JPH0888960A - Generation coil for ignition of magnetic generator - Google Patents

Abstract

PURPOSE: To prevent an adhesive applied on one side of a tape from sticking to a wire material and the wire material from being wound on a bobbin. CONSTITUTION: This is a generation coil 1 for ignition where a wire material 81 is wound on a bobbin 10. The bobbin 10 has a drum 11 and a flange 12, and a tape 13 for prevention of lift of a wire material is bonded to the drum 11. A seat member 21 to abut on the flange 12 and the cover face of the tape 13 is arranged at the corner of the bobbin 10, and the seat member 21 has an incline on which to wind a wire material, and a cavity 15 is made between it and the corner. It is desirable that the drum 11 can be set in by opening both ends of the seat member 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition coil for a magnet type generator of a two-wheeled vehicle.

[0002]

2. Description of the Related Art An ignition power generation coil for a magnet type power generator mounted on an engine of a two-wheeled vehicle is formed by winding a thin wire (0.2 mmφ or less) around a winding frame made of synthetic resin and integrally formed with a core. Produced. A fixing tape is provided between the winding frame and the winding wire so that the wire material at the boundary between the winding frame and the winding wire does not float. This tape is coated on one side with an adhesive to form a winding frame. Glued to the torso. In addition, a self-bonding copper wire is generally used as the wire, and the fusion layer formed on the surface of the insulating layer of the wire is melted by self-heating, and the copper wires are fused and fixed.

[0003]

[Problems to be Solved] However, in the conventional ignition power generation coil, a defect such as disconnection sometimes occurs. The inventor has pursued the cause of the wire breakage, and one of the major causes thereof is that the adhesive is extruded from the tape for preventing the wire rod from floating, and the winding is fixed to the flange portion of the winding frame, which causes the wire breakage or the like. It was clarified that the trouble of occurs.

That is, when the winding is wound on the tape,
Due to the pressing force, the adhesive on the back surface of the tape is extruded to both ends of the reel, and the extruded adhesive adheres to the flanges (which form a wall surface perpendicular to the body of the reel) at both ends of the reel, Fix the wire to the collar and cause a problem.

When the wire rod is fixed to the collar portion, stress is excessively concentrated on the fixed wire rod, which causes a problem such as disconnection. That is, the stress concentrates on the wire material fixed by the thermal stress due to the difference in the coefficient of thermal expansion between the winding frame (flange) and the wire material or the mechanical vibration due to the vibration of the engine, which causes damage such as disconnection. Occurs. In view of the above conventional problems, the present invention can prevent the adhesive of the tape for preventing the wire rod from adhering to the wire rod and can prevent problems such as wire breakage. Is to provide.

[0006]

The present invention relates to an ignition power generation coil for a magnet type generator of a two-wheeled vehicle in which a wire is wound around a winding frame, the winding frame including a body portion around which the wire is wound, The both ends of the body have flanges that form a wall surface perpendicular to the body, and the outer peripheral surface of the body is covered with a tape for preventing the wire rod from floating, which is adhered with an adhesive. Also, at the corners of both ends of the bobbin where the body and the collar are orthogonal to each other, both sides of the wall surface of the collar and the tape-covered surface of the body are brought into contact with each other to move around the body. A sheet member that makes one round or almost one round is arranged, and the sheet member has an outer peripheral surface having an inclined surface from the wall surface side toward the tape coating surface side, and the inner peripheral surface of the sheet member and the corner portion. A space around the corner is formed between the wire and the wire.
The ignition power generation coil of a magnet type generator is characterized in that it is wound along the outer peripheral surface of the sheet member in the vicinity of both ends of the winding frame.

What is most noticeable in the present invention is that a sheet member is disposed at both ends of the bobbin so as to abut the wall surface of the collar portion and the tape-covered surface of the body portion and go around the body portion. Is. The sheet member has an outer peripheral surface having an inclined surface from the wall surface side toward the tape coating surface side, and a gap is provided between the inner peripheral surface of the sheet member and the angle.

Further, in the vicinity of both ends of the winding frame, the wire is wound along the outer peripheral surface. The sheet member may have a closed ring shape around the body portion, or may have an open ring shape with gaps at both ends. The outer peripheral surface of the sheet member is an outer surface around which the wire is wound.

It is preferable that the sheet member is not a completely closed ring-shaped member but is provided with both ends so that the gap between the both ends can be widened. That is, the sheet member has a closed ring shape or an open ring shape in which both ends are brought into contact with or brought close to each other, and the both ends of the sheet member are expanded so that the body part of the reel can be fitted inward from the expanded part. Is preferred.

With this structure, the sheet member can be easily fitted to the body portion of the winding frame having the flange portion, and the assembling can be facilitated (see FIG. 4). In order to open both ends of the sheet member, it can be easily realized by forming the sheet member with an elastic member having an appropriate elastic coefficient.

[0011]

In the ignition power generation coil according to the present invention, the sheet members are arranged at the angles of both ends of the winding frame, and there is a space between the inner peripheral surface of the sheet member and the corners. Parts are formed. Therefore, even if the adhesive is pushed out from both ends of the tape by being pressed by the winding wire, the adhesive remains in the void.

Further, the wire is wound around the outer peripheral surface of the sheet member in the vicinity of both ends of the winding frame, and does not come into contact with the adhesive retained in the void. Therefore, the wire is not adhered to the winding frame or the sheet member by the adhesive, and stress concentration of the wire caused by such adherence and disconnection failure due to the stress do not occur.

Further, an inclined surface is provided on the outer peripheral surface of the sheet member, and by winding a wire on the inclined surface, the sheet member is pressed toward the tape covering surface and the wall surface of the flange portion. Therefore, the sheet member is pressed by the winding at the angle of the winding frame and stably held.

As described above, according to the present invention, it is possible to prevent the adhesive of the tape for preventing the floating of the wire from adhering to the wire and to prevent problems such as wire breakage of the winding. A coil can be provided.

[0015]

【Example】

Example 1 FIG. 1 shows an ignition power generation coil according to an example of the present invention.
~ It demonstrates using FIG. In this example, the wire rod 81 is attached to the bobbin 10.
It is an ignition power generation coil 1 of a magnet type power generator of a two-wheeled vehicle in which a coil is wound. The bobbin 10 has a body 11 around which the wire 81 is wound, and a flange 12 that forms wall surfaces 121 (FIG. 3) perpendicular to the body 11 at both ends of the body 11.

The outer peripheral surface of the body portion 11 is covered with a tape 13 for preventing the wire 81 from floating, which is adhered with an adhesive agent. As shown in FIG. 2, a sheet member 21 is disposed at the corner portion so as to abut on both the wall surface 121 of the flange portion 12 and the covering surface of the tape 13 and to make a complete circle around the body portion 11 as shown in FIG.

As shown in FIG. 3, the sheet member 21 has an inclined surface 21 extending from the wall surface 121 side toward the covering surface of the tape 13.
It has an outer peripheral surface 210 having 1, 212. Further, between the inner peripheral surface 215 of the sheet member 21 and the corner portion, a void portion 15 (FIG. 2) is formed so as to go around the corner portion.

Then, the wire 81 is, as shown in FIG.
In the vicinity of both ends of the winding frame 10, the sheet is wound around the outer peripheral surface 210 (FIG. 3) of the sheet member 21. As shown in FIGS. 2 and 4, the sheet member 21 includes two end portions 217, 21.
8 has an open ring shape close to each other, and as shown by the broken line in FIG. 4, the gap between both end portions 217 and 218 can be widened to fit the body portion 11 of the reel 10 inside thereof. It is formed by an elastically deformable member.

In FIGS. 1 and 2, reference numeral 31 is a core formed by stacking punched iron plates. The bobbin 10 is made of a resin such as nylon and is molded integrally with the core 31. The tape 13 is formed by applying an adhesive such as epoxy on one surface of a non-woven fabric or the like, and the adhesive application surface is brought into surface contact with the body portion 11 and adhered to the outer peripheral surface of the body portion 11.

The wire rod 81 is a so-called self-bonding copper wire, which has a fusion bonding layer formed on the outside of the insulating coating so as to fuse the wire rods 81 by heating. The sheet member 21 is made of nylon or the like, and as shown by the broken line in FIG.
Both ends 217 and 218 are expanded and fitted to the body of the bobbin 10. In FIG. 1, reference numeral 32 is a protective tape that protects the outer surface of the winding.

Next, the function and effect of the ignition power generation coil 1 of this embodiment will be described. In this example, even if the wire material is heated for self-bonding and the adhesive agent of the tape 13 is softened and oozes out from both ends in this example, the adhesive agent does not leave the void 1
5 does not accumulate and stick to the wire rod 81. Therefore, unlike the conventional ignition power generation coil, the wire 81 does not stick to the winding frame 10. Therefore, stress is not excessively concentrated on the wire rod 81, and problems such as disconnection are less likely to occur.

Since the wire rod 81 is wound on the inclined surfaces 211 and 212 of the sheet member 21, the sheet member 21 is pressed against the corner portion of the winding frame 10 by the tightening force of the wire rod 81 and adheres tightly to the winding frame 10. To do. Therefore, no gap is formed between the sheet member 21 and the wall surface 121 of the flange portion 12, and the wire rod 81 does not enter the gap.

As described above, according to this embodiment, the adhesive of the tape 31 for preventing the floating of the wire rod 81 can be prevented from adhering to the wire rod 81, and problems such as wire breakage can be prevented. The ignition power generation coil 1 can be provided.

Embodiment 2 This embodiment is another embodiment in which the shape of the sheet member 22 is changed in Embodiment 1 as shown in FIG. That is, the sheet member 22 has a single inclined surface 221 on the outer peripheral surface 220, and has a supporting leg 223 on the inner side that abuts on the covering surface of the tape 13. Then, in addition to the void portion 15 formed between the sheet member 22 and the angle, the second void portion 16 is formed between the sheet member 22 and the covering surface of the tape 13. Others are similar to those of the first embodiment, and similar effects can be obtained.

Embodiment 3 This embodiment is another embodiment in which the shape of the sheet member 23 is changed in Embodiment 1 as shown in FIG. That is, the sheet member 23 has a single inclined surface 231 on its outer peripheral surface.
And a flat surface 233 parallel to the covering surface of the tape 13. Others are the same as in the first embodiment.

Embodiment 4 This embodiment is another embodiment in which the shape of the sheet member 24 is changed in Embodiment 1 as shown in FIG. That is, the entire outer peripheral surface 240 of the sheet member 24 forms an inclined surface. Then, the contact surface 2 of the sheet member 24 with the winding frame 10
An adhesive (silicone rubber or the like) for sealing that does not stick to the wire rod 81 is applied to the wires 42 and 234 and bonded to the winding frame 10 and then dried to wind the wire rod 81. Others are the same as those in the first embodiment.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an ignition power generation coil according to a first embodiment.

FIG. 2 is a sectional view taken along the line AA of FIGS.

FIG. 3 is an enlarged view of the vicinity of a corner of FIG.

FIG. 4 is a schematic enlarged view of the sheet member of Example 1.

FIG. 5 is an enlarged view of the vicinity of a corner of the ignition power generation coil of the second embodiment.

FIG. 6 is an enlarged view of the vicinity of a corner of the ignition power generation coil of the third embodiment.

FIG. 7 is an enlarged view of the vicinity of a corner of the ignition power generation coil of the fourth embodiment.

[Explanation of symbols]

 1. ． ． Ignition generator coil, 10. ． ． Reel, 11. ． ． Trunk, 12. ． ． Tsubabe, 13. ． ． Tape, 15. ． ． Voids, 21-24. ． ． Sheet member, 81. ． ． wire,

Claims (2)

[Claims] 1. A coil for igniting a magnet type generator of a two-wheeled vehicle, comprising a wire wound around a winding frame, the winding frame comprising a body around which the wire is wound, and both ends of the body. And a flange portion that forms a wall surface perpendicular to the body portion, and the outer peripheral surface of the body portion is covered with a tape for preventing floating of the wire material adhered with an adhesive, and At the corners of both ends of the winding frame where the body and the collar are orthogonal to each other, the wall surface of the collar and the tape-covered surface of the body contact both sides to make one or almost one round around the body. A sheet member is disposed, the sheet member has an outer peripheral surface having an inclined surface from the wall surface side toward the tape coating surface side, and between the inner peripheral surface of the sheet member and the corner portion. , A void is formed around the corner, and the wire rod has the sheath in the vicinity of both ends of the bobbin. An ignition power generation coil for a magnet-type power generator, wherein the power generation coil is wound along the outer peripheral surface of the heating member. 2. The sheet member according to claim 1, wherein:
It has either a closed ring shape with both ends in contact or an open ring shape with both ends in close proximity,
An ignition power generation coil for a magnet-type power generator, characterized in that the ignition power generation coil is formed by an elastically deformable member capable of expanding the gap between the both ends and fitting the body of the winding frame inward.