JP2001210514A - Terminal process structure for winding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal process structure for a winding that can prevent looseness of two kinds of electric wire at a lead out part. SOLUTION: A first electric wire 2 can prevent looseness by being tightened with a second electric wire 3 wound around a periphery part of the first guide part 6c via a first guide part 6c. Due to its of being wound around the periphery part of the first guide part 6c and taken out via a second guiding part 6b, the second electric wire 3 is acted on by friction, and then a suitable tension is exerted on it. This tension can prevent looseness of the second electric wire 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is suitable for use in an electromagnet device used for a magnet switch of a starting motor for an internal combustion engine (hereinafter referred to as a starter), for example.
In particular, the present invention relates to a winding terminal processing structure for extracting winding ends of two types of electric wires wound around a bobbin from a lead-out portion which is a common extraction portion of the two types of electric wires.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No.
There is No. 3 publication.

[0003] In this publication, a terminal portion of one kind of electric wire is passed through a notch portion, wound around the outer periphery of the projection, and then slightly unwound to form a gap between the outer periphery of the projection and the electric wire. In addition, a configuration is disclosed in which the concentration of stress on the electric wire near the take-out portion due to vehicle vibration or the like is reduced.

[0004]

In the structure of the prior art, the wire is slightly unwound to form a gap between the outer periphery of the protrusion and the wire, so that the wire is wound around the bobbin. Looseness occurs, causing a problem that the wires come into contact with each other or the frame due to vibration and are rubbed and deteriorated in insulation.

[0005] In view of the above problems, an object of the present invention is to provide a winding terminal processing structure capable of preventing two types of electric wires from being loosened at a take-out portion.

[0006]

The present invention employs the technical means described in claims 1 to 5 to achieve the above object.

According to the first aspect of the present invention, the outlet portion has a substantially cylindrical first shape having a cutout groove penetrating the first electric wire.
And a second guide portion disposed close to the first guide portion and locking the second wire, the first guide portion having the first wire inserted through the notch groove. A second wire is wound around the outer periphery of the first wire, and the second wire is taken out through the second guide portion. Therefore, the first wire is connected to the first guide portion through the first guide portion. Since the second electric wire is wound around the outer periphery of the first guide portion and taken out through the second guide portion, the second electric wire is wound around the first guide portion and tightened by the second electric wire wound around the outer peripheral portion. Appropriate tension is applied by frictional force, and this tension can prevent the second electric wire from becoming loose.

According to the invention described in claim 2, according to claim 1
According to the invention, the first electric wire is wound inside the bobbin and the second electric wire is wound outside the bobbin. Therefore, the first electric wire is further tightened inward by the second electric wire, so that the first electric wire is further loosened. Can be prevented.

According to the invention described in claim 3, according to claim 1 of the present invention,
Further, the first electric wire is a thick electric wire, and the second electric wire is a second electric wire.
Since the electric wire is a thin electric wire, the second electric wire having a larger deformation amount than the first electric wire can be easily deformed and easily processed.

[0010] According to the fourth aspect of the present invention, the first aspect is provided.
According to the invention, the first guide portion is substantially U-shaped or substantially V-shaped, so that the first electric wire is U-shaped or V-shaped.
It is easy to be stably installed on the bottom of the first guide portion having the letter shape.

According to the invention described in claim 5, according to claim 1,
Further, a hook portion is provided in a part of the first guide portion, and at least a part of the second electric wire wound around the outer peripheral portion of the first guide portion passes through the hook portion. Is strongly fixed by the hook portion and a large tension is applied to the second electric wire, so that loosening of the second electric wire is more strongly prevented.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a cross-sectional view along a central axis showing the structure of a starter electromagnetic switch as an example to which the present invention is applied.

In FIG. 6, a cylindrical bobbin 1 is formed of an insulating member and has bobbin flanges 1e and 1f at both ends. The exciting core 7 is inserted from one end side of the bobbin 1, and the exciting core flange portion 7a is fixed by overlapping the bobbin flange portion 1e. A part of the exciting core flange portion 7a is a thin electric wire parallel to the central axis. A protruding outlet portion 1a having a portion 5a and a thick wire passing portion 5b is formed. Then, the thick wire 2 and the thin wire 3 are connected to each other,
It is taken from 0. The exciting coils 2a and 3a are wound around the bobbin 1, and the thick wire 2 is wound inside and the thin wire 3 is wound outside. The case 8 is formed of a magnetic material. The plunger 9 is inserted from the other end of the bobbin 1 and is slidably assembled in the direction of the central axis (the vertical direction in FIG. 6). The contact rod 10 is held on the central axis of the excitation core 7. The movable contact 11 is the contact rod 1
0 is supported by the insulating ring 12. A cap 13 made of an insulating resin is attached to one end of the case 8 by fixing a fixed contact 14 with a lock nut 15.
16a is a return spring of the contact rod 10, 16b is a contact spring of the contact movable contact 11, and 16c is a return spring of the plunger 9.

FIG. 7 is a circuit diagram of the starter. In FIG. 7, 17 is a starter motor, 18 is a battery, and 19 is a start switch.

In the above configuration, when the start switch 19 is turned on, the current of the battery 18 flows through the thick electric wire 2 and the thin electric wire 3 constituting the exciting coils 2a, 3a, and the plunger 9 is turned on.
Is excited against the return spring 16 c of the plunger 9,
Further, the contact rod 10 is pushed up by the plunger 9 against the return spring 16a of the contact rod 10. This allows the starter motor 17 to be energized by contacting the movable contact 11 with a predetermined contact pressure by the contact spring 16b of the contact movable contact 11 so as to short-circuit the fixed contacts 14 separated from each other. 17 is driven to rotate.

Next, the exciting coils 2a, 3a in FIG.
The detailed structure of the outlet portion 1a will be described with reference to FIGS.

FIG. 1 is a plan view of an outlet portion 1a of the bobbin 1.
FIG. 2 is a sectional view taken along section II-II in FIG. 1, and FIG. 3 is a perspective view of a hooking portion 7 provided on a thick wire insertion guide 6c.

The lead portion 1a of the bobbin 1 is formed of an insulating member common to the bobbin 1. Among the outlet portions 1a, the thin wire insertion guide 6a and the thin wire pull-out guide 6
“b” is disposed close to and surrounds the thick wire insertion guide 6c.

The distance between the guides 6a and 6c, 6b and 6c, which will be the first thin wire passing portion 5a and the second thin wire passing portion 5c,
After the thin wire 3 is wound around the thick wire insertion guide 6c, the gap between the thin wire 3 and the thin wire insertion guide 6a and the thin wire extraction guide 6b is equal to or slightly larger than the diameter of the thin wire 3. So that there is not much gap.

The thin wire pulling guide 6b is provided with a notch groove 61 along the longitudinal direction thereof, and the thin wire 3 wound around the thick wire insertion guide 6c is provided with the notch groove 61.
And take it out.

The thick wire insertion guide 6c has a substantially cylindrical shape and is substantially U-shaped, and a thick wire passage portion 5b having a cutout groove 62 in the longitudinal direction thereof to facilitate insertion of the thick wire 2.
Is provided.

Then, the thin wire 3 is inserted into the first thin wire passing portion 5a.
Wire insertion guide 6c through which the thick wire 2 is inserted
And wrap it around.

Further, the thick wire insertion guide 6c is
Hook 7 formed by cutting out wall 6d of thick wire insertion guide 6c so as not to loosen when it is wound.
The thin wire 3 is wound around the thick wire insertion guide 6c through the hook portion 7, and is taken out through the notch groove of the thin wire pull-out guide 6b.

By this winding and the locking process in the notch groove 61, a frictional force acts between the thin wire 3 and the thick wire insertion guide 6c, and an appropriate tension is applied, and the thin wire 3 is loosened. Can be prevented. In addition, thick wire 2
Can be prevented from being loosened in the bobbin 1 by being tightened from the outside by the thin wire 3.

Further, since the thin electric wire 3 is wound around the opening of the thick electric wire passing portion 5b, the thin electric wire 3 becomes an obstacle, so that the thick electric wire 2 can be prevented from jumping outward in the radial direction.

As shown in this example, when the structure of the present invention is applied to an electromagnetic switch for a starter, in the vibration test of the starter alone and the intermittent engine load test, the conventional structure does not satisfy the durability specification in terms of insulation characteristics. On the other hand, in the case of the structure of the present invention, the insulation characteristics between the windings could be improved, so that the durability specifications could be satisfied.

FIGS. 4 and 5 relate to another embodiment of the present invention. FIG. 4 is a plan view of the lead-out portion 1a of the bobbin 1, and FIG. 5 is a cross-sectional view taken along the line VV in FIG.

In the embodiment shown in FIGS. 1 to 3, the thin wire 3
There is a thin wire insertion guide 6a to make it easier to wind, but once it is wound, the thin wire insertion guide 6a
Is unnecessary, so that the winding of the present invention is possible even in the other embodiment without the thin wire insertion guide 6a.

The thick wire insertion guide 6c has a U-shape as an example of a substantially cylindrical shape, but may have another shape such as a substantially V-shape or a substantially U-shape.

[Brief description of the drawings]

FIG. 1 relates to an embodiment of the present invention, wherein a bobbin 1 is provided.
It is a top view of the outlet part 1a.

FIG. 2 relates to one embodiment of the present invention and is a cross-sectional view taken along section II-II in FIG.

FIG. 3 relates to one embodiment of the present invention, and is a perspective view of a hook portion 7 provided on a thick wire insertion guide 6c.

FIG. 4 relates to another embodiment of the present invention and is a plan view of an outlet portion 1a of a bobbin 1.

FIG. 5 relates to another embodiment of the present invention, and is a cross-sectional view taken along line VV in FIG. 4;

FIG. 6 is a cross-sectional view along a central axis showing a structure of a starter electromagnetic switch to which the present invention is applied.

FIG. 7 is a circuit diagram of a starter.

[Explanation of symbols]

 Reference Signs List 1 bobbin 1a outlet section 2 thick electric wire (first electric wire) 3 thin electric wire (second electric wire) 6b thin electric wire extraction guide (second guide portion) 6c thick electric wire insertion guide (first guide portion) 7 hook portion 62 Notch groove

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhiro Ando 1-1-1 Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (reference) 5E048 AD02 CB03 CB05

Claims (5)

[Claims] 1. A winding terminal processing in which first and second electric wires are wound around a bobbin, and winding end portions of the first and second electric wires are taken out from a common lead portion provided on the bobbin. In the above structure, the outlet portion connects a substantially cylindrical first guide portion having a notch groove through which the first electric wire is inserted, and the second electric wire disposed in proximity to the first guide portion. A second guide portion for stopping the first wire portion, wherein the second wire portion is wound around an outer peripheral portion of the first guide portion in which the first wire portion is inserted into the notch groove. A winding terminal processing structure, wherein an electric wire is taken out through the second guide portion. 2. The structure according to claim 1, wherein the first electric wire is wound inside the bobbin, and the second electric wire is wound outside the bobbin. 3. The winding terminal processing structure according to claim 1, wherein the first electric wire is a thick electric wire, and the second electric wire is a thin electric wire. 4. The winding terminal processing structure according to claim 1, wherein said first guide portion is substantially U-shaped or substantially V-shaped. 5. A hook portion is provided on a part of the first guide portion, and at least a part of the second electric wire wound around an outer peripheral portion of the first guide portion passes through the hook portion. The winding terminal processing structure according to claim 1, wherein: