JPH0343691Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is based on a method in which a core is inserted through a core cover so that an E-shape and an I-shape or a pair of E-shapes face each other to form a sun-shape. The present invention relates to a coil transformer attached to a coil bobbin having protruding pin terminals.

[Conventional technology]

A conventional coil transformer has a structure shown in FIGS. 4 and 5.

That is, A is a coil bobbin having a cylindrical winding core 1 made of an insulating material and flanges 2 and 3 formed at both ends of the cylindrical winding core 1. The flanges 2 and 3 of the coil bobbin A have protrusions 4 and 5 parallel to each other on their outer surfaces 2' and 3' with the opening of the cylindrical winding core 1 in between, and grooves 6 for engaging a core cover, which will be described later. 7 is formed. One of the protrusions 5 forms a standoff that forms a space between the coil transformer and the substrate and prevents the substrate from coming into contact with a core to be described later. Further, near the standoff 5, a plurality of pin terminals 9 protruding perpendicular to the outer surface 3' of the collar 3 are provided.

B is a pair of U-shaped core covers that engage the grooves 6 and 7 of the flanges 2 and 3 from both sides of the cylindrical winding core 1;
The cross-sectional shape is U-shaped.

A core (not shown) is fitted into the core cover B and extends along the outer periphery of the core cover B, and the cylindrical winding core 1
located in the internal hole of.

In the above structure, to assemble the coil unit, first, the lead wire 10, which is the winding start end or winding end of the coil wound around the cylindrical winding core 1, is tied around the pin terminal 9. Thereafter, the core cover B is engaged with the grooves 6 and 7, and finally the core is fitted into the core cover B to complete the coil transformer.

[Problem that the invention attempts to solve]

Therefore, in the conventional coil bobbin A, since the pin terminal 9 and the standoff 5 are close to each other,
When winding the lead wire 10 of the coil wound around the cylindrical winding core 1 around the pin terminal 9 using an automatic winding machine, the nozzle 11 of the automatic winding machine comes into contact with the standoff 5, and the pin It was not possible to wrap the lead wire 10 all the way to the base of the terminal 9.

As described above, the purpose of the present invention is to wrap the lead wire to the base of the pin terminal without colliding with the nozzle of the automatic winding machine and the standoff when winding the lead wire to the pin terminal using the automatic winding machine. The purpose of the present invention is to provide a coil transformer with a structure that can be tied together.

[Means for solving problems]

According to the present invention, the cylindrical winding core 1 has a hole through which the core is inserted and a coil is wound around the outer peripheral surface.
, first and second flanges 21 and 20 provided at the first and second ends of the cylindrical winding core 1, respectively, and outer surfaces 21' of the first and second flanges 21 and 20,
first and second grooves 23 parallel to each other, each provided so that the open end of the hole appears on the bottom surface;
and 22, and the outer surface 21' of the first collar 21.
, the outer surface 2 is placed in a portion other than the first groove 23.
a coil bobbin A' having a pin terminal 9 provided so as to protrude at right angles to the coil bobbin A'; a U-shaped second core cover B' having a second protruding end; third and fourth protrusions that engage with the other end of the first groove 23 and the other end of the second groove 22, respectively; a U-shaped first core cover B' having an end; a core C located on the outer periphery of the first and second core covers B' and within the hole of the cylindrical winding core 1; The first protruding end of the first core cover B' and the third protruding end of the second core cover B' are provided with the grooves along both side surfaces of the first groove 23, respectively. A standoff 24 extending outside the outer surface 21' of the first flange 21 and ensuring insulation between the core C and the board on which the coil is mounted.
A coil transformer is obtained, which is characterized in that a coil transformer is formed.

〔Example〕

Hereinafter, the present invention will be explained based on FIGS. 1 to 3 of the embodiment. A' is a coil bobbin, and the difference from the conventional one is that the flanges 20 and 21 do not have protrusions, that is, standoffs, and are simply made of a core cover, which will be described later. Grooves 22 and 23 are formed in which B' engages, and a pin terminal 9 is vertically protruded from the outer surface 21' of one of the collars 21.

B' is the core cover, and the grooves 22 and 2 are the same as before.
3, but the difference from the conventional one is that a board on which the core and the coil are mounted is placed on the outside in the extending direction of the cylindrical winding core 1 in the part that engages with the groove 23 of the collar 21 on which the pin terminal 9 is protruded. A standoff 24 is formed to ensure insulation.

In such a structure, the order of assembling the coil transformer is the same as the conventional one, but as shown in Figure 2, the lead wire 1 is connected to the pin terminal 9 without the standoff.
0, the core cover B' having the standoffs 24 and the core C are assembled, so that the tip of the nozzle 11 and the base of the pin terminal 9 can be sufficiently approached, and the lead wire 10 can be connected to the pin terminal. You can reliably tie it all the way to the base of 9.

[Effect of idea]

As described above, the present invention is a coil transformer in which the core cover is provided with standoffs to ensure insulation between the core and the board on which the coil is mounted, so that the winding of the lead wires to the pin terminals by an automatic winding machine is avoided. It has the advantage of being able to reliably reach the roots.

[Brief explanation of the drawing]

Figures 1 to 3 show embodiments of the present invention; Figure 1 is an exploded perspective view of the coil unit; Figure 2 is a state diagram when the lead wire is tied around the pin terminal; Figure 3 is a side view;
4 and 5 are conventional examples, FIG. 4 is an exploded perspective view corresponding to FIG. 1, and FIG. 5 is a view corresponding to FIG. 2. In the figure, A and A' are coil bobbins, B and B' are core covers, C is core, 1 is cylindrical winding core, 2, 3, 2
0, 21 are the tsuba, 2', 3', 21' are the outer surfaces, 6, 7,
22 and 23 are grooves, 5 and 24 are standoffs, 9 is a pin terminal, 10 is a lead wire, and 11 is a nozzle.

Claims (1)

[Claims for Utility Model Registration] A cylindrical winding core 1 having a hole into which the core is inserted and a coil wound around the outer peripheral surface, and first and second ends of the cylindrical winding core 1. The first and second flanges 21 and 20 respectively provided in the first and second flanges 2
First and second grooves 23 and 22 parallel to each other are provided on the outer surfaces 21' of the first collars 21 and 20, respectively, so that the open end of the hole appears on the bottom surface, and the outer surface of the first collar 21. 21', said first groove 2
a coil bobbin A' having a pin terminal 9 provided in a portion other than 3 so as to protrude perpendicularly to the outer surface 21'; one end of the first groove 23 and one end of the second groove 22; a U-shaped first core cover B' having first and second protruding ends that respectively engage with the other end of the first groove 23 and the other end of the second groove 22; a U-shaped second core cover B' having third and fourth protruding ends; located on the outer periphery of the first and second core covers B' and within the hole of the cylindrical winding core 1; a core C; and the first groove 23 is provided in the first protruding end of the first core cover B' and the third protruding end of the second core cover B', respectively. standoffs 24 extending outside the outer surface 21' of the first collar 21 along both sides of the core C and ensuring insulation between the core C and the substrate on which the coil is mounted;
A coil transformer characterized by being formed with.