JPH02886Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a plurality of rod-like bodies protruding from the periphery of an insulating substrate in which a coil wound around a magnetic core is placed at the center, and the coil is attached to the upper end of a pin terminal passed through the center. This is a molded coil that connects the lead wires and is entirely molded with resin, leaving the lower end of the pin terminal protruding from the bottom of the board.

As shown in Fig. 1, a conventional molded coil is made by placing a coil 1 having a magnetic core wound on a substrate 2 with a plurality of short pin terminals 3 penetrating the periphery, and connecting the lead wires of the windings of the coil 1. After each is connected to the upper end 31 of the pin terminal 3, the lower end 32 of the pin terminal 3 is exposed and molded with resin so as to cover the entire coil. In this molded coil assembly work, when connecting and soldering the lead wire of the coil 1 winding to the upper end 31 of the pin terminal 3, the work is difficult because the upper end 31 of the pin terminal is in a narrow area between the coil 1 and the board 2. There are difficult drawbacks.

In order to eliminate such drawbacks of the conventional method, the present invention
A mold in which a rod-shaped body with a metal pin terminal passing through the center and penetrating the bottom surface of the board is protruded from the periphery of the board, a coil is placed above the board, and the lead wire of the winding is connected to the top end of the pin terminal. with a coil,
Its purpose is to efficiently connect pin terminals and winding lead wires.

FIG. 2 shows an example of a coil holder according to the present invention, in which a shallow arc-shaped recess 4 whose side is the thickness of the coil 1 is formed in the center of a rectangular substrate 4 made of an insulating material.
1, and a rod-shaped body 4 standing upright near the four corners of the substrate 4.
2 are molded together. The height of the rod-shaped body 42 is made equal to or slightly higher than the height of the coil 1. Rod-shaped body 42
is provided with a through hole through which the pin terminal 5 can be easily inserted. The pin terminal 5 is inserted so that the upper end 51 and lower end 52 are exposed in the through hole of the rod-shaped body 42.
Pass through. As shown in FIG. 3, the coil 1 having a magnetic core wound with a wire is fitted into such a coil holder horizontally into the recess 41 of the substrate 4, and each of the lead wires of the winding is connected to each of the pin terminals 5. Wrap it around the upper end 51. The upper end of the rod-shaped body 42 is equal to or slightly higher than the height of the coil 1, so with the coil 1 attached to the board 4, turn it around and attach the upper end 5 of the pin terminal 5.
You can solder 4 terminals at once by dipping it in a solder bath with the terminal 1 facing down. As shown in Figure 3, by stretching the four lead wires and wrapping them around the pin terminal, coil 1 will not fall off even if the whole is reversed, so it can be easily immersed in the solder bath. may be adhered to the substrate 4. Furthermore, if a heat-resistant sheet made of mica or the like is applied to cover the bottom surface of the coil 1 when immersing it in a solder bath, damage to the windings of the coil 1 can be prevented.

When the connection soldering between the terminal and the lead wire is completed, a molded coil is obtained which is molded with resin and has a lower terminal 52 attached to a device or the like at the lower part of the substrate 4, as shown by the chain line in FIG.

As mentioned above, the difficulty of connecting and soldering the coil winding lead wires one by one in a narrow space to the conventional board with short terminals has been simplified by using the board of the present invention, and the efficiency has been improved. You can get molded coils well.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional molded coil, Figure 2 is a side view of a conventional molded coil.
3 is an assembled perspective view of the molded coil of the present invention, and FIG. 4 is a side sectional view of the molded coil of the present invention. In the figure, 1: coil, 2: board, 3: terminal, 4: board, 5: pin terminal, 42: rod-shaped body.

Claims (1)

[Scope of utility model registration request] A coil body wound around a magnetic core is placed on an insulating substrate, and a plurality of rod-shaped bodies protruding from the periphery of this substrate are not lower than the height of the coil body, and pins are inserted through the rod-shaped bodies in the axial direction. Insert a terminal, connect the lead wire of the winding to the upper end of this pin terminal,
A molded coil in which the lower ends of pin terminals are made to protrude from the bottom surface of the substrate, and the entire body is resin-molded, leaving this protrusion and the substrate.