JP2001297925A - Coil bobbin, and choke coil and transformer using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil bobbin which has improved insulation between a lead wire and a core and high reliability, and a transformer and a cholk coil using the same. SOLUTION: A terminal block 7 is provided with a plurality of pins 1 and 2 erected in the planary and vertical directions of the terminal block 7. When the plane direction of the terminal block 7 is defined as an XY plane direction, arrangement direction of the pins as a Y direction, and the lengthwise direction of the pins as a Z direction, respectively, a first groove 5 with a U-shaped cross section penetrating in the Z direction is provided within a space between the sealed parts of two pins on the terminal block 7, and a first step 3 wherein a space open part is formed in the Z direction and the XY plane forms a bottom surface is provided adjacent to the groove 5, and then a second groove 6 with a U-shaped cross section penetrating in the Y direction is provided over the step 3 adjacent to the sealed part of the pin 2 near the first step 3. Furthermore, a second step 4 is provided adjacent to the sealed part of the pin 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer, a choke coil, and a structure of a lead drawing groove of a coil bobbin made of an insulating material.

[0002]

2. Description of the Related Art FIG. 5 is an enlarged perspective view of an example of a conventional coil bobbin. In the coil bobbin made of an insulating material, terminal blocks 14 and 15 in which pins 1 and 2 are planted are provided on a coil winding core portion 16, and a groove 51 is provided between the pin terminal blocks or between the pins. The lead wire wound around the bobbin is wound on the pin 1 via the groove 51.

FIG. 6 shows a conventional coil bobbin of FIG.
FIG. 6 is a diagram showing a case where a terminal of a lead wire 17 is wound around an outer pin 1. As shown in FIG. 6, when the lead wire 17 is wound around the outer pin 1 in the conventional coil bobbin of FIG.
Since I ₄ creepage distance between the lead wire 17 and the core 12 can not be taken, the case can not be met the specifications of the insulation performance between the lead wire and the core being requested as the performance of the coil is disadvantageously generated .

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a highly reliable coil bobbin having improved insulation characteristics between a lead wire and a core, and a transformer and a choke coil using the same. .

[0005]

SUMMARY OF THE INVENTION A coil bobbin according to the present invention has a pin terminal in which a pin terminal is implanted in order to secure a creepage distance between a lead wire and a core and to meet a standard of insulation performance between the lead wire and the coil. Provide steps and grooves on the table in multiple directions,
In addition to the grooves between the pin terminal blocks in which the pin terminals are planted, grooves are also provided in the pin terminal blocks in which the pin terminals are planted.

As a result, the creepage distance between the lead wire and the core is ensured, and the required standard of insulation performance between the lead wire and the coil is satisfied.

That is, the present invention provides a tubular coil core,
In a coil bobbin composed of a plurality of terminal blocks disposed on the outer surface of the core and a plurality of pins planted on the terminal block, at least one of the terminal blocks has two or more protrusions. The coil bobbin is formed and has a plurality of steps and a plurality of grooves formed by the two or more protrusions and the terminal block adjacent to the terminal block.

Further, the present invention comprises the coil bobbin, a magnetic core, and a winding, and an end of the winding passes through at least two of the plurality of grooves and the plurality of steps. And a choke coil wound around the pin.

Further, the present invention comprises the coil bobbin, a magnetic core, and a winding, and an end of the winding passes through at least two of the plurality of grooves and the plurality of steps. And a transformer wound around the pin.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A coil bobbin according to an embodiment of the present invention and a transformer and a choke coil using the same will be described below.

(First Embodiment) FIG. 1 is a perspective view of a coil bobbin according to a first embodiment of the present invention. Terminal block 7 in FIG.
Shows one of a plurality of terminal blocks, and the terminal block 7 has at least four projections. 4 above
A plurality of steps and a plurality of grooves are formed by the distance between the individual protrusions and the other terminal blocks. Here, in the coil bobbin of FIG. 1, a first step 3, a second step 4,
A first groove 5 and a second groove 6 are formed. here,
When the lead wire 9a is wrapped around the pin 1, as shown in FIG. 1, the lead wire 9a is passed through the second groove 6 from the second step 4, then passes through the third step 3, and And then pin 1 Thus, treatment of lead wire 9a, the core 12 and good reproducibility creepage distance l ₁ between the lead wires 9a, it is possible to secure a predetermined distance, it is possible to obtain a higher conventional insulation performance.

Embodiment 2 FIG. 2 is a perspective view of a coil bobbin according to Embodiment 2 of the present invention. The coil bobbin of the present invention is different from the coil bobbin of the first embodiment in that
A third groove 8 is provided in a direction parallel to the direction. When the lead wire 9b is tied to the pin 1 and the lead wire 10 is tied to the pin 2, the lead wire 9b passes through the third groove 8, passes through the second groove 6, further passes through the first groove 5, Attach to pin 1. On the other hand, the lead wire 10 passes through the groove 11 between the terminal blocks, passes under the terminal block, and is directly wound on the pin 2. In this way, even when different lead wires 9b and 10 are tangled to adjacent pins 1 and 2, they can be prevented from passing through the same groove, so that the creepage distance between core 12 and lead wire 9b can be prevented. l ₂ and the creeping distance l ₃ between the lead wires 9b and 10 can be secured at the same time, and higher insulation performance can be obtained.

(Embodiment 3) FIG. 3 is a top view of a transformer incorporating a coil bobbin according to Embodiment 1 or 2, and FIG. 4 is a front view of FIG. By using the coil bobbin according to the present invention, the creepage distance between the core and the lead wire can be secured. This allows the coil
It is now possible to meet the standards for insulation performance between lead wires. Further, by changing the winding state of the lead wire, for example, if only one winding is used, a choke coil having the same structure can be obtained.

As described above, even when different lead wires are tied to adjacent pins, a creepage distance between the lead wires can be secured by combining the step and the groove, and the insulation performance between the lead wires can be secured. The standard can now be met.

[0015]

As described above, according to the present invention, it is possible to provide a highly reliable coil bobbin with improved insulation characteristics between a lead wire and a core, and a transformer and a choke coil using the same.

[Brief description of the drawings]

FIG. 1 is a perspective view of a coil bobbin according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a coil bobbin according to a second embodiment of the present invention.

FIG. 3 is a top view of a transformer incorporating the coil bobbin of the present invention.

FIG. 4 is a front view of a transformer incorporating the coil bobbin of the present invention.

FIG. 5 is a perspective view of a conventional coil bobbin.

FIG. 6 is a perspective view of the conventional coil bobbin of FIG. 5 in which a lead wire has been wrapped around an outer pin.

[Explanation of symbols]

1, 2 pin 3 first step 4 second step 5 first groove 51 groove 6 second groove 7 terminal block 8 third groove 9a, 9b, 10, 17 lead wire 11 groove between terminal blocks 12 Core 13 Winding coil 14, 15 Terminal block 16 Coil winding core l _{1 to} l ₄ Distance between lead wire and terminal block

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01F 37/00 H01F 31/00 E

Claims (3)

[Claims] 1. A coil bobbin comprising a cylindrical coil core, a plurality of terminal blocks provided on an outer surface of the core, and a plurality of pins implanted on the terminal block. At least one of the pedestals has two or more projections formed thereon, and the two or more projections and a terminal block adjacent to the terminal block have formed a plurality of steps and a plurality of grooves, respectively. A coil bobbin characterized by the above-mentioned. 2. The coil bobbin, a magnetic core, and a winding, wherein an end of the winding passes through at least two of the plurality of grooves and a plurality of steps, and A choke coil characterized by being wound around a pin. 3. A coil bobbin according to claim 1, a magnetic core, and a winding, wherein an end of the winding passes at least two or more of the plurality of grooves and the plurality of steps. And a transformer wound around the pin.