JPH08149747A - Flat vibration generator - Google Patents

Abstract

PURPOSE: To produce a large vibration by simply varying the number of turns of a coil by forming a three-phase flat coreless armature for eccentric vibration such that the central armature coil has a number of turns larger than those of other armature coils. CONSTITUTION: Since a central armature coil 3-2 constituting a flat coreless armature 6 for eccentric vibration has a larger number of turns than other armature coils 3-1, 3-3, it produces a higher torque and the weight thereof is heavier than other coils. Since the torque and centrifugal force can be increased in the direction of the center of gravity which contributes most to the vibration, a larger vibration can be obtained as compared with the case where the flat coreless armature 6 for eccentric vibration is rotated. Furthermore, since a commutator board 27 is secured to the lower surface part concentrically to a fixed shaft, a rotating torque is generated continuously in a predetermined direction to produce an eccentric rotation accompanied with a partial circular motion. This constitution can generate a large vibration by simply increasing the number of turns of one armature coil.

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a calling device such as a pager for transmitting a call by vibration in a small radio, a signal receiver for the hearing impaired, a device for transmitting a predetermined signal,
A mass vibrator that can give a light vibrator to the human body etc.
It is suitable for massaging devices that require a light effect or light vibration.

[0002]

2. Description of the Related Art A flat vibration generator having a high vibration efficiency for use in a pager or the like was previously disclosed by the present inventors in Japanese Patent Application No. 5-103513. One of the best of the several embodiments disclosed herein is a four pole field pole with N and S poles such that adjacent poles have different poles. It is provided as a stator, and the three air-core armature coils are circumferentially shifted in phase so as to have a three-phase arrangement, and the armature coil groups are substantially semi-disc-shaped when viewed in the axial direction in which they overlap each other. A three-phase flat coreless eccentric vibration armature formed in an eccentric shape is a rotor rotatably opposed to the field poles through an axial gap and eccentric.
A commutator composed of six commutator pieces is provided on the three-phase flat coreless eccentric vibration armature, and two brushes that are electrically connected to the positive power supply terminal side and the negative power supply terminal side are almost It is a flat-type vibration generator which slidably contacts the commutator with an opening angle width of one magnetic pole width.

[0003]

DISCLOSURE OF THE INVENTION For example, the flat type vibration generating device described above is
This flat-type vibration generator has a three-phase flat-type coreless eccentric vibration armature with an eccentric structure. Therefore, when the flat-type vibration generator is rotated, centrifugal vibration causes radial vibration. appear. That is, in the flat-type vibration generator, the rotary shaft or the fixed shaft has a right angle relationship with the casing of the pager. Therefore, when the rotor of the flat-type vibration generator rotates, centrifugal force of the pager causes the rotor to rotate. Vibration is generated in a direction parallel to the housing.

By the way, this flat vibration generator is often used in a card type pager.
The flat type vibration generator is inevitably configured to have a very thin thickness of 3 mm or less, since the thickness of the de-type pager is very thin such as 4 mm. The thinner the thickness is, the larger vibration cannot be obtained,
It is expected to obtain larger vibration.

An object of the present invention is to make it possible to obtain a large vibration by only changing the number of winding turns of three armature coils without making a large design change. It is in.

[0006]

The object of the present invention is as follows.
Japanese Patent Application No. 5-1035 proposed by the present inventors
As one of the good examples among the No. 13 examples, the magnetic poles of N pole and S pole are provided so that the adjacent magnetic poles are different poles.
The field poles of the poles are provided as a stator, and the three air-core armature coils are phase-shifted in the circumferential direction so as to have a three-phase arrangement, and the armature coil groups are doubly superimposed on each other in the axial direction. A three-phase flat coreless eccentric vibrating armature formed in an eccentric shape of a substantially semi-circular shape is a rotor that is face-opposed to the field poles through an axial gap and is eccentrically rotatable. , A commutator composed of six commutator pieces is provided in the three-phase flat type coreless eccentric vibration armature, and two brushes electrically connected to the positive power supply terminal side and the negative power supply terminal side are provided. In the flat type vibration generator in which the commutator is slidably contacted with an opening angle width of almost one magnetic pole width, the armature coil in the middle of the three-phase flat type coreless eccentric vibration armature is more than the other armature coils. You can get more torque by winding many turns with conductors. It can be achieved by forming a three-phase flat coreless eccentric vibratory armature with the winding.

[0007]

[Function] The brush 12 electrically connected to the positive and negative power supply sides
-1, 12-2 (brush portions 12b, 12b ') are arranged in the coreless armature coils 3-1, ..., 3-3 so that torque in a predetermined direction is generated via the commutator 28 that slides. By energizing, three-phase flat type coreless eccentric vibration armature 6
Eccentrically rotates while moving partially in a predetermined direction. Since the radial force due to the eccentric rotation of the eccentric vibration armature 6 and the centrifugal force due to the amount of eccentricity in the circumferential direction become vibrations and propagate to the flat vibration generator main body 11, a device to which the flat vibration generator 1 is attached, For example, vibration is transmitted to the pager body,
JA It is possible to inform the wearer that there is a vibration call.

In particular, the center armature coil 3-2 of the three-phase flat coreless eccentric vibration armature 6 has a larger number of turns than the other armature coils 3-1 and 3-3. Since a large centrifugal force in the direction of the center of gravity can be obtained because the coil is wound so that a larger torque can be obtained, the flat type coreless eccentric vibration armature 6 rotates and a larger force than the conventional one is obtained. Vibration is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

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, comb-shaped brush portions 12b, 12 are slidably contacted with a commutator which will be described later.
The power supply conductive parts 12a, 12a 'of the brushes 12-1, 12-2 having b'are soldered and fixed in a substantially annular shape by means of spots or the like, and the power supply conductive parts are provided as will be described later. The parts 12a and 12a 'are connected to the positive power supply terminals 14-
It is electrically connected to the 1 side and the negative side power supply terminal 14-2 side.
4 shows a vertical cross-sectional view of the brush portion 12b (or 12b ') taken along line XX' in FIG. Brush parts 12b and 12
The opening angle width with b'is set to π / 2, that is, the arrangement opening angle width of 90 degrees in mechanical angle as shown in FIG.

The conductive portion 12a is provided on a lead wire mounting piece 17 for power supply, which is formed by extending the outer peripheral portion of the bracket 10 facing the through hole 16 formed by cutting out the side surface portion of the case 9 in the radially outward direction. , 12a ', a power supply lead wire 18-1 for connecting to the positive power supply terminal 14-1 side, and a lead wire 18-2 for connecting to the negative power supply terminal 14-2 side. Are electrically connected by solder 19 (see FIG. 1).

The lower end of the collar-equipped fixed shaft 20 formed at the center of the bracket 10 is inserted into the through hole 21 for press-fitting and fixed, and the collar 22 is fixed until the collar 22 abuts the bracket 9.
Is press-fitted and fixed in the through hole 21, and the upper end of the fixed shaft 20 is slid on the center of the inner surface of the case 9 via the slider 23. A flat coreless eccentric vibration armature 6 is rotatably supported on the fixed shaft 20 as described later.

A cylindrical bearing 24 such as an oilless metal is rotatably mounted on the outer periphery of the fixed shaft 20.
A flat plate commutator substrate 27 is fixed by molding a cylindrical resin 26 through a cylindrical spacer 25 made of a non-magnetic metal on the outer periphery of the flat plate, and three planar fan-frame-shaped three-phase coreless cores are provided. A flat coreless eccentric vibration armature 6 formed by adhesively fixing the armature coils 3-1, ..., 3-3 to the substrate 27 is rotatably supported.

The magnetic poles adjacent to the flat coreless eccentric vibration armature 6 via the air gap in the axial direction have different polarities.
A flat plate annular four-pole field pole 15 having N and S poles magnetized alternately along the circumferential direction is fixed to the upper surface of the bracket 10 by an adhesive in a concentric arrangement with the fixed shaft 20.

The flat coreless eccentric vibration armature 6 has three air-core type armature coils 3-1, ..., 3 so that when the armature 6 rotates, the armature 6 eccentrically vibrates and rotates.
-3 groups are arranged so as to overlap each other in the circumferential direction so as to be doubly overlapped with each other to form an armature structure of an eccentric three-phase energization structure having a semi-disc shape when viewed from the axial direction (FIGS. 1, 6 and 7) reference).

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 hardly contribute to the generated torque. Also, each armature coil 3-1 and
.., 3-3, in order to form an efficient flat vibration generator 6, the open angle between the effective conductor portions 3a and 3a 'is
The width is equal to the width of one magnetic pole of the field pole 15, that is, a fan frame having a mechanical angle of 90 degrees.

In order to obtain a three-phase flat coreless eccentric vibration armature 6 which is thin and has good vibration efficiency, the armature coils 3-1 and 3-3 are circumferentially arranged so as not to overlap each other.
The armature coils 3-1 and 3 are arranged with a space of 0 degree.
-3, the armature coil 3-2 is superposed on the armature coil 3-2 so that the armature coils 3-2 arranged in the order of the armature coils 3-1, ... The eccentric shape is a semi-disc shape when viewed from the axial direction in which the elements 1 and 3-3 overlap each other.

The middle armature coil 3-2 forming the flat coreless eccentric vibration armature 6 has a larger number of turns than the other armature coils 3-1 and 3-3 in terms of conductors. Since the coil is wound so that a larger torque can be obtained, the weight becomes heavier. Therefore, the torque and centrifugal force in the direction of the center of gravity that most contributes to vibration can be greatly obtained,
When the flat coreless eccentric vibration armature 6 rotates, a larger vibration can be obtained as compared with the conventional case.

A commutator substrate 27 is fixed to the lower surface of the flat coreless eccentric vibration armature 6 concentrically with the fixed shaft 20. The commutator board 27 is an insulating board such as a printed board (conveniently configured by using a through-hole board) 29.
A commutator 28 composed of a group of commutator pieces 28-1, ..., 28-6 that is in sliding contact with the brush portions 12b and 12b ′ is formed on the lower surface of the substrate by etching means or the like (see FIGS. 5 and 7).

The commutator pieces 28-1 and 28-4 are electrically connected to each other by a printed wiring pattern 30 formed by an etching means or the like on the lower surface of the insulating substrate 29, and the upper surface of the insulating substrate 29 is also etched by the etching means. As shown in FIG. 5, commutator pieces 28-2 and 28-5, 28-3 and 28- are formed by a printed wiring pattern 31 formed of
6 is electrically connected to the armature coil 3-1, ..., 3
-3 are electrically commonly connected to each other, the other terminal of the armature coil 3-1 is connected to the commutator piece 28-1, and the other terminal of the armature coil 3-2 is connected to the commutator piece 28-. 5, the other terminal of the armature coil 3-3 is electrically connected to the commutator piece 28-3 by means such as soldering.

The armature coils 3-1 and 3-3 are adhered to the commutator substrate 27 with an adhesive, and the armature coils 3-2
Is also bonded to the upper surfaces of the armature coils 3-1 and 3-3 with an adhesive to form the three-phase flat coreless eccentric vibration armature 6.

The armature coils 3-1 and 3-3 are adhered to the commutator substrate 27 with an adhesive, and the armature coil 3-2 is also superposed on the upper surfaces of the armature coils 3-1 and 3-3 with an adhesive. Armature coils 3-1 and 3-
3 the winding start terminal 32 of the armature coil 3-1 and 3-
Even when the printed wiring pattern 31 on the upper surface of the commutator substrate 27 (insulating substrate 29) is soldered along the upper surface of the armature coil 3, the upper surface of the armature coils 3-1 and 3-3 has the armature coil 3 −
2 and a gap is formed between the case 9 and the flat coreless eccentric vibration armature 6-1 (armature coil 3-2) by the thickness of the armature coil 3-2. Three
The winding start terminals 32 of -1, 3-3 do not become an obstacle.

In the case of the flat coreless eccentric vibration armature 6, at least the winding start terminal 32 inside the armature coil 3-2, which is far from the field pole 15 in the axial direction, is set as described above. The commutator piece 28-5 of the commutator substrate 27 is directly passed through the side close to the field pole 15 in the axial direction.
Also, the winding start terminal 32 of the armature coil 3-2 is prevented from becoming an obstacle by guiding and electrically connecting to the printed wiring turn 31. This is the armature coil 3-
2, armature coils 3-1 and 3-3 are disposed below the armature coils 3-1 and 3-3, and the upper surface of the armature coils 3-1 and 3-3 corresponds to the thickness of the armature coil 3-2. Coil 3-
This is because a space for passing the second winding start terminal 32 can be formed between the upper surfaces of the armature coils 3-1 and 3-3 and the case 9.

According to the flat vibration generator 1 of the present invention,
Power terminal 1 for the battery of the pager that incorporates this
Three armature coils 3-1, ..., 3 via 4-1 and 14-2, brush portions 12b and 12b ', commutator 28 and the like.
If a current is applied to -3 as shown in FIG. 5 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, so that the fixed shaft 20
The flat coreless eccentric vibration armature 6 rotates in a predetermined direction.

When the flat type coreless eccentric vibration armature 6 rotates in a predetermined direction, the brush portions 12b and 12b 'and the commutator piece 28 are sequentially arranged so that a rotating torque in a predetermined direction is obtained.
The sliding positions of -1, ..., 28-6 switch, and continuous rotation torque in a predetermined direction is generated. Here, since the flat coreless eccentric vibration armature 6 is eccentrically formed, it eccentrically rotates while performing partial circular movement. Since the vibration due to the eccentric rotation of the eccentric vibration armature 6 and the eccentric amount in the circumferential direction propagate to the flat vibration generator main body 11, a device to which the flat vibration generator 1 is attached, for example, a pager main body is mounted. Vibration is transmitted to the pager and the pager can be informed that there is a call due to vibration.

The flat coreless eccentric vibration armature 6 may be molded with a resin except for the commutator 28 in order to make it rigid.

[0029]

According to the flat-type vibration generator of the present invention, the conventional flat-type coreless eccentric vibration armature can be obtained by only increasing the number of winding turns of one of the three armature coils. Compared with the case of using, a larger vibration is generated, which is suitable for a card type pager.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a flat vibration generator according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the flat vibration generator.

FIG. 3 is a plan view for explaining the brush.

FIG. 4 is a vertical cross-sectional view taken along line X-X ′ in FIG.

[Fig. 5] Field poles, flat coreless eccentric vibration armature,
It is a development view of a commutator and a brush.

FIG. 6 is a plan view of a three-phase flat coreless eccentric vibration armature.

FIG. 7 is a bottom view of the flat coreless eccentric vibration armature.

[Explanation of symbols]

 1 Flat type vibration generator 3-1, ..., 3-3 Coreless armature coil 3a, 3a 'Effective conductor part which contributes to generated torque 3b, 3c Conductor part which does not contribute to generated torque 6 3-phase flat type coreless eccentricity Vibration armature 9 case 10 Bracket 11 Flat type vibration generator main body 12-1, 12-2 Brush 12a, 12a 'Power supply conductive part 12b, 12b' Brush part 14-1 Positive power supply terminal 14-2 Negative power supply terminal 15 Field pole 16 Through hole 17 Power supply lead wire mounting piece 18-1, 18-2 Lead wire 19 Solder 20 Fixed shaft with flange 21 Through hole 22 Tsuba 23 Slider 24 Bearing 25 Cylindrical Spacer 26 Cylindrical Resin 27 Commutator Substrate 28 Commutator 28-1, ..., 28-6 Commutator Piece 29 Insulating Substrate 30,31 Printed Wiring Pattern 32 Winding Start Terminal

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Claims (1)

[Claims] 1. N is so arranged that adjacent magnetic poles have different polarities.
The stator includes a four-pole field pole having S and S poles, and the three air-core armature coils are circumferentially phase-shifted to form a three-phase armature coil group. Of the three-phase flat coreless eccentric vibrating armature formed in an eccentric shape of a substantially semicircular plate when viewed in the axial direction in which they are doubly overlapped with each other, face-to-face with the field pole through an axial gap. In addition, the rotor is eccentrically rotatable, and the armature coil in the middle of the three-phase flat coreless eccentric vibration armature is wound with a larger number of turns than the other armature coils to make it larger. A three-phase flat type coreless eccentric vibration armature is formed by winding so as to obtain a torque to form a three-phase flat type coreless eccentric vibration armature. Two provided to be electrically connected to the positive power supply terminal side and the negative power supply terminal side Flat type vibration generator being characterized in that the brush opening angle width of approximately one pole width is brought into sliding contact with the commutator.