JPH09140079A - Small motor coil and winding method thereof - Google Patents

Abstract

(57) [Abstract] [Problem] An air gap occurs between windings, and the space factor of the windings in the winding portion cannot be increased, and the number of turns cannot be increased. SOLUTION: The windings 60I to 70II are multiply wound on a small-diameter bobbin 10 and both ends 60Ia to 70IIb of the windings 60I to 70II are connected to three terminals 50a to 50c and the windings 60I, 60II and 70I, 70 are connected.
II is a pair of insulated metal wires 60I, 60
II, or 70I and 70II, the thin wires 60I and 70I and the thin wires 60II and 70II, each having a diameter of 1: 0.4, are inserted into the space between the thick wires and wound around the bobbin 10. 1 set of metal wire 60I
, 60II, or 70I, 70II, each of which is coated with a heat-fusible material to heat one set of metal wires, and two metal wires 60I,
60II or 70I, 70II are heat-sealed to each other and wound. One set of metal wires 60I, 60II or 70I, 70II can be inserted one by one, and two nozzle holes 100a in contact with each other,
Insert a pair of metal wires into 100b and insert two metal wires 60I, 60
II, or 70I, 70II are wound in contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil in which a winding is multiply wound on a small-diameter bobbin and both ends of the winding are connected to at least two terminals.

[0002]

2. Description of the Related Art For example, a winding used for a stator coil of a permanent magnet type stepping motor having a claw pole structure is wound around a bobbin made of thermoplastic synthetic resin,
The front view of FIG. 10A and the coil of FIG.
As shown in the enlarged cross-sectional view of FIG. 2B viewed from the line -A ', the bobbin 10 has a cylindrical winding portion 20 and a pair of annular flange portions 30, 30. , 3
0 is integrated so as to face both ends of the winding portion 20. A terminal holder 40 is integrated with a part of the outer edge of the one flange portion 30, and the three metal terminal pins 50a, 50b, 50c are projected to the outside of the terminal holder 40. It is erected. These winding parts 20,
Flange 30, terminal holder 40 and terminal pin 50a,
50b and 50c are integrated by insert molding.

The winding portion 20 of such a bobbin 10 has:
For example, two windings 60, 70 having a circular cross section with a wire diameter of 300 μm are wound in a bifilar shape. Specifically, of the two windings 60, 70, the winding start end 60a of one winding 60 is twisted to the terminal pin 50a and the winding start end 70a of the other winding is twisted to the terminal pin 50b. These two windings 60 and 70 are multiply wound in the same direction. The winding terminal end 60b of the winding wire 60 connected to the terminal pin 50a is twisted to the terminal pin 50b, and the winding terminal end 70b of the winding wire 70 connected to the terminal pin 50b is twisted to the terminal pin 50c.

[0004]

As described above, the bobbin 1
In the structure in which the windings 60 and 70 are wound around the winding portion 20 of 0, as shown in FIG.
An air gap 20a is formed between them, so that the space factor of the winding in the winding portion 20 cannot be increased due to the air gap 20a, and the number of turns cannot be increased. In particular, for a coil used in a stepping motor that is required to be small and thin, the outer diameter is 42 mm or less, and the size is severely limited, and the characteristics must be improved within the limited size. Under such conditions, if the space factor cannot be increased and the number of turns cannot be increased because the space 20a is generated as described above, the output torque of the small motor using the space cannot be increased. There was such a problem.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to increase the space factor of the winding wound around the coil to increase the number of turns and to increase the output torque. To provide a coil and a winding method thereof.

[0006]

In order to achieve the above-mentioned object, in the present invention, a winding is multiply wound on a small-diameter bobbin and both ends of the winding are connected to at least two terminals. In the small motor coil, each of the windings connected to each of the terminals is formed by winding at least two insulating coated metal wires in a set.

It is preferable that the metal wires of the one set have substantially the same wire diameter.

Further, preferably, the metal wires are a set of two wires, and the diameters of the wires are different from each other at a ratio of 1: 0.6 to 1: 0.7.

In order to achieve the above-mentioned object, according to the invention of the present application, a coil for a small motor in which windings are multiply wound on a small-diameter bobbin and both ends of the winding are connected to at least two terminals. In, each of the windings is a set of two metal wires with insulation coating, and each wire diameter is composed of a thick wire and a thin wire with a ratio of 1: 0.4, and the thin wire is inserted into the space between the thick wires. It is wound around the bobbin in the wound state.

Preferably, the one set of metal wires is coated with a heat-fusible material, and the one set of metal wires is heated to heat-bond the two metal wires to each other. It is wound around the bobbin in the wound state.

More preferably, the set of metal wires (6
0I, 60II, or 70I, 70II), each of which is coated with a fusible fusion material, and the fusible fusion material is dissolved in a chemical solvent to dissolve the two metal wires (60I, 60II, or 70I, 70II) are wound around the bobbin (10) in a state of being fused to each other in the wire length direction.

Further, in order to achieve the above-mentioned object, in the present invention, the one set of metal wires can be inserted one by one, and the one set of metal wires is inserted into two nozzle holes which are substantially in contact with each other. As a result, the two metal wires are wound around the bobbin while being in contact with each other.

In the conventional coil for a small motor, when the windings are wound on the bobbin, a gap is generated between the windings, whereas in the present invention, each winding connected to each terminal is wound. Since the wire has a structure in which at least two metal wires are wound in a set, the windings are wound in a dense state with each other, the air gap between the windings is reduced, and the winding space of the bobbin is reduced. The space factor of the occupying winding increases and the number of turns increases. Therefore, the output torque of a small motor using this coil can be increased.

In the case where the ratio of the wire diameters of the one set of metal wires is made different, the metal wires having a small ratio are likely to enter between the metal wires having a large ratio, so that the winding space of the bobbin is reduced. The occupying space of the winding is larger and the number of turns is further increased. Therefore, the output torque of a small motor using this coil can be further increased.

The winding is a set of two metal wires, each of which has a diameter of 1: 0.4 and is composed of a thick wire and a thin wire,
When the thin wire is wound around the bobbin in a state where it is inserted in the gap between the thick wires, the thin wires are inserted between the thick wires and are in contact with these thick wires, so that the space factor is extremely high. Becomes larger, the number of turns increases, and the output torque becomes larger.

In the case where two metal wires having different wire diameters are wound around the bobbin in a state where they are fused with each other by a heat fusion material or a fusible fusion material, the wire diameter is large. The metal wire and the metal wire having a small wire diameter are wound adjacent to each other, and the metal wire having a small wire diameter easily enters between the metal wires having a large wire diameter. Therefore, the space factor of the winding occupying the winding space of the bobbin is increased, the number of turns is further increased, and the output torque of the small motor using this coil can be increased.

Further, in the case of a winding method in which two metal wires are wound around the bobbin in a state where the two metal wires are in contact with each other by inserting the nozzle holes, a metal wire having a large wire diameter and a wire wire having a small wire diameter are used. Since the metal wire and the metal wire are wound adjacent to each other, a metal wire with a small wire diameter can easily enter between metal wires with a large wire diameter, and the space factor of the windings occupying the winding space of the bobbin becomes larger and the number of turns Further increase. Therefore, the output torque of a small motor using this coil can be further increased.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION First to sixth embodiments of a coil for a small motor and a winding method thereof according to the present invention will be described below. In the same configuration, the configuration other than the winding is basically the same as in FIG.
The coils are the same as the conventional coils for small motors shown in FIGS. 0 (a) and (b), and the same portions are denoted by the same reference numerals and their description is omitted. Further, the first to sixth embodiments of the present application are intended for a small motor coil in which a winding is wound on a small-diameter bobbin having an outer diameter of 42 mm or less.

First, the first embodiment will be described. The characteristic feature of this embodiment is that each of the windings 60 and 70 shown in FIGS. 10 (a) and 10 (b) of the related art is composed of one winding. On the other hand, as shown in the plan view of FIG. 1A and the partial cross-sectional view of FIG. 1B taken along the line BB ′ of FIG.
That is, the two windings connected to each terminal are insulated from each other except for both ends, and two metal wires are set as one set.

Specifically, a total of two sets of two windings each having substantially the same diameter are prepared, and at this time, the total cross-sectional area of the two metal wires constituting one set is conventionally A metal wire having a wire diameter that is approximately the same as or slightly larger than the cross-sectional area of one winding wound on a bobbin with a diameter of 42 mm or less is used. More specifically, while the wire diameter of the conventional winding is 300 μm, the windings 60I, 60II and 70 of the first embodiment of the present application are used.
The diameter of each of the metal wires of I and 70II is about 220 μm.

These two sets of windings 60I, 60II and 70
When winding the I and 70II around the bobbin 10, the winding start ends 60Ia and 60IIa of the windings 60I and 60II of one set are wound.
Are aligned and connected to the terminal pins 50a. The winding start ends 70Ia and 70IIa of the other pair of windings 70I and 70II.
Are aligned and connected to the terminal pins 50b. Next, the windings 60I and 60II and the windings 70I and 70II are respectively 2
One set of the bobbins 10 are bundled in a state of being in contact with each other, and a predetermined tension is applied to the winding portion 20 of the bobbin 10 in the same direction and 190
The winding ends 60 of the windings 60I and 60II connected to the terminal pin 50a after being wound into a lap winding state.
Ib and 60IIb are connected to the terminal pin 50b by being twisted, and the winding ends 70Ib and 70IIb of the windings 70I and 70II connected to the terminal pin 50b are connected to the terminal pin 50c by being twisted. Then, the connected winding start ends 60Ia, 60IIa,
70Ia, 70IIa and winding ends 60Ib, 60II
b, 70Ib, 70IIb are fixed to the respective terminal pins 50a, 50b, 50c by dip soldering or the like.

With the above configuration, in the first embodiment of the present application, two sets of windings 60I, 60II and 70I, 70II can be wound in a dense state, and the windings 60I, 60II and 70I, 7
The space between 0II is made extremely small, and the winding part 2 of the bobbin 10 is
The space factor of the windings 60I, 60II and 70I, 70II occupying 0 can be increased to increase the number of turns.

In particular, the winding having a cross-sectional area obtained by combining two metal wires 60I and 60II (70I and 70II) constituting one set of windings is conventionally wound around a bobbin having an outer diameter of 42 mm or less. Since the structure uses a metal wire with a wire diameter that is almost the same as or slightly larger than the cross-sectional area of the output, the output is combined with increasing the number of turns by making the winding resistance almost the same as or smaller than the conventional one. The torque can be surely increased.

Further, as described above, the wire diameter of each metal wire forming one set of windings is smaller than that of the conventional winding. For this reason, conventionally, since the winding wire is thick, when winding it, the winding wire is wound so as not to extend beyond the outermost radial end of the winding portion 20 of the bobbin 10 so as not to protrude from the bobbin. Although the unwound remaining space was generated in the vicinity of the outermost periphery of the winding portion 20, the space factor could not be increased, but in the first embodiment of the present application, the windings 60I, 60II and 70 are formed.
Since each of I and 70II is thin, it can be wound up to the closest vicinity of the outermost peripheral end of the winding part 20, the space factor is increased, and the number of turns can be increased.

Furthermore, the wire diameter of each metal wire forming one set of windings is made smaller than that of the conventional winding to increase the space factor and increase the number of turns, thereby adjusting the increased number of turns. As a result, the electric resistance of the entire coil can be adjusted, and specifications such as output torque settings can be easily set.

In order to confirm the performance of the coil according to the first embodiment of the present invention described above, the output torque characteristic of the small motor using this coil was measured with the conventional one shown in FIGS. 10 (a) and 10 (b). Compared and done. Specifically, the pulse rate of the input frequency was increased and the pullout torque for this pulse rate was measured. As a result, as shown in FIG. 2, it was confirmed that the solid line of the present invention (invention product) can obviously obtain a larger pullout torque than the broken line of the conventional product (conventional product).

Next, the second embodiment of the present invention will be described. The difference between the first embodiment and the second embodiment of the present invention is that the two metal wires constituting one set of windings of the first embodiment are different from each other. While the wire diameters are set to be almost the same, in the second embodiment of the present application, as shown in FIG.
Of the II (70I, 70II), one metal wire 60I (7
0I) and the other metal wire 60II (70II) have a wire diameter of 1:
That is, the configuration is different at a ratio of 0.6 to 0.7. That is, the metal wire 60II (70II) is the metal wire 60I
It is thinner than (70I). The configuration other than this difference is similar to that of the first embodiment.

With the above-described structure, the second embodiment of the present application can not only achieve the same effect as the first embodiment described above, but also the thin line 6 between the thick lines 60I (70I).
With 0II (70II), the space factor can be increased and the number of turns can be increased.

In order to confirm the performance of the small motor coil of the second embodiment of the present invention described above, the output torque characteristic was measured in the same manner as in the first embodiment described above. As a result, it was confirmed that the second embodiment of the present invention shown in FIG. 4 can obtain a slightly larger output torque than the case of the first embodiment shown in FIG.

Next, the third embodiment of the present invention will be described. The characteristic feature of the third embodiment of the present invention is that the windings 60 and 70 shown in FIGS. While it was composed of a book winding, FIG. 5 (a),
As shown in (b), the winding is made into a set of two metal wires with insulation coating, and the two metal wires have a thick wire 60I (70I) with a diameter ratio of 1: 0.4.
And thin wire 60II (70II), and thin wire 60II, 70II
Is to be wound around the bobbin 10 while being inserted in the gap between the thick lines 60I and 70I.

This wire diameter ratio is set to 1: 0.4 because the thin wires 60II and 70II are inserted between the four thick wires 60I and 70I as shown in FIG. This is because four cross sections are in contact with each other and these four cross sections are in contact with each other. More precisely, the ratio of the wire diameters is 1: 1.4142, which is a ratio of 1 to 2 parallel roots. Further, since a predetermined tension is applied when the winding is wound, the wire diameters of the metal wires 60I, 60II and 70I, 70II are slightly reduced. Therefore, the thick metal line 6
The thin wire 60II has a wire diameter ratio of 0I (70I) and thin wire 60II (70II) of, for example, 1: 0.4 to 1: 0.5.
Even if the (70II) side is made slightly larger, it can be inserted in contact with the thick lines 60I (70I) having four cross sections.

The first aspect of the third aspect of the present application
Explaining the mode and the second mode, in the first mode, as shown in FIG. 5A, the number of turns of the thick line 60I (70I) and the thin line 60II (70II) is different, that is, the thin line 60II (7).
0II) is less, and most of the fine lines 60
II (70II) is surrounded by thick lines 60I (70I) having four cross-sections so as to be in contact with each other.
Only I) is exposed to the outside in the radial direction.

In the second mode, as shown in FIG. 5B, a thick line 60I (70I) and a thin line 60II (70II).
Of the same number of turns, the outermost thin wire 60II (70
II) except for the thin lines 60II (70II) each having four cross sections on both flange portions 30, 30 side, most of the thin lines 60II (70II) have a thick line 60I (70) having four cross sections.
I) Enclosed in contact with each other.

Regarding the configuration of the third embodiment of the present invention described above, it is not necessary to consider the limitation that the cross-sectional area of one set of windings is almost the same as or slightly larger than that of the conventional one as in the first embodiment. Absent. The configuration other than the features described above is the same as that of the first embodiment.

In the third embodiment of the present invention having such a configuration, not only can the same effects as those of the first embodiment described above be exhibited, but the thin wire 60II (70II) can be replaced by the thick wire 60I (70I) having four cross sections. As it is inserted between them, the four cross sections are in contact with each other, and the four cross sections are also in contact with each other, so that there is almost no space between the windings, and the space factor is greatly increased to increase the number of turns. The torque can be increased.

As a modification of the above-mentioned second and third forms, first, as shown in FIG.
Wrap I and 60II around the winding portion 20. At this time, a thick line 60I is formed on the inside and a thin line 60II is formed on the outside. Next, the other set of windings 70I and 70II is wound around the outer circumference of the one set of windings 60I and 60II. And this time, one set of windings 60I, 60II is connected to the other set of windings 70I,
One set of windings 60, such as winding around the outer circumference of 70II
I and 60II and the other set of windings 70I and 70II are alternately wound, that is, aligned winding. With the above configuration, the thin wire 60II (70II) can be reliably arranged between the thick wires 60I (70I). Therefore, the air gap between the windings can be reduced and the space factor can be increased to increase the number of turns.

Next, the fourth to sixth embodiments of the present invention will be described. These fourth to sixth embodiments are the second and third embodiments described above, that is, a coil in which one set of winding wire is composed of a thick wire and a thin wire. This is applicable, and the two insulation-coated metal wires forming one set of windings described above are wound around a bobbin while being bonded to each other in the wire length direction.

First, the fourth embodiment will be explained. When the two metal wires which are insulated and coated as described above are bonded to each other, the thick wire and the thin wire are heat-sealed to be bonded to each other. Specifically, the entire circumference of each of the thick wires and the thin wires covered with insulation is covered with a heat-fusible material. These one set of thick wires and thin wires are arranged in contact with each other in the wire length direction and immediately before being wound on the bobbin, they are heated over their entire length to be bonded. As the heat-fusible material, a polyester-based, polyamide-based, or epoxy-based thermoplastic fusion coating agent, or a thermosetting fusion coating agent comprising a thermosetting varnish is used, and each heat-melting temperature is Polyester type is 130 ~ 150 ℃, Polyamide type is 140 ~ 200 ℃, Epoxy type is 140 ~ 1
The temperature of the thermosetting varnish is 80 to 220 ° C.

Next, the fifth mode will be explained.
In the configuration, instead of the heat fusion material, a soluble fusion material is used to cover the entire circumference of each thick wire and each thin wire. As the soluble fusion material, a butyral-based material is used, and each thick wire and thin wire coated with this butyral-based material are lined up in contact with each other in the wire length direction and wound around a bobbin, while methyl alcohol or denatured alcohol or By spraying a chemical solvent such as ethyl acetate onto the portion immediately before being wound on the bobbin, the butyral-based soluble fusion agent is dissolved to cause tackiness, and each thick line and thin line are bonded in the longitudinal direction. Let go

Explaining the sixth embodiment, as shown in FIG. 7, one rectangular metal plate is prepared as the nozzle plate 100. This nozzle plate 100 has two nozzle holes 100a,
The holes 100a and 100b are bored so that they are almost in contact with each other, and the diameters of the nozzle holes 100a and 100b are 60 I
(70I) and the thin wire 60II (70II) are almost the same. Such a nozzle plate 100 is disposed close to the bobbin, and the two nozzle holes 100a and 100b are provided with a thick line 60.
I (70I) and the thin wire 60II (70II) are inserted into the bobbin so that the thick wire and the thin wire are in contact with each other. The nozzle plate 100 is entirely plated with hard chrome, or the nozzle holes 100a and 100b are formed.
By arranging the ruby on the inner peripheral part of
Thick lines and thin lines are inserted into the nozzle holes 100a and 100b so that they do not wear even if they slide.

In the sixth aspect of the present application, the fourth,
The heat treatment or the chemical solvent treatment may be performed immediately after passing the respective wires 60I to 70II on which the heat-sealing material or the heat-sealing material is applied through the nozzle 100 by combining the five modes. With this configuration, one set of thick wire and thin wire Can be bonded in a state where they are securely aligned without twisting each other.

In the fourth to sixth forms described above,
The thick wire and the thin wire are surely wound adjacent to each other. Therefore, a metal wire having a small wire diameter is likely to enter between metal wires having a large wire diameter. Therefore, the space factor of the winding occupying the winding portion of the bobbin is further increased, the number of windings can be further increased, and the output torque of the small motor using this coil can be further increased.

Even in the fourth to sixth embodiments described above, similarly, if the configuration of the aligned winding described as the modified examples of the second and third embodiments is employed, the space factor and the output torque are further improved. To do.

In order to confirm the performance of the coils for small motors according to the fourth to sixth aspects of the present invention described above, the output torque characteristics were measured in the same manner as in the first aspect. At this time, as a comparative example, as shown in FIG. 8A, a coil (invention product A) which does not intend to have a configuration in which the thick line and the thin line are in contact with each other in the wire length direction was prepared. In addition, the fourth application
As shown in (b) of FIG.
One in which the thin wire and the thick wire contacted at least every pair (invention product B) and one in which the thin wire and the thick wire contacted each other as shown in FIG. . As a result, as shown in FIG. 9, the conventional product indicated by the broken line,
A large output torque can be obtained in the order of invention product A shown by a solid line, invention product B shown by a one-dot chain line, and invention product C shown by a two-dot chain line, and a thick wire and a thin wire are in contact with each other and are wound in an aligned manner. Was confirmed to be the best.

It should be noted that the above-described one set of windings according to the first to sixth embodiments of the present application is not limited to two sets, but three sets.
The number of turns may be increased by increasing the space factor by making the number of books or more. In this case, the various shapes described above can be applied by making the wire diameters of the metal wires all the same or different, or making the diameters of the metal wires partially different and the same.

Further, the present invention is not limited to the bifilar winding disclosed in the embodiments of the present application, but various types such as a unifilar winding, or two terminal pins and only one set of windings wound between these terminal pins. The present invention can also be applied to this configuration, and the same operational effects as those described above can be obtained.

[0047]

As described above, according to the present invention, the windings are wound in a dense state with each other, the gap between the windings is reduced, and the winding space occupying the winding space of the bobbin is occupied. The product ratio increases and the number of turns increases. Therefore, the output torque of a small motor using this coil can be increased.

When the ratio of the wire diameters of the one set of metal wires is made different, the metal wires having a small ratio are easily inserted between the metal wires having a large ratio, and the number of turns is further increased. Therefore, the output torque of a small motor using this coil can be further increased.

The above-mentioned winding is a set of two metal wires, and each wire diameter is composed of a thick wire and a thin wire having a ratio of 1: 0.4,
When the thin wire is wound around the bobbin in a state where it is inserted in the gap between the thick wires, the thin wires are inserted between the thick wires and are in contact with these thick wires, so that the space factor is extremely high. Becomes larger, the number of turns increases, and the output torque becomes larger.

In the case where two metal wires having different wire diameters are wound around the bobbin in a state where they are fused with each other by a heat fusion material or a soluble fusion material, the wire diameter is large. The metal wire and the metal wire having a small wire diameter are wound adjacent to each other, and the metal wire having a small wire diameter easily enters between the metal wires having a large wire diameter. Therefore, the number of turns is further increased, and the output torque of the small motor using this coil can be further increased.

Further, in the case of a winding method in which two metal wires are wound around the bobbin while being in contact with each other by inserting the nozzle holes, a metal wire having a large wire diameter and a wire wire having a small wire diameter are used. Since the metal wire and the metal wire are wound adjacent to each other, the metal wire having a small wire diameter easily enters between the metal wires having a large wire diameter, and the number of turns is further increased. Therefore, the output torque of a small motor using this coil can be further increased.

[Brief description of the drawings]

FIG. 1 shows a coil for a small motor according to an embodiment of the present invention, in which (a) is a plan view and (b) is BB of (a).
FIG. 3 is an enlarged cross-sectional view taken along line ′.

FIG. 2 is a characteristic diagram showing an output torque of a coil for a small motor according to an embodiment of the present invention in comparison with a coil for a conventional small motor.

FIG. 3 is an enlarged cross-sectional view showing a small motor coil according to an embodiment of the present invention.

FIG. 4 is a characteristic diagram showing an output torque of a coil for a small motor according to an embodiment of the present invention compared with a coil for a conventional small motor.

5A and 5B show a small motor coil according to an embodiment of the present invention, in which FIG. 5A is an enlarged sectional view of a first mode thereof, and FIG. 5B is an enlarged sectional view of a second mode thereof.

FIG. 6 is an enlarged cross-sectional view showing a small motor coil according to a modification of the embodiment of the present invention.

FIG. 7 is a perspective view showing a method of winding a coil for a small motor according to an embodiment of the present invention.

FIG. 8 shows a small motor coil according to an embodiment of the present invention, in which (a), (b), and (c) are enlarged cross-sectional views thereof.

FIG. 9 is a characteristic diagram showing the output torque of the small motor coil according to the embodiment of the present invention in comparison with the conventional small motor coil.

10A and 10B show a conventional small motor coil, in which FIG. 10A is a plan view and FIG. 10B is an enlarged sectional view taken along line AA ′ of FIG.

[Explanation of symbols]

 10 Bobbin 20 Cylindrical Winding Part 30, 30 Annular Flange Part 40 Terminal Holder 50a, 50b, 50c Metal Terminal Pin 60, 70 Winding (Metal Wire) 60I, 70I Winding (Metal Wire), Thick Wire 60II, 70II Winding (metal wire), thin wire 60a, 70a, 60Ia, 60IIa Winding start end 60b, 70b 60Ib, 60IIb Winding end 100 Nozzle plate 100a, 100b Nozzle hole

Claims (9)

[Claims] 1. A winding (60I-
70II) are wound in multiple layers to form the windings (60I to 70II).
In a coil for a small motor in which both ends (60Ia to 70IIb) of each are connected to at least two terminals (50a to 50c), each winding (60I to 70II) connected to each of the terminals (50a to 50c). Is a coil for a small motor, characterized in that at least two metal wires (60I, 60II, or 70I, 70II) each covered with an insulating coating are wound in a set. 2. The coil for a small motor according to claim 1, wherein the pair of metal wires (60I, 60II or 70I, 70II) have substantially the same wire diameter. 3. The metal wire (60I, 60II, or 7)
0I, 70II) is a set of two and the wire diameters thereof are different from each other at a ratio of 1: 0.6 to 1: 0.7. 4. The set of metal wires (60I, 60II, or 70I, 70II) is coated one by one with a heat-fusible material, and the set of metal wires (60I, 60II and 70I). , 70II) is heated and the two metal wires (60
4. A coil for a small motor according to claim 3, wherein I, 60II, or 70I, 70II) is wound around the bobbin (10) in a state of being thermally fused to each other in the wire length direction. 5. Each of the pair of metal wires (60I, 60II, or 70I, 70II) is coated with a fusible fusion material, and the fusible fusion material is melted with a chemical solvent to dissolve the fusible metal. Metal wires (60I, 60II, or 70I, 70
The coil for a small motor according to claim 3, wherein (II) is wound around the bobbin (10) while being fused to each other in the wire length direction. 6. A winding (60I ...
70II) are wound in multiple layers to form the windings (60I to 70II).
A coil for a small motor in which both ends (60Ia to 70IIb) are connected to at least two terminals (50a to 50c), the windings (60I, 60II and 70I,
70II) is a set of two metal wires (60I, 60II, or 70I, 70II), each of which has an insulation coating, and each wire diameter is a thick wire (60I, 70II) having a ratio of 1: 0.4.
I) and thin wires (60II, 70II),
II, 70II) is wound around the bobbin (10) in a state of being inserted in the gap between the thick wires (60I, 70I), and is used for a small motor coil. 7. The set of metal wires (60I, 60II, or 70I, 70II) is coated with a heat-fusible material one by one, and the set of metal wires is heated to form the two wires. 7. The coil for a small motor according to claim 6, wherein a plurality of metal wires (60I, 60II, or 70I, 70II) are wound around the bobbin (10) while being heat-sealed to each other. 8. A set of metal wires (60I, 60II, or 70I, 70II) is coated with a fusible fusion material, and the fusible fusion material is melted with a chemical solvent. Metal wires (60I, 60II, or 70I, 70
7. The coil for a small motor according to claim 6, wherein II) is wound around the bobbin (10) while being fused to each other in the wire length direction. 9. The method for winding a coil for a small motor according to claim 3 or 6, wherein the set of metal wires (60
I, 60II, or 70I, 70II) can be inserted one by one, and two nozzle holes (100
a, 100b), the pair of metal wires (60I, 60II,
Or 70I, 70II),
Book metal wire (60I, 60II, or 70I, 70II)
A method for winding a coil for a small motor, characterized in that the coils are wound around the bobbin (10) while being in contact with each other.