JPH11285189A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure sufficient torque developed by mounting a regulating part regulating the position of a section near the end of an exciting coil in the inside of a bobbin in the diametrical direction on the bobbin, thus increasing the number of turns of the exciting coil. SOLUTION: For example, when the number of turns of an exciting coil 3 is increased to increase torque developed by increasing an ampere turn, the position of a section near an end part 3A is regulated in an opposed space S, and jumping of the bobbin to the outside is prevented. Therefore, the number of turns of the exciting coil 3 can be increased until the outside diameter D1 of the exciting coil 3 is made to approach the outside diameter D2 of the bobbin. If the first regulating part 6A does not exist, the section near the end part 3A is jumped to the outside, therefore the number of turns is limited. After the exciting coil 3 is wound around the bobbin, and the connecting operation of the end part 3A is completed, the bobbin is assembled in a motor case. During including, a substrate 7 on which a socket is mounted is positioned and mounted by using the regulating parts 6A, 6B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exciting coil for driving a rotor wound around the outer periphery of a cylindrical bobbin, and an end of the exciting coil is connected to a connection terminal provided radially outside the bobbin. Related to the motor to be used.

[0002]

2. Description of the Related Art Conventionally, as this type of motor, for example, a stepping motor having a bobbin 21 as shown in FIG. 6 is known. The motor of this example is a two-phase stepping motor driven by unipolar driving. The bobbin 21 in such a motor has a rotor magnet 22 therein.
Are cylindrically arranged so as to be rotatable about an axis O2. A plurality of exciting coils 23 are wound around the bobbin 21, and end portions 23 </ b> A of the exciting coils 23 are provided.
Are connection terminals 24 implanted radially outside the bobbin 21.
Connected to. In the case of the unipolar-driven two-phase stepping motor as in this example, the excitation coil 23 is bifilar-wound two by two on the same magnetic pole, for a total of four windings.

In the motor, a total of eight ends 23 A of the four exciting coils 23 are connected to six connection terminals 24. That is, a total of four ends 23A of the two excitation coils 23 bifilar wound around one magnetic pole are connected to the three connection terminals 24 using one of the three connection terminals 24 as a common terminal. A total of four ends 23A of the two excitation coils 23 bifilar wound around the other magnetic pole are
One of the connection terminals 24 is used as a common terminal and connected to the three connection terminals 24. 25 is a pole tooth formed by the field plate.

[0004]

However, in the above-described conventional motor, the number of turns of the exciting coil 23 is increased as shown by a two-dot chain line in FIG. In this case, the outer diameter D11 of the exciting coil 23 becomes D11 ', and the portion near the end 23A of the exciting coil 23 jumps out of the bobbin 21 as shown by a two-dot chain line in FIG. There was sometimes. When a part of the exciting coil 23 jumps out of the bobbin 21 as described above, the jumping out part is likely to be cut during the motor assembling operation.
In addition, the motor case must be enlarged so as not to come into contact with the protruding portion, or the outer diameter D12 of the bobbin 21 must be increased more than necessary so that the protruding portion is located inside the bobbin 21. There is a problem that the size of the device is increased.

The present invention has been made to effectively solve the above-mentioned problems of the conventional motor, and secures a sufficient generated torque by increasing the number of turns of the exciting coil while reducing the size of the entire motor. It is an object of the present invention to provide a motor that can perform the motor control.

[0006]

According to a first aspect of the present invention, an exciting coil for driving a rotor is wound around an outer periphery of a cylindrical bobbin, and a connection terminal disposed radially outside the bobbin includes: In the motor to which the end of the exciting coil is connected, a regulating portion is provided on the bobbin for regulating the position of the portion near the end of the exciting coil radially inward of the bobbin. . Here, the invention according to claim 2 is characterized in that, in claim 1, a plurality of the regulating portions are formed in a form protruding from the bobbin.

In the motor according to the present invention, the position of the portion near the end of the exciting coil is restricted radially inward of the bobbin by the restriction portion provided on the bobbin. This prevents the portion near the end of the exciting coil from jumping out of the bobbin, thereby reducing the size of the motor as a whole and increasing the number of turns of the exciting coil to secure a sufficient generated torque. Further, by forming a plurality of restricting portions in a form protruding from the bobbin, the position of the portion near the end of the exciting coil is further finely restricted.

[0008]

1 to 5 show an embodiment in which a motor according to the present invention is applied to a unipolar driven two-phase stepping motor. In FIG. 1, reference numeral 1 denotes a cylindrical bobbin incorporated in a motor case indicated by a two-dot chain line in the same figure, and two sets of yokes corresponding to upper and lower pairs of magnetic poles in the same figure are incorporated therein. Have been. As shown in FIG. 3, a rotor magnet (rotor) 2 is provided inside the bobbin 1 so as to be rotatable about an axis O1. The rotor magnet 2 is magnetized so as to have different magnetic poles alternately in the circumferential direction. Reference numeral 3 denotes an exciting coil wound around the bobbin 1. In the case of the unipolar driven two-phase stepping motor shown in the present embodiment, two bifilar coils are wound on the magnetic pole side of the upper yoke in FIG. 1, two bifilars are wound around the magnetic pole side of the lower yoke in FIG. In this way, the exciting coil 3 is wound around the same magnetic pole two by two in total.

A terminal mounting portion 4 is provided on the outside of the bobbin 1 in the radial direction.
Are integrally formed, and a total of six connection terminals 5 projecting radially outward are implanted in the terminal mounting portion 4. Then, similarly to the conventional example shown in FIG. 6, a total of eight ends 3A of the four excitation coils 3 are connected to these six connection terminals 5. That is, a total of four ends 3A of the two exciting coils 3 bifilar-wound on one magnetic pole side are connected to the three connection terminals 5 using one of the three connection terminals 5 as a common terminal, Similarly, a total of four ends 3A of the two excitation coils 3 bifilar wound on the other magnetic pole side are connected to the three connection terminals 5 by using one of the other three connection terminals 5 as a common terminal. Connected. The ends 3A of the two exciting coils 3 wound bifilarly on the lower magnetic pole side in FIG. 1 are guided by notches 1A formed in the outer peripheral portion of the bobbin 1 and correspond to the ends, as shown in FIG. It is led to the connection terminal 5.

The terminal mounting portion 4 has a curved surface 4A as shown in FIGS. 4 and 5, and the end 3A of the exciting coil 3 is guided along the curved surface 4A. Further, the terminal mounting portion 4 includes two plate wall-shaped first restricting portions 6A protruding on both sides of the curved surface 4A, and a curved surface 4A.
Cylindrical second restricting portions 6B protruding from the intermediate position of
Is provided. These restricting portions 6A and 6B are formed integrally with the terminal mounting portion 4 and the bobbin 1, and restrict the position of a portion near the end 3A of the exciting coil 3 as described later.

In FIG. 5, reference numeral 7 denotes a substrate to which a socket 8 is attached, on which a land 7A to be soldered after the tip of the connection terminal 5 is inserted is formed. 8 connection pins 8A. In the motor of the present embodiment, the socket 8 is provided with five connection pins 8A, and of the six connection terminals 5, two of the six connection terminals 5 serving as common terminals as described above are connected to one connection pin 8A. They are commonly connected, and each of the other four is connected to the other four connection pins 8A.

Such a substrate 7 is positioned between the outer peripheral portion of the bobbin 1 and the terminal mounting portion 4. That is, the positioning hole 7B on the substrate 7 and the positioning protrusion 4B on the terminal mounting portion 4 are fitted, and the notch 8B on the socket 8 and the positioning protrusion 1B on the bobbin 1 are fitted. Further, the first restricting portion 6A is provided at the corner 8C of the socket 8.
And the substrate 7 is placed on the second restricting portion 6B. As described above, the first and second restricting portions 6A and 6B
It also has a function for positioning the board 7 and the socket 8. In FIG. 3, reference numeral 9 denotes pole teeth formed by the field plate.

Next, the operation of the motor having the above configuration will be described. First, when assembling the motor, at the start and end of winding of the exciting coil 3 around the bobbin 1, the end 3A is connected to the corresponding connection terminal 5
And then soldered to the connection terminal 5. At the time of connection of the end 3A of the exciting coil 3, as shown in FIG. 3, the end 3A passes through the opposing interval S between the two left and right first restricting portions 6A. Thereby, the portion near the end 3A of the exciting coil 3 is opposed to the facing space S
Is restricted so as not to protrude outward, and the position is further restricted by the second restriction portion 6B within the opposing interval S.

As a result, for example, when the number of turns of the exciting coil 3 is increased in order to increase the generated torque by increasing the ampere turn, regardless of the increase in the number of turns, the portion near the end 3A is not affected. Is regulated within the facing distance S, and the bobbin 1 is prevented from jumping out. Therefore, the outer diameter D1 of the exciting coil 3 is
The number of turns of the exciting coil 3 can be sufficiently increased until the outer diameter approaches D2. For example, the first restricting unit 6A
When there was no, as shown by a two-dot chain line in FIG.
Since the portion near the end 3A of the exciting coil 3 protrudes outside the bobbin 1, the number of turns of the exciting coil 3 is limited.

After the exciting coil 3 is wound around the bobbin 1 and the connection work of the end 3A is completed,
The bobbin is assembled in a motor case indicated by a two-dot chain line in FIG. Before and after the assembly, the board 7 to which the socket 8 is attached is positioned using the regulating portions 6A, 6B and the like, and then attached. The present invention can be widely applied to various types of motors. In addition, at least one restricting portion may be provided, and the shape of the restricting portion is arbitrary. In short, it is only necessary to prevent the portion near the end 3A of the exciting coil 3 from jumping out of the bobbin 1.

[0016]

As described above, claims 1 and 2
According to the invention described in the above, by providing on the bobbin around which the exciting coil is wound a regulating portion that regulates the position of the portion near the end of the exciting coil to the radial inside of the bobbin, the portion near the end of the exciting coil is As a result, it is possible to prevent the bobbin from jumping out of the bobbin. As a result, it is possible to increase the number of turns of the exciting coil and secure a sufficient generated torque while reducing the size of the entire motor. According to the second aspect of the present invention, by forming a plurality of restricting portions in a form protruding from the bobbin, the position of the portion near the end of the exciting coil can be more finely restricted.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing one embodiment of the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is an enlarged view as viewed from the direction of arrow IV in FIG. 3;

FIG. 5 is an enlarged perspective view of a peripheral portion of a terminal mounting portion in FIG.

FIG. 6 is a sectional view of a main part of a conventional motor.

[Explanation of symbols]

 Reference Signs List 1 bobbin 2 rotor magnet (rotor) 3 excitation coil 3A end 4 terminal mounting part 5 connection terminal 6A first regulating part 6B second regulating part

[Procedure amendment]

[Submission date] February 2, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

According to a first aspect of the present invention, an exciting coil for driving a rotor is wound around an outer periphery of a cylindrical bobbin, and a connection terminal disposed radially outside the bobbin includes: The end of the excitation coil is connected, and the connection end is
To the socket of the socket attached to this board via the board
In the motor to which the connecting pin is connected ,
The position of the portion near the end of the exciting coil is restricted to the radial inside of the bobbin, and the substrate and the socket
And a regulating portion for positioning the unit. Here, the invention described in claim 2 corresponds to claim 1
, Wherein a plurality of the restricting portions are formed so as to protrude from the bobbin.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

In the motor according to the present invention, the position of the portion near the end of the exciting coil is restricted radially inward of the bobbin by the restriction portion provided on the bobbin. This prevents the portion near the end of the exciting coil from jumping out of the bobbin, thereby reducing the size of the motor as a whole and increasing the number of turns of the exciting coil to secure a sufficient generated torque. Further, by forming a plurality of restricting portions in a form protruding from the bobbin, the position of the portion near the end of the exciting coil is further finely restricted. In addition, by the regulation part, the board and socket
Is positioned.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

[0016]

As described above, claims 1 and 2
According to the invention described in the above, by providing on the bobbin around which the exciting coil is wound a regulating portion that regulates the position of the portion near the end of the exciting coil to the radial inside of the bobbin, the portion near the end of the exciting coil is As a result, it is possible to prevent the bobbin from jumping out of the bobbin. As a result, it is possible to increase the number of turns of the exciting coil and secure a sufficient generated torque while reducing the size of the entire motor. In addition, the regulation section allows
And the socket can be positioned. According to the second aspect of the present invention, by forming a plurality of restricting portions in a form protruding from the bobbin, the position of the portion near the end of the exciting coil can be more finely restricted.

Claims (2)

[Claims] 1. A motor in which an excitation coil for driving a rotor is wound around an outer periphery of a cylindrical bobbin, and an end of the excitation coil is connected to a connection terminal disposed radially outside the bobbin. A motor, wherein the bobbin is provided with a regulating portion for regulating a position near an end of the exciting coil to a radially inner side of the bobbin. 2. The motor according to claim 1, wherein a plurality of the regulating portions are formed in a form protruding from the bobbin.