JPH04137451U - thin coil - Google Patents

Abstract

(57) [Summary] [Purpose] When mounting a thin coil using a board made of molded resin, it is possible to eliminate the need for screws, prevent wasted space, and make the motor smaller and thinner. Provides thin coils. [Structure] A plurality of recesses 3 that match the shape of the coil 6 are formed in a substrate 2 made of molded resin, the coil 6 is inserted into each recess 3, and a metal is placed inside the substrate 2 having a hole 7 in the center. Fix the ring 14. A wiring pattern may be provided on the substrate 2. The stator substrate 11 may be stacked on the substrate 2, and the inner diameter of the stator substrate and the inner diameter of the metal ring 14 may be made equal.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to thin coils, such as surface-facing brushless motors. It is applicable to

0002

[Conventional technology]

The surface facing brushless motor is a motor suitable for flattening, and the surface facing brushless motor is suitable for flattening. In order to flatten the data more effectively, efforts are being made to make the coil thinner. coil A sliced coil is an effective means of reducing the thickness of the device. slice coil An example is the one described in JP-A-61-73552. First, this is one-sided Copper foil coated with insulating resin is wrapped around the core with the help of an adhesive. After the adhesive between the layers of foil has hardened, the core is pulled out and then placed in a predetermined number of molds. Positioned in the circumferential direction and integrally molded with resin, then cut into rounds to the specified width. By doing so, a thin coil can be obtained.

0003 Figures 3 and 4 show the case where the above-mentioned thin coil is applied to a capstan motor. An implementation example is shown. By being integrally molded and cut into rings as described above, The sliced coil 31 made of Since it lacks strength and strength, it is mounted on the stator board 34 using screws. More specifically, the slice coil 31 and the stator board 34 are arranged so that their center holes are aligned. The bearing holder 35 is further placed on the stator board 34. Position them so that their central axes match and overlap them, and connect them to the slice coil 31. Screw the screw 37 that has passed through the data base plate 34 into the flange portion of the bearing holder 35. As a result, the slice coil 31, stator board 34, and bearing holder 35 are integrated. ing.

0004 As shown in FIG. 3, a wiring pattern 35 is formed on the stator board 34. The ends of each coil 33 are connected to a predetermined wiring pattern 35. . As shown in FIG. 4, a bearing 38 is press-fitted into the bearing holder 35. A capstan shaft (not shown) is rotatably supported by 8. This capsuta The axis is aligned with a rotor magnet (not shown) that faces the surface of the slice coil 31. located on the body.

[0005]

[Problem that the idea aims to solve]

According to the conventional thin coil described above, members such as the bearing holder 35 are attached to the screws 37. Since it is fixed to the stator board 34 on which the slice coil 31 is mounted, the screw 37 The head of the motor protrudes, creating wasted space, especially for small motors. When the size increases, the proportion of wasted space due to the head of screw 37 increases, resulting in a smaller size. This was a hindrance to making the device thinner.

[0006] This invention was made to solve these problems, and it is possible to When integrating components such as a bearing holder and a thin coil using a substrate of This eliminates the need for screws, prevents wasted space, and allows motors to be made smaller and thinner. The purpose of the present invention is to provide a thin coil that can be made into a mold.

[0007]

[Means to solve the problem]

This invention forms multiple recesses that match the shape of the coil on a substrate made of molded resin. A coil is inserted into each recess, and a metal ribbon is placed inside the above board that has a hole in the center. The feature is that the ring is fixed. A wiring pattern may be provided on the board. base Lay the stator board on the plate and make the inner diameter of the stator board equal to the inner diameter of the metal ring. It's okay.

[0008]

[Effect]

Multiple coils are held together on a substrate made of molded resin, forming a thin coil. It will be done. Use the metal ring fixed in the center hole of the above board to attach various parts. Can be implemented. For example, when press-fitting a bearing holder etc. into a metal ring. It is possible to mount a bearing holder, etc. When the wiring pattern is placed on the board If so, wiring is completed by simply connecting the coil to the above wiring pattern. Stick to the board If the stator boards are stacked and the inner diameter of the stator board is equal to the inner diameter of the metal ring, , members such as a bearing holder can be press-fitted into the stator substrate and the metal ring.

[0009]

【Example】

Examples of the thin coil according to the present invention will be explained below with reference to the drawings. Ru. In FIG. 2, an injection molded substrate (hereinafter simply referred to as "substrate") 2 made of molded resin A plurality of recesses 3 are formed at regular intervals in the circumferential direction on one side of the recess. Board 2 is It has a center hole 7, and a metal ring 14 is integrally fitted inside the center hole 7. It is. The metal ring 14 is integrally molded when the substrate 2 is molded using molded resin. It may be insert molded, or it may be fixed by adhesive to the center hole 7 of the substrate 2 after molding. Good too. The recess 3 is formed to have the same planar shape as the trapezoidal coil 6. In the inner part of each recess 3, there is a protrusion having a shape that matches the shape of the inner circumferential surface of the coil 3. 4 is formed. A coil 6 is inserted into each recess 3 and can be press-fitted, bonded, etc. It is integrated with the substrate 2 by means.

0010 The method of manufacturing the coil 6 is not particularly limited, but in this example, the coil 6 is made thin. A sliced coil with a high space factor is used. First of all, the slice coil is Copper foil coated with insulating resin on one side is wrapped around the core using adhesive. After curing the adhesive between the copper foil layers, the core is pulled out and rolled to a predetermined width (0.4 to 1 m). It can be obtained by slicing with m) to form a coil.

[0011] The coil 6, which is a sliced coil as described above, is formed by wrapping copper foil. Therefore, the terminals are located on the side surface of the central hole and on the outer peripheral surface. Therefore, the coil 6 on the substrate 2 made of injection molded resin for wiring. A wiring pattern 9 corresponding to the shape is arranged on the substrate 2 in advance. i.e. the coil 6 is inserted into the recess 3 on the substrate 2, the end of winding on the outer circumferential surface of the coil 6 is in contact with the outer peripheral wall surface of the recess 3, and the winding start portion on the side surface of the central hole of the coil 6 is Since it touches the outer peripheral wall surface of the protrusion 4 formed on the inner side of the recess 3, as shown in FIG. , when the coil 6 is inserted into the recess 3 of the board 2, the land of the wiring pattern 9 is recessed. They are arranged so as to be located at the outer peripheral edge of the portion 3 and the outer peripheral edge of the protrusion 4.

0012 With this kind of wiring pattern, the coil 6 can be connected by simply fitting it into the recess. Since the beginning and end of the winding of the coil 6 touch the land of the wiring pattern 9, the coil 6 After peeling off the insulation coating at the beginning and end of the winding and inserting it into the recess 3, The connection of the coil 6 is completed by simply performing low soldering. Note that the wiring pattern shown in Figure 2 According to the turn, six coils 6 are connected in a three-phase Y-shape.

[0013] In FIG. 1, the thin coil 1 made as described above is made from the molded resin. A substrate 2 is stacked under the stator substrate 11. Each coil 6 is based as described above. Since the wiring ends on board 2, stator board 11 needs to be a wiring board. There isn't. The stator board 11 can also be used as a yoke. stator group The plate 11 has a center hole 12 whose diameter is equal to that of the metal ring 14. It is equal to the inner diameter. The thin coil 1 has a central axis of the metal ring 14. They are positioned so as to coincide with the central axis of the center hole of the data base 11 and are stacked on top of each other.

[0014] A bearing holder 1 is installed in the center hole of the stator board 11 and the metal ring 14 of the thin coil 1. The base end portion 19 of 7 is press-fitted into the thin coil 1, stator board 11, and bearing holder 17. are combined into one. In this way, the thin coil 1 is directly attached to the substrate 2 made of molded resin. Instead of press-fitting the contact bearing holder 17, a metal ring fixed to the center hole 7 of the board 2 is used. By press-fitting the bearing holder 17 into the ring 14, the bearing holder 17 and the thin coil 1 are connected. Because it is integrated, there is no need to use screws like in the past. The purpose of this is to prevent the wasted space caused by I can do that.

[0015] In addition, for reinforcement, the inner circumferential surface 15 of the metal ring 14 and the base end of the bearing holder 17 are 19 and the center hole 12 of the stator board 11 and the bearing holder 1. The outer circumferential surface of the proximal end portion 19 of No. 7 may be bonded. The bearing holder 17 has a flange 18 As mentioned above, the base end 19 of the bearing holder 17 is thinly connected to the stator substrate 11. When the flange 18 is press-fitted into the mold coil 1, the lower surface 20 of the flange 18 is attached to the stator board 11. touches the top surface of the Therefore, the lower surface 20 of the flange 18 and the stator board 11 It may be reinforced by gluing. Furthermore, the base end 1 of the bearing holder 17 9 protrudes from the bottom surface of the thin coil 1, and this protrusion overlaps a part of the metal ring. The caulking portion 21 may be used for reinforcement.

[0016] A bearing 22 is press-fitted into the bearing holder 17, and is illustrated by the bearing 22. No capstan shaft is rotatably supported. The capstan shaft is a flat rotor. The rotor magnet is provided integrally with the rotor including the magnet. It is placed face to face with the mold coil 1.

[0017] According to the embodiment described above, the coil 6 is integrated with the substrate 2 made of molded resin. Even if the coil is thin, the metal ring 14 is fixed to the center hole of the substrate 2. Therefore, the metal ring 14 can be used to create a thin coil without using screws as in the conventional case. It is now possible to integrate parts such as the bearing holder 17 and the bearing holder 1, using screws. The purpose of this is to prevent the wasted space caused by I can do that.

[0018] In addition, since the wiring pattern is provided on the board 2, the coil 6 is inserted into the recess 3. Once installed, all that is left to do is reflow soldering to complete the wiring. There are also points. Furthermore, the stator board 11 is stacked on the board 2, and the center of the stator board 11 is Since the diameter of the hole 12 and the inner diameter of the metal ring 14 are made equal, the inner diameter of the stator board 11 is The bearing holder can be assembled by simply press-fitting, for example, the bearing holder 17 into the core hole 12 and the metal ring 14. Another advantage is that the router 17 and the thin coil 1 can be integrated.

[0019] The thin coil according to the present invention itself has a substrate made of molded resin. Therefore, the stator substrate 11 in the embodiment of FIG. It is also possible to fix the bearing holder 17 directly to the thin coil 1 using the metal ring 14. stomach.

[0020] Additionally, other motor components may also be mounted on a board made of molded resin. stomach. By doing this, the board made of molded resin can also be used as a stator board. can do. The thin coil according to the present invention is applicable not only to capstan motors. It can be applied to motors for various uses.

[0021]

[Effect of the idea]

According to the present invention, the thin coil is formed by integrating the coil with a substrate made of molded resin. However, since the metal ring is fixed to the center hole of the above board, screws cannot be used as before. The above metal ring can be used to attach parts such as bearing holders to thin coils without using It is now possible to implement By preventing this, the motor can be made smaller and thinner.

[0022] In addition, if the wiring pattern is placed on the above board, insert the coil into the recess of the board. The advantage is that after placement, wiring can be completed by simply performing reflow soldering, for example. There is also. Furthermore, stack the stator board on the board, and check the diameter of the center hole of the stator board and the metal If the inner diameter of the ring is made equal, for example, the center hole of the stator board and the metal ring can be connected to the shaft. The thin coil, stator board, bearing holder, etc. can be assembled by simply press-fitting the bearing holder, etc. Another advantage is that it can be integrated with other materials.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of mounting a thin coil according to the present invention.

FIG. 2 is a plan view showing an embodiment of the thin coil according to the present invention.

FIG. 3 is an exploded perspective view showing an example of a conventional thin coil.

FIG. 4 is a sectional view showing an example of mounting the thin coil as above.

[Explanation of symbols]

1 Thin coil 2 Board 3 Recess 6 coil 7 holes 9 Wiring pattern 11 Stator board 14 Metal ring

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Hisamasa Kobayashi 14-888 Ako, Komagane City, Nagano Prefecture Co., Ltd. Inside the Komagane factory of Shasankyo Seiki Seisakusho (72) Creator Tetsuo Hoshina 14-888 Ako, Komagane City, Nagano Prefecture Co., Ltd. Inside the Komagane factory of Shasankyo Seiki Seisakusho

Claims (3)

[Scope of utility model registration request] 1. A plurality of recesses matching the shape of the coil are formed in a substrate made of molded resin, the coil is inserted into each recess, and a metal ring is fixed inside the substrate having a hole in the center. Thin coil. [Claim 2] Claim 1, wherein a wiring pattern is provided on the board.
Thin coil as described. 3. The thin coil according to claim 1, wherein a stator substrate is stacked on the substrate, and the inner diameter of the stator substrate is equal to the inner diameter of the metal ring.