JPS61110405A - Laminated sheet coil - Google Patents

Abstract

PURPOSE:To facilitate accurate construction, to narrow a magnetic gap and thereby to improve an electromagnetic efficiency of a motor, by forming an ear member on the outer periphery of a coil block monolithically with this block, and by using said ear member as a means to fit and position the coil block. CONSTITUTION:A metal layer of an ear member pattern, which is so shaped as to be non-continuous electrically to a conductor layer of a coil pattern, is formed on all sheets to be laminated, and it is so disposed that the ear member pattern on each sheet comes to the same position when the sheet is laminated. Thereby a firm ear member as a laminate of the metal layers is formed monolithically with a coil block when the sheet is laminated with an adhesive interposed between the sheets. The ear member formed monolithically with the coil block functions as a tongue piece for positioning the coil block when this block is fitted to a motor frame. When applied to an armature coil of an axial flux type brushless motor, for instance, an ear member 3 formed in the shape of a tongue engages with a pawl 5 formed by pressing a motor frame 4, thus functioning for positioning the armature coil.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a laminated sheet coil used in a small motor.

(Conventional Technique #) A laminated sheet coil is a sheet-like coil made by forming a flat spiral four-body pattern on a thin metal conductor plate with a thin insulating sheet pasted on one side using a method such as photo-etching. Laminate the required number of sheets using adhesive,
In addition, a coil block formed by electrically connecting the coil conductors of each sheet is used as a coil for a motor or a transformer.

In particular, when used as a Tanabata armature, it is generally a coreless type, so there is no winding groove to accommodate the coil conductor, so-called slots, and the entire coil block is molded with resin, so the winding is not possible. No winding frame or winding core is used as in the case of type coils.

For this reason, in the past, in order to hold the coil block in a predetermined position on the stator, for example, when installing a coil using glass cloth base material epoxy*a, the fill block was fixed to the substrate by a method such as adhesive bonding. The method used was to attach it to the frame of the equipment.

(Problems to be Solved by the Invention) It is essential to attach the armature coil of the motor to the motor frame with precise positional accuracy.

The method of attaching the coil to the motor frame via the mounting board has the disadvantage that the mounting tends to impair positional accuracy and that the magnetic gap in the motor becomes larger due to the length of the board.

(Means for Solving the Problems) The present invention is capable of narrowing the magnetic gap length and improving the positional accuracy of the coil by directly attaching the coil to the stator frame without using a substrate. It provides a productive means to maintain productivity.

That is, in the present invention, ears are formed integrally with the coil block on the outer periphery of the coil block, and these ears are used as a means for attaching and positioning the coil block. For example, the specific focus on forming the ears is disclosed in Japanese Patent Application Laid-Open No. 57-18694.
In the manufacturing procedure of the coil for a small motor described in the specification group 0, the shape of the above-mentioned ear portion is etched at the same time using T[, which forms the coil pattern by photo-etching. ! I]
In the photomask used in the photoetching process,
By using a material in which not only the fill pattern but also the shape of the ear portion described above is drawn, scraps with the shape of the ear portion made of the same metal material as the coil conductor can be placed on the same insulating sheet on which the fill conductor layer is placed. is formed simultaneously with the coil conductor pattern formation in the same process.

In this case, the metal layer of the ear pattern has a shape that has no electrical conduction with the conductor layer of the coil pattern, and is formed on all sheets to be laminated, and when the sheets are laminated, the metal layer is formed on each sheet. By arranging the ear patterns so that they are at the same position, a strong ear as a laminate of metal layers is formed integrally with the coil block when the notebook is laminated with an adhesive. From the viewpoint of the mechanical strength of the ears, it is desirable that the insulating layer be thinner than the thickness of the conductor layer.In addition, when attaching the coil block manufactured in this way to the motor body, there is no need for mounting. No board is used.

(Function) The ears formed integrally with the coil block act as tongues for positioning when attaching the coil block to the motor frame, and by providing holes in the ears, the coil block can be screwed.

Mounting for attachment to the motor frame by rivets, pins, etc. also acts as a piece.

Further, when the present invention is applied to a motor in which the coil is on the rotor side, the ear portion provided with the hole acts as a mechanical connection portion, for example, a link node, for transmitting the movement of the rotor to the driven portion.
Alternatively, by appropriately selecting the outer shape of the ears, they act as cams.

(Embodiment) Fig. 1 shows a specific example of type A of the present invention, which is an Akinyar Flags type brushless motor. ! ! The motor structure is shown open when applied as a machine coil. A bearing 6 and a stator back yoke 7 are attached to a motor frame 4 made of a soft 11I plate, and a rotor magnet 9 is attached to a shaft 8 and rotates in the rotating field. It forms a magnet. The machine coil is M! Sheet coil [consisting of 2 laminated sheet coils]
The four-coil pattern 2 is formed by laminating multiple coil sheets formed on a thin insulating sheet. In addition,
In the figure, the spiral pattern of the coil conductor is omitted, and only the outer shape of the coil is depicted.

To attach the machine coil to the stator side of the motor, use 1.
1! Laminated sheet coil l and stator yoke 7 by one agent
At this time, the tongue-shaped ears l1lI3
engages with a pawl 5 punched from the motor frame 4 to position the armature coil.

FIG. 2 shows another specific example of the present invention, in which the motor structure is expanded and shown when applied as an electric F coil of an axial flux type brushless motor. A stator back yoke 7 is attached, and a bearing supports the shaft of a rotor magnet (not shown).

The armature coil consists of a laminated note coil 1. The laminated note coil has a coil conductor pattern 2 formed by laminating multiple coil sheets formed on 5 insulated notes. In FIG. 1, the S-wound pattern of the coil conductor is not shown, and only the outer shape of the coil is depicted. A hole 10 is formed in the ear portion 3 and is engaged by a screw 12 with a threaded portion 11 formed in the motor frame 4 and the stator yoke 7 for mounting and positioning.

FIG. 3 shows still another example of the specific embodiment of the present invention, showing the structure of a motor in which the armature coil rotates within the stator magnetic field. H bearings 14 and 14' are attached to the two upper and lower motor frames 4 and 4' shown open.
151II+ supports the shaft 13 of the armature. Further, stator magnets 18 are attached to both the upper and lower motor frames, respectively.

A fixed 7-magnetic field is generated between opposing stator magnets. +41 The child coil consists of a laminated sheet coil l, and the laminated sheet coil has a thin coil conductor pattern 2! i
The coil notes formed in the edge note E are laminated in multiple layers. In the figure, the spiral pattern of the coil conductor is not shown, and only the outer shape of the coil is depicted. A hole 17 is formed in the ear portion 3, and 1!
When the Isogo coil rotates, it engages with a link 15 and pin 16 that transmit the movement to an external follower section (not shown).

(Effect of the invention) According to the present invention, the relative position ytI between the ear portion and the armature coil
51 can be inserted and formed accurately, making it easy to accurately configure the electromagnetic structure of the motor.

One of the remoters has a narrower air gap because there is no need for a board for installing the coil! Contributes to improving magnetic efficiency. In addition, since a coil mounting j and plate are not used, the number of parts and assembly man-hours can be reduced. Furthermore, if the M1m coil is applied to a motor that moves in the stator magnetic field, there is no need to separately attach a crank or cam to the shaft end to transmit the movement of the armature to the trailing section. The axial dimension of the motor can be shortened to 1 t# for downsizing equipment.

[Brief explanation of the drawing]

No. tv4 is an example of a specific embodiment of the present invention, and when applied as an armature coil of a 7-axis Franks type planless motor. When applied as an armature coil of a Franks type brushless motor, Fig. 3 shows still another example of the concrete I11 type of the present invention, in which the armature coil moves simultaneously in the stator magnetic field. This is the case when applied to L: Laminated coil, 2: Coil conductor button. 3: Ear part, 4: Motor frame patent applicant Kani Electrical Equipment Co., Ltd. Figure 1 Figure 2? 1 Heki layer sheet coil 2 11 coils pattern 3 selvedge 4 Moog frame Fig. 3

Claims (2)

[Claims] (1) In a laminated sheet coil formed by laminating multiple layers of coil sheets in which a coil conductor pattern is formed on an insulating sheet, an ear portion is provided on the outer periphery of the coil conductor pattern arrangement, and the ear portion is attached to each insulating sheet. A laminated sheet coil characterized in that it consists of a laminated body of an ear pattern that is integrally formed on a sheet from the same conductor material layer as the coil conductor at the same time as the coil conductor pattern is formed, and is not electrically conductive with the coil conductor. . (2) The laminated sheet coil according to claim 1, wherein the thickness of the insulating sheet is thinner than the thickness of the coil conductor layer formed thereon.