JP5101935B2 - Motor stator - Google Patents

Description

 The present invention relates to a motor, and more particularly to the configuration of a stator of a motor.

  In various devices or equipment, motors usually play a vital role. For example, driving a large turbine or driving a train is completed with a motor. In recent years, motors are widely applied to electronic products such as digital cameras and mobile phone cameras. Since the electronic products described above are increasingly developed to miniaturization, the structure of the motor used in the electronic products must be improved. Since the stepping motor has a characteristic that the angle of rotation can be easily controlled, it is always used in the electronic product.

  In the stepping motor, a metal coil is wound on an iron core of the stator to form a magnetic field that rotates the motor. An electrical connection pin is provided at the end of the metal coil to provide current to the coil wound on the stator core. The electrical connection pins are usually electrically connected to an external power source via a pin holder. The pin holder is manufactured by injection molding of a plastic material. The pin holder is provided with a plurality of insertion ports for inserting the electrical connection pins. When the motor is used, after inserting the electrical connection pin connected to the end of the metal coil into the pin holder and then connecting the pin holder to an external power source, an external current flows into the metal coil. From this, the motor can rotate.

  As described above, after the electrical connection pin is inserted into the pin holder, the motor is driven by electrically connecting the pin holder to an external power source. However, since the size of the motor is very small, it is difficult to accurately insert the electrical connection pins into the corresponding insertion holes of the pin holder in the process of producing and assembling the motor. As a result, the contact of the electrical connection terminal deteriorates or the electrical connection terminal falls, which affects the product function and the yield rate. In addition, since the pin holder needs to be manufactured, there is a problem that the manufacturing process is complicated.

  In view of the above problems, a motor stator having a simple function and a stable function is provided.

In a motor stator including at least one pole piece set for winding a coil, the pole piece set includes an upper pole piece unit and a lower pole piece unit, and each pole piece unit is an annular shape provided with a hole. A plurality of pole pieces extending from the periphery of the body and the annular piece body, a space for accommodating a rotor is formed in the center of the pole piece set, and the pole piece unit is integrally formed, A terminal for electrically connecting the coil and the power source is formed.

A stator of a motor, including a pole piece set including an upper pole piece unit and a lower pole piece unit, and a coil wound around the pole piece set, each pole piece unit having an annular body provided with a hole And a plurality of pole pieces extending vertically from the periphery of the annular body, the pole pieces of the upper pole piece unit and the pole pieces of the upper pole piece unit are meshed so as to cross each other, and the coil is wound A space for accommodating a rotor is formed in the center of the pole piece set, and one pole piece set of the pole piece set is formed integrally with the coil and the power source. Two terminals for electrical connection are formed.

  As described above, by integrally manufacturing the terminal and the pole piece unit, the manufacturing process can be simplified, the function of the product can be stabilized, and the production cost can be reduced.

 Hereinafter, the configuration of a specific embodiment according to the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, the motor stator of the present invention can be applied to a small DC brushless motor and a stepping motor. The stator includes two pole piece sets 30a and 30b that are vertically overlapped. The pole piece sets 30a and 30b are annular bodies, and a hollow space 40 for accommodating a rotor (not shown) is formed at the center.

 The pole piece set 30a includes an upper pole piece unit 10a and a lower pole piece unit 20a installed opposite to each other, and the pole piece set 30b includes an upper pole piece unit 10b and a lower pole piece unit 20b installed opposite to each other. The upper pole piece units 10a and 10b and the lower pole piece units 20a and 20b are all made of a magnetic material, for example, iron.

 The upper pole piece unit 10a includes an annular body 12a and a plurality of pole pieces 16a, and the upper pole piece unit 10b includes an annular body 12b and a plurality of pole pieces 16b. Circular holes 14a and 14b are formed in the centers of the annular bodies 12a and 12b, respectively. The plurality of pole pieces 16a and 16b are formed by extending vertically from the inner edges of the annular bodies 12a and 12b toward the lower pole piece units 20a and 20b, respectively.

 The structure of the lower electrode piece units 20a and 20b is similar to the structure of the upper electrode piece units 10a and 10b. The lower pole piece unit 20a includes an annular body 22a and a plurality of pole pieces 26a, and the lower pole piece unit 22b includes an annular body 22b and a plurality of pole pieces 26b. The sizes of the annular bodies 22a and 22b are the same as the annular bodies 12a and 12b of the upper pole piece units 10a and 10b. Circular holes 24a and 24b are formed in the centers of the annular bodies 22a and 22b, respectively. The pole pieces 26a and 26b are formed by extending vertically from the inner edges of the annular bodies 22a and 22b to the upper pole piece units 10a and 10b, respectively.

 Two terminals 23a are formed on the annular body 22a of the lower pole piece unit 20a, and two terminals 23b are formed on the annular body 22b of the lower pole piece unit 20b. The terminals 23a and 23b are rectangular pillars extending in the radial direction from the outer edges of the annular bodies 22a and 22b of the lower pole piece units 20a and 20b, and formed integrally with the lower pole piece units 20a and 20b, respectively. is there. The two terminals 23a are arranged in parallel with each other so as to have a certain distance therebetween, and the two terminals 23b are also arranged in parallel with each other so as to have a certain distance between them.

 When assembling the stator, the upper pole piece unit 10a and the lower pole piece units 10a and 20a are assembled so as to face each other. Then, a constant interval is formed between the annular body 12a and the annular body 22a, and the pole piece 16a and the pole piece 26a are meshed with each other along the circumferential direction. That is, between the annular body 12a and the annular body 22a, the pole piece 16a and the pole piece 26a are engaged with each other to form a cylindrical body 60 on which a coil can be wound. Thereafter, the coil is wound around a recess formed by the annular body 12a, the annular body 22a, and the cylindrical body 60.

 In accordance with the same principle, the lower electrode piece set 30b is mounted so that the upper electrode piece unit 10b and the lower electrode piece unit 20b face each other. Then, a constant interval is formed between the annular body 12b and the annular body 22b, and the pole piece 16b and the pole piece 26b are meshed with each other along the circumferential direction. That is, between the annular body 12b and the annular body 22b, the pole piece 16b and the pole piece 26b are engaged with each other to form another cylindrical body 60.

 When the upper pole piece set 30a and the lower pole piece set 30b are assembled so as to face each other, the lower pole piece unit 20a and the lower pole piece unit 20b are connected to each other in the middle portion of the stator, and the upper pole piece unit 10a and the upper pole piece unit 10b are connected to each other. The pole piece units 10b are respectively located at both ends of the stator. That is, the upper pole piece unit 10a, the lower pole piece unit 20a, the lower pole piece unit 20b, and the upper pole piece unit 10b overlap in the order described. The four terminals 23 are arranged in parallel with each other so that there is a fixed interval therebetween.

 As shown in FIG. 3, the upper pole piece unit 10a, the lower pole piece unit 20a, the lower pole piece unit 20b, and the upper pole piece unit 10b can be integrated by a method of insert molding. That is, the stator is mounted in a mold, and a plastic material is formed between the cylindrical shape 60 between the upper pole piece unit 10a and the lower pole piece unit 20a, and between the upper pole piece unit 10b and the lower pole piece unit 20b. Enter into the cylindrical shape 60. Then, since the plastic material is filled between the upper pole piece 16a, the lower pole piece 26a, the lower pole piece 16b, and the upper pole piece 26b arranged in an intersecting manner, the pole piece units 10a, 10b, 20a, 20b are fixed to each other. A complete stator is then formed.

A space for accommodating the rotor is formed at the center of the stator. The coils are wound on the two cylindrical shapes 60, respectively. When the terminal of the coil is connected to the terminal 23 via an insulating rubber or the like attached to the terminal 23 and the terminal 23 is electrically connected to an external power source, a current of the power source flows through the coil.

 Although the stator of this embodiment includes two overlapping pole piece sets 30a and 30b, the quantity of the pole piece sets can be varied according to actual demand.

 As described above, the four terminals 23 include the terminal 23a formed on the annular body 22a of the lower pole piece unit 20a and the terminal 23b formed on the annular body 22b of the lower pole piece unit 20b. After the assembly, the lower electrode piece unit 20a and the lower electrode piece unit 20b are connected to each other, so that the terminal 23a of the lower electrode piece unit 20a and the terminal 23b of the lower electrode piece unit 20b come close to each other.

 Whether the two terminals 23a of one pole piece unit 20a are bent toward the other pole piece unit 20b so that the four terminals are placed on one plane for easy connection to an external power source The two terminals 23b of the pole piece unit 20b can be bent toward the other pole piece unit 20a so that the four terminals are placed on one plane. Alternatively, the two terminals 23a of the pole piece unit 20a are bent toward the pole piece unit 20b, and the two terminals 23b of the other pole piece unit 20b are bent toward the pole piece unit 20a. The terminals can be placed on one plane.

 When the space is sufficient, the terminals 23a and 23b may be provided in the upper pole piece units 10a and 10b, respectively. Alternatively, the terminal 23a is provided on the upper pole piece unit 10a (or 10b) of the one pole piece set 30a (or 30b), and the terminal 23b is provided on the lower pole of the other pole piece set 30b (or 30a). You may provide in the piece unit 20b (or 20a). Alternatively, the four terminals 23 may be provided in the upper pole piece unit 10a, the upper pole piece unit 10b, the lower pole piece unit 20a, and the lower pole piece unit 20b, respectively. That is, even if one terminal is provided for each of the upper pole piece unit 10a, the upper pole piece unit 10b, the lower pole piece unit 20a, and the lower pole piece unit 20b, the same effect can be achieved.

 The two lower pole piece units 20a and the lower pole piece unit 20b can be integrally formed. That is, the annular body 22a of the lower pole piece unit 20a and the annular body 22b of the lower pole piece unit 20b can be integrally formed. At this time, as shown in FIG. 4, the four terminals 23 are provided on the outer edge of the annular body integrally formed with the two lower pole piece units.

 When the terminal 23a is formed integrally with the lower pole piece unit 20a and the terminal 23b is formed integrally with the lower pole piece unit 20b, there are the following advantages.

 If the terminal 23a is formed integrally with the lower pole piece unit 20a and the terminal 23b is formed integrally with the pole piece unit 20b, it is not necessary to use a pin holder, and it is necessary to insert an electric conductive pin into the pin holder. Because there is no, the manufacturing process is simplified.

 Since there is no need to insert an electrical conductive pin into the pin holder, the electrical connection pin can be reliably connected even if the motor is small in size. That is, it is possible to prevent the electrical connection pin from falling due to incorrect insertion of the electrical conductive pin and the contact of the electrical connection pin being deteriorated. Therefore, the yield rate of products can be increased, the manufacturing process can be simplified, and the production cost can be reduced.

It is a three-dimensional exploded view of the stator of the motor according to the first embodiment of the present invention. FIG. 2 is an assembly diagram of the stator shown in FIG. 1. FIG. 3 is an overhead view of the stator shown in FIG. 2. It is a three-dimensional exploded view of the stator of the motor according to the second embodiment of the present invention.

Explanation of symbols

10a Upper pole piece unit 10b Upper pole piece unit 12a Ring body 12b Ring body 22a Ring body 22b Ring body 14a Hole portion 14b Hole portion 24a Hole portion 24b Hole portion 16a Pole piece 16b Pole piece 26a Pole piece 26b Pole piece 20a Lower pole piece Unit 20b Lower pole piece unit 23 terminal 23a terminal 23b terminal
30a Upper pole piece set 30b Lower pole piece set 40 Hollow space 60 Cylindrical body

Claims (3)

In a stator of a motor that includes two pole pieces that overlap each other to wind a coil,
Each of the pole piece sets includes an upper pole piece unit and a lower pole piece unit,
Each pole piece unit includes an annular body provided with a hole and a plurality of pole pieces extended from the periphery of the annular body,
In the center of the pole piece set, space for accommodating the low te is formed,
Two adjacent pole piece units in the two pole piece sets are connected to each other;
The said two pole pieces units connected to each other, respectively are formed integrally, the two pin for electrically connecting the coil and the power supply are formed,
The terminals are arranged in parallel with each other so as to have a certain interval,
In the two pole piece units connected to each other, the two terminals of at least one of the pole piece units are bent toward the other pole piece unit so that the four terminals are placed in one plane. wherein the is, the motor stator. When the upper pole piece unit and the lower pole piece unit are mounted so as to face each other,
A plurality of pole pieces of the upper pole piece unit and a pole piece of the lower pole piece unit are meshed with each other along the circumferential direction,
2. The motor stator according to claim 1, wherein a cylindrical shape for winding the coil is formed between the upper pole piece unit and the lower pole piece unit. 3.   The stator of a motor according to claim 1, wherein the pole piece extends vertically from an inner edge of the annular body, and the terminal extends radially from an outer edge of the annular body.

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