JP3406638B2 - Flat type vibration generator - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

The present invention provides a human body or the like with a calling device such as a pager for transmitting a call by vibration in a small radio, a signal receiver for the blind, a device for transmitting a predetermined signal, and a light vibrator. This is a flat type vibration generator of button battery type suitable for a massaging device requiring a massaging effect or light vibration.

[0003]

2. Description of the Related Art A card type pager, a wristwatch type pager and the like have a built-in vibration generator having an eccentric metal weight attached to the rotary shaft of a conventional cylindrical coreless motor because its thickness is very thin. Since there is no space for this, it is necessary to use a flat vibration generator that can be formed flat.

Therefore, the inventors of the present application previously provided a flat vibration generator 1'as shown in FIG. Below, this flat type vibration generator 1'is demonstrated with reference to FIG. It should be noted that the description of the portions common to the present invention will be made in the portions of the embodiments of the present invention, and the same reference numerals will be given to the same parts and corresponding parts will be denoted with a dash. In FIG. 6, 7 is a rotary shaft, 9'is a case, 10 'is a bracket, 13'-
1, 13'-2 is a brush, 18'-1, 18'-2 is a lead wire, 11 'is a flat type vibration generator main body, and 2, 8 are bearings.

This flat type vibration generator 1'has a well-known 4
It is opposed to the field pole 15 of the three-phase flat coreless armature 5 in the axial air gap type electric motor of the three-phase three-coil uniform arrangement which is opposed to the field pole 15 having a flat pole via the air gap in the axial direction. For the purpose of increasing the amount of eccentric vibration, a fan plate-shaped eccentric metal weight 26 'made of high ratio heavy metal such as lead or tungsten is fixed to the axial surface opposite to the surface using an adhesive material. There is.

The eccentric metal weight 26 'is larger than the shape of each armature coil 3-1, ..., 3-3 for the purpose of increasing the amount of eccentric vibration.

[0007]

2. Description of the Related Art According to the above flat vibration generator 1 ', larger vibration can be obtained than that of the flat vibration generator using the flat coreless eccentric vibration armature 6''shown in FIG. It was This flat coreless eccentric vibration armature 6 ''
Is the one in which the eccentric metal weight 26 '' is put in the hollow portion in the frame of one armature coil 3-1.

One characteristic of the flat-type vibration generator using the flat-type coreless eccentric vibration armature 6 '' is that a 70-turn winding is conducted with a conductor wire having a diameter of Φ0.1 and a thickness of 0.6 mm. When using the armature coils 3-1, ..., 3-3 formed in No. 3, the current value was as low as 70 mA, but when the vibration was expressed by acceleration, it was 0.06 G. However, eccentric metal weight 26 "
Was formed of lead.

Since the eccentric metal weight 26 '' is inserted into the small frame hollow portion of the armature coil 3-1, the small eccentric metal weight 2 is inserted.
Since only 6 ″ can be used, the flat type vibration generator 1 ′ of FIG. 6 was devised to obtain a larger vibration. In the case of this flat type vibration generator 1 ', since a large eccentric metal weight 26' can be used, a large vibration is obtained as compared with the case of using the flat type coreless eccentric vibration armature 6 ''.

Even so, the vibration was around 0.08 G, which was not sufficient yet. Therefore, an eccentric oscillating weight formed in a semicircle shape was bonded to the surface of the three-phase flat coreless armature 5 for the purpose of obtaining a larger vibration. However, since the flat vibration generator is a very small object having a diameter of 20 mm and a thickness of 3 mm, the eccentric vibration weight becomes large and the load becomes too large, so that a large vibration cannot be obtained. Also, it is not a good idea in terms of current value.

[0011]

DISCLOSURE OF THE INVENTION The present invention is based on the above-mentioned problems, and by comparing the shape and position of the flat metal weight so as not to make the eccentric metal weight too large, the present invention can be compared with conventional ones. It is an object to obtain a flat vibration generator suitable for card type or wrist watch type pagers, etc.

[0012]

The object of the present invention is to provide 2P (P is an integer of 1 or more) magnetic poles of N pole and S pole so that adjacent magnetic poles have different poles. An air-core type that is provided with a field pole as a stator and a brush, and is configured to face the field pole through an axial gap and rotate to generate vibration due to centrifugal force. A flat coreless armature comprising a group of armature coils and an axial gap type flat vibration generator which is a rotor provided with a commutator electrically connected to the armature. Flat coreless coreless armature that is located outside one-half or more of the radius and has an eccentric metal weight for eccentrically generating the vibration on a part of the surface in the axial direction of the flat coreless armature. Achieved by forming an eccentric vibration armature That.

Another object is achieved by arranging the eccentric metal weight so that either one of a starting end and a terminating end extending in the circumferential direction faces a conductor portion position that contributes to the torque generated by the armature coil. it can. Mounted flat type vibration generator.

Another object can be achieved by forming the eccentric metal weight so that the width extending from the start end to the end extending in the circumferential direction is slightly wider than the circumferential width of the armature coil.

Another object is to provide the flat vibration generator described above,
A flat coreless eccentric vibration armature formed by arranging three air-core armature coils in three phases at equal pitches so that they do not overlap each other by using four poles as field poles The commutator is composed of six commutator pieces, and the brush electrically slid on the commutator pieces is a positive power source terminal side and a negative side. This can be achieved by arranging and forming a pair of brushes electrically connected to the power supply terminal side at an open angle of the width of one magnetic pole of the field pole.

[0016]

When the armature coil group is energized so that a torque in a predetermined direction is generated through the commutator that slides with the brush electrically connected to the positive and negative power supply sides, the flat coreless eccentric vibration armature is generated. Rotate in a predetermined direction. Here, one of the axial surfaces of the flat coreless armature located at an eccentric position on the axial surface of the three-phase flat coreless armature and outside the radius of the flat coreless armature by one half or more. The flat coreless eccentric vibration armature is eccentrically rotated while eccentric to the flat coreless armature because the eccentric metal weight is attached to the part to generate vibration. To do. Since the centrifugal force due to the radial and circumferential eccentricity due to the eccentric rotation of this flat coreless eccentric vibration armature becomes vibration and propagates to the flat vibration generator main body, a device to which the flat vibration generator is attached, For example, vibration can be transmitted to the pager body, and the pager wearer can be informed that there is a call due to vibration.

[0017]

Examples of the invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment FIG. 1 shows that four field poles are used and three air-core type armature coils 3-1, ..., 3-
Eccentric metal on the axial surface of the three-phase flat coreless armature 5 molded in a disk shape with resin 4 so as to be arranged in three phases at equal pitches of 120 degrees so as not to overlap each other. A flat coreless eccentric vibration armature 6-1 formed by fixing weights 26 with an adhesive material is axially flat in the axial direction with the field poles 15 facing each other through a gap in the axial direction. 2 is an exploded perspective view of the flat type vibration generator 1, and FIG. 2 is a vertical sectional view of the flat type vibration generator 1. The flat type vibration generator 1 has an end face in the axial direction, such as a rotary shaft or a fixed shaft. The shaft does not protrude so that the shaft does not protrude. The flat vibration generator 1 of this embodiment will be described below mainly with reference to FIGS. 1 and 2.

Axial thickness is 3 mm, diameter is 20 mm
The flat type vibration generator main body is formed by closing the open end (the lower open end in the drawing) of the flat cup-shaped case 9 made of the magnetic material with the disk-shaped bracket 10 made of the magnetic material. 11 is formed. The case 9 and the bracket 10 also serve as a stator yoke. The bracket 10 is formed by using an iron substrate. On the upper surface of the bracket 10, two power supply conductive patterns 1 for electrically connecting to the positive power supply terminal 14-1 side and the negative power supply terminal 14-2 side, respectively.
2-1 and 12-2 are substantially semi-circular brushes 13-1 and 13
-2 is integrally formed by means such as etching, and the brushes 13-1, 13-2 electrically slid with the commutator pieces 28-1, ..., 28-6 are positive. Side power terminal side 1
4-1 and the negative power source terminal 14-2 are electrically connected. The two brushes 13-1 and 13-2 are approximately 2P / k
(However, k is the number of magnetic poles of the field pole 15). In this embodiment, two brushes 13-1 and 13
-2 is arranged and formed with an open angle width of approximately one magnetic pole width (mechanical angle of 90 degrees, electrical angle of 180 degrees) of the field pole 15 to be described later, and an appropriate portion of its surface is treated with an insulating thin film. .

The side surface of the case 9 is cut away to form the through hole 16.
And the outer circumference of the bracket 10 facing the through hole 16 is extended outward in the radial direction to form a lead wire mounting piece 17 for power supply. The positive side power supply terminal 14 is connected to the conductive patterns 12-1 and 12-2 extended from the mounting piece 17.
The lead wire 18-1 for connecting to the -1 side and the lead wire 18-2 for connecting to the negative power supply terminal 14-2 side are electrically connected by the solder 19.

A through hole 21 for press-fitting and fixing the lower end of the fixed shaft 20 with a collar is formed in the central portion of the bracket 10, and the fixed shaft is fixed until the flange 22 abuts the bracket 9 in the through hole 21. 20 is press-fitted and fixed in the through hole 21, and the fixed shaft
The upper end of 0 is brought into sliding contact with the center of the inner surface of the case 9 via a slider 23.

A flat coreless eccentric vibration armature 6-1 is rotatably supported on the fixed shaft 20 as described later.

A cylindrical bearing 24 made of oilless metal or the like is rotatably mounted on the outer periphery of the fixed shaft 20, and a non-magnetic metal cylindrical spacer 25 is provided on the outer periphery of the bearing 24. The flat commutator substrate 27 is fixed with a resin 4 mold and three planar fan-frame-shaped coreless armature coils 3 are provided.
A flat coreless eccentric vibration armature 6-1 in which a three-phase flat coreless armature 5 having -1, ..., 3-3 and a substrate 27 are integrated is rotatably supported.

The flat coreless eccentric vibration armature 6-1.
And a magnetic field pole 15 in the form of a flat plate having magnetized N and S poles alternately along the circumferential direction so that adjacent magnetic poles have different polarities through a gap in the axial direction. It is fixed to the upper surface of the bracket 10 in a concentric arrangement with the adhesive 20 by an adhesive.

The three-phase flat coreless armature 5 has three air-core armature coils 3-1, ..., 3 as shown in FIG.
-3 is arranged and arranged in three phases at equal pitches of 120 degrees so as not to overlap each other.
It is formed in a disc shape so as to have a through hole through which 0 passes. Although not shown in FIG. 3, the bearing 24 and the spacer 25 are mounted and integrated as described above on the inner peripheral portion of the central through hole.

The armature coils 3-1, ..., 3-3 are
The effective conductor portions 3a and 3a 'in the radial direction contribute to the generated torque, and the conductor portions 3b and 3c in the circumferential direction do not contribute to the generated torque. Also, each armature coil 3-1, ...
, 3-3 form the open angle between the effective conductor portions 3a and 3a 'in order to form an efficient flat vibration generator 6-1.
The field pole 15 (having four poles) is formed in a fan frame shape having a width equal to that of one magnetic pole, that is, a mechanical angle of 90 degrees.

An eccentric metal weight 26, which will be described later in detail, is fixed to the surface of the above-mentioned three-phase flat coreless armature 5 opposite to the surface facing the field poles 15 by an adhesive so that the flat The coreless eccentric vibration armature 6-1 is formed.

A commutator substrate 27 is fixed to the lower surface of the flat coreless eccentric vibration armature 6-1 concentrically with the fixed shaft 20. The commutator board 27 includes a commutator piece 28-1, ..., 28-6 group that comes into sliding contact with the brushes 13-1, 13-2 on the lower surface of an insulating board such as a printed board. It is formed in.

As shown in FIG. 4, commutator pieces 28-1 and 28
-4, commutator piece 28-2 and 28-5, commutator piece 28-3
And 28-6 are electrically connected to each other, and armature coils 3-1 ,.
.., electrically connecting the other terminals of 3-3 electrically in common,
Connect one terminal of the armature coil 3-1 to the commutator piece 28-1.
Then, connect one terminal of the armature coil 3-2 to the commutator piece 28-
3, one terminal of the armature coil 3-3 is connected to the commutator piece 28.
-2 is electrically connected by means such as soldering.

The flat-type vibration generator 1 capable of obtaining a large vibration is simply provided with an eccentric metal weight by using an adhesive or the like on the surface opposite to the surface facing the field poles 15 of the flat coreless armature 5. It cannot be done only by forming a fixed flat coreless eccentric vibration armature. The shape and location of the eccentric metal weight are important points.

In order to obtain a large vibration in the flat type vibration generator 1 of the present invention, referring to FIG. 2 and FIG. 3, when the radius length of the flat type coreless armature 5 is 1, the flat type Half the radius of the coreless armature 5, ie, 1/2
The flat coreless armature 5 is eccentrically located on an eccentric part of the axial surface (the surface opposite to the surface facing the field pole 15) of the flat coreless armature 5 located on the outer side to cause vibration. An eccentric metal weight 26 for generating is fixedly provided to form a flat coreless eccentric vibration armature 6-1.

Desirably, the armature coils 3-1, ...
.., 3-3, where the radial length is l ', the armature coils 3-1, ..., 3-3 are half the radius l' / 2 or more outward. Flat type coreless armature 5 located
An eccentric metal weight 26 for causing the flat coreless armature 5 to eccentrically generate vibration at a part of the eccentric position of the surface in the axial direction (the surface opposite to the surface facing the field pole 15). Since it is desirable that the flat coreless eccentric vibration armature 6-1 is fixed, such a position is selected to form the flat coreless eccentric vibration armature 6-1.

The large vibration can be obtained by disposing at such a position because the centrifugal force contributes to the outer peripheral portion of the flat coreless eccentric vibration armature 6-1. In this case, it is conceivable to provide an eccentric metal weight on the outer peripheral portion of the flat coreless armature 5, but the flat coreless armature 5 has a very large axial thickness and the amount of the eccentric metal weight is small, resulting in a large vibration. Therefore, it is desirable to dispose the eccentric metal weight 26 at the above-mentioned position. Further, when the eccentric metal weight 26 is arranged at the above-mentioned position, the amount of the eccentric metal weight is smaller than that of the conventional flat type coreless eccentric vibration armature 6 '. The load is small and the current characteristics are improved. In the case of the eccentric metal weight 26 'of the flat coreless eccentric vibration armature 6', the eccentric metal weight 26 'extends to the entire inner peripheral portion of the flat coreless armature 5 and does not contribute to centrifugal force. There are many parts, and conversely, the shape is such that centrifugal force is canceled out, and not only large vibration cannot be obtained, but also the load is large and the current characteristics are not good.

In addition to the above arrangement conditions of the eccentric metal weight 26, in order to obtain a larger vibration, the eccentric metal weight 26 has a starting end (in the direction of arrow A shown in FIG. Either the end portion) 26A or the end portion (end portion in the direction of arrow A shown in FIG. 3) 26B is the armature coil 3-1.
Flat coreless armature 5 so as to face the position of the conductor portion 3a or 3a 'that contributes to the torque generated by 3-2 or 3-3.
It is arranged at the above-mentioned position on the surface.

In the embodiment, the eccentric metal weight 26 has the starting end 26A extending in the circumferential direction facing the starting position in the circumferential direction of the conductor portion 3a which contributes to the torque generated by the armature coil 3-1. . End 26B of eccentric metal weight 26
Is formed so as to extend to a position between the conductor portion 3a ′ that contributes to the torque generated by the armature coil 3-1 and the conductor portion 3a that contributes to the torque generated by the armature coil 3-2.

The eccentric metal weight 26 has both a starting end (an end portion in the direction of arrow A shown in FIG. 3) 26A and an end (end portion in the direction of arrow A shown in FIG. 3) 26B extending in the circumferential direction. The conductor portions 3a and 3a ′ contributing to the generated torque of the child coil 3-1 (or the conductor portion 3a contributing to the generated torque of the armature coil 3-2) may be opposed to each other, but in the present invention,
This is not done for the purpose of obtaining large eccentric vibration as shown below.

That is, in the present invention, the eccentric metal weight 2
6 is formed so that the width from the starting end 26A to the terminating end 26B extending in the circumferential direction is a little wider than the width of one armature coil, for example, the outside in the circumferential direction of 3-1. , The eccentric metal weight 26 is fixed to the surface of the flat coreless armature 5 so that the terminal end 26B is located, and the flat coreless eccentric vibration armature 6-1 is formed to obtain a new eccentric motive force by a large centrifugal force. I have to.

The reason for doing so will be described below.

The conductor portions 3a and 3a 'of the armature coil 3-1.
Is the conductor that contributes to the generated torque. Therefore, the eccentric metal weight 2 is placed at a position facing the conductor portion 3a or 3a '.
If the start end 26A or the end end 26B of 6 is arranged to face each other, the maximum starting torque is generated at this position, so that the heavy eccentric metal weight 26 that becomes a load is fixed to the flat coreless armature 5 surface. Since the flat coreless eccentric vibration armature 6-1 can be rotated without a heavy load, a large vibration due to the eccentric centrifugal force can be obtained.

Next, as described above, the end 26B of the eccentric metal weight 26 is positioned so as to face the conductor 3a which contributes to the torque generated by the armature coil 3-1.
Is the conductor portion 3 that contributes to the torque generated by the armature coil 3-1.
An eccentric metal weight 26 is fixed to the surface of the flat coreless armature 5 so as to face a portion that does not contribute to the generated torque between a'and the conductor portion 3a that contributes to the generated torque of the armature coil 3-2. The starting point 26A of the eccentric metal weight 26 is
This is to provide a larger eccentric vibration force by providing a difference in magnitude between the position and the terminal end 26B due to the generated centrifugal force.

A flat vibration generator 1 according to one embodiment of the present invention
According to the above, a power source such as a battery of a pager incorporating the power source terminal 14-1, 14-2, brushes 13-1, 13-
2, three armature coils 3-1 through the commutator 28, etc.
If the current is supplied to 3-3 as shown in FIG. 4 so that a rotational torque in an appropriate direction can be obtained, a torque that rotates in a predetermined direction is generated according to Fleming's left-hand rule.
The flat coreless eccentric vibration armature 6-1 rotates about the fixed shaft 20 in a predetermined direction.

When the flat coreless eccentric vibration armature 6-1 rotates in a predetermined direction, the brushes 13-1 and 13-2 and the commutator pieces 28-1 ,. ..The sliding position of 28-6 changes,
Continuous rotation torque in a predetermined direction is generated. Since the flat coreless eccentric vibration armature 6-1 is formed such that the center of gravity is eccentric, the flat coreless eccentric vibration armature 6-1 rotates eccentrically while performing partial circular movement. The radial and circumferential eccentricity due to the eccentric rotation of the armature 6-1 propagates as vibrations to the flat vibration generator main body 11, so that a device to which the flat vibration generator 1 is attached, for example, a pager. Vibration is transmitted to the main unit,
JA It is possible to inform the carrier that there is a call due to vibration.

According to the flat type vibration generator 1, as described above, a very thin and small type is obtained, and when the vibration amount is expressed by acceleration, about 0.1 G can be obtained. Larger vibration was obtained compared to the generator 1 '.

According to the flat vibration generator 1 of the present invention,
In consideration of the purpose of obtaining large vibration and the specification current consumption, the armature coils 3-1, ..., 3-3 can be individually wound with different numbers of winding turns, or the thickness can be changed. The eccentric vibration armature 6-1 may be formed.

[0044]

Second Embodiment of the Invention FIG. 6 is a plan view of a flat coreless eccentric vibration armature 6-2 showing another embodiment of the present invention. The flat coreless eccentric vibration armature 6-2 has an eccentric weight [center of gravity] at a portion where the eccentric metal weight 26 is fixed.
Is formed by removing the portion of the flat coreless armature 5 symmetrical to the above-mentioned eccentric metal weight 26 and the resin 4 in the vicinity thereof so as to be inclined.

[0045]

According to the present invention, unlike the one formed by disposing the armature coil in an eccentric position, a conventional three-phase flat coreless armature of an evenly arranged armature coil that is easy to manufacture is used. using a flat coreless eccentric vibratory armature that
Since it is a flat type vibration generator, it can be mass-produced easily and at low cost. Also, compared with this type of conventional one, by simply changing the shape and placement position of the eccentric metal weight, it is possible to obtain an extremely large amount of vibration compared to the conventional type, so the diameter is 20 mm.
In the following, even if the thickness is 30 mm or less, it is possible to obtain a flat-type vibration generator that is sufficiently effective in practical use.

[Brief description of drawings]

1 is an exploded perspective view of a flat vibration generator of one embodiment of the present invention. 2 is a vertical cross-sectional view of the flat vibration generator. 3 is an illustration of an eccentric metal weight. 4 is a development view of the field poles, flat coreless armature, commutator and brush. 5 is a top view of a flat coreless eccentric vibration armature showing another embodiment of the present invention. 6 is an exploded perspective view of a conventional flat vibration generator. 7 is a top perspective view of a flat coreless eccentric vibration armature showing another embodiment of the conventional.

[Explanation of symbols]

1, 1'flat type vibration generator, 2 bearings 3-1, ..., 3-3 coreless armature coils 3a, 3a ', 3'a, 3'a' effective conductor portion 3b contributing to generated torque, 3'b, 3c, 3'c Conductor part that does not contribute to generated torque 4 Resin 5 Three-phase flat type coreless armature 6-1, 6-2, 6 ', 6''Flat type coreless eccentric vibration armature 7 rotation Shaft 8 Solder 9,9 'Case 10, 10' Bracket 11, 11 'Flat type vibration generator main body 12-1, 12-2 Power supply conductive pattern 13-1, 13-2, 13'- 1, 13'-2 Brush 14-1 Positive power supply terminal 14-2 Negative power supply terminal 15 Field pole 16 Through hole 17 Power supply lead wire mounting pieces 18-1, 18-2, 18'- 1, 18'-2 Lead wire 19 Solder 20 Fixed shaft with collar 21 Through hole 22 Collar 23 Slider 24 Bearing 25 Cylindrical spacer 2 Eccentric metal weight 26A starting 26B end 27 flat commutator substrate 28 commutator 28-1, ..., 28-6 commutator segment

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-164254 (JP, A) JP-A-6-292344 (JP, A) JP-A-6-311693 (JP, A) Actual Kaihei 7- 44875 (JP, U) Actually opened 55-79660 (JP, U) Actually opened 63-88060 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 7/00-7 / 20 H02K 23/00-23/68 B06B 1/00-3/04 A61H 19/00-31/02 H04B 7/24-7/26 H04Q 7/00-7/38

Claims (3)

(57) [Claims] 1. N is so arranged that adjacent magnetic poles have different polarities.
It is equipped with a field magnet pole formed as 2P (P is an integer of 1 or more) magnetic poles and S poles as a stator and a brush, and is face-to-face with the field magnet pole via an axial gap. And a rotor provided with a commutator electrically connected to the flat coreless armature consisting of an air-core type armature coil group formed so as to generate vibration due to centrifugal force when rotated and a rotor. In the axial gap type flat vibration generator described above, the flat coreless electric machine is provided on a part of an axial surface of the flat coreless armature located outside one-half or more of the radius of the flat coreless armature. A flat coreless eccentric vibration armature is formed by fixing an eccentric metal weight to eccentrically generate vibrations, and the eccentric metal weight is extended according to the circumferential method.
The start or end of the armature coil
Check that it is facing the conductor position that contributes to the generated torque.
A characteristic flat type vibration generator. Wherein the eccentric metal weight is according to claim 1, characterized in that the circumferential width from the starting end extending to the method to the end is formed slightly wider than the width in the circumferential direction of the armature coils Flat type vibration generator. 3. The flat-type vibration generator uses four poles as field poles and is formed by arranging three air-core armature coils in three phases at equal pitches so as not to overlap each other. A flat coreless eccentric vibration armature is made to face the field poles with an air gap in the axial direction, and the commutator is composed of six commutator pieces and electrically slides on the commutator pieces. The brush is formed by arranging a pair of brushes electrically connected to the positive power supply terminal side and the negative power supply terminal side at an open angle of the width of one magnetic pole of the field pole. Claim to be
The flat vibration generator according to 1 or 2 .