaped groove 26 is provided at the center of the upper surface of the bottom case 13 of the housing 11, and the diameter and width of the groove 26 are the diameter and width of the lower end 14 c of the coil 14. It corresponds to the dimension. For this reason, it forms so that the lower end part 14c of the coil 14 may fit in this groove part 26. FIG.

  Thus, since the dimension shape of the groove part 26 is formed so that the lower end part 14c of the coil 14 can be fitted, after the adhesive agent is applied in the groove part 26 when the coil 14 is assembled, the groove part 26 is formed. The lower end portion 14c of the coil 14 can be easily inserted and fitted to be bonded and fixed.

  Therefore, it has the same effect as the second embodiment and the third embodiment, and avoids the mutual interference between the coil 14 and the parts such as the mover 15 and improves the quality performance of the vibration generator 10.

  Furthermore, there is no possibility that the adhesive flows out of the groove 26 from the groove 26, and the coil 14 can be easily bonded. Moreover, since the area of the adhesion part of the coil 14 with respect to the groove part 26 becomes large, coupled with the fact that the adhesive does not flow outside, the adhesion strength of the coil 14 is greatly increased.

  9 and 10 show a fourth embodiment of the present invention. As shown in both figures, a lead wire recess 28 for laying a lead wire (not shown) routed from the coil 14 is formed on the top surface of the bottom case 13, and the lead wire recess 28 is formed. Is formed so as to extend outward in the radial direction of the coil 14. Further, the radially inner end of the lead wire recess 28 is formed in communication with the coil fixing groove 26 or recess 25. In particular, the depth of the lead wire recess 28 and the depth of the groove 26 or the recess 25 are set to be larger than the outer diameter of the lead wire.

  According to this configuration, the lead wire recess 28 is formed so as to communicate with the groove 26 or the recess 25 on the upper center side of the bottom case 13, so that the lead wire of the coil 14 is connected to the outer edge of the groove 26 or the recess 25. The lead wire recess 28 is led out to the outside of the bottom case 13. Therefore, since the lead wire is pulled out without protruding from the upper surface of the bottom case 13, it is possible to prevent the lead wire from interfering with other components.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

The perspective view of the vibration generator which shows one Example of this invention. The exploded perspective view of FIG. The longitudinal cross-sectional view of the needle | mover of the vibration generator of FIG. BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view of a vibration generator which shows 1st Example of this invention. The longitudinal cross-sectional view of the vibration generator which shows 2nd Example of this invention. FIG. 6 is a perspective view showing the bottom case of FIG. 5. The longitudinal cross-sectional view of a vibration generator which shows 3rd Example of this invention. The perspective view which shows the bottom case of FIG. The perspective view which shows 4th Example of this invention and shows a bottom case when the coil is not being fixed. The perspective view which shows 4th Example of this invention and shows a bottom case when the coil is being fixed. The longitudinal cross-sectional view of a vibration generator which shows a prior art example. The perspective view of a bottom case which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vibration generator 11 Case 12 Cover 13 Bottom case 14 Driving coil 15 Movable element 16 First movable part yoke (upper yoke)
17 Magnet 18 Second movable part yoke (lower yoke)
19 Leaf spring (diaphragm)
24 Convex 25 Concave 26 Ring Groove 28 Lead Wire Concave

Claims (5)

A case in which a cover is integrally coupled to the bottom case; a mover that is disposed in the case and includes a magnet and a movable portion yoke; and an annular member interposed between the mover and the case A leaf spring and a driving coil fixed to the bottom case are provided, and vibration generated in the mover by energizing the driving coil is transmitted to the housing via the leaf spring. In the vibration generator,
A convex portion or a concave portion having a size and shape that fits with the lower end portion of the coil is provided at the center of the upper surface of the bottom case, and the lower end portion of the coil is fitted and fixed to the convex portion or the concave portion when the coil is assembled. A vibration generator characterized in that it can be configured.   The vibration generating device according to claim 1, wherein the convex portion has a shape dimension that fits with an inner diameter portion on a lower end side of the coil.   2. The vibration generating device according to claim 1, wherein the concave portion has a shape dimension that fits with an outer diameter portion on a lower end side of the coil.   2. The vibration generating device according to claim 1, wherein the concave portion is formed in a ring-shaped groove portion, and the groove portion has a size to be fitted to the lower end portion of the coil.   On the upper surface of the bottom case, there is provided a lead wire recess for disposing a lead wire drawn from the coil, the lead wire recess is formed to extend outward in the radial direction of the coil, and 5. The vibration generating device according to claim 1, wherein an inner end in a radial direction of the lead wire recess communicates with the recess provided in a central portion of the upper surface of the bottom case.

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