JPH054775U - motor - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the positioning when mounting the stator coil and improve the productivity of the stator. Also, the amount of stator yoke material used is reduced. [Structure] A resin substrate 11 having concave portions 15, 15, ..., 15 is provided, and at least a part of the stator coils 8, 8, ..., 8 connected to the resin substrate 11 by a circuit pattern 9 is embedded and the stator yoke 7 is provided. To fix the stator 2
, 8 and the positioning of the stator coils 8, 8, ..., 8 is determined by inserting them into the recesses 15, 15 ,.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a motor. More specifically, the present invention is a disk-shaped rotor and a spin. Suitable for flat motors with axial flux flow facing the data Motor structure.

[0002]

[Prior art]

  A flat motor, such as a key, in which a coil and a magnet are arranged in a plane and face each other. In the case of a capstan motor, as shown in FIG. Is a flat iron plate substrate that also serves as a stator yoke (hereinafter referred to as a stator yoke plate) It is mounted on a flat wiring board 109 above 108 and fixed in a predetermined positional relationship. Has been. For example, use a dedicated jig for the wiring board 109 on the stator yoke plate 108. The coils are arranged in a fixed positional relationship with each other, and It is fixed by soldering or the like. Also, although not shown, In some cases, a wiring circuit is formed directly on the stator yoke plate and a dedicated jig is placed on top of it. It is used to fix the coil directly. In the figure, reference numeral 101 is a rotor, 1 02 is a stator, 103 is a bearing holder, 104 is a rotor magnet, and 105 is a rotor. Data shaft, 106 is a magnet yoke, 110 is a set screw, and 111 is a bearing sleeve. Reeve.

[0003]

[Problems to be solved by the device]

  However, in the case of this conventional motor structure, a flat substrate 1 is formed using a dedicated jig. Since the individual coils 107 are positioned on the 09 and then fixed, the productivity is low. Become. Further, the stator yoke plate 108 is used as a substrate for the stator coil 107 and the shaft. Since the receiving holder 103 is supported, there is no freedom in the yoke shape and it is expensive. It was not possible to reduce the amount of material used for the yoke. That is, the stator coil 10 7 is a conventional stay that also serves as a stator yoke and a substrate that supports the bearing holder 103 and the like. According to the stator structure, the stator yoke plate 108 has It is originally necessary to support not only the vicinity but also the wiring circuit and the bearing holder 103. It has been extended to areas that cannot be covered.

[0004]   The present invention facilitates positioning of the coil on the base plate of the stator to improve productivity. A first object of the present invention is to provide a motor structure that can be used. In addition, the present invention The shape of the data yoke plate has flexibility to reduce the amount of yoke material used. The second object is to provide a motor structure that enables cost reduction and weight reduction. And

[0005]

[Means for Solving the Problems]

  To achieve such an object, the present invention has a rotor magnet and a rotary shaft. The rotor, the bearing that supports the rotating shaft, and the rotor magnet that faces the rotor magnet. In a motor having a stator having a data coil, Embedded in at least a part of the stator coil in the rotation axis direction. Resin board and circuit pattern provided on the resin board and connected to the stator coil On the side opposite to the stator coil with respect to the rotation axis direction of the resin substrate. It is composed of a stator yoke attached.

[0006]

[Action]

  Therefore, by fitting the stator coil into the recess of the resin substrate, Are placed in position and the coils are fixed on the stator with a certain positional relationship .

[0007]

【Example】

  Hereinafter, the configuration of the present invention will be described in detail based on the embodiments shown in the drawings.

[0008]   1 to 3 show an embodiment of the motor of the present invention. This motor is a rotor magnet A rotor 1 in which a stator 4 is arranged in a plane and a stator 1 in which a stator coil 8 is arranged in a plane. A bearing holder 3 that rotatably supports the data 2 and the rotor 1, The disk-shaped rotor 1 and the stator 2 are provided so as to be coaxially opposed to each other. ing. The rotor 1 includes a thin plate ring-shaped magnet 4, a magnet yoke 5 and The rotor shaft 6 is included. The stator 2 is a disk-shaped yoke 7. And a resin substrate 11 and a stator coil 8 arranged on the It

[0009]   The resin substrate 11 fixes the stator coil 8 and holds the stator yoke 7. Together with the wiring board that forms the circuit pattern 9, a thermosetting resin is preferable. More preferably, it is integrally formed with the bearing holder 3 using heat-resistant engineering plastic. Is shaped. The stator yoke 7 is attached to the back side of the resin substrate 11 by, for example, adhesion. Therefore, it is fixed. As the yoke material, iron plate or plated steel plate, silicon steel It is possible to use a plate or nickel.

[0010]   The stator coil 8 is mounted on the resin substrate 11 together with the circuit pattern 9. It In the case of this embodiment, the recess 15 into which the stator coil 8 is fitted is previously inserted. The circuit pattern 9 is formed by plating on the surface side of the resin substrate 11 formed at the time of molding Then, by fitting the stator coil 8 into the recess 15, the position of the stator coil is It is configured so that the determination, the fixing and the tangent can be performed at the same time.

[0011]   The stator coil 8 includes a plurality of coils 8_a, 8_b, 8_c, ..., 8_fConsists of The fixed coils are connected to each other by the circuit pattern 9. For example, shown in FIG. So that the coil 8_aInner terminal and coil 8_dThe outer terminal of the circuit is made of copper foil. Turn 9_adBy also coil 8_bInner terminal and coil 8_eThe outer terminal of Road pattern 9_beBy, and coil 8_c, 8_d, 8_eEach inner terminal of each other Circuit pattern 9_cdeAnd then coil 8_fInner terminal and coil 8_cWith the outer terminal of Circuit pattern 9_cfAre connected respectively. Also, the coil 8_a, 8_bas well as 8_fEach outer terminal of the terminal 10 is connected to a drive circuit (not shown) of the motor._a , 10_b, 10_fIs drawn to the peripheral edge of the resin substrate 11. The terminal 10 _a , 10_b, 10_fOn the front surface side or the back surface side of the resin substrate 11 as shown in FIG. It may be formed, or the outer peripheral surface of the resin substrate 11 is partially cut out to form a terminal portion there. May be. As the coil 8, for example, a slice coil made by winding, that is, a width Adhere a predetermined number of winding coils that are made by alternately winding a wide conductive foil and insulating foil. Integrated and then sliced to a thickness of 0.6 to 0.8 mm using a flat coil. Is preferred.

As shown in FIG. 3, when the coil 8 _e is used as an example of the connection between the coil 8 _e and the circuit pattern 9, the outer terminal 8 _e1 of the coil 8 _e and the terminal 9 ₁ of the circuit pattern 9 _be are connected. and a terminal 9 _second inner terminal 8 _e2 and the circuit pattern 9 _ae of the coil 8 _e is, the coil 8 _e is performed by contacting each other by being pushed into the recess 15 of the resin substrate 11. At this time, in order to secure more reliability, a conductive paste may be applied to each terminal when the coil is press-fitted.

[0013]   Resin sleeves 12 and 12 are press-fitted into the bottom and the top of the bearing holder 3, respectively. The rotor sleeve 6 is rotatably supported by the resin sleeves 12, 12. It is provided. A part of the bearing holder 3 is notched to form a window 13 on the peripheral surface. The rotor shaft 6 is exposed so that it can be used as a capstan. Has been.

[0014]   The motor configured as described above is manufactured as follows.

[0015]   First, as shown in FIG. 4, for example, the resin substrate 11 and the bearing holder 3 to be the wiring substrate are shown. It is integrally molded by injection molding using various injection molding dies 16 and 17. At this time, Examples of the injection molding material include liquid crystal polymer (LCP) and polyphenylene sulph. Guide (PPS), polyallyl sulfone (PAS), polyetherimide (P EI), polyether sulfone (PES), polysulfone (PSF), poly Heat-resistant engineering materials such as arylate (PAR) and polyamide-imide (PAI) Those that are plastic and have solder resistance are preferred. This injection At the time of molding, the concave portion 15 for fitting the stator coil 8 into the convex portion 20 of the upper mold 16. Then, the resin substrate 11 is simultaneously molded. The recess 15 is slightly smaller than the stator coil 8. It is formed with a minus tolerance that makes the area small, and by pressing the stator coil 8 It is formed so that it can be fitted. As a result, the stator coil 8 is It can be firmly fixed to the substrate 11.

[0016]   Next, the injection molded product is taken out from the injection molds 16 and 17, and then the resin substrate Wiring of accessories such as stator coil 8 and Hall element (not shown) on the surface side of 11 The circuit pattern 9 for is formed by, for example, the photoadditive method. photo In the additive method, the surface of the injection molded product, that is, the resin substrate 11 is electroless plated, After applying a resist to it, a predetermined circuit pattern is exposed, developed, and etched. Circuit pattern by leaving the plating only on the desired circuit pattern 9 is formed.

[0017]   After forming the circuit pattern 9, fit the stator coil 8 into the recess 15 of the resin substrate 11. In addition, it is equipped with necessary accessories such as Hall elements, and can be passed through a reflow furnace. Are manually soldered to the circuit pattern 9 to be mounted. Then the stator yaw The stator 7 is assembled by bonding the blade 7 to the back surface of the resin substrate 11 using an adhesive or the like. Further, the bearing holder 3 has a resin slide with good slidability for supporting the rotor shaft 6. The leaves, for example, Teflon sleeves 12, 12 are press-fitted in at least two places.

[0018]   FIG. 5 shows another embodiment. In this embodiment, the stator coil 8 is inserted in the resin substrate 11. The recess 15 for inserting and the recess 18 for inserting the stator yoke 7 are formed by injection molding. And the stator coil 8 and the stator yoke 7 are press-fitted into the resin substrate 11. These are held by the resin substrate 11. In the case of this embodiment, Since the data yoke 7 need only be provided below the stator coil 8, the minimum yaw It can be reduced to the material. It should be noted that the stator yoke 7 is recessed after the resin substrate 11 is injection molded. Although it may be press-fitted into the portion 18, it is set in the injection molding die 17 in advance and inserted. It may be integrally molded with the resin substrate 11 by sheet molding. Also, the circuit pattern A frame material is adopted for the turn 9, and the resin board 1 is formed by insert molding. It may be embedded in the surface of the substrate including the first concave portion 15. As circuit frame material For example, copper foil, nickel silver foil stamped into a specified shape by stamping, or It is possible to use those that have been formed into a desired wiring pattern by etching, plating, etc. is there.

[0019]   The above-mentioned embodiment is an example of the preferred embodiment of the present invention, but is not limited to this. However, various modifications can be made without departing from the scope of the present invention. An example For example, although not shown, a resin plate having holes for accommodating the stator coil 8 and the holes The resin substrate 11 having the concave portion 15 is manufactured by laminating the resin substrate without You may do it. The holes for accommodating the stator coil in the resin plate are not particularly limited. Although not specified, it is preferable that the outer shape of the slice section of the stator coil is It is a hole that has a slightly smaller minus intersection, and can be used for punching or injection molding. Therefore, it is provided. In this case, the resin plate without holes and the bearing holder are integrally injection molded. Common to each other, and only the resin plate with holes is used for the size, number and arrangement of the stator coils. It is also possible to make various types according to the requirements.

[0020]   Further, when the bearing holder 3 and the resin substrate 11 are integrally molded with the same resin material, It is not particularly limited to the case, molded as a separate body and fixed by screwing if necessary, They may be integrated by insert molding. In this case, the bearing holder is aluminum It can be formed from a metal such as aluminum alloy or brass. Also, for insert molding In this case, in order to increase the adhesive force between the bearing holder 3 and the resin substrate 11, the flange part is attached to the bearing holder. It is preferable to form the groove.

[0021]   In addition, the method for molding the resin substrate 11 is not particularly limited to the above-mentioned method. For example, by using a two-color molding method, the circuit wiring part is made of a catalyst-added resin that facilitates electroless plating. By molding and then molding the substrate insulating portion around it You may get

[0022]   Further, although not shown in the drawing, wiring wiring is provided on the stator yoke 7 on the rear surface side of the resin substrate 11. A through hole is formed in the resin substrate 11 to form a path and reach the wiring circuit. If so, the Hall element and the like are also embedded in the resin substrate 11 and then arranged on the stator yoke 7. Enables three-dimensional wiring connected to a line pattern.

[0023]   Although not shown, a thermosetting resin is used for the resin substrate 11 of FIG. When the resin substrate 11 has been cured to some extent, the circuit frame and the stay are not completely cured. Insert the stator yoke and then embed the stator coil before The plate may be completely cured. That is, the injection molds 16 and 17 of FIG. Set the circuit frame and the stator yoke 7 in advance, and set the thermosetting After injecting the resin, heat it until it becomes a semi-cured state. And it becomes a semi-cured state When taking out, remove it from the molds 16 and 17 and place the coil on the circuit frame and rotate it. Connect the wiring frame and coil with solder, and then uncured the stator coil with uncured resin. The coil is embedded by applying heat to the resin substrate while pressing it into the substrate. In this state, the resin substrate is completely cured. Of course, the circuit pattern should be frame-free It is also possible to directly form it on the resin substrate by plating or the like.

[0024]   Further, the fluorinated resin substrate 11 on which the bearing holder 3 is integrally formed is attached to Do not apply heat with a press mold after covering it with a release sheet such as Tylene (trade name: Teflon). In some cases, the resin substrate is subjected to pressure molding to form the coil insertion recess. This carp As shown in FIG. As described above, a wiring routing circuit is formed by the above-mentioned plating method or etching method, Alternatively, fix the circuit frame by insert molding or press fitting, and When the coil 8 is press-fitted, the coil 8 is firmly fixed and each of the inside and outside of the coil is fixed. The terminals and the circuits are connected by being pressed against each other.

[0025]   Also, instead of the above-mentioned release sheet, lilyzagen, die-free 541 (trade name) Pressurize the coil insertion recess 15 with a silicone-based or fluorine-based release agent. You may heat-cure after shaping | molding.

[0026]   In addition, the circuit pattern has a stator coil and stator yoke that are press-fitted or inserted. Between the surface of the resin substrate 11 integrated by molding and the exposed coil surface It is also possible to form wiring by plating, etching, printing, etc. It is possible. In this case, make sure that the wiring terminals of the coil body are not covered with resin and solder It is preferable to float the paste to a level where screen printing is possible. So After that, screen print solder paste and connect the coil body and circuit by reflow. Do the line.

[0027]

[Effect of device]

  As is clear from the above description, the motor of the present invention uses the resin substrate having the recess. At least one of the stator coils that is provided and is connected to this resin substrate with a circuit pattern. Since the part is embedded and the stator yoke is fixed, the stator is constructed. The positioning of the stator coil is determined by inserting it into the recess, and a jig or the like is used. The coil can be positioned without doing so and productivity is improved.

[0028]   Moreover, the motor of the present invention uses a resin substrate to form a stator coil and a stator yaw. Since the stator set is configured by holding the brackets, etc., the shape of the stator yoke is not restricted. Since it does not receive it, it is possible to use the yoke material only for the originally required parts. The amount used can be reduced, cost can be reduced, and motor weight can be reduced.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment of a motor of the present invention.

FIG. 2 is a diagram showing an example of a stator of the motor of the present invention,
(A) is a plan view and (B) is an enlarged sectional view taken along line II-II of (A).

FIG. 3 is a perspective view showing a relationship between a coil insertion recess formed in a resin layer and a coil attached to the recess.

FIG. 4 is a schematic sectional view showing an example of an injection molding die for molding the resin substrate of the motor of the present invention.

FIG. 5 is an enlarged sectional view of an essential part showing another embodiment of the motor of the present invention.

FIG. 6 is a central longitudinal sectional view showing an example of a conventional capstan motor.

[Explanation of symbols]

1 rotor 2 stator 3 Bearing holder 4 rotor magnet 6 Rotor shaft (rotating shaft) 7 Stator yoke 8 Stator coil 9 circuit pattern (circuit frame) 11 Resin substrate

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Creator Taiji Matsuyama             14-888 Ako Stock Market, Komagane City, Nagano Prefecture             Company Sankyo Seiki Seisakusho Komagane Factory (72) Creator Shinichi Niwa             14-888 Ako Stock Market, Komagane City, Nagano Prefecture             Company Sankyo Seiki Seisakusho Komagane Factory

Claims (2)

[Scope of utility model registration request] 1. A motor comprising: a rotor having a rotor magnet and a rotating shaft; a bearing for bearing the rotating shaft; and a stator having a stator coil arranged so as to face the rotor magnet. Is a resin substrate in which at least a part of the stator coil in the rotation axis direction is embedded, a circuit pattern provided on the resin substrate and connected to the stator coil, and the stator in the rotation axis direction of the resin substrate. A motor comprising a stator yoke mounted on the opposite side of the coil. 2. The motor according to claim 1, wherein the bearing holder portion of the resin substrate is integrally formed by injection molding.