KR890005914Y1 - Armature of flat motor - Google Patents

Abstract

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Description

Armature of flat motor

The figure corresponds to an embodiment of the present invention, and FIG. 1 is a partial longitudinal cross-sectional view in a completed state of a flat motor.

2 is an exploded perspective view of a flat motor.

3 is a front view showing the correlation between the disassembled permanent magnet for the field and the armature in the rotating state.

4 is a plan view of what is shown in FIG.

5 is a front view showing the interrelationship between the four-divided permanent magnets and the armature in the rotating state.

6 is a plan view of what is shown in FIG.

FIG. 7 is a front view in a state where the original plate of the VII-VII command armature of FIG. 1 is omitted. FIG.

FIG. 8 is a cross-sectional view taken along line VII-VII of FIG. 7. FIG.

9 is a perspective view showing a state in which a thin plate is wound around the core.

Figure 10 is a front view showing the shear of the pressing step of the iron core coil completed in the cross-section circular.

11 is a front view similarly showing the rear end of the pressing process.

12 is a perspective view of an iron core for a finished armature coil.

13 is a front view as seen from the inside of the motor case 7.

14 is a plan view of what is shown in FIG.

FIG. 15 is a longitudinal sectional view of what is shown in FIG.

Figure 16 is a front view of the motor case seen from the inside.

FIG. 17 is a plan view of what is shown in FIG.

FIG. 18 is a longitudinal sectional view of the one shown in FIG.

* Explanation of symbols for main parts of the drawings

1: flat motor 2: armature

3: air gap part 4: permanent magnet for field

9: iron core 33: challenge line or challenge foil

34: armature coil 34a: surface

34b: back side 35: divider

36: negative

The present invention relates to the armature of the flat motor, especially when the permanent magnet with low magnetic flux density of ferrite type is used because it is formed by adhering the plate made of double-sided magnetic material of the armature coil wound with the core as the core. The present invention relates to an armature of a flat motor, which can obtain rotational force and can be made extremely thin.

Recently, small motors are widely used in toy sound equipment, cameras, etc. In addition, portable stereos, cassettes, tape recorders, etc. are increasingly required for miniaturization and high sound quality, so that ultra-thin and high performance small motors have been required.

Therefore, it has been difficult to miniaturize the structure of a conventional small motor, and it has been increasingly adopted to move a low coil and a low indoctans moving coil to avoid a stall type motor in which the weight of the motor is large.

However, the armature of the moving motor has a low magnetic flux density, so when manufacturing ultra thin motors, ferrite magnets cannot obtain a predetermined rotational force and must use very expensive materials such as samarium cobalt permanent magnets. Because of this motor was also very expensive defects.

(See Japanese Utility Model Publication No. 56-133774)

The present invention has been devised to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to provide magnetic for each electric coil on the surface of the permanent magnet side of the plurality of electric coils wound by the core of the core in the flat motor as a nucleus. The space between the motor and the case is not related to the electric circuit because it adheres the partition plate made of the material and at the same time, the plate for forming the electric circuit is attached to each coil over the coil to form the armature. In addition, the air gap between the splitter plate and the permanent magnet for the field can be narrowly formed even in a very high path, so that the magnetic flux generated in the electric coil is concentrated on the iron core and the splitter to reduce the floating magnetic flux and generate the armature. The magnetic flux density is increased so that even when a small motor is manufactured using ferrite inexpensive permanent magnets, powerful rotational power can be obtained. There is a help.

Another object is to provide an armature of a flat motor that can be made ultra-thin again even when expensive permanent magnets such as Arunicoge and samarium cobalt are used.

In short, the present invention is a flat motor in which the structure of the armature is flat and the permanent magnets for the field are disposed to face the armature through an air gap on the axial side of the armature. On the surface of the permanent magnet side of the plurality of electric coils formed by winding the foil a predetermined number of times, a partition plate made of a magnetic material is adhered to each electric coil, and at the same time, the back surface of the electric coil is made of a magnetic material for forming an electric circuit. The disc is made by sticking over each coil.

The flat motor 1 according to the present invention has the structure of the armature 2 as a flat disc as shown in FIGS. 1 and 2, and the field through the air gap 3 on the axial side of the armature. Permanent magnet (4), brush mounting device (5), motor case (6) (7), iron core (9) for electric coil, flat commutator (10), rotary shaft (11), star washer (12) The mounting plate 13 which consists of magnetic materials is comprised mainly.

First, the field permanent magnet 4 for the flat motor 1 is demonstrated with reference to FIGS.

That is, the permanent magnet 4 is divided into a plurality, that is, divided into two, the dividing line ℓ forming the radial end portion 14a of each divided permanent magnet piece 14 is the center of rotation (0) of the armature 2 It is formed in a non-parallel state, that is, non-radial, with respect to the normal line (L ₂ ) from).

Thus, the dividing lines l ₁ of the two permanent magnet pieces 14 are formed in parallel with each other, and parallel spheres 15 of the same kind are formed between the permanent magnet pieces 14.

The number of permanent magnet pieces 14 is not limited to two, that is, as shown in FIG. 5, the permanent magnet pieces 14 of the permanent magnets 4 can be divided into four, and in this case, the permanent magnets are also possible. The dividing line l ₁ constituting the end portion 14a of the piece 14 is formed in a non-parallel state with respect to the normal line l ₂ from the center of rotation 0 of the armature ₂ , that is, the dividing line L ₁ ) is formed non-radially from the center of rotation of the armature 2.

And the parallel sphere 15 is formed longitudinally and horizontally like the permanent magnet 4 shown in FIG.

Therefore, no matter how many permanent magnets 4 are divided, the dividing line l ₁ of each permanent magnet piece 14 is always non-radially formed with respect to the rotation center 0 of the armature 2.

In this way, the dividing line of each permanent magnet piece 14 of the permanent magnet 4 is non-radially formed when passing through the position where the armature 2 is placed and entering the magnetic field of each permanent magnet piece 14. This is to prevent a sudden change in the distribution, thereby reducing the rotational torque fluctuation.

Next, the brush mounting apparatus 5 of the flat motor 1 will be described with reference to FIGS. 1 to 6. In the brush mounting apparatus, parallel grooves 15 formed between the divided permanent magnet pieces 14 are provided. The carbon brush 19 attached to one end of the brush 18 is accommodated in contact with the commutator 10, and the brush 18 is contained in the thick plate of the permanent magnet 4.

The brush spring 20 of the brush 18 passes through the mounting plate 13 made of magnetic material by means of the piece 21 and the nut 22 and through the washer 25 made of the insulator 24 and the insulating material. It is fixed to the motor case 7 and the nut 22 is connected to the terminal 26 by the lead wire 27.

The mounting plate 13 is formed of a steel plate in a disk shape, and the shaft number 28 of the rotary shaft 11 is fixed to the center thereof so that one end 11a of the rotary shaft 11 is supported by the shaft number.

As such, in the brush mounting apparatus 5 of the present invention, the brush 18 is completely inserted into the parallel groove 15 of the permanent magnet 4, and the space for brush mounting does not need to be set separately. It is to be able to reduce the thickness of the motor (1).

The equilibrium rectifier 10 is fixed to the rotating shaft 11 via the insulator 30, and the commutator has three minutes in the circumferential direction by the insulator 30 when the armature 2 is three-pole as shown in the figure. do.

Thus, between the insulators, a conductive plate 31 made of a copper plate or a silver alloy plate having good conductivity is mounted.

Thus, the carbon brush 19 of the brush 18 is pressed against the conductive plate and brought into contact with the conductive plate.

Next, the armature 2 of the flat motor 1 will be described with reference to FIGS. 1, 2, 7 and 8.

The armature 2 is formed on the surface 34a of the permanent magnet 4 side of the plurality of armature coils 34 formed by winding the conductive wire or the conductive foil 33 on the iron core 9 in a predetermined number of times. In each case, the partition plate 35 made of the magnetic material is adhered to each other, and on the back surface 34b of the electric coil 34, a disk 36 made of the magnetic material for forming the electric circuit is adhered over each armature coil 34. .

Thus, the disc 36 was fixed integrally with the insulator 39 of the commutator 10 and was press-fitted to the rotating shaft 11.

In addition, an iron plate is used as a magnetic material of the partition plate 35 and the original plate 36.

The adhesion of the partition plate 35 and the disc 36 to the surface 34a and the back surface 34b of the armature coil 34 is performed between the permanent magnet 4 and the mounting plate 13 and the armature 2. The armature circuit is to be formed.

Therefore, the space 38 between the disc 36 and the inner surface 6a of the motor case 6 has no relation to the circuit described above, and the motor cases 6 and 7 also have the electric circuit. Has become irrelevant at all.

Iron core (9) is formed by winding the thin plate (39) made of a magnetic material is to increase the coercive force compared to the solid iron core.

Furthermore, compared with the conductive wire or the conductive foil 33 constituting the armature coil 34, if the conductive wire is wound 671 times, when the thickness of the conductive foil is, for example, 20μ, it is 855 times in the same volume. I can wind it up.

The occupancy of the volume is improved compared to the conductive line, and as a result, the efficiency can be increased by 30% compared to the case of the conductive line. Therefore, in the ultra-compact flat motor 1, the conductive foil can be used to obtain more powerful output.

Next, the wiring of the armature coil 34 in FIG. 7 will be described. In the case of delta (△) connection, S is a counter clock in the drawing in which the conductive wire or the conductive foil 33 of each armature coil 34 starts to be wound. The terminal 31a of the conductive plate 31 of the commutator 10 on the direction side is connected, and the winding end E is connected to the terminal 31a of the conductive plate 31 in the clockwise direction.

Since the wiring is the same below, the commutator 10 and each armature coil 34 are electrically connected.

Next, the iron core 9 for the armature coil 34 will be described.

In FIGS. 9 to 12, the manufacturing method of the iron core 9 will first be described. As shown in FIG. 9, the thin plate 39 made of the iron plate made of magnetic material is indicated by the arrow A with respect to the core 40. Wind up as shown.

At this time, one end 39a of the thin plate 39 is locked to the groove 40a formed in the core 40, thereby rotating the core 40 to wind the thin plate 39.

The core 40 uses an iron rod having a diameter of about 1.5 mm.

In this manner, the thin plate 39 is wound around the core 40 with a spiral winding to form an iron core coil 41 having a circular cross section as shown in FIG. 10, and the core core coil 40 is removed from the iron core coil and the electric core coil is removed. The first press type 51 having the groove 51a at the same angle as the center angle Q by the number of poles 34 and the second press type 52 having the arcuate concave surface 52a cooperate with each other. It is set as the linear iron core 9 which has a center angle which is equal to the center angle Q of 34).

In practice, the first press 51 is the lower press form and the second press 52 is the press form, and the second press 52 is placed on the first press 51 as shown in FIG. The iron core coil 41 is lowered as shown by arrow B, and as shown in FIG. 11, the iron core coil 41 is squeezed by both presses 51 and 52 and the iron core 9 is pressed as shown in FIG. It can manufacture.

In addition, the method of manufacturing the iron core 9 can be manufactured by using a narrow thin plate 39 that is the same width as the iron core 9, but in order to manufacture it more efficiently, it is considerably wider than the width of the iron core (9). A thin plate 39 having a width may be wound around the core 40 and formed as shown in FIG. 11, and then cut into a required width.

The iron core 9 thus completed may be wound with a conductive wire or a conductive foil 33 around the iron core 9 when the armature coil 34 is manufactured. The iron core 9 may be inserted.

By using the iron core 9 in the state where the thin plates 39 are laminated in this way, rather than using the solid iron core in any case, the coercive force is much stronger and a very large rotational force can be obtained from the armature.

Next, the motor cases 6 and 7 will be described with reference to FIGS. 2 and 14 to 18.

In the flat motor 1 according to the present invention, since the magnetic circuit is formed of only the permanent magnet 4, the mounting plate 13, and the armature 2 as described above, the motor case 6, 7 is magnetic. It was removed from the circuit, and the motor cases 6 and 7 made non-ferrous synthetic resin available.

However, when synthetic resin is used in the motor cases 6 and 7, it is difficult to absorb the noise generated in the flat motor 1, and noise may occur in an electronic device using a weak current. It is preferable to use synthetic resin which mixed iron powder which is a magnetic material for noise prevention to the motor cases 6 and 7.

Next, the structure of the motor cases 6 and 7 will be described. As shown in FIGS. 14 through 18, the motor case 7 is formed in a circular shape, and the wall portion 7a has a cracked portion 7b. In the small diameter portion 7d continuous to the large diameter portion 7c, an L-shaped groove 7e bent in the circumferential direction and the axial direction was formed in one band.

Thus, the outer circumference of the mounting plate 13 was entered into the inner surface of the small diameter portion 7d. The motor case 6 is formed in the same shape as the motor case 7 and its inner periphery is inserted into the small diameter portion 7d of the motor case 7, and the set protrusion 6a is formed in the motor case 7. And the grooves 7e of the c) are fixed while being twisted in the circumferential direction with each other.

Thus, a hole 6b is formed in the center portion of the motor case 6, and the number of shafts 53 of the rotating shaft 11 is fixed to the hole.

The present invention has been constructed as described above and the following will be described.

First, the assembly of the flat motor 1 corresponding to the present invention will be described. The outer diameter of the commutator 10 is smaller than the width of the parallel sphere 15 formed by each permanent magnet piece 14 of the permanent magnet 4. It is set smaller and the cylindrical portion 10a of the commutator 10 is fitted into the cylindrical projection 36a of the disc 36 and is fixed to each other.

On the other hand, the armature coil 34 and the iron core 9 are combined, and the partition plate 35 is bonded thereto, and in this state, the original plate 36 is adhered to the back surface 34b of the armature coil 34.

Accordingly, the armature coil 34, the partition plate 35, the iron core 9, the disc 36, the commutator 10 and the rotary shaft 11 are integrally connected to each other to complete the armature 2.

Thus, the rotary shaft 11 is pressed into the disc 36 and the commutator 10, and the rotary shaft is fixed to the armature 2.

On the other hand, the motor case (7) is assembled and attached to the mounting plate 13, the piece 21 penetrates through the motor case (7) to protrude to the outside and the nut (outside of the motor case 7) The terminal 26 is mounted by 22 and at the same time the brush 18 is fixed to the piece 21.

In addition, when the motor case 7 is made of a conductive material, it is necessary to arrange an insulator between the terminal 26 and the piece 21 and the motor case 7.

Thus, the carbon brush 19 is giving elasticity by the brush spring 20.

In this way, when the brush 20 and the mounting plate 13 are mounted on the motor case 7, each permanent magnet piece 14 of the permanent magnet 4 is fixed to the mounting plate 13, and the rotating shaft ( When the armature 2 integrated with 11 is inserted from left and right in FIG. 2, one end 11a of the rotating shaft 11 is inserted into and supported by the bearing 28 of the mounting plate 13.

Each permanent magnet piece 14 may be fixed to the mounting plate 13 first.

At this time, since the commutator 10 is equilibrated, it is pressed lightly from the side with respect to the carbon brush 19 expected from the right side of the drawing, and the assembly of the brush is completed, and mounting is much easier than that of the cylindrical commutator.

In this way, when the armature 2 is assembled to the motor case 7, the armature 2 is guided and inserted into the rotary shaft 11 by the shaft number 53 to the motor case 6 and assembled to the motor case 7. .

At this time, the projection 6e of the motor case 6 penetrates into the groove 7e of the motor case 7 to rotate the motor case 6 clockwise with respect to the motor case 7 in the second direction. Since the projections 6e and the grooves 7e are engaged with each other, the motor cases 6 and 7 are fixed to each other, and the assembly of the flat motor 1 is completed.

As described above, the assembly of the series balanced motor 1 corresponding to the present invention is very simple, and since the brush 18 is accommodated in the thick plate of the permanent magnet 4, it is necessary to set a space for accommodating the brush separately. Since the flat motor 1 can be made very thin and the motor cases 6 and 7 are assembled, it is possible to thin the flat motor 1 up to 5.2 mm and the ultra thin flat motor. The rotor 1 can be realized.

Next, the characteristics of the flat motor 1 assembled in this way will be described. First, for the permanent magnets 4, the angles of the armature 2 with respect to the dividing line l ₁ of each permanent magnet piece 14 become non-radial. As shown in FIG. 3, the dividing line l ₃ constituting the end 34c of the armature coil 34 is formed radially with respect to the center of rotation of the armature ₂ and is parallel to the normal line l ₂ . When the armature coil 34 rotates as in C, the end 34c of the armature coil 34 first starts entering the magnetic field of the permanent magnet piece 14 at the outer peripheral end 14b of the permanent magnet piece 14. As the intersection point P between the end portion 34c and the dividing line L ₁ gradually moves inside, the electric magnetic coil 34 is attracted to the magnetic field of the permanent magnet piece 14.

For this reason, when the armature coil 34 passes through the electric position, a rapid change in the magnetic flux density does not occur, and as a result, the fluctuation torque for the armature 2 is reduced, thereby reducing the rolling stain of the armature.

This is the same even when four permanent magnet pieces 14 are set as shown in FIG.

In addition, in the brush mounting apparatus 5 according to the present invention as described above, since the brush 18 is accommodated in the thick plate of the permanent magnet 4, the thickness t of the flat motor 1 is made very thin. Although it can be about 5.2mm, it is possible to make the flat motor of the same thickness as the conventional one by adding the thickness of the permanent magnet (4) or the thickness of the armature (2) as much as it is thinner. Needless to say what you can get.

Thus, since the flat motor 1 can be greatly thinned by the brush mounting device 5, the stereo cassette tape recorder having a thickness as large as the width of the cassette tape can be realized for ten minutes and the high power required therein is generated. To provide a flat motor (1).

Next, in the armature 2 corresponding to the present invention, the partition plate 35 made of magnetic material is adhered to the surface 34a of the armature coil 34, and the disc 36 made of magnetic material is formed on the back surface 34b. ), A closed magnetic circuit is formed between the permanent magnet 4 and the mounting plate 13 and the armature 2 so that all magnetic fluxes emitted from the permanent magnet 4 and the armature 2 are The air gap can be extremely narrowed by increasing the degree of the air gap 3 between the permanent magnet 4 and the partition plate 35, thereby obtaining a powerful rotational force.

In addition, the space 38 between the armature 2 and the motor case 7 has nothing to do with the magnetic circuit, so there is no need to carefully control the size of the space, and the ferrite magnet using this space as an air gap. If you compare it to a large motor, you can get much stronger torque.

Therefore, in the flat motor 1 corresponding to the present invention, a cheap ferrite system is permanently used without using a samarium cobalt-based magnet that has been used in the motor for this kind of conventional motor or a strong permanent magnet comparable to this. The use of the magnet 4 also yields high power as with these expensive permanent magnets.

In addition, since the motor case (6) (7) is not used in the magnetic circuit, the motor case may be made of iron, of course, but it can be made of any material other than iron, that is, various synthetic resins, and the color or design can be changed freely. In addition, by mixing a magnetic material for preventing noise, that is, iron, into the synthetic resin, defects such as noise generated in the flat motor 1 and causing radio interference can be prevented.

The present invention is constructed and functioned as described above, so that a split plate made of magnetic material is adhered to each electric magnetic coil on the surface of the permanent magnet side of the magnetic coil wound around the core in a flat motor. In addition, the back of the armature coil adheres to each armature coil to form an armature to form a magnetic circuit. Therefore, the space between the motor and the case is independent of the magnetic circuit. Since the air gap is narrowly formed between the magnets, the magnetic flux generated in the armature coil can be concentrated on the iron core and the splitter to reduce the floating magnetic flux to increase the magnetic flux density generated by the armature. Even when a small motor is used, it is possible to obtain a powerful rotational force.

In addition, when using expensive permanent magnets such as arunico gesmarium, cobalt-based, there is an effect that can provide an armature of a flat motor capable of ultra-thin.

Claims (1)

In a flat motor in which the structure of the armature is flat on a flat plate and disposed to face the axial side of the armature, a plurality of windings formed by winding the conductive wire or the conductive foil 33 on the core 9 in a predetermined number of times. A magnetic material for adhering a partition plate 35 made of a magnetic material for each electric coil 34 on the surface of the permanent magnet side of the armature coil 34 and forming an electric circuit on the back of the armature coil 34. An armature of a flat motor, characterized in that the disk 36 is adhered over each coil.