JPS63290140A - Oscillatory type axial air-gap type motor - Google Patents

Abstract

PURPOSE:To form a small and low-priced oscillatory type axial air-gap type motor by eliminating at least one coil of a coreless flat armature. CONSTITUTION:Motor casings 6, 7 serving also as stator yokes are fitted with bearings 8, 9, by which the rotating shaft 2' of a coreless flat armature 21 constituting a rotor is supported. Said coreless flat armature 21 lacks one of three armatures which it usually has, two air-core type armature coils 12-1 and 12-2 are arranged at a pitch of 120 deg. in said armature 21, and their outer peripheral parts are molded into an integral body by plastics so that said armature is formed into a discoidal shape. When a motor formed in this manner is rotated, the coreless flat armature 21 is eccentric and oscillates while revolving. Therefore, an oscillatory sound can be generated and a thickness can be thinned, even if any particular revolving plate is not provided.

Description

[Detailed Description of the Invention] [Industrial Application Field of the Invention] The present invention is a signal receiver for blind people, which has the purpose of transmitting a predetermined signal, and can apply a light vibrator to the human body, etc., and has a pine surge effect or a light It is built into a pine surge device that requires vibration, or a pager, etc., and when it is driven, it gives vibration to the pager, etc., and by giving the vibration to the human body, etc., it can be detected that the pager, etc. is operating. Vibration-type axial gap type (DC) that can generate vibrations, such as devices that can be used for notification purposes, etc.
Regarding electric motors, especially the armature coil has two phases.

[Prior art and its problems] Various devices are known for the purpose of transmitting vibrations to the human body, such as pine surge machines and signal receivers for blind people.

Although the vibrating axial gap type electric motor of the present invention is useful for use in the above-mentioned apparatus, for example, in the case of a bokketo bell, the conventional one has the following drawbacks.

In today's information society, pagers are frequently used by businessmen, and the number of units sold is increasing.

Here, pagers emit loud noises no matter where they are, and the noise may disturb people around them, or it may have a negative impact on the mental health of the person who owns the pager. It has been reached.

Under these circumstances, attempts have recently been made to make it possible to notify the pager of a telephone call by causing the pager to vibrate instead of making a sound.

Although various methods can be considered as means for causing a pager to vibrate, an inexpensive small direct current motor is considered to be a promising method for imparting vibration to a small pager. In particular, DC motors are inexpensive, compact, yet highly efficient, and suitable for high-speed rotation.

Here, as a conventional axial gap type electric motor 4 used in a pager 5, etc., 1 is shown, for example, in FIGS. 14 and 15.
As shown in the figure, a rotating shaft 2 of a flat axial gap type electric motor 1
It has a structure in which a rotating plate 3 is attached to the swivel plate 3.

In this way, a rotating plate 3 is attached to the rotating shaft 2 of the axial gap type electric motor 1.
A vibrating axial gap type electric motor 4 configured by attaching the same is built into the pager 5, and when the pager 5 is driven, the pager 5 vibrates.

FIG. 16 is a longitudinal cross-sectional view of the axial gap type electric motor 1 used in the vibration type axial gap type electric motor 4 which is flat in the axial direction.
is a motor casing made of magnetic material, and the motor casing 6.7 also serves as a stator yoke.

A bearing 8.9 is mounted at the center of the motor casing 6.7, and the rotating shaft 2 of a coreless flat armature 10 constituting a rotor is rotatably supported by the bearings 8, 9.

The coreless flat armature 10 has two, for example, three air-core armature coils 12-1, 12- as shown in FIG.
2.12-3 are integrally formed into a disk shape by molding the outer periphery with plastic 23 so as not to overlap each other at equal intervals of 120 degrees.

Armature coil 12-1. ..., 12-3 is.

The effective conductor portions 12a and 12a' in the radial direction contribute to the generated torque, and the conductor portions 12b and 12C in the circumferential direction do not contribute to the generated torque.

Moreover, each armature coil 12-1. . . , 12-3 is the effective conductor portion 1 in order to form the electric motor 1 with good efficiency.
The opening angle between 2a and 12a' is formed into a fan frame shape with a width equal to the width of the -magnetic pole of the field magnet 14 (having 4 poles) shown in FIG. 19 later on, that is, 90 degrees. are doing.

On the lower surface of the coreless flat armature 10 are nine commutator pieces 11-1 concentrically with the rotating shaft 2. . . , a commutator 11 consisting of 11-6 groups is provided. The commutator 11 will be described later.

As shown in FIG. 18, a printed distribution board 13 is disposed concentrically with the commutator 11 on the lower surface of the coreless flat armature 10, and is connected to the armature coils 12-1°..., 12-3 for commutation. The terminals 11 are electrically connected via a printed circuit board 13 as shown in FIGS. 21 to 24. In the case of Fig. 21 and Fig. 22, the 23rd
In the case of FIG. 24 and FIG. 24, the connection is Δ.

As shown in FIG. 19, on the surface of the motor housing 7 facing the coreless flat armature 10 through the axial gap 37, there is a flat circle having N poles and S poles alternately at an opening angle of 90 degrees. An annular field magnet (field magnet) 14 is fixed.

Two brushes 16 and 17 supported by an annular brush holder 15 made of plastic are in sliding contact with the inner surface of the field magnet 14 at an opening angle of 90 degrees, as shown in FIG.

The coreless flat armature 10 is shown in FIGS. 17, 18, and 2.
As is clear from FIGS. 1 to 24, three armature coils 12-1. ..., 12-3 are arranged at a pitch of 120 degrees, and a four-pole flat annular field magnet 14 shown in FIG. 19 and an axial gap 37 as shown in FIG. They are facing each other through. The field magnet 14 is.

As is clear from Fig. 19, with an opening angle width of 90 degrees, the N pole,
The magnetic poles of the S pole are alternately magnetized into four poles.

FIG. 21 shows the coreless armature coil 12-1 in the case of Y-type connection with the field magnet 14. ..., 12
-3, and Figure 22 shows the three armature coils 1.
2-1. ..., 12-3 group and 6 commutator pieces 11
-1. . . , is a wiring diagram when the commutator 11 consisting of the 11-6 group is connected in a Y type, and FIG. 23 shows the coreless flat armature 1 when connected with the field magnet 14 in a delta connection
0 and FIG. 24 shows three armature coils 1.
2-1,..., 12-3 and six commutator pieces 11-1,
. . , shows a connection diagram when the commutator 11 consisting of 11-6 is connected in a Δ configuration.

With reference to FIGS. 21 and 22, armature coil 12-
1. . . . , 12-3 connects the terminals of each one of the effective conductor portions 12a to the commutator pieces 11-1.11-3.11.
-5 and the other terminals of 5 are connected in common, commutator pieces 11-1 and 11-4, 11-2 and 11-5 are connected to 1
1-3 and 11-6 are electrically connected.

Referring to FIG. 21, brushes 16 and 17 and armature coil 12-1. ..., 12-3 is the commutator piece 11-
1. . . , 11-6 are formed at equal intervals with a pitch of 60 degrees, so that the armature coils 12-1.・
..., the two brushes 16 and 17 are connected to 12-3 so that current can be passed in the forward and reverse directions by 180 electrical degrees.
are shifted by 180 electrical degrees (90 mechanical degrees) and brought into sliding contact.

The brushes 16 and 17 are connected to the positive power terminals 18 and 17 of a drive circuit (not shown), respectively. It is connected to the negative side power supply terminal 19.

23 and 24 show the Δ connection, and the armature coils 12-1. . . , the terminals of one of the effective conductor portions 12b of 12-3 are connected to the commutator pieces 11-1.11, respectively.
-3.11-5, and the other terminal is connected to commutator pieces 11-2.11-4.11-6, respectively.

Further, the other effective conductor portion 12b of the armature coil 12-1 and one effective conductor portion 12a of the armature coil 12-3 are electrically connected, and the one effective conductor portion 12a of the armature coil 12-2 and The other effective conductor portion 1 of the armature coil 12-3
2b, and one effective conductor portion 12a of the armature coil 12-1 and the other effective conductor portion 12b of the armature coil 12-2 are electrically connected.

Therefore, armature coil 12-1. . . . When the group 12-3 is energized, the commutator 11 rotates -1 while sliding in contact with the brushes 16 and 17. For example, in the states of FIGS. 21 and 23, the armature coil 12-2.12-3
A current in the direction of the arrow can be passed through the armature coil 12-1 in the direction of the arrow F, and a rotational torque of the magnitude of symbol f can be obtained.
．． ..., the coreless flat armature 10 consisting of the 12-3 group is rotated.

Therefore, if you are wearing a pager 5 having such a vibrating axial gap type electric motor 4.

The pager 5 vibrates, and from the vibration of the pager 5, it is possible to know that there is a telephone call.

The axial gap type electric motor 1 used in the pager 5 is certainly useful, but if you simply attach the rotating plate 3 and use it for the pager 5, it will be difficult to use it.
Since the rotating plate 3 must be attached to the rotating shaft 2, it is not suitable for mass production and has the drawback of making the pager 5 expensive.In addition, since the rotating plate 3 is provided, the electric motor 1 becomes longer in the axial direction. This poses an obstacle to further miniaturization and cost reduction of the pager 5.

[Problems to be solved by the invention] The present invention has been made in order to eliminate the drawbacks of the conventional art, and is a vibrating axial gap type electric motor suitable for vibrating pagers, etc., which is inexpensive and axially directionless, without attaching a rotating plate to the rotating shaft. This was done with the aim of making it thinner, smaller, and lighter.

[Means for achieving the object of the invention] The object of the invention is to provide a flat field magnet having a plurality of alternating N and S magnetic poles as a stator, and to face the field magnet through an axial gap. In an axial gap type motor equipped with a coreless flat armature having rotatably supported coreless armature coil groups at equal intervals, when the coreless flat armature rotates, the coreless flat armature becomes eccentric. This can also be achieved by providing a vibrating axial gap type electric motor in which one or more armature coils are removed from the coreless flat armature at a predetermined location so as to vibrate and rotate.

Other purposes will be made clear in the explanation below.

[First Embodiment of the Invention] A vibrating axial gap type electric motor as a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

Figure 1 shows a vibration type axial gap type electric motor 2 that is flat in the axial direction.
0, the same members as in FIG. 16 are designated by the same reference numerals, and their explanations will be omitted. FIG. 2 is an exploded perspective view of a vibrating axial gap electric motor 20 that embodies the one shown in FIG. The main difference between the vibrating axial gap type electric motor 4 shown in FIGS.
This is because the electric motor 20 having this structure does not require the rotation plate 3.

Since the rotating shaft 2° does not need to protrude above the motor 20, it is possible to form a vibrating axial gap type (DC) motor 20 that is shorter in the axial direction, and the armature coil 12-
3, there are differences in the appearance of the electric motor 20 in that the coreless flat armature 21, which will be described later, is lighter. Others will be explained in detail below.

In this electric motor 20, a coreless flat armature 21 is rotatably supported by bearings 8 and 9, but this coreless flat armature 21 is different from the coreless flat armature 10 described above mainly because the coreless flat armature Delete one piece of armature coil 12-3 of child 10 as it is, and create armature coil 1.
2-3 is now a through hole 22, and the rotating shaft 2' does not need to protrude above the motor 20, so its length is shorter than that of the rotating shaft 2. be.

Although the coreless flat armature 21 may be left as is, in the first embodiment of the present invention, the coreless flat armature 21 is made of a plastic material 2 having a light specific gravity.
Armature coils 12-1 and 1 molded by 3 etc.
2-2, an eccentric metal weight 2 made of a non-magnetic material 1 with heavy specific gravity, such as lead, titanium, tungsten, etc.
There are 4.

In addition, when disposing this eccentric metal weight 24 on the coreless flat armature 21, the armature coil 12-1.12-
2 is preferably integrated at the same time when molding the plastic 23 into a disk shape.Here, the plastic 23
It is preferable to select a material with a specific gravity lighter than that of the armature coil 12-1. Preferable results are obtained by using a metal 1 with a heavy specific gravity, such as tungsten.

In FIG. 2, reference numerals 25 and 26 indicate the positive power terminals 18 and 26, respectively. A lead wire connected to the negative power terminal 19 is shown.

According to the vibrating axial gap type electric motor 20 having the coreless flat armature 21 formed in this manner.

Since the armature coils 12-1 and 12-2 are made of steel, they function as eccentric weights, and since there is an eccentric metal weight 24, when the electric motor 20 is driven, the coreless flat armature 2
Since the motor 1 rotates eccentrically, it generates vibrations in both the axial direction and the rotational direction, which causes the pager 5 incorporating the electric motor 20 to vibrate.

In this electric motor 20, like the electric motor 1 described above, six commutator pieces 11-1. There is a commutator 11 consisting of ..., 11-6 and two brushes 16, 17, and the brush 16
．． The arrangement of the commutator 17 is the same as in the case of the electric motor 1, but the commutator 11 is electrically connected as shown in FIGS. 3 to 6.

3 and 4 show the case of Δ connection, one effective conductor portion 12a of the armature coil 12-1.12-2 is connected to the commutator piece 11-1.11-3, respectively, The other effective conductor portion 12b includes commutator pieces 11-2, 11-, respectively.
Connected to 4.

Commutator pieces 11-3 and 11-6, 11-4 and 11-1, and 11-5 and 11-2 are electrically connected.

In this way, in the case of Δ connection, armature coil 12-3
It is sufficient to use almost the same electrical connection method as the conventional one (in the case of Figs. 23 and 24) by simply omitting the . It is necessary to devise such a method.

The Y-type connection in that case will be explained below.

5 and 6 show the case of Y-type connection.

Commutator piece 11-1. . . . What is the correspondence between the commutator 11 consisting of the 11-6 group and the brushes 16 and 17?

Same as the above embodiment, but armature coil 12-1.1
2-2 is electrically connected as follows.

One effective conductor portion 1 of armature coil 12-1.12-2
2a are connected to commutator pieces 11-1 and 11-3, respectively. Further, the other effective conductor portions 12b of the armature coils 12-1 and 12-2 are commonly connected to each other.

Commutator pieces 11-1 and 11-4, 11-2 and 11-5, and 11-3 and 11-6 are electrically connected.

The connection point between the other effective conductor portions 12b of the armature coils 11-1 and 11-2 is connected to the commutator piece 11-2 for short-circuiting.

This electrical short circuit is caused by the above Δ
This is different from the case of wiring.

This is because if this short circuit does not occur, there will be a point in the Y-type connection where one rotation torque will not be generated, and smooth rotation will not be possible.

[Second Embodiment of the Present Invention] FIG. 7 shows that in the case of FIG.
An exploded perspective view of a vibrating axial gap type electric motor 30 having a coreless flat armature 29 in which eccentric metal weights 27 and 28 similar to the eccentric metal weight 24 described above are embedded.

According to the electric motor 30 of this embodiment, since the armature 29 is provided with two weights 27 and 28, the coreless flat armature 21
It seems like you can get a bigger vibration than that, but in reality it doesn't.

The reason is that the armature coil 12-1, 12-2 also acts as an eccentric weight, but the armature coil 12-1
．． This is because the rotation balance between the weights 27 and 28 is maintained because the armature 12-2 is located over a range of 180 degrees or more between the two armatures.

Therefore, armature coil 12-1.12-2. Weight 24.2
7.28. There is a need to be more creative in the selection and placement of plastic materials 23 at the time of design.

In addition, as the plastic 23, for example, a single foam plastic, or a sea surface metal to be described later may be used. This also applies to other embodiments.

[Third Embodiment of the Invention] FIG. 8 shows a bottom perspective view of a third embodiment of the present invention. In the two coreless flat armatures shown in FIG. A coreless flat armature 31 is obtained by removing the eccentric metal weight 28 from the cavity.

According to this coreless flat armature 31, a result with better vibration efficiency than the coreless flat armature 21.29 is obtained.

[Fourth Embodiment of the Invention] FIG. 9 shows a coreless flat armature 32 according to a fourth embodiment of the invention.
2 shows a top perspective view, and FIG. 10 shows a bottom view #4 of the same armature, and this coreless flat armature 32 is different from the coreless flat armature 32 of FIG. -Remove it, and bury the removed part with rubber ≧- Las MEC 23.

[Fifth Embodiment of the Invention] FIG. 11 shows a top perspective view of a coreless flat armature 33 showing a fifth embodiment of the present invention, and FIG. 12 shows a bottom view of the same. In this case, the armature coil 1
2-1. Armature coil 12'-4, 12' made of lighter material such as aluminum than when forming 12-2.
-2 is used, and the whole is formed into a disk shape from a mixed resin 35 of heavy specific gravity metal powder and plastic powder, and it is convenient to manufacture even the part that has the conventional armature coil 12-3. Although it is buried from above, even if it is left as is, this buried part will be the armature coil 12°-1, 12
In order to make it heavier than '-2 and rotate eccentrically, by removing the part of the mixed resin 35 between armature coils 12°-1 and 12'-2 and other necessary parts. However, in the case of a vibrating axial gap type electric motor using this armature 33, the vibration efficiency is not very good.

[Sixth Embodiment of the Present Invention] FIG. 13 shows a top perspective view of a coreless flat armature 34 as a sixth embodiment of the present invention.

In this armature 34, the rotor is formed of foamed plastic or sea surface metal 36 instead of the plastic 23, and the armature coils 12-1, 12-2 are embedded and fixed therein.

The cavity within the frame of the armature 34 or the armature coil 1
The above object can be easily achieved by embedding an eccentric metal weight between 2-1 and 12-2 as in the above embodiment.

[Effects of the present invention] The present invention can effectively function for blind person signal transmission, vibrators, pagers, etc. by only slightly improving the conventionally known axial gap type electric motor, and moreover, Compared to the vibrating axial gap type electric motor used in pagers, this has the advantage of being thinner in the axial direction. Therefore, if adopted in the above device, there is an advantage that the device can be manufactured in a small size and at low cost.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of a vibrating axial gap type electric motor according to the first embodiment of the present invention, Fig. 2 is an exploded bottom perspective view of the same, and Figs. 3 and 4 are Δ-connection of armature coil groups. FIG. 5 and FIG. 6 are explanatory diagrams for the case where the armature coil group is connected in a Y-shape. FIG. 7 is a bottom exploded perspective view of the second embodiment, and FIG.
The figure is a top perspective view of a coreless flat armature showing the third embodiment, FIG. 9 is a top perspective view of a coreless flat armature showing a fourth embodiment, and FIG. 10 is a bottom view of the coreless flat armature. , FIG. 11 is a top perspective view of a coreless flat armature showing the fifth embodiment, FIG. 12 is a top perspective view of the same, and FIG.
A top perspective view of the coreless flat armature of the embodiment, FIG. 14 is an explanatory diagram of a pager using a conventional vibrating axial gap type motor, and FIG. 15 is a vibrating axial gap type electric motor using a rotating plate. FIG. 16 is a vertical sectional view of a coaxial air gap type electric motor, FIG. 17 is a top perspective view of a coreless flat armature of a coaxial air gap type electric motor, and FIG. 18 is a bottom view of the same coreless flat armature. , FIG. 19 is a plan view of a field magnet as an example used in a coaxial air-gap motor, FIG. 20 is an explanatory diagram of the relationship between a commutator and a brush, and FIGS. 21 and 22.
The figure is an explanatory diagram when the armature coil group and the commutator piece group are connected in a delta manner. FIGS. 23 and 24 are explanatory diagrams when the armature coil group and the commutator segment group are connected in a Y-shape. [Explanation of symbols] 1... Axial gap type electric motor, 2.2'... Rotating shaft, 3... Swivel plate, 4... Vibration type axial gap type electric motor, 5... Pager . 6.7...Motor casing, 8.9...Bearing, 1
0.10'...Coreless flat armature. 11... Commutator. 11-1. ..., 11-6... Commutator piece. 12-1. ..., 12-3, 12°-1°12'
-2... Armature coil, 12a, 12a゛... Effective conductor portion, 12b, 12C... Conductor portion that does not contribute to generated torque, 13... Printed distribution board, 14... Field magnet. 15...Brush holder, 16.17...Brush, 1
8...Positive side power supply terminal, 19...Negative side power supply terminal, 20
...Vibration type axial gap type electric motor. 21... Coreless flat armature, 23... Plastic, 24... Metal weight for eccentricity. 25.26... Lead wire, 27.28... Eccentric metal weight, two... Vibration type axial gap type electric motor, 30.
..., 34... Coreless flat armature, 35... Mixed resin, 36... Sea surface metal. 37...Void, 38...Connection point.

Claims (15)

[Claims] (1) A coreless electric machine equipped with a flat field magnet having a plurality of alternating N and S magnetic poles as a stator, which faces the field magnet through an axial gap and is rotatably supported. In an axial air-gap motor equipped with a coreless flat armature having child coil groups at equal intervals, when the coreless flat armature rotates, the coreless flat armature rotates eccentrically and vibrating. A vibrating axial gap type electric motor in which one or more armature coils at predetermined locations of a flat armature are removed. (2) A flat field magnet having four N and S magnetic poles alternately is provided as a stator, and three flat field magnets are rotatably supported and face to face with the field magnet through an axial gap. In an axial gap type motor equipped with a coreless flat armature having coreless armature coil groups at equal intervals, when the coreless flat armature rotates, the coreless flat armature rotates eccentrically and vibrates. According to claim (1), the coreless flat armature is configured by two armature coils by removing one coreless armature coil at a predetermined location of the coreless flat armature. Vibration type axial gap type electric motor. (3) The coreless flat armature is molded with plastic and formed into a disk shape, and a weight is provided at the position of the deleted coreless armature coil, as set forth in claim (2). Vibrating axial gap electric motor. (4) The above-mentioned coreless armature includes a commutator having 3n (n is an integer of 1 or more) commutator pieces, and a width m of one magnetic pole of a field magnet (m is an odd number of 1 or more). ) The vibrating shaft according to claim (2) or (3), comprising two positive power terminals provided at a double opening angle and a brush connected to the negative power terminal. Directional gap type electric motor. (5) The coreless flat armature has six commutator pieces, these six commutator pieces and the two armature coils are connected in a Y-shape, and the remaining armature coils are removed. The vibrating type axial direction according to claim (4), which is formed by short-circuiting the commutator piece to which the terminal of Air gap type electric motor. (6) Claim (1) wherein the deleted armature coil portion is formed by molding a coreless flat armature with plastic so that the deleted armature coil portion becomes a through hole. The vibrating axial gap type electric motor according to any one of items (5) to (5). (7) A weight is inserted into at least one armature coil of the plurality of armature coils, and the armature coils are integrated with plastic or the like to form a coreless flat armature.
A vibrating axial gap type electric motor according to any one of claims (1) to (6). (8) When there are two armature coils, a vibration type according to claim (7), wherein a weight is disposed in only one of the armature coils. Axial gap type electric motor. (9) When there are two armature coils, a weight is placed inside only one of the armature coils, and the weight is placed outside at least one of the armature coils. , a vibrating axial gap type electric motor according to claim (8). (10) When there are two armature coils, a weight is disposed between the armature coils and within one armature coil, as claimed in claim (8) or (9). ) vibrating axial gap type electric motor. (11) The weight is formed of a material heavier than the specific gravity of the armature coil, and the coreless armature coil group is formed into a disc shape using a material with a specific gravity lighter than the armature coil.
A vibrating axial gap type electric motor according to any one of claims (1) to (10). (12) The material with a light specific gravity is plastic,
A vibrating axial gap type electric motor according to claim (11), wherein the armature coil group is formed into a disk shape by molding the plastic. (13) The material with a light specific gravity is foamed plastic,
A vibrating axial gap electric motor according to claim 11, wherein the armature coil is held in a disk shape. (14) The vibrating axial gap type electric motor according to claim (11), wherein the material having a light specific gravity is a sea-surface metal, and the armature coil is held in a disk shape by this material. (15) When the coreless flat armature is integrated into a disk shape using a material with a higher specific gravity than the coreless armature coil, no weight is placed in the armature coil group, and the deleted armature A vibrating axial gap electric motor according to claim 13 or 14, wherein the coil portion is also filled with the material.