JPS6220972Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a coil bobbin for an electromagnetic device.

First, a conventional example is shown in FIGS. 1 and 2.
1 is a winding part around which the coil 2 is wound, and this winding part 1
A flange 3 is integrally formed at both ends of the flange.
A square hole 5 for insertion into the iron core 4 is formed in the winding portion 1 and the flange 3. Furthermore, a terminal block 6 that expands outward is integrally formed on the flange 3. These terminal blocks 6 are formed with an insertion hole 8 into which an L-shaped pin terminal 7 is inserted and a lead wire extraction groove 10 through which the lead wire 9 from the coil 2 is drawn out and wound around the pin terminal 7. There is.
However, since the pin terminal 7 is not prevented from rotating, there is a risk that adjacent devices will come into contact with each other.
Since the pin terminal 7 approaches the iron core 4, insulation between the two is hindered. In order to improve the insulation performance, it is necessary to widen the gap between the two, but this increases the length of the flange 3, which increases the overall height of the coil bobbin, which is not preferable. Furthermore, when the pin terminal 7 is connected to the PC board 11, it moves upward due to resistance, and there is a risk that stress will be applied to the lead wire 9 and cause it to break.

Furthermore, as shown in FIGS. 3 and 4, it is possible to form a groove 12 on the top surface of the terminal block 6 to prevent the pin terminal 7 from rotating.
Regarding the insulation between the
Problems similar to those shown in Figures and Figures 2 remain.

This idea was developed in view of these points, and is an electromagnetic device that improves the insulation between the iron core and the pin terminal, prevents the pin terminal from rotating and coming off, and prevents the lead wire from breaking. The purpose is to make coil bobbins.

In this idea, a terminal block that expands outward is integrally formed on the winding part around which the coil is wound, and an L-shaped pin terminal is inserted into this terminal block. A retainer that is fitted into a groove formed on the terminal block to prevent the pin terminal from rotating, preventing accidental contact between adjacent pin terminals, and also holding the insulating plate on one side of the terminal block and the opposite side that approaches the iron core. forming a section;
This insulating plate prevents poor insulation even if the pin terminals and the iron core are close to each other, and also prevents the pin terminals from coming off, thereby preventing breakage of the lead wires.

An embodiment of this invention will be explained based on FIGS. 5 to 7. The same parts as those described in FIGS. 1 to 4 will be described using the same reference numerals. A flange 3 and a terminal block 6 are integrally formed at both ends of the winding part 1, and an insulating plate 13 is attached to these terminal blocks 6 so as to be slidable on the opposing surface approaching the iron core 4.
A groove 14 is formed as a holding portion for holding the holder. Further, the terminal block 6 is formed with an insertion hole 8 through which an L-shaped pin terminal 7 is inserted, and a groove 12 facing the insulating plate 13, which communicate with each other in an L-shape. Further, the terminal block 6 is formed with a lead wire extraction groove 10 from which the lead wire 9 of the coil 2 is drawn.

In such a configuration, the coil 2 is attached to the winding portion 1.
The lead wire 9 drawn out from the coil 2 through the lead wire pull-out groove 10 is wound around the pin terminal 7 inserted into the insertion hole 8, and the insulating plate 13 is inserted into the groove 14.

Therefore, when the square hole 5 is inserted into the center leg of the iron core 4, the insulating plate 13 is inserted between the pin terminal 7 and the iron core 4.
intervening, the insulation performance between the two is greatly improved.
Furthermore, since a portion of the pin terminal 7 fits into the groove 12, rotation is prevented, and adjacent pin terminals 7 are not short-circuited. In addition, the pin terminal 7 is inserted into the insertion hole 8.
Even if the lead wire 9 is simply inserted into the lead wire, it can be prevented from coming off by the insulating plate 13, and furthermore, since the lead wire 9 is prevented from rotating by the groove 12, stress is not applied to the lead wire 9 and the lead wire 9 is not broken. Furthermore, the interposition of the insulating plate 13 allows the iron core 4 and the pin terminal 7 to be brought closer together, making it possible to reduce the length of the flange 3 and downsizing the coil bobbin.

Since this device is configured in this way, even if the pin terminal inserted into the terminal block and the iron core come close to each other, there is an insulating plate between them, so the insulation performance can be improved. Even if the terminal is inserted into the insertion hole of the terminal block, the insulating plate can prevent it from coming off, and the groove can also prevent the pin terminal from rotating, which prevents the pin terminal from moving and causing the lead wire to break. This has the effect of not having to do anything.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing one conventional example, Fig. 2 is a front view thereof, Fig. 3 is a partially cutaway side view showing another conventional example, and Fig. 4 is its front view. 5 is a partially cutaway side view showing an embodiment of this invention, FIG. 6 is a front view thereof, and FIG. 7 is a perspective view thereof. 1... Winding part, 2... Coil, 4... Iron core, 6
...Terminal block, 7...Pin terminal, 8...Insertion hole, 1
2... Groove, 13... Insulating plate, 14... Groove (holding part).

Claims (1)

[Scope of utility model registration request] A terminal block that expands outward is integrally formed at the end of a cylindrical winding part around which a coil is wound and inserted into the iron core, and an L connected to the coil is formed on this terminal block. An insertion hole for inserting a shaped pin terminal and a groove for preventing rotation of the pin terminal facing one side of the iron core are formed in an L-shape so as to communicate with each other, and an insulating plate is placed on the terminal block so as to face the opposite side approaching the iron core. A coil bobbin for an electromagnetic device, characterized by forming a holding part that is held by a surface.