JPH0337218Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a lead wire connecting device for a transformer that connects a coil lead wire and an external lead wire using a relay terminal plate on a coil wound around a coil bobbin. It is related to.

[Conventional technology]

Conventionally, as shown in Utility Model Application Publication No. 58-116208,
A relay terminal plate is fitted across the flanges on both sides of the coil bobbin around which the coil is wound, connecting the coil lead wire and the external lead wire, and a plurality of lead wire holders are arranged in parallel on the upper surface of the relay terminal plate. There is a lead wire connecting device for a transformer that is designed to hold the outer skin of an external lead wire by a portion.

The lead wire holding section fits the outer skin of the external lead wire into a lead wire fitting recess between a number of protrusions integrally formed on the upper surface of the terminal board, and holds the lead wire at the opening edge of the fitting recess. The convex portion prevents the outer skin portion from coming off.

[Problem that the invention attempts to solve]

In this conventional lead wire holding section, the outer skin of the lead wire is held only by the presser protrusion, which opens and closes due to the elasticity of the protrusion, so it is easy to attach the lead wire to the lead wire holding section. However, it is difficult to reliably prevent the outer sheath portion of the lead wire from coming off upward, and there is a problem in that the outer sheath portion easily separates upward from the terminal board.

The object of the present invention is to reliably prevent the possibility that the lead wire outer sheath will separate from the relay terminal board without impairing the ease of attaching the lead wire outer sheath to the relay terminal board.

[Means for solving problems]

In the present invention, a relay terminal plate 5 for connecting a coil lead wire 14 and an external lead wire 13 is fitted across the flanges 3 and 4 on both sides of a coil bobbin 2 around which a coil is wound. This is an improved lead wire connecting device for a transformer in which the outer skin portion 13a of the external lead wire 13 is held by a plurality of lead wire holding portions 7 arranged in parallel on the top surface of the transformer.

That is, an insulating cover 6 is fitted over the entire surface of the relay terminal board 5, and an engaging portion 23 that engages the relay terminal board 5 and the insulating cover 6 with each other when the relay terminal board 5 and the insulating cover 6 are fitted together,
28 were established. Furthermore, the lead wire holding portion 7 of the relay terminal board 5 is formed in an inverted L shape, and has a lead wire insertion notch 17 on the side surface, and the insulating cover 6 is provided with the lead wire holding portion 7 of each of the lead wire holding portions 7. A plurality of protrusions 26 are provided to protrude between the lead wire insertion notches 17 and close the lead wire insertion notches 17.

[Effect]

In the present invention, the coil lead wire 14 and the external lead wire 13 are connected on the relay terminal board 5, and the outer skin part 13a of the external lead wire 13 is connected to the lead wire holding part 7.
The terminal board 5 is fitted and held through the lead wire insertion notch 17 on the side surface, and the insulating cover 6 is fitted and engaged onto the terminal board 5, and the protrusion 26 of the insulating cover 6 allows the lead wire insertion notch to be inserted into the lead wire insertion notch. 17 is closed to ensure that the lead wire is held by the holding portion 7.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.

As shown in FIG. 1, an inner coil bobbin (hereinafter referred to as an inner hobbin) 1, an outer coil bobbin (hereinafter referred to as an outer hobbin) 2 that fits on the outside of the inner hobbin 1, and an outer hobbin 2. a relay terminal plate 5 fitted across the flange parts 3 and 4 on both sides;
An insulating cover 6 that is fitted over the entire upper surface of the relay terminal board 5 is molded from synthetic resin.

The relay terminal board 5 has a plurality of lead wire holding portions 7 arranged side by side on the upper surface of one side thereof, and a plurality of lead wire folding recesses 8 arranged side by side on the upper surface of the other side thereof.
This lead wire folding recess 8 is integrally provided with a lead wire winding portion 9.

Then, as shown in FIG.
1 and an outer coil 12.
and the outer bobbin 2 formed by winding the bobbin, and further,
The bent portions 5a on both sides of the terminal plate 5 are fitted onto the flanges 3 and 4 of the outer bobbin 2, and the outer skin portion 13a of the outer lead wire 13 is fixedly held by the lead wire holding portion 7 on the terminal plate 5. At the same time, the core wire 13b of the lead wire is wound around the lead wire winding part 9, the lead wire 14 of the coil 11 is entwined with the tip of the core wire 13b, and both wires are soldered, etc. It is stored inside the recess 8.

As shown in FIG. 3, each of the lead wire holding parts 7
is L-shaped with a broken wire and a lead wire insertion notch 17 is provided on the side surface. Further, the lead wire winding portion 9 is provided with a groove 18 into which the core wire 13b is fitted and a hole 19 into which the core wire 13b is inserted. Each of the lead wire holding portions 7 includes a lead wire fitting recess 2 provided in a pocket portion 21 integrally formed with the flange portion 4 of the outer bobbin 2.
Further, each of the lead wire folding recesses 8 is provided on an extension line of each of the lead wire holding parts 7.

Furthermore, as shown in FIG. 3, a wedge-shaped engagement convex portion 23 as an engagement portion that engages with the insulating cover 6 is integrated on the outer surface of the leftmost lead wire holding portion 7 and the lead wire folding recess 8. At the same time, a similar wedge-shaped engagement convex portion is integrally molded on the opposite outer surface.

Further, as shown in FIG. 3, the insulating cover 6
A plurality of protrusions 26 are provided on the lower surface facing the terminal plate 5 to be inserted between the respective lead wire holding parts 7, and the protrusions 26 are fitted on both sides of the terminal plate 5. The bent part 27 is integrally molded,
Further, the terminal plate 5 is attached to the bent portions 27 on both sides.
Engagement holes 28 are provided as engagement portions that engage with the engagement convex portions 23 at four locations.

Returning to FIG. 1, a pair of terminal plate locking protrusions 31 are integrally molded on both upper sides of the flange portion 3 on one side of the outer bobbin 2, and are integrally formed with the flange portion 4 on the other side. Terminal plate locking holes 32 are provided on both sides of the pocket portion 21 . Further, a wedge-shaped convex portion 34 is integrally molded on the leg portion 33 which is integrally molded with the lead wire holding portion 7 and the lead wire folding recess portion 8 of the terminal plate 5.

Then, as shown in FIG. 4, the outer bobbin 2
When the terminal plate 5 is fitted from above to the flanges 3 and 4 on both sides, the four wedge-shaped protrusions 34 of the terminal plate 5 are located between the locking protrusions 31 and in the locking hole 32 of the outer bobbin 2. The terminal board 5 will not come off due to the engagement.

Furthermore, as shown in FIGS. 4 and 5, when the insulating cover 6 is fitted onto the terminal board 5, the four engaging protrusions 23 of the terminal board 5 and the engaging holes 28 of the cover 6 are connected. They engage with each other, and the insulating cover 6 is integrated with the terminal board 5.

As shown in FIG. 5, when the insulating cover 6 is fitted, each protrusion 26 of the cover is attached to the terminal board 5.
The protrusion 26 is inserted between the protrusions 37 integrally formed on the lead wire holding part 7 or between the protrusion part 37 and the lead wire holding part 7, and the lead wire insertion notch 17 on the side surface of the lead wire holding part 7 is inserted by the protrusion 26. Close. This prevents the lead wire fitted into the lead wire holding portion 7 from coming off.

As shown in FIG. 6, the terminal plate locking convex portions 31 on both sides integrally molded on the flange portion 3 of the outer bobbin 2 fit into the recesses 42 of the flange portion 41 on one side of the inner bobbin 1. Positioned. Furthermore, the first
As shown in the figure and FIG. 2, the lower end 41a of the one side flange portion 41 of the inner bobbin 1 is positioned by engaging with the convex portion 43 integrally formed on the one side flange portion 3 of the outer bobbin 2, and , the flange portion 44 on the other side of the inner bobbin 1 is inserted into the inner space 45 of the outer bobbin 2, and the upper and lower convex portions 46 protruding from the flange portion 44 are inserted into the opening 4 of the other side flange portion 4 of the outer bobbin 2.
7 and is positioned. In this way,
Both bobbins 1 and 2 are closely fitted and do not shift in position.

FIG. 7 shows an embodiment of the lead wire connection procedure, in which the core wire 1 of the external lead wire 13 is
3b into the hole 19 of the lead wire winding part 9,
After the outer skin portion 13a of the lead wire is inserted between each lead wire holding portion 7, it is shifted laterally and inserted into the holding portion 7 from the lead wire insertion notch 17 as shown in b. Next, as shown in b, the lead wire winding portion 9
The core wire 13b wound around the coil 11 and the lead wire 14 drawn out from the coil 11 are intertwined and both wires are soldered.
Next, as shown in c, the tip of the core wire 13b is folded into the lead wire folding recess 8, and the insulating cover 6 is fitted onto the terminal board 5 in the manner described above. In addition, coil 1 of outer bobbin 2
The lead line 2 is drawn out to the outside through a lead-out groove 51 formed at the lower part of the one side flange portion 3, as shown in FIG.

Note that the lead wire 13 may be connected as shown in FIG. 8. That is, the core wire 13b of the external lead wire 13 is inserted into the hole 19 of the lead wire winding part 9 from the right side, opposite to that in the first embodiment, and pulled upward, and then passed over the lead wire winding part 9. Fold it back to the right, pass it under the core wire 13b, and pull it upward. And the outer skin part 13a of the lead wire
into the holding part 7. Next, the lead wire 14 from the coil 11 is wrapped around the tip of the core wire 13b and soldered, and then the tip is passed over the lead wire winding part 9, folded back to the left, and folded into the lead wire folding recess 8 to be entwined. The fitting of the insulating cover 6 is the same as in the above case.

[Effect of idea]

According to the present invention, the insulating cover is fitted over the entire surface of the relay terminal board, and the relay terminal board and the insulating cover are provided with engaging portions that engage with each other when the relay terminal board and the insulation cover are fitted. The integrated insulating cover can reliably prevent the outer sheath of the lead wire from coming off, thereby reliably preventing the possibility that the sheath will separate from the relay terminal board. In particular, the lead wire holding portions of the relay terminal board are formed in an inverted L shape and have a lead wire insertion notch on the side surface, and the insulating cover is inserted between each of the lead wire holding portions, and the lead wire holding portions are inserted between the lead wire holding portions. Since a plurality of protrusions are provided to close the insertion notch, the lead wire outer sheath can be easily attached to the inside of the lead wire holder from the lead wire insertion notch, and the lead wire insertion notch can be closed by the protrusion. Since the entire periphery of the lead wire sheath is sealed, separation of the lead wire sheath can be reliably prevented. The insulating cover also provides a sleek appearance.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the transformer lead wire connection device of the present invention, Fig. 2 is a sectional view of its assembled state, Fig. 3 is an exploded perspective view of its main parts, and Fig. 4. 5 is a front view showing the engaged state of the terminal plate and the insulating cover, and FIG. 6 is a plan view showing the partially engaged state of the outer bobbin and the inner bobbin. , FIG. 7 is a sectional view showing the lead wire connection procedure, and FIG. 8 is a sectional view showing another example of the lead wire connection procedure. 2... Coil bobbin, 3, 4... Flange part,
5... Relay terminal board, 6... Insulating cover, 7... Lead wire holding part, 13... External lead wire, 13a...
...Outer skin part, 14...Leader wire, 17...Lead wire insertion notch, 23, 28...Engagement part, 26...Protrusion part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A relay terminal plate that connects the coil lead wire and the external lead wire is fitted across the flanges on both sides of the coil bobbin around which the coil is wound, and this relay terminal plate In a lead wire connection device for a transformer in which the outer skin of an external lead wire is held by a plurality of lead wire holding sections arranged in parallel on the top surface, an insulating cover is fitted over the entire surface of the relay terminal board, and the relay terminal The plate and the insulating cover are provided with engaging parts that engage with each other when the plate and the insulating cover are fitted, and the lead wire holding part of the relay terminal board is formed in an inverted L shape, and a lead wire insertion notch is provided on the side surface,
A lead wire connecting device for a transformer, wherein the insulating cover has a plurality of protruding portions inserted between the lead wire holding portions and closing the lead wire insertion notches. (2) The lead wire connection for a transformer as set forth in claim 1 of the utility model registration claim, wherein the relay terminal plate, when fitted to the flange portion of the coil bobbin, engages with the flange portion and becomes integral with the flange portion. Device.