JPH0638701B2 - Method for manufacturing armature using flexible printed circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an armature using a flexible printed board for an armature.

[Conventional technology]

2. Description of the Related Art Conventionally, in an ultra-small motor, for example, a brushless motor having a flat coreless structure (such as a capstan motor of a tape recorder), a printed wiring board is used to configure the armature coil for wiring the armature coil in the magnetic circuit. The winding start end and the winding end end of each unit motor coil are connected to the terminals and lead wires on the printed circuit board by soldering or the like.

[Problems to be Solved by the Invention]

However, in the above process, since the insulating coating at the winding start and winding end of the unit coil is peeled off, a coil whose both ends are tap-pressed has come to be used. Since the soldering work to connect both ends of the coil at the beginning and at the end of winding is the operation of the jig in the unclear space of the air core of the coil and the outer circumference of the coil in the microminiature armature, Since there is a risk that the array accuracy of will be reduced, careful attention is required in manual work,
In addition, automation has suffered from the drawback of lacking productivity and lack of productivity.

The present invention aims to improve the alignment accuracy of the unit coils in the connection work between both ends of the unit coil and the terminals on the printed circuit board, and to improve the positioning of the coils and the coil terminal section and the terminals on the printed circuit board. It is an object of the present invention to provide a method for manufacturing an armature using a flexible printed circuit board that can reduce the labor of the connection work and improve the efficiency of the magnetic circuit.

[Means for Solving the Problems]

In order to achieve the above object, in the flexible printed board of the present invention,
Arranging a desired number of armature coils along the inner peripheral edge of each air core of the unit coil to simplify the coil arrangement and to arrange them. Each pull-out part of the coil is placed close to the winding start land and winding end land of the coil and a cut-and-raised piece is provided on the flexible board, and the coil is placed at a predetermined position on the board. It is characterized in that the land and each cut-and-raised piece are brought into contact with each other and heated and pressure-welded.

[Action]

The armature flexible printed board according to the present invention configured as described above is provided in a coil assembling apparatus separately formed in a plurality of through holes formed along the inner peripheral edge of the air core of each unit coil. Further, by fitting and inserting a pin or other protrusion corresponding to the through hole, the coil is regulated in the front-rear, left-right direction by the joint of the inner peripheral edge of the air core of the coil with a plurality of pins, etc. In this case, the lead-out land at the beginning and end of winding of each coil and the cut-and-raised piece bent upward come into contact with each other.

〔Example〕

Hereinafter, a flexible printed board for an armature of the present invention and a method of manufacturing an armature using the same will be described based on examples.

FIG. 1 is a basic structural view of a flexible printed circuit board of the present invention, a is a plan view and b is a sectional view, and FIG. 2 is an assembling apparatus 3 used for assembling the board 1 and the unit coils 2 and 2. Is a plan view and b is a sectional view.

In FIG. 1, a printed circuit board 1 is a unit coil in which a thin flexible insulating film is cut into an appropriate shape, a phase angle at which a desired number of unit coils 2 and 2 should be arranged is set, and the angle is directed. A plurality of through holes 6 (6 in the drawing) are formed along the inner wall portion 5 of each air core portion 4 of 22 and the inner wall portion of the air core portion 4 of the coils 2 and 2 is formed. 5
The cut-and-raised pieces 10 and 10 'can be undulated at positions corresponding to the winding lands 8 and the winding lands 9 of the tat press coils 2 and 2 arranged along the outer wall 7 and the outer wall 7. And through holes 6 and shaft holes 11 and mounting small holes 12 and 12, which are provided along the inner wall portion 5 of the air core portion 4 of the coil and the shaft holes 11 and small mounting holes. Unit coils 2 and 2 arranged by etching or plating on one surface or both surfaces (upper side in the figure) of the insulating film excluding the holes 12.
The pattern conductor 13 for connecting to each of the winding start portion 8 and the winding end portion 9 for drawing out to the outside through the circuit component is arranged by printing.

After the pattern conductor 13 is printed on the insulating film, the through holes 6 and 6 and the cut and raised pieces 10 and 10 ′ are preliminarily arranged without forming the through holes 6 and 6 and the cut and raised pieces 10 and the like. The pattern conductor 1 is measured at a position excluding that position.
It is needless to say that after printing 3, the holes such as through holes can be formed.

In FIG. 3, the assembling device 3 is practically made by molding a wooden material or other synthetic resin at a position corresponding to the plurality of through holes 6 and 6 formed in the printed circuit board 1 (FIG. 1). Has a shaft hole 14 formed in the center thereof and a small hole 15 for positioning at an appropriate position. The height is higher than the thickness of the printed circuit board 1 and does not exceed the thickness of the coils 2 and 2. The coil guiding pins 16 and 16 adapted to fit into and disengage from the above-described through holes 6 and 6 are provided to the cut-and-raised pieces 10 and 10 ′ provided on the printed circuit board 1. At the corresponding positions, the cut-and-raised pieces 10, 10 ', and the cut-and-raised protrusions 17 for raising
A small projecting portion (not shown), which is formed by projecting 17 and is provided on a workbench having an appropriate height, is fitted with the shaft hole 14 of the assembling device 3 and has a small hole 15 for positioning. After locking the part appropriately,
The printed circuit board 1 is placed on the assembling device 3, the through holes 6 and 6 are inserted into the guiding pins 16 and 16 of the assembling device 3, and the cut and raised pieces 10 and 10 ′ are cut at the assembling device 3. Raising protrusion 17,1
7, the pins 16 and 16 and the cut and raised protrusions 17 and 17 can be exposed on the substrate 1. (FIG. 2 (b)) In this way, on the upper surface of the substrate 1 placed on the assembly device 3,
A pin 16 exposed on the substrate 1 is formed by laminating an appropriate sizing agent or an adhesive sheet 18 and then manually placing a predetermined number of the tap press coils 2 and 2 or an appropriate arranging device including an adsorption mechanism. , 16 and the cut-and-raised protrusions 17 and 17 are made to correspond to the inner wall portion 5 of the air-core portion 4 of the coil, and the through holes 6 and 6 and the pin 1
6, 16 parts, cut and raised pieces 10, 10 'and cut and raised protrusions 17,
17 parts are fitted to each other, the coils 2 and 2 are arranged on the substrate 1, and the winding start part 8 and the winding end part 9 of the coils 2 and 2 and the cut and raised pieces 10 and 10 'are brought close to each other. Coil 2
After the temporary positioning, the pattern conductor 13 of the substrate 1 and the winding start portion 8 and the winding end portion 9 of the coils 2 and 2 are soldered to each other, and then the assembly device 3 is detached from the substrate 1.

Next, a preferred embodiment of the method for manufacturing an armature using the flexible printed circuit board of the present invention will be described. FIG. 3 is an example of a basic structure, a is a plan view, and b is DD of FIG.
FIG.

As shown in FIG. 3 (a), a plurality of through holes 6, 6 are formed along the inner wall portion 5 of the air core portion 4 of the unit coil 2 on the printed circuit board 1.
And the desired number of unit coils 2 and 2 are arranged at the positions where the respective tap press coils 2 and 2 should be placed close to the winding start 8 and winding end 9 extraction portion lands, and the cut-and-raised pieces 10 and 1 should be provided.
Step 0 for freely punching 0 ', and separately provided assembling device 3 having pins 16, 16 cut-raised protrusions 17, 17 corresponding to the through holes 6, 6 and the cut-raised pieces 10, 10'. (Fig. 2
(a) (b), (c)) through the through holes 6, 6 of the printed circuit board 1.
6 and the cut-and-raised pieces 10 and 10 ′, the pins 16 and 16 and the cut-and-raised protrusions 17 and 17 projecting from the assembling device 3 are fitted and exposed on the upper surface of the printed circuit board 1. , A gluing agent or other adhesive sheet 18 required for adhering the coils 2 and 2 to the substrate 1 is laminated at the coil arrangement position on the substrate 1, and a predetermined tap press coil 2 or 2 is provided on the upper surface of the substrate 1. The exposed pins 16 and 16 of the assembling device 3 and the cut-and-raised protrusion 1
The inner wall portion 5 of the air-core portion 4 of the tat press coils 2 and 2 is arranged so that the pin 1
6 and 16, the lead-out portions 8 and 9 of the tat press coils 2 and 2 are displaced on the substrate 1 and cut and raised.
Cut-and-raised pieces 16,1 pushed upward by 7,17
6 and 6 are close to each other.

At this time, it is desirable to attach the preliminary solder 19 to each winding start portion 8 and the winding end portion 9 of the tat press coils 2 and 2, and the cream solder 20 to the cut and raised pieces 10 and 10 '.
(FIG. 2 (c)) As described above, the tat press coils 2 and 2 are provided on the substrate 1 and the winding start portions 8 and the winding end portions 9 of the tat press coils 2 and 2 are formed.
The pull-out portion and the cut-and-raised pieces 10, 10 'are provisionally positioned at positions close to each other. Next, each winding start portion and winding end extraction portion 8, 9 of the tat press coil 2, 2 and the pattern conductor portion 13 of the cut-and-raised piece 10, 10 'are welded through an appropriate soldering device to form a coil pole. An armature can be obtained by forming the flexible printed circuit board.

In the above configuration, depending on the performance of the sizing agent or the adhesive sheet interposed between the coil and the substrate, it is desirable to appropriately heat the coil when it is pressed from above.

After the flexible printed circuit board and the coil have been joined, it is desirable that the armature be molded with a suitable synthetic resin molding die 21 in order to impart rigidity to the motor housing in terms of mounting.

〔The invention's effect〕

Since the invention of the present application has the above-described configuration, it has the following effects.

(a) Since the tapless coil can be arranged while maintaining a predetermined phase angle accurately, efficient electromagnetic characteristics can be realized.

(b) It is possible to improve the accuracy of coil pole arrangement by facilitating the connection work between the winding start and winding end extraction parts of the tat press coil and the printed pattern conductor.

(c) Coil arrangement and connection work between coil and pattern conductor can be facilitated and speeded up, automation can be supported and mass production is possible, which is useful for cost reduction and various industrial effects such as being able to provide an armature at low cost. It is an invention that plays.

[Brief description of drawings]

1 is a plan view of a flexible substrate according to the present invention, (a) is a plan view, and (b) is (a).
Fig. 2 is a sectional view taken along the line A-A, Fig. 2 is a basic structure diagram of the coil assembling apparatus, (a) is a plan view, (b) is (a) a sectional view taken along line BB, and (c) is ( b) Enlarged sectional view taken along the line CC in FIG.
Fig. 3 shows the basic structure of the armature. (A) is a plan view, (b) is (a)
FIG. 4 is a cross-sectional view taken along the line D-D of FIG. 4, and FIG. 4 is a partially cutaway perspective view showing the relationship between the coil and the cut-and-raised piece after the assembly apparatus is removed. DESCRIPTION OF SYMBOLS 1; Substrate 10, 10 '; Cut and raised piece 2, 2; Unit coil, 11; Shaft hole 3; Assembly device, 12; Small hole 4; Air core part, 13; Pattern conductor 5; Inner wall part , 14; shaft hole 6, 6; through hole, 15; small hole 7; outer wall portion, 16, 16; pin 8; winding beginning portion, 17, 17; cut and raised protrusion 9; winding end portion, 18; adhesiveness Sheet 19; Preliminary solder 20; Cream solder 21; Mold

Claims (1)

[Claims] 1. A flexible printed circuit board is provided with a plurality of through holes at a position where a coil is mounted along an inner wall portion of each air core portion of the mounted coil, and a winding start of each of the mounted coil is performed. And a step of providing a cut-and-raised piece at a position corresponding to the land at the end of winding and a plurality of pins for guiding each mounted coil at a position corresponding to a through hole provided on the printed circuit board. At the same time, an assembling device is separately formed in which a cut-and-raised protrusion for cutting and raising the raised piece is provided at a position corresponding to the cut-and-raised piece provided on the printed circuit board, and a shaft hole is bored in the central portion. , The printed circuit board is placed on the assembling device, and the pins provided on the assembling device are inserted into the through holes provided in the printed circuit board so as to project onto the printed circuit board, Place each mounted coil along the pin, and The cut-and-raised protrusions provided on the assembling device are inserted into the positions of the cut-and-raised pieces corresponding to the respective drawn-out lands of the placed coils, and the cut-and-raised pieces are raised through this to raise the mounted coils Manufacture of an armature using a flexible printed circuit board, characterized by combining the step of positioning and the step of separating the pattern conductor of the printed circuit board and each lead-out portion of each coil from the assembly device after welding. Method.