JP2001352739A - Manufacturing method of stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts and connection space, and to reduce assembly man-hours. SOLUTION: When a stator where a plurality of coils 26 and 26 that are connected in series are fitted to a plurality of adjacent cores is to be manufactured, the coils 26 and 26 are wound around each of coil bobbins 25 and 25 by a coil for straddling over the plurality of coil bobbins 25 and 25 while the plurality of coil bobbins 25 and 25 are aligned coaxially. After that, each coil bobbin 25 is fitted to each core. The coil 26 is wound around the plurality of coil bobbins 25 continuously, no separate connection operation is required for series connection between the coils 26 and 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a stator in which two coils connected in series are arranged in parallel.

[0002]

2. Description of the Related Art As shown in FIG.
When the coils 26 are mounted on the stator core 20 in which the coils 1 and 21 are arranged in parallel and parallel via the coil bobbins 25 and 25, the coils 26 are wound around the respective coil bobbins 25 and mounted on the iron core portions 21 and 21. ing.

[0003]

In this case, even in the case where two coils 26, 26 are connected in series, a lead terminal 27 for processing the terminal of the coil 26 is required for each coil bobbin 25, so that two Coils 26, 26
In the illustrated example having the drawing, a total of four lead terminals 27 are provided.
is necessary.

When a large number of lead-out terminals 27 are required as described above, space for the draw-out terminals 27,
In terms of securing space for connecting external lead wires to
This requires a lot of space in the device, which is a limitation on miniaturization of the device.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and it is an object of the present invention to provide a method of manufacturing a stator which can reduce the number of parts, a wiring space, and the number of assembly steps. To be.

[0006]

SUMMARY OF THE INVENTION The present invention is a method of manufacturing a stator in which a plurality of coils connected in series to a plurality of adjacent iron cores are mounted, and a plurality of coil bobbins are arranged coaxially. In this state, a coil is wound around each coil bobbin with a single winding straddling a plurality of coil bobbins, and thereafter, each coil bobbin is attached to each iron core. By winding the coil continuously around the plurality of coil bobbins, it is not necessary to separately connect the coils for series connection.

[0007] As the above-mentioned coil bobbin, a coil bobbin provided with a convex rib for winding locking on the side adjacent to another coil bobbin when arranged coaxially is used, and one winding straddling between the coil bobbins is provided with the above-mentioned convex shape. Using a coil bobbin that has a notch for winding locking on the side where another coil bobbin is adjacent when coaxially arranged, and one coil that straddles between coil bobbins is used as the coil bobbin. When the notches are engaged, the portions connecting the coil bobbins can be prevented from loosening.

In addition, a coil bobbin having a groove for passing a coil through a flange on the side adjacent to another coil bobbin when arranged coaxially is used, and one coil bobbin straddling between two coil bobbins. Is passed between the coil bobbins through the groove, the slack in the portion connecting the two coil bobbins can be reduced. At this time, it is preferable that the groove is formed as a coil bobbin along the winding-over shape. It is also preferable to use a coil bobbin in which a groove is provided at a symmetric position of the coil bobbin.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment. FIGS. 3 to 5 show a vibration type linear actuator provided with a stator 2 manufactured by a manufacturing method according to the present invention. The vibration type linear actuator used as a driving source of a reciprocating electric shaver is
As shown in FIG. 5, a chassis 1 formed as a sheet metal part, a stator 2 coupled and fixed to the chassis 1,
Two movers 3a, 3b suspended from the chassis 1 via connecting members 4, 4 which are leaf springs, two coil springs 5, 5 bridged between the two movers 3a, 3b, and both And a link 6 connecting the movers 3a and 3b to vibrate the movers 3a and 3b in opposite phases. Here, the stator 2 is configured as an electromagnet,
The movers 3a, 3b have permanent magnets 31, 31, respectively.
By passing an alternating current through the coils 26, 26 of the stator 2, the two movers 3a, 3b are reciprocally oscillated in opposite phases.

The upper end of the connecting member 4 is fixed to the chassis 1 via the base 40, and the supporting members 41 at the lower ends are connected to the lower portions of the outer surfaces of both ends of the movers 3a and 3b, so that both ends are connected. The connecting members 4, which suspend and support the movers 3 a, 3 b, and are made of leaf springs that exhibit spring properties only in the direction in which the movers 3 a, 3 b reciprocate vibrate, are arranged in parallel in parallel. The reciprocating motion of the slaves 3a and 3b is enabled.

Each of the movers 3a and 3b includes a back yoke 32
The permanent magnet 31 is adhered and fixed to the lower surface of the back yoke 32. The driving element 33 to which the inner blade of the electric razor is connected.
a and 33b project upward from each of the movers 3a and 3b. The driver 33a of the mover 3a has a connecting portion 34 that projects rearward from the center of the mover 3a in the vibration direction. The driving element 33b of the mover 3b is provided via a gate-shaped connecting portion 35 protruding forward from both ends of the mover 3b. Assembled through the connecting portion 34 in the portion 35. For this reason, these movers 3a,
The center of gravity in the front-back direction of 3b is the two movers 3a, 3b
Are located at the center in the front-rear direction in which are arranged.

The two coil springs 5, 5 are provided between both side surfaces of the connecting portion 34 of the mover 3a and inner surfaces of both sides of the portal-shaped connecting portion 35 of the mover 3b. The link 6 is the chassis 1
The center is pivotally supported by the shaft 19 provided at the end and the shafts 60, 60 at both ends are connected to the movers 3a, 3b,
The movement of both movers 3a, 3b is regulated so that the reciprocating vibrations of both movers 3a, 3b are made in opposite phases.

The stator 2 is an electromagnet in which coils 26, 26 are wound around two core portions 21, 21 of a stator core 20 in which a sintered body of a magnetic material or an iron plate of a magnetic material is laminated via coil bobbins 25, 25, respectively. , And faces the permanent magnet 31 provided on the mover 3 with an air gap therebetween.
The stator 2 is welded in a state where the step portions 23 provided on both sides of the iron core portions 21 and 21 of the stator core 20 are positioned and brought into contact with the joint portion 10 which is the lower end surface of both sides of the chassis 1. It is performed by fixing by such means.

Here, 2 in the stator 2
The two coils 26, 26 are connected in series, and the winding of the coil 26 around the coil bobbin 25 is performed with the two coil bobbins 25, 25 arranged coaxially as shown in FIG. This is done by winding a series of wires. For example, when winding the winding in one layer, FIG.
Is wound from the left end to the right end of the coil bobbin 25 on the left side, and the winding is passed to the left end of the coil bobbin 25 on the right side and wound to the right end. In the case of winding in two layers (or even layers), the winding is wound from the right end to the left end of the left coil bobbin 25, turned back at the left end, and superposed on the right end. Then, the winding is passed over the coil bobbin 25 on the right side and wound from the left end to the right end of the coil bobbin 25, and is folded at the right end and wound up to the left end. It is needless to say that the coil may be wound from the coil bobbin 25 on the right side.

The coils 26, 26 are wound as described above.
Are formed in series, the two coil bobbins 25 are raised to be parallel, and then the core portion 2 of the stator core 20 is formed.
The two coils 26, 26 are attached to 1, 21.

In this case, since the two coils 26, 26 to be connected in series are already connected when wound around the coil bobbins 25, 25, the lead-out terminal 27 for external connection is connected to one coil bobbin 25. One and the other coil bobbin 25 may have two (or two if the number of coils 26 is three or more).
This can reduce the space and process for connecting wires. In the drawing, reference numeral 250 denotes a holding unit for holding a lead terminal.

FIG. 6 shows another example. This is coil bobbin 2
5, a single winding that straddles between the coil bobbins 25, 25 is formed by projecting a convex rib 251 for winding locking from a flange on the side adjacent to another coil bobbin 25 when arranged coaxially. By hooking 26 'on the convex rib 251 and locking it, loosening of the winding 26' at the portion straddling the coil bobbins 25, 25 affects the coil 26, and causes interference or contact with surrounding components. There is no such thing.

As shown in FIG. 7, a notch 252 may be provided in place of the convex rib 251, and one winding 26 'straddling between the coil bobbins 25, 25 may be engaged with the notch 252.

Further, since the flange located at the axial end of the coil bobbin 25 causes a slack in the winding straddling between the coil bobbins 25, 25, as shown in FIG. If the groove 253 for passing is provided, the slack can be reduced.

FIG. 9 shows that the groove 253 is formed so as to conform to the shape of the winding, so that the notch amount of the flange is minimized to improve the reliability of insulation by the flange. The groove 253 is also provided at a symmetric position of the coil bobbin 25 so that the coil bobbin 25 has no directionality and only one type of coil bobbin 25 is required.

[0021]

As described above, according to the present invention, in manufacturing a stator in which a plurality of coils connected in series to a plurality of adjacent iron core portions are mounted, a plurality of coil bobbins are arranged coaxially. A coil is wound around each coil bobbin with one winding straddling a plurality of coil bobbins, and thereafter, each coil bobbin is attached to each iron core,
In order to continuously wind the coil around a plurality of coil bobbins, it is possible to simplify the winding operation process, and it is not necessary to perform a separate connection operation for series connection between the coils, In addition, the number of lead-out terminals and the connection work on the coil bobbin can be reduced, and the space for arranging the lead-out terminals and the connection space can be reduced, so that the size of equipment using the stator can be reduced.

When one of the coil bobbins is provided with a convex rib for locking the coil on the side adjacent to the other coil bobbin when the coil bobbins are arranged coaxially, one coil straddling between the coil bobbins is used. One coil that straddles between coil bobbins using a coil bobbin that is notched on the side adjacent to another coil bobbin when arranged coaxially, as a coil bobbin Can be prevented from loosening of the portion connecting the coil bobbins, and the slack portion can be prevented from contacting or interfering with other components.

Further, as the coil bobbin, a coil bobbin provided with a groove for allowing a coil to pass through a flange on the side adjacent to another coil bobbin when arranged coaxially is used, and one coil bobbin straddling between two coil bobbins. Passing between the coil bobbins through the groove, it is possible to reduce the slack of the portion connecting the two coil bobbins, and as a result, it is possible to prevent the slack portion from contacting or interfering with other parts. it can.

At this time, if the groove is formed as a coil bobbin so as to follow the shape of the winding, the reduction of the insulation distance due to the provision of the groove can be minimized.

Further, if a coil bobbin in which a groove is provided also at a symmetric position of the coil bobbin is used, the direction of the coil bobbin is lost, so that it is not necessary to create a plurality of types of coil bobbins.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an embodiment of the present invention.

FIG. 2 is a perspective view of the same coil bobbin and stator core.

FIG. 3 is a front view of a vibration linear actuator including a stator according to the present invention.

FIG. 4 is a perspective view of the same actuator.

FIG. 5 is an exploded perspective view of the actuator.

FIG. 6 is a perspective view of a coil bobbin according to another example of the present invention.

FIG. 7 is a perspective view of a coil bobbin according to still another example.

FIG. 8 is a perspective view of a coil bobbin according to another example.

FIG. 9 is a perspective view of a coil bobbin according to still another example.

FIG. 10 is a perspective view of a coil bobbin according to a different example.

FIG. 11 is a perspective view of a conventional coil bobbin and a stator core.

[Explanation of symbols]

 25 coil bobbin 26 coil

Continued on the front page (72) Inventor Eiichi Yabuuchi 1048 Kadoma Kadoma, Osaka Pref. Matsushita Electric Works, Ltd. ) Inventor Noboru Kobayashi 1048, Kazuma, Kazuma, Osaka Prefecture F-term in Matsushita Electric Works, Ltd.

Claims (6)

[Claims] 1. A method for manufacturing a stator in which a plurality of coils connected in series to a plurality of adjacent iron core portions are mounted, wherein one coil straddles the plurality of coil bobbins in a state where the plurality of coil bobbins are arranged coaxially. A coil is wound around each coil bobbin with the above winding, and thereafter, each coil bobbin is attached to each iron core portion. 2. A coil bobbin provided with a convex rib for retaining a coil on a side adjacent to another coil bobbin when arranged coaxially, and one coil straddling between coil bobbins is formed as the coil bobbin. 2. The locking device according to claim 1, wherein the locking member is engaged with a rib.
A method for manufacturing the stator described in the above. 3. A coil bobbin provided with a notch for locking a coil on a side adjacent to another coil bobbin when arranged coaxially, and one coil straddling between coil bobbins is inserted into the notch. The method according to claim 1, wherein the stator is locked. 4. A coil bobbin which is provided with a groove for passing a coil through a flange on the side adjacent to another coil bobbin when arranged coaxially, and one coil straddling between coil bobbins is used as the coil bobbin. The method for manufacturing a stator according to any one of claims 1 to 3, wherein the coil bobbin is passed through the groove. 5. The method for manufacturing a stator according to claim 4, wherein a coil bobbin provided with a groove formed along a winding crossing shape is used. 6. The method for manufacturing a stator according to claim 4, wherein a coil bobbin provided with grooves at symmetrical positions is used.