JPH0582025U - Coil bobbin structure - Google Patents

Abstract

(57) [Abstract] [Purpose] Even in the case of a high-voltage coil, interference due to the voltage difference between the winding part and the terminal lead wire is eliminated to prevent fluctuations in the coil characteristics, and at the same time ensure high safety. To get it. A tubular bobbin main body 11, a flange portion 13 that divides the peripheral surface of the bobbin main body into a plurality of sections 12a to 12e, and a terminal lead wire connecting pin 14 of a winding wire 15 formed at one axial end of the bobbin main body 11. A winding wire 15 is wound around each section from one end of the bobbin main body 11 to the other end in succession over the flange portion 13 so that both ends thereof are connected to pins, and at least adjacent to the pins of the bobbin main body. In the section 12a, the peripheral surface of the bobbin main body 11 is formed to have a relatively small diameter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a coil bobbin for winding a coil for an inverter transformer, for example.

[0002]

[Prior Art]

 Conventionally, such a coil bobbin 1 is, for example, as shown in FIG. 3, a bobbin main body 2 around which a coil is wound, the bobbin main body 2 having a hollow cylindrical cross section and extending in the axial direction thereof, and the bobbin. A flange portion 3 is formed so as to divide the peripheral surface of the main body 2 into five sections in the axial direction, in the illustrated case, and a pin 4 formed near one end of the bobbin main body 2. is doing.

According to the coil bobbin 1 having such a configuration, first, the winding 5 is sequentially provided to each section from one end of the bobbin main body 2 to the other end of the bobbin main body 2 in the order above. Is wound, and both ends of the winding 5 are connected to the pins 4 respectively. That is, the winding start terminal lead wire 5a extending from one end of the bobbin main body 2 is connected to one pin 4, and the winding end terminal lead wire 5b extending from the other end of the bobbin main body 2 is crossed over each flange portion 3. By winding the bobbin body 2 to one end and connecting it to the other pin 4, the winding of the coil is completed.

[0004]

[Problems to be solved by the device]

 However, in the coil bobbin 1 configured as described above, the terminal lead wire 5b at the end of the winding 5 is laid around the winding of each section by a distance determined by the height of the flange portion 3. However, in the case of constructing a coil for high voltage, especially in the section near the pin 4 of the bobbin main body 2, the winding 5 of the section and the terminal lead wire 5b routed above the winding 5 are provided. Since the voltage difference between the two becomes large, not only the characteristics of the coil are affected, but there is a problem in terms of safety. In view of the above points, the present invention eliminates the interference due to the voltage difference between the winding part and the terminal lead wire even in the case of a high voltage coil, prevents the fluctuation of the coil characteristics, and improves the safety. The purpose is to provide a high coil bobbin.

[0005]

[Means for Solving the Problems]

 According to the present invention, there is provided a bobbin main body formed in a tubular shape, a flange portion formed to divide a peripheral surface of the bobbin main body into a plurality of sections in an axial direction, and the bobbin. A pin for connecting a terminal lead wire of a winding formed adjacent to one end of the main body in the axial direction, and sequentially crossing the flange portion from one end of the bobbin main body to the other end of the bobbin main body. A coil bobbin in which windings are wound around the respective sections, and both ends of the windings are connected to the pins, in at least a section adjacent to the pins among the sections of the bobbin main body, This is achieved by a coil bobbin structure characterized in that the peripheral surface of the bobbin body is formed to have a relatively small diameter.

[0006]

[Action]

 According to the above configuration, the circumference of the bobbin main body forming the section on the pin side of the bobbin main body having the largest voltage difference between the winding of each section and the terminal lead wire at the end of winding is larger than that of other sections. It has a small diameter. Therefore, the distance between the surface of the winding wound in this section and the end lead wire at the end of the winding, which is routed beyond the flanges on both sides of the section, is better than in other sections. Therefore, even when constructing a coil for high voltage, interference occurs between the winding of the section and the terminal lead wire routed above it, and the characteristics of the coil are adversely affected. There will be no impact and safety will be ensured.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of a coil bobbin according to the present invention. This coil bobbin 10 has, for example, a bobbin main body 11 having a hollow elliptical cross section and extending in the axial direction, around which a coil is wound, and a circumferential surface of the bobbin main body 11 in the axial direction. A plurality of, in the illustrated case, a flange portion 13 formed so as to be divided into five sections 12a, 12b, 12c, 12d and 12e, and a pin 14 formed near one end of the bobbin main body 11 are provided. There is.

The above-mentioned structure is similar to the conventional coil bobbin 1 shown in FIG. 3, but in the coil bobbin 10 according to the present invention, the pin 14 of the sections 12a, 12b, 12c, 12d, 12e is used. In the adjacent sections 12a, the peripheral surface of the bobbin main body 11 is formed to have a relatively small diameter.

The coil bobbin 10 according to the present invention is constructed as described above. First, from the one end of the bobbin main body 11 to the other end of the bobbin main body 11 sequentially beyond the flange portion 13, the sections 12a, 12b, A winding wire 15 is sequentially wound around 12c, 12d, and 12e, and terminal lead wires 15a and 15b at both ends of the winding wire 15 are connected to the pin 14, respectively. That is, the winding start terminal lead wire 15a extending from one end of the bobbin body 11 is connected to one pin 14, and the winding end terminal lead wire 15b extending from the other end of the bobbin body 11 is passed over each flange portion 13. By winding the bobbin main body 11 to one end and connecting it to the other pin 14, the winding of the coil is completed.

At this time, the terminal lead wire 15b at the end of the winding 15 is separated from the winding of each section 12a, 12b, 12c, 12d, 12e by a distance determined by the height of the flange portion 13. And the peripheral surface of the bobbin main body 11 constituting the section 12a having the largest voltage difference between the winding of the section and the end lead wire 15b at the end of the winding is connected to the other sections 12b, 12c, Since the diameter is smaller than the peripheral surface of the bobbin main body 11 in 12d and 12e, in the section 12a, the winding wire 15 of the section 12a and the terminal lead wire 15b that is routed above the winding wire 15 are provided. The distance between them is greater than in other sections. Therefore, even if the coil constituted by the winding 15 is for high voltage, the influence of the voltage difference can be reduced, the influence of the characteristic of the coil can be eliminated, and the safety can be secured. .

FIG. 2 shows another embodiment according to the present invention. In this case, the coil bobbin 20 has basically the same configuration as the embodiment of FIG. 1, and the diameter of the peripheral surface of the bobbin main body 11 is The sections 12a, 12b, 12c, 12d, 12e are formed so as to gradually increase in size. As a result, the distance between the winding 15 of each of the sections 12a, 12b, 12c, 12d and 12e and the terminal lead wire 15a at the end of the winding is increased corresponding to the voltage difference, so that the influence of the voltage difference is exerted. It can be further suppressed.

[0012]

[Effect of the device]

 As described above, according to the present invention, the peripheral surface of the bobbin main body constituting the pin side section of the bobbin main body where the voltage difference between the winding of each section and the terminal lead wire at the end of winding is the largest. , The diameter of the winding is smaller than in other sections, and the end of winding is wound beyond the surface of the winding wound in that section and the flanges on both sides of the section. The distance to the leads is greater than in other sections. Therefore, even when constructing a coil for high voltage, interference may occur between the winding of the section and the terminal lead wire routed above it, and the characteristics of the coil may be affected. In addition, safety can be ensured. Thus, according to the present invention, even in the case of a high voltage coil, the interference due to the voltage difference between the winding part and the terminal lead wire is eliminated to prevent the coil characteristic from fluctuating and the safety is high. An extremely superior coil bobbin will be provided.

[Brief description of drawings]

1 shows an embodiment of a coil bobbin according to the present invention, (A) is a plan view and (B) is a side view.

FIG. 2 shows another embodiment of the coil bobbin according to the present invention, (A) is a plan view and (B) is a side view.

FIG. 3 shows an example of a conventional coil bobbin,
(A) is a plan view and (B) is a side view.

[Explanation of symbols]

10 coil bobbin, 11 bobbin body, 12a-12e section, 13
Flange, 14 pin, 1
5 windings, 15a Terminal lead wire at the beginning of winding, 15b
Terminal lead wire at the end of winding.

Claims (1)

[Scope of utility model registration request] 1. A bobbin main body formed in a tubular shape, a flange portion formed so as to divide the peripheral surface of the bobbin main body into a plurality of sections in the axial direction, and one end in the axial direction of the bobbin main body. And a pin for connecting terminal lead wires of windings formed adjacent to each other, and winding the winding around each section from one end of the bobbin main body to the other end of the bobbin main body sequentially over the flange portion. In addition, in the coil bobbin in which both ends of the winding are connected to the pin, at least a section of each section of the bobbin main body adjacent to the pin has a peripheral surface of the bobbin main body having a relatively small diameter. A coil bobbin structure characterized by being formed.