JPH0993860A - Fixing structure for flat oscillation motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sufficiently large oscillation in the direction of thrust while preventing removal due to variation of fixing strength caused by variation in the environment by providing the case or bottom plate with a fixing plate having a resilient part deformable upon occurrence of oscillation and holding the end part of fixing plate on the main apparatus. SOLUTION: A fixing plate 6 is formed to extend radially from the outer circumference of the case 1 for a flat oscillation motor 10 and resilient parts are formed between the motor 10 and the opposite ends of fixing plate 6. The resilient part is formed by extending a part of the case 1 or a bottom plate 2 as the fixing plate 6 and bending the fixing plate 6 arcuately downward to form curved parts 6a, 6a'. The motor 10 is fixed to a main apparatus 1 through the fixing plate 6. Upon occurrence of vibration, radial vibration can be deflected efficiently into the trust direction and a constant fixing strength can be sustained over a long term.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat vibration motor mounting structure in which a plurality of air-core coils are eccentrically arranged on one side of a rotor. For example, a pager or PHS (simple mobile phone) is provided. The present invention can be used for such purposes as making a vibration to notify the reception of an individual call signal in a telephone or the like.

[0002]

2. Description of the Related Art As a flat vibration motor applied to a pager, PHS, etc., a flat vibration motor as shown in FIG. 7 has been proposed by the present inventor. In FIG. 7, the circular bottom plate 2 has a hole 2a at the center, and a fixed shaft 7 is fixed to the hole 2a. A drive magnet 5 is attached on the bottom plate 2 and on the outer peripheral side of the hole 2a. The bottom plate 2, the fixed shaft 7, and the drive magnet 5 constitute a motor stator.

An eccentric rotor 4 is attached to the outer peripheral surface of the fixed shaft 7. The eccentric rotor 4 is fan-shaped and has a hole 4b at a position deviated from the center of gravity. The outer edge of the hole 4b is a cylindrical bearing portion 4c, and the hole 4b is formed on the inner peripheral surface of the bearing portion 4c.
The eccentric rotor 4 is attached to the fixed shaft 7 by inserting a hole communicating with the fixed shaft 7 into the fixed shaft 7. A washer 12 is interposed between the lower end surface of the bearing portion 4c and the bottom plate 2, and the washer 12 supports the eccentric rotor 4 in the thrust direction. The eccentric rotor 4 is supported in the radial direction by the outer peripheral surface of the fixed shaft 7. As a result, the eccentric rotor 4 is rotatable with respect to the stator including the bottom plate 2, the drive magnet 5, the fixed shaft 7, and the like. ing.

The eccentric rotor 4 has a plurality of holes 4a formed concentrically around the hole 4b, and the coil 3 is attached to each hole 4a. The lower end surface of the coil 3 faces the drive magnet 5 attached to the bottom plate 2 with a gap. Therefore, by controlling the energization of the coil 3, the coil 3 is biased by the drive magnet 5, and the eccentric rotor 4 is rotationally driven with respect to the stator.

A case 1 is mounted on the outer peripheral surface of the fixed shaft 7 and above the eccentric rotor 4. The case 1 is cup-shaped and has a peripheral wall on the outer periphery, and the lower end of the peripheral wall is attached to the outer edge of the bottom plate 2.
Therefore, the bottom plate 2, which is the stator, the drive magnet 5,
The eccentric rotor 4 and the stator composed of the fixed shaft 7 and the like are housed inside the case 1.

In the flat type vibration motor 10, when the eccentric rotor 4 is rotationally driven by switching the energization of the coil 3 as described above, vibration is generated due to the unbalance of the weight of the eccentric rotor 4. ing. Therefore, the eccentric rotor 4 is continuously driven to rotate by switching the energization of each coil 3 according to the rotational position of the eccentric rotor 4, and the vibration due to the imbalance of the weight of the eccentric rotor 4 is continuously generated.

[0007]

In the flat type vibration motor 10 shown in FIG. 8, the double-sided tape 2 is formed on the lower end surface of the bottom plate.
0 is attached and the main unit 1 such as pager or PHS
Attached to 1. The flat vibration motor 10 is covered with a cover 21, and a cushion 23 is sandwiched between the cover 21 and the case of the flat vibration motor 10. However, since the double-sided tape 20 is easily deteriorated by the environment, if the flat-type vibration motor 10 is driven and vibrated while the adhesiveness is weakened, the double-sided tape 20 is peeled off and the flat-type vibration motor 10 is kept in a predetermined state. It becomes difficult to hold it in position.

In PHS, etc., the flat vibration motor 1
Since 0 is arranged so as to be substantially parallel to the human body, the vibration effect in the thrust direction is higher than the vibration in the radial direction, but the notification in the thrust direction can be achieved by simply attaching the double-sided tape 20 as described above. No vibration can be obtained and a sufficient notification effect cannot be obtained.

The present invention has been made in order to solve the problems of the prior art as described above, and the mounting strength does not change due to a change in the environment, and the flat type vibration motor is operated. It is another object of the present invention to provide a mounting structure for a flat type vibration motor capable of obtaining vibration of a sufficient magnitude in the thrust direction.

[0010]

According to the first aspect of the present invention,
A flat cup-shaped case, a bottom plate that covers the opening of the case, an eccentric rotor that has a coil housed in the space formed by the case and the bottom plate, and a drive magnet that is arranged to face the coil, and vibration is generated by the rotation of the eccentric rotor. A flat vibration motor mounting structure in which a generated flat vibration motor is mounted to a main body device, and a case or a bottom plate is provided with a mounting plate having an elastic portion that can be deformed when vibration is generated. The part is held by the main body device.

According to a second aspect of the present invention, the mounting plate is formed so as to extend in the radial direction from the outer circumference of the case, and a cutout portion or a curved portion is formed at the extended portion. Characterize.

According to a third aspect of the present invention, the mounting plate is formed so as to extend in the thrust direction from the outer periphery of the case, and
The flat vibration motor mounting structure according to claim 1, wherein a cutout portion or a curved portion is formed in the extended portion.

When the flat type vibration motor is rotationally driven to generate vibration, the elastic portion of the mounting plate attached to the case or the bottom plate is elastically deformed by the vibration, and the vibration is generated in the thrust direction.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a flat vibration motor according to the present invention will be described below with reference to the drawings. The configuration of the flat vibration motor itself is the same as that of the conventional example described above, and therefore the same reference numerals are given and the description thereof is omitted. 1 and 2, a mounting plate 6 is attached to the flat vibration motor 10. The mounting plate 6 has a rectangular planar shape, and the flat vibration motor 10 is located at the center in the longitudinal direction. For this reason, the mounting plate 6 has a form in which it is formed so as to extend in the radial direction from the outer periphery of the case 1 of the flat vibration motor 10. In such a mounting plate 6, elastic portions are formed at both ends of the mounting plate 6 and between the flat vibration motor 10. In FIGS. 1 and 2, the elastic portions are curved portions 6a and 6a ′ formed by bending the mounting plate 6 downward in an arc shape. The mounting plate 6 is formed by extending a part of the case 1 or the bottom plate 2.

The flat type vibration motor 10 having the mounting plate 6 on which the curved portions 6a and 6a 'are formed is mounted on the main body device 11 such as PHS with the mounting plate 6 interposed. There is. The main body device 11 has a recess 11a, and holding members 12 and 1 are provided on both sides of the edge of the recess 11a.
2 'is attached. The holding members 12, 12 'are
Fixing parts 12a and 12a 'fixed to the main body device 11 by screwing and the like, and holding part 12 that is located above the fixing parts 12a and 12a' and holds both ends of the mounting plate 6.
b, 12b '. Appropriate gaps A and B are provided between both end surfaces of the mounting plate 6 and the fixed portions 12a and 12a '. The holding members 12 and 12 'are arranged at the edges on both sides with the recess 11a as the center, and the ends of the holding portions 12b and 12b' arranged on both sides face each other.

By inserting the tip portions on both sides of the mounting plate 6 attached to the flat type vibration motor 10 into the holding portions 12b and 12b ', the flat type vibration motor 10 is located above the recess 11a of the main body device 11. Are arranged. It should be noted that the mounting plate 6 has curved portions 6a and 6a 'which are also elastic portions on both sides thereof, and these curved portions 6a and 6a' also have the concave portions 11a.
Is located inside.

In the mounting structure of the flat type vibration motor 10 as described above, when the eccentric rotor 4 is rotationally driven by switching the energization of the coil 3 as described above,
Vibration is generated due to the imbalance of the weight of the eccentric rotor 4, and the eccentric rotor 4 is continuously driven to rotate by switching the energization of each coil 3 according to the rotational position of the eccentric rotor 4. The flat vibration motor 10 continuously vibrates due to the imbalance in weight, and the vibration is emitted toward the outside of the flat vibration motor 10. In this case, the flat vibration motor 10 vibrates in the radial direction, but the bending portions 6a, 6a 'of the mounting plate 6 to which the flat vibration motor 10 is attached are elastically deformed by the vibration in the radial direction. As a result, the vibration in the radial direction is replaced with the vibration in the thrust direction, and the vibration is emitted in the direction indicated by the symbol C in FIG.

According to the flat vibration motor mounting structure as described above, the mounting plate 6 having the elastic portions (curved portions 6a, 6a ') which can be deformed when vibration is generated is provided on the case 1 or the bottom plate 2. Moreover, since the end portion of the mounting plate 6 is held by the main body device and the flat type vibration motor is mounted on the mounting plate 6, the vibration generated in the radial direction is caused by the deformation of the elastic portion, that is, both the curved portions 6a, 6a '. Since the thrust direction can be changed efficiently, a sufficient vibration notification effect can be obtained. In addition, without using an adhesive or a tape, the mounting plate 6 is held by the holding members 12 and 12 ′ screwed to the main body device 11, and the flat vibration motor 10 is attached to the main body device 1.
Since it is attached to No. 1, the attachment strength does not change with the passage of time or changes in the environment, and a constant attachment strength can always be maintained. Further, the amount of vibration can be changed by changing the size of the elastic portion of the mounting plate 6 attached to the flat vibration motor 10, that is, the size of the curved portions 6a, 6a 'or the length of the mounting plate 6. There is also.

Although the holding members 12 and 12 'are fixed to the main body device 11 by screwing in the above embodiment, the present invention is not limited to this. It may be fixed by welding. As in the case of screwing, the mounting strength does not change with the passage of time or changes in the environment, and a constant mounting strength can always be maintained. The mounting plate 6 may be a single plate or two plates that are coupled to the flat vibration motor 10 at symmetrical positions.

Next, another embodiment of the mounting structure for the flat vibration motor will be described. In FIG. 3A, the flat vibration motor 10 is attached to the main body device 11. The flat type vibration motor 10 includes two mounting plates 16 and 16 ′ formed on either the case 1 or the bottom plate 2 so as to extend in the thrust direction (direction orthogonal to the surface of the main body device 11) from the outer periphery of the case 1. have. The tip ends of the mounting plates 16 and 16 'are inserted into holes 11b and 11b' formed on the main body device 11, and the main body device 11
It is placed on top. In addition, the mounting plates 16 and 16 ',
Two elastic portions, that is, curved portions 16a and 16a 'are formed in a portion between the flat vibration motor 10 and the main body device 11, respectively.

In the mounting structure of the flat type vibration motor as described above, when the eccentric rotor 4 is rotationally driven by switching the energization of the coil 3 as described above, vibration is generated due to the imbalance of the weight of the eccentric rotor 4. The eccentric rotor 4 is continuously driven by switching the energization of each coil 3 depending on the rotational position of the eccentric rotor 4, and the flat vibration motor 10 is driven by the unbalance of the weight of the eccentric rotor 4. It vibrates continuously, and vibration is emitted to the outside of the flat vibration motor 10. Although the flat vibration motor 10 vibrates in the radial direction, the bending portions 16a and 16a ′ of the mounting plate 16 attached to the flat vibration motor 10 are deformed by the radial vibration, and the vibration direction is C. It can be changed to the thrust direction shown.

According to the mounting structure of the flat type vibration motor as described above, the elastic structure is formed so as to extend from the outer periphery of the case 1 in the thrust direction with respect to the case 1 or the bottom plate 2 and is deformable when vibration occurs. Section (curved portions 16a, 1
6a ′) having mounting plates 16 and 16 ′ and arranging the tip end portions of the mounting plates 16 and 16 ′ on the main body device 11 to dispose the flat vibration motor 10 on the main body device 11. Unlike the case where a tape or the like is used, the mounting strength does not change with the passage of time or changes in the environment, and it is possible to maintain a constant mounting strength at all times. It is possible to eliminate the disengagement. Further, the flat vibration motor 10 can be planarly mounted on the main body device 11, and the manufacturing cost can be reduced. Further, since the mounting plates 16 and 16 ′ formed to extend in the thrust direction from the outer periphery of the case 1 are provided with the curved portions 16a and 16a ′ which are elastic portions, the flat vibration motor 10 operates. At this time, the bending portions 16a and 16a ′ are deformed, so that the vibration in the radial direction can be efficiently changed to the thrust direction, and a notification effect by sufficient vibration can be obtained.

The flat vibration motor 10 is mounted on the main body device 11 by using the two mounting plates 16 and 16 'extending in the thrust direction, but the present invention is not limited to this. As shown in FIG. 3B, the flat vibration motor 10 may be attached to the main body device 11 in a cantilevered manner by using only one attachment plate 17 extending in the thrust direction. Similar to the above-described embodiment, the mounting plate 17 has a curved portion 17a that is an elastic portion.
When a is deformed by the vibration in the radial direction, vibration can be generated in the thrust direction.

Next, still another embodiment of the mounting structure for the flat vibration motor will be described. In FIG. 4, a flat vibration motor 10 is attached to the main body device 11. The flat vibration motor 10 includes two mounting plates 18, which are formed on either the case 1 or the bottom plate 2 so as to extend in a direction in which the thrust direction and the radial direction are aligned with each other from the outer periphery of the case 1, that is, an oblique direction. 18 '. The mounting plates 18 and 18 ′ are flat vibration motors 10.
Curved portions 18a, 1 bent at an obtuse angle to a position close to
8a '. The curved portion 18 is also provided at the end of the mounting plate 18, 18 ′ on the opposite side away from the flat vibration motor 10.
b, 18b 'are formed, and the curved portions 18b, 1b are formed.
8b 'is used to attach the mounting plates 18, 18' to the tips 18c, 1
8 c ′ is parallel to the upper end surface of the main body device 11.

In the main body device 11 to which the flat type vibration motor 10 having the mounting plates 18 and 18 'is attached, the holding portions 11c and 11c' are arranged outside the flat type vibration motor 10.
Are integrally molded. The holding portions 11c and 11c ′ include the protrusions 11d and 11d ′ and the extending portion 11 that extends from the upper ends of the protrusions 11d and 11d ′ in parallel with the surface of the main body device 11.
e, 11e '. Extension 11e, 1
There are gaps A and B between the lower surface of 1e ′ and the upper surface of the main body device 11, and the tip portions 18c and 18c ′ of the mounting plates 18 and 18 ′ are in the minute gaps A and B. Inserted,
Therefore, the flat vibration motor 10 has the holding portions 11c and 11c.
held in c '.

In the mounting structure of the flat type vibration motor 10 as described above, when the eccentric rotor 4 is rotationally driven by switching the energization of the coil 3 as described above,
Vibration is generated due to the imbalance of the weight of the eccentric rotor 4, and the eccentric rotor 4 is continuously driven to rotate by switching the energization of each coil 3 according to the rotational position of the eccentric rotor 4. The flat vibration motor 10 continuously vibrates due to the imbalance of weight, and the vibration is emitted to the outside of the flat vibration motor 10 in the radial direction. Vibration in the radial direction is caused by deformation of the elastic portions including the bending portions 18a and 18b, and the bending portions 18a ′ and 18b ′ of the mounting plate 18 attached to the flat vibration motor 10 due to the radial vibration. Is changed to the vibration in the thrust direction, and the vibration is emitted in the direction indicated by the symbol C.

According to the mounting structure of the flat vibration motor 10 as described above, the case 1 or the bottom plate 2 is
The mounting plate 18 is formed so as to extend in a direction in which the thrust direction and the radial direction are combined with each other with respect to the outer circumference of the case 1, that is, in an oblique direction, and further, the elastic portion (the bending portion 1 can be deformed when vibration occurs).
Mounting plate 1 having 8a, 18a ', 18b, 18b')
8 and 18 'are provided, and the tip portion 1 of this mounting plate 18 and 18'
8c and 18c 'are holding parts 11c and 11 of the main body device 11.
Since the flat type vibration motor 10 is arranged on the main body device 11 by being inserted into c ′, the mounting strength is changed with the passage of time and the environment as in the case of using the double-sided tape or the like. It is possible to maintain a constant mounting strength without any change and to prevent the flat vibration motor 10 from coming off the main body device 11. Also,
When mounting the flat vibration motor 10, the mounting plate 1
Since the mounting is completed by inserting the tip portions 18c and 18c 'into the gaps A and B of the holding portions 11c and 11c' while bending the bending portions 8 and 18 ', a fixing member such as a screw becomes unnecessary. Therefore, it is possible to keep the assembly cost low. Further, since the mounting plates 16 and 16 'are provided with the curved portions 18a, 18a', 18b, and 18b 'that are elastic portions, the vibrations generated in the radial direction due to the deformation of the elastic portions are generated in the thrust direction. It can be changed, and the notification effect by sufficient vibration can be obtained.

In each of the above-described embodiments, the elastic portion is formed by forming the curved portion on the attachment plate attached to the case 1 or the bottom plate 2 of the flat vibration motor 10. It is not limited to this.
As shown in FIG. 5, the notches 19a and 19b, the notches 19a ′, and the notches 19b ′ from both sides in the lateral direction of the mounting plate 19.
To form the cutouts 19a, 19b, 19a ′, 19
The elastic portions 19c and 19c ′ may be portions having a width narrower than other portions caused by b ′. Such an elastic part 1
The mounting plate 19 having 9c and 19c 'can also efficiently change the radial vibration of the flat vibration motor 10 into the thrust vibration, and can obtain the notification effect by sufficient vibration. Further, the notches 19a, 19b, 1
There is also an advantage that the amount of vibration can be adjusted by the notch amount of 9a 'and 19b'. In addition, the flat type vibration motor 10
The notches may be point-symmetrical with respect to the center of rotation, for example, only the notches 19a and 19b ′ in FIG. 5 may be formed. With this configuration, when the flat vibration motor 10 rotates and vibration occurs in the radial direction, the mounting plate 19 vibrates in a twisted manner at the cutouts 19a and 19b '.
Vibration in the thrust direction can be obtained.

Further, the flat type vibration motor 10 as described above is used.
When the mounting plate 19 extending in the radial direction from the case 1 or the bottom plate 2 is provided, the following mounting method for the main body device 11 is also possible. As shown in FIGS. 6A and 6B, the flat vibration motor 10 is attached to the main body device 11. The flat type vibration motor 10 in this case has the same configuration as that shown in FIG. 5, and the cutout portions 19 a, 19 b, 1 are formed in the attachment plate 19 attached to the case 1 or the bottom plate 2.
Elastic portions 19c, 19 generated by 9a ', 19b'
have c '. A place where the flat vibration motor 10 having the mounting plate 19 as described above is mounted on the main body device 11 is a recess 11g. Eave-shaped holding portions 11f and 11f 'are formed at the edges of the concave portion 11g and at positions facing each other. Holding parts 11f, 1
Each tip of 1f 'is cut out in a partial circular shape,
By facing each other in this partial circular shape,
It forms a circle slightly larger than Case 1. Further, the longitudinal side surface portion of the concave portion 11g is not closed and communicates with the external space.

When the flat type vibration motor 10 is attached to the main body device 11 having the above-described structure, first, as shown in FIG. 6A, the case 1 is held between the holding portions 11f and 11f '. And the mounting plate 19 is arranged so as to be in a direction orthogonal to the longitudinal direction of the main body device 11 as shown by the chain double-dashed line. Next, the flat vibration motor 10 is lowered, and the flat vibration motor 10 is arranged in the recess 11g. The dimensions of the tip of the holding portion 11f and the tip of the holding portion 11f 'are set in advance so as to be slightly larger than the width dimension of the mounting plate 19 in the lateral direction.
The tip of f and the tip of the extending portion 11f ′ are flat type vibration motor 1
There is no obstacle to the installation of 0. Next, the flat type vibration motor 10 is rotated by 90 ° to attach the mounting plate 19 to the holding portion 11
Arrange them so that they are below the f and 11f '. After that, the attachment of the flat vibration motor 10 to the main body device 11 is completed by applying an appropriate retaining means.

By making the main body device 11 side to which the flat type vibration motor 10 is attached configured as described above, it becomes possible to attach the flat type vibration motor 10 with one touch, which contributes to a reduction in manufacturing cost. You can

[0032]

According to the present invention, the case or the bottom plate is provided with a mounting plate having an elastic portion that can be deformed when vibration occurs,
Since the end of the mounting plate is held by the main unit, a sufficient amount of vibration can be obtained by the elastic part when vibration occurs, and the radial vibration generated by the flat vibration motor can be efficiently changed to the thrust direction. As a result, a sufficient notification effect due to vibration can be obtained. In addition, since the mounting strength of the flat vibration motor does not change with the passage of time or changes in the environment, it is possible to maintain a constant mounting strength at all times, which prevents the flat vibration motor from coming off. it can. The elastic portion of the mounting plate that can be deformed when vibration occurs may be a notch or a curved portion, and the direction in which the mounting plate is extended and formed may be the radial direction of the flat vibration motor or the thrust. It may be in the direction. In any case, when the vibration is generated, the elastic portion can obtain a sufficient amount of vibration, and the radial vibration generated by the flat vibration motor can be efficiently changed to the thrust direction.

Further, the main body device is provided with a holding portion for holding the mounting plate with a minute gap, and the elastic portion of the mounting plate of the flat type vibration motor is flexibly inserted into the main body device. If a flat type vibration motor is attached, fixing parts such as screws are unnecessary, and moreover,
Since it can be assembled with one touch, it is possible to contribute to a reduction in manufacturing cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a mounting structure for a flat vibration motor according to the present invention.

FIG. 2 is a plan view showing an embodiment of the above flat type vibration motor.

FIG. 3 is a sectional view showing another embodiment of a mounting structure for a flat vibration motor according to the present invention.

FIG. 4 is a cross-sectional view showing still another embodiment of a mounting structure for a flat vibration motor according to the present invention.

FIG. 5 is a plan view showing still another embodiment of a mounting structure for a flat vibration motor according to the present invention.

FIG. 6 shows still another embodiment of a mounting structure for a flat vibration motor according to the present invention, (a) is a plan view,
(B) is a side view.

FIG. 7 is a sectional view showing an example of a conventional flat vibration motor.

FIG. 8 is a sectional view showing an example of a conventional flat vibration motor mounting structure.

[Explanation of symbols]

 1 case 2 bottom plate 3 coil 4 eccentric rotor 5 driving magnet 6 mounting plate 6a elastic part

Claims (3)

[Claims] 1. A flat cup-shaped case, a bottom plate covering an opening of the case, an eccentric rotor having a coil housed in a space formed by the case and the bottom plate, and a drive magnet arranged to face the coil. A mounting structure for a flat vibration motor, wherein the flat vibration motor is mounted on a main body device, wherein the flat vibration motor generates vibration due to rotation of the eccentric rotor. A mounting structure for a flat type vibration motor, characterized in that a mounting plate having: is provided, and an end portion of the mounting plate is held by the main body device. 2. The mounting plate is formed so as to extend in the radial direction from the outer periphery of the case, and a cutout portion or a curved portion is formed at the extended portion. The mounting structure of the flat vibration motor according to 1. 3. The mounting plate is formed so as to extend in the thrust direction from the outer circumference of the case, and a cutout portion or a curved portion is formed at the extended portion. The mounting structure of the flat vibration motor according to 1.