JP2008243930A - Ignition coil for internal combustion engine and method for terminating coil wire in coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for terminating a coil wire capable of maintaining a conductive state between a wire rod for connecting a wire and the coil wire by disconnecting the coil wire by fitting a throw-away binding section. <P>SOLUTION: The coil wire 41 with one end bound at a second terminal 14 for a diode is passed in parallel with the second terminal 14 between first and second holding projections 33 and 34 opposed with the second terminal 14 held therebetween and wound once on the outer periphery of the second holding projection 34. The coil wire 41 passed on the second terminal 14 is bound on the coil wire 41 bound at the second terminal 14, and the coil wire 41 is passed in parallel with the second terminal 14 between the first and second holding projections 33 and 34 and wound on a coil bobbin 21. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ignition coil for an internal combustion engine that supplies a high voltage for generating a spark discharge to an ignition plug of an internal combustion engine such as an automobile engine, and a terminal processing method for a coil wire in the coil. .

  The internal combustion engine ignition coil includes an insulating case, a coil core assembly housed in the insulating case, a plurality of low-voltage terminals (primary terminals) provided in a socket portion of the insulating case, and a bottom of the insulating case. In the high-voltage terminal mounting hole of the high-voltage tower section provided in the high-voltage terminal (secondary terminal), which is attached by, for example, press-fitting and connected to one end of the secondary coil of the coil core assembly, is filled in the insulation case And a thermosetting resin as an insulating material that performs high-voltage insulation between the components.

The coil core assembly includes a primary coil bobbin, a primary coil wound around the primary coil bobbin, a secondary coil bobbin disposed outside the primary coil, a secondary coil wound around the secondary coil bobbin, It consists of an iron core.
The iron core includes a center iron core that passes through the primary coil and the secondary coil, and an annular side iron core that is disposed outside the secondary coil so that the center iron core is disposed inside and forms a closed magnetic path together with the center iron core. It consists of and.
The primary coil, the secondary coil, the plurality of low voltage terminals, and the high voltage terminals are connected so as to form a predetermined circuit.
The secondary coil bobbin of the coil core assembly is prevented from being applied with a high voltage induced in the secondary coil at the start of energization of the primary coil to the spark plug, and is applied to the secondary coil at the end of energization of the primary coil. There has also been proposed a diode provided with a high voltage to be applied to the spark plug.

  FIG. 9 is an exploded perspective view showing the main part of the secondary coil bobbin of the ignition coil for an internal combustion engine provided with the above-described diode, and FIG.

  In FIG. 9, reference numeral 11 denotes a diode, a cylindrical diode body 12 provided with an anode and a cathode at both ends, and a first terminal 13 connected to one end of the diode body 12 and extending in the axial direction of the diode body 12. The second terminal 14 is connected to the other end of the diode body 12 and extends in the axial direction of the diode body 12.

Reference numeral 21 denotes a secondary coil bobbin, and a diode housing portion 22 for housing the diode 11 is provided at one end of the outer periphery.
The diode housing portion 22 holds a body housing portion 23 that houses the diode body 12 of the diode 11, a first terminal insertion portion 26 that fastens the first terminal 13 of the diode 11, and a second terminal 14 of the diode 11. And a second terminal holding portion 31.

The above-described main body housing portion 23 includes first and second standing wall pieces 24 and 25 that face each other and house the diode main body 12.
The first standing wall piece 24 is provided with a first terminal guide groove 24 a for guiding the first terminal 13 of the diode 11, and the second standing wall piece 25 is provided with a second terminal guide for guiding the second terminal 14 of the diode 11. A groove 25a is provided.

  The first terminal insertion portion 26 described above has a first base portion 27 located on the opposite side of the second standing wall piece 25 with respect to the first standing wall piece 24, and the first standing wall piece 24 on the first base portion 27. A pair of first and second protrusions 28 and 29 are provided so as to be opposed to each other so as to be orthogonal to each other and form a constricted portion 30a and a loose fitting portion 30b below the constricted portion 30a. ing.

The second terminal holding portion 31 described above has a second base portion 32 positioned on the opposite side of the first standing wall piece 24 with respect to the second standing wall piece 25, and the second standing wall piece 25 on the second base portion 32. A pair of first and second holding projections 33 and 34 are provided to face each other so as to be orthogonal to each other.
The first holding protrusion 33 is provided with a holding groove 33 a for positioning the second terminal 14 of the diode 11 and holding the second terminal 14 together with the second holding protrusion 34.

Next, attachment of the diode 11 to the diode housing portion 22 will be described.
First, the diode body 12 is positioned above the first standing wall piece 24 and the second standing wall piece 25, the first terminal 13 is positioned above the first terminal guide groove 24a, the first protrusion 28, and the second projection. The second terminal 14 is positioned at a position above the second terminal guide groove 25a and between the first holding protrusion 33 and the second holding protrusion 34. Then, the diode body 12 and the first and second terminals 13 and 14 are pushed into the secondary coil bobbin 21 side.

  Thus, when the diode body 12 is pushed into the secondary coil bobbin 21 side, the diode body 12 enters between the first standing wall piece 24 and the second standing wall piece 25, and the first terminal 13 enters the first terminal guide groove 24a. While being guided into the first terminal guide groove 24a, the second terminal 14 is guided by the second terminal guide groove 25a and into the second terminal guide groove 25a, so that the diode body 12 is placed in the body housing portion 23. Can be accommodated.

Further, when the first terminal 13 is pushed into the secondary coil bobbin 21 side, the first terminal 13 spreads between the first protrusion 28 and the second protrusion 29, that is, the constricted portion 30a is expanded, so the first terminal 13 passes through the constricted portion 30a and enters the loose fitting portion 30b, whereby the first terminal 13 can be inserted and held in the first terminal insertion portion 26.
When the first terminal 13 passes through the first protrusion 28 and the second protrusion 29, the first protrusion 28 and the second protrusion 29 return to the original state by their own elasticity, so that the narrowed portion 30a passes through the original state, that is, the first terminal 13 passes. It returns to the state where it cannot.

Further, when the second terminal 14 is pushed into the secondary coil bobbin 21 side, the second terminal 14 enters between the first holding protrusion 33 and the second holding protrusion 34, and the first holding protrusion 33 and the second holding protrusion 34 Since the second terminal 14 enters the holding groove 33a, the second terminal 14 is held between the first holding protrusion 33 and the second holding protrusion 34, thereby fixing the second terminal holding portion. The second terminal 14 can be held in the base 31.
When the second terminal 14 enters the holding groove 33a, the first holding protrusion 33 and the second holding protrusion 34 are restored to their original state by their own elasticity, so the first holding protrusion 33 and the second holding protrusion 34 returns to the state in which the second terminal 14 can be held and held.

  11 (a) to 11 (c) are explanatory views of terminal processing of the coil wire in the secondary coil of the conventional ignition coil for an internal combustion engine, and the same reference numerals are given to the same or corresponding parts as in FIG. 9 or FIG. The description is omitted.

  In FIG. 11, reference numeral 41 denotes a coil wire, which is wound around the outer periphery of the secondary coil bobbin 21 to form a secondary coil.

Next, terminal processing of the coil wire 41 in the secondary coil will be described.
First, as shown in FIG. 11A, as a wire connecting wire protruding from the first holding projection 33 and the second holding projection 34 to the opposite side to the second standing wall piece 25 (see FIG. 10). For example, after tangling one end portion of the coil wire 41 in the clockwise direction as viewed in the direction of the arrow A to the second terminal 14, the first holding protrusion 33 facing the coil wire 41 with the second terminal 14 interposed therebetween. And the second holding projection 34 are passed along the second holding projection 34 in parallel with the second terminal 14.
Then, as shown in FIGS. 11A to 11C, after the coil electric wire 41 is bent along the second holding projection 34, the coil electric wire 41 is wound around the outer periphery of the secondary coil bobbin 21 to form a secondary coil. (For example, refer to Patent Document 1).

JP 2006-179654 A

As described above, after one end of the coil wire 41 is entangled with the second terminal 14, the coil wire 41 is passed between the first holding projection 33 and the second holding projection 34 in parallel with the second terminal 14. When wound around the secondary coil bobbin 21, the coil wire 41 is sandwiched between the second terminal 14 and the second holding projection 34.
As described above, the coil wire 41 is sandwiched between the second terminal 14 and the second holding projection 34, the process proceeds to the assembly process, and the diode 11 is connected to the coil wire by the second terminal 14 due to an impact or the like in the assembly process. When rotating 41 in the pulling direction, the coil wire 41 is disconnected and the second terminal 14 and the coil wire 41 become non-conductive, resulting in a defective product.

  The present invention has been made to solve the above-described disadvantages, and is provided by disposing a coiled wire with a tangled portion, or by being sandwiched between a wire connecting wire and a holding projection. An ignition coil for an internal combustion engine and a terminal processing method for a coil wire that can maintain the electrical connection state between the wire for connecting the wire and the coil wire by not providing a portion of the coil wire to be disconnected. .

The present invention is as follows.
(1) One end of a coil wire is entangled with a wire connecting wire held by an opposing holding projection provided at one end of a secondary coil bobbin, and then the secondary coil bobbin passes through the coil wire between the holding projections. In the ignition coil for an internal combustion engine including a secondary coil wound around, the coil electric wire after one end portion is entangled with the wire connecting wire between the holding projections facing each other with the wire connecting wire interposed therebetween. At least one turn is wound around the outer periphery of one of the holding projections facing in parallel with the wire connecting wire, and the coiled wire passed over the wire connecting wire is entangled with the wire connecting wire. After entangled on the coil wire, the coil wire is wound around the secondary coil bobbin through the holding projections to form the secondary coil. That.
(2) One end of the coil wire is entangled with the wire connecting wire held by the opposing holding projection provided at one end of the secondary coil bobbin, and then the secondary coil bobbin passes through the coil wire between the holding projections. In the ignition coil for an internal combustion engine including a secondary coil wound around, the coil electric wire after one end is entangled with the electric wire connecting wire, both the holding projections facing each other with the electric wire connecting wire interposed therebetween The coil wire wound around at least one turn on the outer periphery and passed over the wire connecting wire is entangled on the coil wire entangled with the wire connecting wire, and then the coil wire is held. The secondary coil is formed by being wound around the secondary coil bobbin through the protrusions.
(3) The ignition coil for an internal combustion engine according to (1) or (2), wherein a rotation preventing means for preventing the wire connecting wire from rotating is provided.
(4) In a coil in which one end of a coil wire is entangled with a wire connecting wire held by an opposing holding projection provided at one end of the coil bobbin, and then the coil wire is wound around the coil bobbin through the holding projection In the terminal processing method of a coil electric wire, the coil electric wire after one end portion is entangled with the electric wire connecting wire is parallel to the electric wire connecting wire between the holding projections facing each other with the electric wire connecting wire interposed therebetween. The coil wire wound around at least one circumference of one of the holding protrusions facing each other through and passed over the wire connecting wire is entangled on the coil wire entangled with the wire connecting wire. After being attached, the coil electric wire is wound around the coil bobbin through the holding projection.
(5) In a coil in which one end of a coil electric wire is entangled with a wire connecting wire held by an opposing holding projection provided at one end of the coil bobbin, and then the coil electric wire is wound around the coil bobbin through the holding projection In the terminal processing method of the coil electric wire, the coil electric wire after one end is entangled with the electric wire connecting wire is wound around the outer circumference of both of the holding projections facing each other with the electric wire connecting wire interposed therebetween, After the coiled wire passed over the wire connecting wire is entangled on the coiled wire entangled with the wire connecting wire, the coil wire is passed through the holding projections to the secondary. It is characterized by being wound around a coil bobbin.
(6) In the terminal processing method of the coil electric wire in the coil according to (4) or (5), the wire connecting wire is prevented from rotating.

According to this invention, the holding protrusion which opposes the coil wire after one end portion is entangled with the wire for connecting the wire, passing between the holding protrusions facing the wire connecting wire in parallel with the wire for connecting the wire. The coil wire wound around at least one turn around the outer periphery of the wire and passing over the wire connecting wire is entangled on the coil wire entangled with the wire connecting wire, and then the coil wire is placed between the holding protrusions. Since the coil wire passed through the holding projection for the second time, the coil wire passed between the holding projections is sandwiched between the wire connecting wire and one holding projection. The coil wire passed between the holding projections for the first time is passed between the wire connecting wire and one holding projection so as to cross over the wire connecting wire from above. To do.
As described above, since the coil wire entangled on the coil wire entangled with the wire connecting wire first can maintain the conduction state between the wire connecting wire and the coil wire, first entangled with the wire connecting wire. The end portion of the coil electric wire that is attached and wound around one outer periphery of the holding projection can be used as a portion of the coil electric wire that is discarded.
Accordingly, even if the wire connecting wire rotates in the direction of pulling the coil electric wire, the discarded portion of the coil electric wire sandwiched between the wire connecting wire and the one holding projection through the holding projections for the first time Since the coil wire and the wire connecting wire connected on the tie-down portion are electrically connected, the conductive state between the wire connecting wire and the coil wire is maintained, and the ignition coil for the internal combustion engine Or the coil will not be defective.
In addition, the coil electric wire after one end portion is entangled with the wire connecting wire is wound around at least one turn on both outer circumferences of the holding protrusions facing each other with the wire connecting wire interposed therebetween, and is passed over the wire connecting wire. After the coil wire is entangled on the coil wire entangled with the wire connecting wire, the coil wire is wound around the secondary coil bobbin through the holding projection, so the coil wire passing between the holding projections is held by the holding projection. It passes over the coiled wire wound around the outer periphery of the wire.
Therefore, even if the wire connecting wire rotates in the direction of pulling the coil electric wire, there is no portion of the coil electric wire that is sandwiched between the wire connecting wire and the holding projection, and thus the coil electric wire does not break. The continuity between the connecting wire and the coil wire is maintained, and the ignition coil or coil for the internal combustion engine does not become a defective product.
Then, since the wire connecting wire is prevented from rotating, the wire connecting wire does not rotate in the direction of pulling the coil wire, and the conduction state between the wire connecting wire and the coil wire is maintained, so that the ignition coil for the internal combustion engine Or the coil will not be defective.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 (a), 1 (b), 2 (a), 2 (b), 3 (a), and 3 (b) are coils in a secondary coil of an internal combustion engine ignition coil according to a first embodiment of the present invention. It is explanatory drawing of the terminal process of an electric wire, attaches | subjects the same code | symbol to the part which is the same as that of FIGS. 9-11, or an equivalent part, and abbreviate | omits the description.

Next, terminal processing of the coil wire 41 in the secondary coil according to the first embodiment of the present invention will be described.
First, as shown in FIG. 1A, as a wire connecting wire projecting from between the first holding projection 33 and the second holding projection 34 to the opposite side of the second standing wall piece 25 (see FIG. 10). For example, after tangling one end portion of the coil electric wire 41 in the clockwise direction when viewed from the arrow B direction, the first holding protrusion 33 facing the coil electric wire 41 with the second terminal 14 interposed therebetween is seen. And the second holding projection 34 are passed along the second holding projection 34 in parallel with the second terminal 14.
Then, as shown in FIGS. 1A and 1B, the coil wire 41 is wound around the outer periphery of the second holding projection 34 at least once, in this embodiment, only once around the outer periphery of the second holding projection 34.

  Furthermore, as shown in FIGS. 2A and 2B, the coil wire 41 that has passed over the second terminal 14 is entangled forward (first time) with the second terminal 14. On the upper side (first time), the coil wire 41 is tangled in the clockwise direction as viewed from the direction of arrow B in FIG.

Next, as shown in FIGS. 3A and 3B, the coil wire 41 of the front (second time) is placed on the coil wire 41 entangled with the second terminal 14 before (second time). After the coil wire 41 is entangled in the clockwise direction when viewed from the arrow B direction in FIG. 3A from the entanglement end side to the entanglement start side, the coil wire 41 is again connected to the first holding projection 33 and the second It passes along the 2nd holding protrusion 34 in parallel with the 2nd terminal 14 between holding | maintenance protrusion 34, and passes on the front coil electric wire 41. FIG.
Then, as shown in FIGS. 3A and 3B, after the coil electric wire 41 is bent along the second holding projection 34, the coil electric wire 41 is wound around the outer periphery of the secondary coil bobbin 21 to form a secondary coil. To do.

As described above, according to the first embodiment of the present invention, the first and second holding projections that oppose the coil wire 41 after the one end portion is entangled with the second terminal 14 with the second terminal 14 interposed therebetween. A coil wire 41 is wound around the second terminal 14 and is wound around the outer periphery of the second holding projection 34 through the second terminal 14 in parallel with the second terminal 14. Since the coil wire 41 is wound around the secondary coil bobbin 21 through the space between the first and second holding projections 33 and 34 after being entangled on 41, the space between the first and second holding projections 33 and 34 is 2 The coil wire 41 passing through the second time passes over the first time when the coil wire 41 passed between the first and second holding projections 33 and 34 is sandwiched between the second terminal 14 and the second holding projection 34. To do.
Thus, since the coil wire 41 entangled on the coil wire 41 entangled with the second terminal 14 first can maintain the conduction state between the second terminal 14 and the coil wire 41, the second terminal first 14, the end portion of the coil electric wire 41 wound around the outer periphery of the second holding projection 34 can be used as a discarded portion of the coil electric wire 41.
Therefore, even if the second terminal 14 rotates in the direction of pulling the coil wire 41, the second terminal 14 is sandwiched between the second terminal 14 and the second holding projection 34 through the first and second holding projections 33, 34 for the first time. The coiled portion of the coiled wire 41 is disconnected, and the coiled wire 41 and the second terminal 14 that are tangled on the discarded portion are electrically connected, so that the second terminal 14 and the coiled wire 41 are connected. And the ignition coil for the internal combustion engine or the coil does not become a defective product.

  FIG. 4 is an exploded perspective view showing a main part of a secondary coil bobbin of an ignition coil for an internal combustion engine according to a second embodiment of the present invention. FIG. 5 is a diagram in which a diode is attached to the diode housing portion in FIG. FIG. 6 is a perspective view showing a state in which this is prevented, and the same reference numerals are assigned to the same or corresponding parts as in FIGS. 1 to 3 or FIGS.

  In FIG. 4, reference numeral 28 a denotes a locking groove as a rotation preventing means for preventing the second terminal 14 (wire connecting wire) of the diode 11 from rotating, and the first standing wall piece 24 of the first protrusion 28 and It is provided on the opposite side.

Next, attachment of the diode 11 to the diode housing portion 22 will be described with respect to portions different from the conventional example shown in FIGS.
First, as in the conventional example shown in FIGS. 9 and 10, the diode 11 is attached to the diode housing portion 22.
Then, the first terminal 13 of the diode 11 protruding from the space between the first protrusion 28 and the second protrusion 29 to the opposite side of the first standing wall piece 24 is bent into the locking groove 28a as shown in FIG.
As described above, when the first terminal 13 is bent into the locking groove 28a, the first terminal 13 is prevented and prevented from rotating, thereby preventing and preventing the second terminal 14 from rotating.
In addition, since the terminal process of the coil electric wire 41 in the secondary coil of this 2nd Example is processed similarly to a 1st Example, the description is abbreviate | omitted.

As described above, also in the second embodiment of the present invention, the same effect as in the first embodiment can be obtained.
And the rotation prevention means (locking groove 28a) which prevents that the 2nd terminal 14 of the diode 11 rotates is provided, and since the 2nd terminal 14 was prevented from rotating, the 2nd terminal 14 connected the coil electric wire 41. It does not rotate in the pulling direction, the conduction state between the second terminal 14 and the coil wire 41 is maintained, and the internal combustion engine ignition coil or coil does not become a defective product.

  FIGS. 6 (a), 6 (b), 7 (a), 7 (b), 8 (a), and 8 (b) are coils in a secondary coil of an internal combustion engine ignition coil according to a third embodiment of the present invention. It is explanatory drawing which shows the terminal process of an electric wire, attaches | subjects the same code | symbol to the same or equivalent part as FIGS. 1-5 or FIGS. 9-11, and abbreviate | omits the description.

Next, terminal processing of the coil wire 41 in the secondary coil according to the third embodiment of the present invention will be described.
First, as shown in FIG. 6 (a), for connecting an electric wire protruding from between the first holding projection 33 and the second holding projection 34 to the opposite side of the second standing wall piece 25 (see FIG. 5 or FIG. 10). For example, after tangling one end portion of the coil wire 41 in the clockwise direction to the second terminal 14 as the wire as viewed from the direction of the arrow C, the coil wire 41 is shown in FIGS. Thus, at least one turn on the outer periphery of the first and second holding projections 33 and 34 facing each other across the second terminal 14, in this embodiment, only one turn on the outer periphery of the first and second holding projections 33 and 34. Wind the electric wire 41.

  And as shown to Fig.7 (a), (b), the coil electric wire 41 which passed on the 2nd terminal 14 of the coil electric wire 41 entangled in front (1st time) to the 2nd terminal 14 is shown. On the top (first time), the coil wire 41 is tangled in the clockwise direction as viewed from the direction of arrow C in FIG.

Next, as shown in FIGS. 8A and 8B, the coil wire 41 of the front (second time) is placed on the coil wire 41 entangled with the second terminal 14 before (second time). After the coil wire 41 is tangled in the clockwise direction when viewed from the direction of arrow C in FIG. 8A from the entanglement end side to the entanglement start side, the coil wire 41 is held by the first holding projection 33 and the second holding. The projection 34 is passed along the second holding projection 34 in parallel with the second terminal 14.
Then, as shown in FIGS. 8A and 8B, after the coil electric wire 41 is bent along the second holding projection 34, the coil electric wire 41 is wound around the outer periphery of the secondary coil bobbin 21 to form a secondary coil. To do.

As described above, according to the third embodiment of the present invention, the first and second holding projections that oppose the coil wire 41 after the one end is entangled with the second terminal 14 with the second terminal 14 interposed therebetween. After winding the coil wire 41 wound around the outer periphery of both of the second terminal 14 and the coil wire 41 entangled with the second terminal 14, the coil wire 41 is Since the secondary coil bobbin 21 is wound around the first and second holding projections 33 and 34, the coil wire 41 passing between the first and second holding projections 33 and 34 is connected to the first and second holding projections 33 and 34. It passes over the coil wire 41 wound around the outer periphery.
Therefore, even if the second terminal 14 rotates in the direction of pulling the coil electric wire 41, there is no portion of the coil electric wire 41 that is sandwiched between the second terminal 14 and the first and second holding projections 33 and 34 and disconnected. Therefore, the conductive state between the second terminal 14 and the coil wire 41 is maintained without the coil wire 41 being disconnected, and the internal combustion engine ignition coil or coil is not defective.

In the above-described embodiment, the example in which the second terminal 14 (lead) of the diode 11 is the wire connecting wire is shown, but a normal wire may be used as the wire connecting wire.
Moreover, although the example which used the latching groove 28a as the rotation prevention means was shown, as long as the rotation prevention means is a structure which can prevent a wire connecting wire from rotating, another structure, for example, a wire connecting wire with a fixing protrusion, is used. It is good also as a structure etc. which are inserted | pinched so that it may not rotate.
Moreover, although the rotation prevention means which did not rotate the 2nd terminal 14 (wire connection wire) indirectly was shown in the example, the rotation prevention means which prevents the wire connection wire from rotating directly may be used. .
In the first and second embodiments, when the coil wire 41 is passed between the first and second holding projections 33 and 34 for the second time, the coil wire 41 is passed over the coil wire 41 for the first time. When the electric wire 41 passes between the first and second holding projections 33 and 34 for the second time, the electric wire 41 passes over the second terminal 14 (wire connecting wire) from above the first coil electric wire 41 and passes through. Even if it makes it, the same effect can be acquired.
In the third embodiment, when the coil wire 41 is passed between the first and second holding projections 33, 34, along the second holding projection 34 (second terminal 14 (wire connecting wire)) Even if the coil wire 41 is passed through the second terminal 14 (wire connecting wire) when passing between the first and second holding projections 33 and 34, the same applies. Effects can be obtained.
In the third embodiment, as in the second embodiment, it is desirable to provide a locking groove 28a to prevent or prevent the second terminal 14 (wire connecting wire) from rotating.

(A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 1st Example of this invention. (A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 1st Example of this invention. (A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 1st Example of this invention. It is a disassembled perspective view which shows the principal part of the secondary coil bobbin of the ignition coil for internal combustion engines which is 2nd Example of this invention. FIG. 5 is a perspective view of a state where the diode is attached to the diode housing portion in FIG. 4 and the first terminal is prevented from rotating. (A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 3rd Example of this invention. (A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 3rd Example of this invention. (A), (b) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the ignition coil for internal combustion engines which is 3rd Example of this invention. It is a disassembled perspective view which shows the principal part of the secondary coil bobbin of the ignition coil for internal combustion engines provided with the diode. FIG. 10 is a perspective view of a state where the diode is attached to the diode housing portion in FIG. 9. (A)-(c) is explanatory drawing of the terminal process of the coil electric wire in the secondary coil of the conventional ignition coil for internal combustion engines.

Explanation of symbols

11 diode 12 diode body 13 first terminal 14 second terminal (wire connecting wire)
21 Secondary coil bobbin 22 Diode housing portion 23 Main body housing portion 24 First standing wall piece 24a First terminal guide groove 25 Second standing wall piece 25a Second terminal guide groove 26 First terminal insertion portion 27 First base portion 28 First protrusion 28a Locking groove (rotation prevention means)
29 2nd protrusion 30a Narrow part 30b Fitting part 31 2nd terminal holding part 32 2nd base part 33 1st holding protrusion 33a Holding groove 34 2nd holding protrusion 41 Coil electric wire

Claims (6)

One end of the coil electric wire is entangled with the wire connecting wire held by the opposite holding protrusion provided at one end of the secondary coil bobbin, and then the coil electric wire is wound around the secondary coil bobbin through the holding protrusion. In an internal combustion engine ignition coil comprising a secondary coil,
The holding projection facing the coil wire after the one end portion is entangled with the wire connecting wire in parallel with the wire connecting wire between the holding projections facing each other across the wire connecting wire The coil wire wound around at least one turn on one outer periphery of the wire and passing over the wire connecting wire is entangled on the coil wire entangled with the wire connecting wire. The secondary coil is formed by winding the secondary coil bobbin through the holding projections,
An ignition coil for an internal combustion engine. One end of the coil electric wire is entangled with the wire connecting wire held by the opposite holding protrusion provided at one end of the secondary coil bobbin, and then the coil electric wire is wound around the secondary coil bobbin through the holding protrusion. In an internal combustion engine ignition coil comprising a secondary coil,
The coil electric wire after one end portion is entangled with the wire connecting wire is wound around at least one circumference on both outer sides of the holding projections facing each other with the wire connecting wire interposed therebetween, and the wire connecting wire is placed on the wire connecting wire. After the coiled wire that has been passed is entangled on the coiled wire entangled with the wire connecting wire, the coiled wire is wound around the secondary coil bobbin through the holding projections, and the secondary coil Formed,
An ignition coil for an internal combustion engine. The internal combustion engine ignition coil according to claim 1 or 2,
Provided with an anti-rotation means for preventing the wire connecting wire from rotating;
An ignition coil for an internal combustion engine. One end of the coil wire is entangled with a wire connecting wire held by an opposing holding projection provided at one end of the coil bobbin, and then the coil wire is wound around the coil bobbin through the holding projection. In the terminal processing method,
The holding projection facing the coil wire after the one end portion is entangled with the wire connecting wire in parallel with the wire connecting wire between the holding projections facing each other across the wire connecting wire The coil wire wound around at least one turn on one outer periphery of the wire and passing over the wire connecting wire is entangled on the coil wire entangled with the wire connecting wire. Wrap around the coil bobbin through the holding projection,
The terminal processing method of the coil electric wire in the coil characterized by the above-mentioned. One end of the coil wire is entangled with a wire connecting wire held by an opposing holding projection provided at one end of the coil bobbin, and then the coil wire is wound around the coil bobbin through the holding projection. In the terminal processing method,
The coil electric wire after one end portion is entangled with the wire connecting wire is wound around at least one circumference on both outer sides of the holding projections facing each other with the wire connecting wire interposed therebetween, and the wire connecting wire is placed on the wire connecting wire. The coiled wire that has been passed is entangled on the coiled wire entangled with the wire connecting wire, and then the coiled wire is wound around the secondary coil bobbin through the holding projections,
The terminal processing method of the coil electric wire in the coil characterized by the above-mentioned. In the terminal processing method of the coil electric wire in the coil of Claim 4 or Claim 5,
The wire connecting wire was prevented from rotating,
The terminal processing method of the coil electric wire in the coil characterized by the above-mentioned.

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