JPH09306759A - Coil bobbin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable ensuring an insulation distance between one of a primary winding and a secondary winding and a connection part of a lead-out wire led out from the other with a terminal, without affecting complexity, width, height and the like of coil bobbin structure. SOLUTION: A cylindrical winding part 10 on which primary and secondary windings are wound has a terminal board 20 on one end of the cylindrical winding part 10. On a surface of the terminal board 20 which is opposite to the side where the cylindrical winding part 10 is provided, a connection terminal 21 of the primary winding and a connection terminal 21 of the secondary winding are provided in a protruding manner. A guide protrusion 22 is provided on the lateral side of the terminal board 20, and a lead-out wire H lead out from at least one of the primary winding and the secondary winding passes on a lateral part 22a of the guide protrusion 22 or above the guide protrusion 22 so as to be curved or bend and connected with the terminal 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to one of a primary winding wire and a secondary winding wire, and a connecting portion of a terminal in a lead wire drawn from the other winding wire. The present invention relates to an improvement in a coil bobbin that can secure an insulation distance between the coil bobbin without affecting the complexity of the structure of the coil bobbin, the width, and the height.

[0002]

2. Description of the Related Art In various coils such as transformers, it is required to ensure electrical insulation between the winding on the primary side and the winding on the secondary side, which is suitable for the voltage used. It is required to have insulation performance and insulation distance. One of the things that this type of coil must have to ensure this electrical insulation is one of the primary side winding or the secondary side winding wound on the bobbin. , There is an insulation distance between the lead wire drawn from the other winding wire and the connection point of the terminal. That is, at the connecting point between the lead wire and the terminal, the coating of the lead wire is deteriorated by the heat of soldering for making this connection, so that either one of the primary side winding or the secondary side winding and the other side It is required that a required insulation distance corresponding to the voltage used is secured between the connection point of the lead wire drawn from the winding wire.

In recent years, one or both of the primary winding wire and the secondary winding wire is used as a three-layer covered insulated wire to make a coil of this type compact.
Even in such a three-layer covered insulated wire, a required insulation distance is secured between the connection point between the three-layer covered insulated wire and the terminal and the other winding wound around the bobbin. Is required.

As one of the methods for ensuring such an insulation distance, a terminal board provided on one end side of a coil bobbin forming this type of coil is made relatively thick so that it can be wound around the coil bobbin. Either one of the windings on the primary side or the winding on the secondary side,
The insulation distance corresponding to the thickness dimension of the terminal board is secured between the lead wire drawn from the other winding wire and the connection portion of the terminal.

However, in such a method, since the dimension of the coil bobbin in this type of coil in the axial direction is necessarily large, there is a disadvantage that it is difficult to make the coil compact.

For this reason, one flange of the coil bobbin having the flanges at both ends is used as an insulating plate, a lead wire guide groove is provided between the one flange and the terminal board, and a winding wire wound around the coil bobbin is provided. The transformer having a configuration in which the lead wire is wound about half a turn around the guide groove and connected to the terminal so that the lead wire is connected to the terminal of the terminal board on the side opposite to the lead side of the lead wire. Is proposed. (Actual Kaihei 7-42507)

[0007]

However, in such a transformer, the work of winding the lead wire around the guide groove for about half a turn is required for assembling the transformer, and the lead wire is pulled out relatively long from the winding wire. Therefore, the resistance value of the transformer is increased accordingly. Moreover, since a gap corresponding to the guide groove of the lead wire is inevitably formed between the collar of the coil bobbin and the magnetic core incorporated in the coil bobbin, the length of the transformer in the axial direction of the coil bobbin is equal to the gap. It was to increase the size. Further, in order to configure the transformer, the magnetic core is made longer by the amount of the gap, or the length dimension in the axial direction of the coil bobbin is made smaller,
It was necessary to reduce the size of the wound portion of the winding. Further, since the three-layer covered insulated wire is relatively expensive, it is required to make the dimension of the lead wire as short as possible while ensuring the insulation distance. It was difficult.

[0008] Therefore, the present invention is intended to eliminate the disadvantages of the prior art.

In addition, the insulation distance between either one of the primary winding wire or the secondary winding wire and the connection point of the terminal in the lead wire drawn from the other winding wire is The purpose is to ensure the coil bobbin without affecting the complexity, width, height, etc. of the structure of the coil bobbin.

[0010]

In order to achieve the above object, the present invention provides a cylindrical bobbin 10 around which a coil bobbin B is wound with primary and secondary windings M1 and M2.
Is provided with a terminal board 20 on one end side of the tubular winding portion 10, and the surface of the terminal board 20 on the side opposite to the side on which the tubular winding portion 10 is provided has a primary side. The connection terminal 21 of the winding M1 and the connection terminal 21 of the secondary winding M2 are provided in a projecting manner, and a guide projection 22 is provided on the side surface of the terminal board 20. The lead wire H drawn from at least one of the wire M1 and the secondary winding M2 is curved or bent through the side 22a of the guide projection 22 or on the guide projection 22 to bend or bend the terminal. 21
It is configured to be connected to.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, typical embodiments of the present invention will be described.

Coil bobbin B according to this embodiment
The tubular winding portion 10 around which the primary and secondary windings M1 and M2 are wound is provided with a terminal board 20 on one end side of the tubular winding portion 10. On the surface of the terminal board 20 on the side opposite to the side on which 10 is provided, the connection terminal 21 of the primary winding M1 and the connection terminal 21 of the secondary winding M2 are provided in a protruding manner. , This terminal board 20
Has a guide protrusion 22 on its side surface, and a lead wire H drawn from at least one of the primary winding M1 and the secondary winding M2 is a side portion 2 of the guide protrusion 22.
It is provided with a configuration in which it is connected to the terminal 21 after being curved or bent through the direction 2a or on the guide protrusion 22.

Therefore, according to the coil bobbin B of this embodiment, the lead wire H from the winding wire M wound around the tubular winding portion 10 of the coil bobbin B is attached to the side portion of the guide projection 22. The lead line H can be curved or bent only by connecting to the terminal 21 through the guide line 22a or the guide protrusion 22 upper 22b, and the lead line H increased by the bending or bend.
Of the primary winding M1 or the secondary winding M2, and the other winding M
Insulation distance between the lead wire H drawn from the terminal 21 and the connection point P1 of the terminal 21, that is, the vicinity of the connection point P1 of the lead wire H and the terminal 21 deteriorated by the heat of soldering, and the tubular winding portion. Lead-out position P2 of lead-out line H of said one winding M wound around 10
It is possible to easily and appropriately increase the length of the lead line H up to.

Further, the guide protrusions 22 are provided in the terminal board 2
Since it is provided on the side surface of No. 0, the guide projection 22 does not affect the axial length of the coil bobbin B, and the width of the terminal board 20 is not unnecessarily increased. . As a result, various coils such as the transformer T including the coil bobbin B can be made as compact as possible.

Further, the magnetic core J incorporated in the existing coil bobbin B having the same length in the axial direction can be incorporated and used as it is.

A more specific embodiment of the present invention shown in FIGS. 1 to 7 will be described below.

Here, in FIG. 1 and FIG. 6, in order to facilitate understanding of the configuration of the coil bobbin B according to this embodiment, a transformer T constructed by using the coil bobbin B is described.
2 is shown from the side, and FIG. 2 shows the transformer T from the side opposite to the side shown in FIG. 3 and 6 show the transformer T in a state of a vertical cross section, and FIG. 4 shows the coil bobbin B as seen from the left side in FIG. Further, FIG. 5 shows the coil bobbin B in a state of a cross section.

Coil bobbin B according to this embodiment
Is the terminal board 20 on one end side of the tubular winding portion 10 having a rectangular tubular shape.
Is provided with an outward facing flange 30 on the other end side.

The collar 30 is provided so as to go around one end edge of the cylindrical winding portion 10.

Further, in this embodiment, the terminal board 20 is configured such that the side surface 20b following the pair of side surfaces 20a, 20a is narrower than the pair of facing side surfaces 20a, 20a. I am doing it. In addition, a pair of side surfaces 20 on the narrow side is provided at a substantially central portion of the side surface 20b on the narrow side.
There is provided a split groove 20c extending over b and 20b and communicating with the inside of the cylindrical winding portion 10. The split terminal 20c allows the terminal board 20 to extend from one side face 20a on the length side to the other side face 20a. The structure is divided into the side surface 20a.

In the lower surface portion of the terminal board 20 facing the upper surface on which the cylindrical winding portion 10 is provided, five pieces are provided on both sides sandwiching the split groove 20c at substantially equal intervals. Terminals 21, 21 ... Are projected.

Further, at the edge portion of the terminal board 20 on which the one side surface 20a on the length side is in contact with the upper surface, a protrusion is formed along the edge portion and in a direction substantially orthogonal to the side surface 20a on the length side. A protruding plate 23 is provided. Further, at a position in the protruding plate 23 approximately in the middle of the length direction of the terminal board 20, from the protruding end edge of the protruding plate 23 to the peripheral surface of the cylindrical winding portion 10 provided on the upper surface. A notch 23a having a size is provided.

Further, below the protruding plate 23 on the one side surface 20a of the terminal board 20 on the length side,
A guide protrusion 22 is provided which is substantially parallel to the protrusion plate 23 and has a plate shape and is protruded from the side surface 20a by substantially the same size as the protrusion plate 23. In this embodiment, the guide protrusion 22 is formed by the cutout portion 2
3a, which is located directly below the both sides 22a, 22a
Is provided in a length to be positioned to the side of the cutout portion 23a.

Therefore, in this embodiment,
Either one of the lead lines H from the primary side or secondary side windings M1 and M2 wound around the tubular winding portion 10 constitutes one of the terminal rows sandwiching the split groove 20c. While being connectable to the terminal 21, the other of the leads H from the primary side or secondary side windings M1 and M2 is
Terminals 2 forming the other terminal row sandwiching the split groove 20c
1 can be connected. Also, one of the primary side or secondary side windings M1 and M2 that is drawn out from the one side surface 20a side where the guide protrusion 22 is provided and is connected to the terminal 21 on the one side surface 20a side. , Fig. 3
In FIG. 1, the lead wire H drawn from the primary winding M1 can be drawn downward from the cutout portion 23a by the cutout portion 23a, and the pullout line H drawn in this way is shown in FIG. As shown in particular, the guide protrusion 22 allows the guide protrusion 22 to be connected to the terminal 21 in a state of being curved or bent through the side portion 22 a of the guide protrusion 22.

That is, in this embodiment, the edge of the cutout portion 23a serving as the lead-out position P2 of the lead-out line H drawn out from the side surface 20a on which the guide protrusion 22 is provided, and the terminal. Since the guide protrusion 22 is provided so as to block the line segment connecting the bases of the terminals 21 forming the row, the lead wire H connected to the terminal 21 through the side 22a of the guide protrusion 22. Is always curved or bent, and the length dimension of the lead wire H between the connection point P1 of the lead wire H and the terminal 21 and the lead position P2 of the lead wire H is calculated as follows. It can be secured long without increasing the thickness dimension.

Further, as particularly shown in FIGS. 6 and 7, one of the primary side or secondary side windings M1 and M2 connected to the terminal 21 on the one side surface 20a side, as shown in FIG. In the upper part 22 of the guide projection 22, the lead wire H drawn from the winding M1 on the primary side downward by the notch 23a is pulled out from the notch 23a.
It can also be connected to the terminal 21 in a curved or bent state through b.

Even when the lead wire H is drawn out and connected to the terminal 21, the lead wire is drawn between the connection point P1 between the lead wire H and the terminal 21 and the lead position P2 of the lead wire H. The length dimension of the line H can be secured long without increasing the thickness dimension of the terminal board 20.

The guide protrusion 22 is not limited to the structure shown in this embodiment, but can be connected to the terminal 21 in a state where the lead wire H is curved or bent. However, when the guide protrusion 22 is formed in a plate shape, the protrusion position, the protrusion length, the protrusion size, etc. may be appropriately changed and configured as necessary. Further, an extension portion of an appropriate size is formed on the one side surface 20a so that the lead wire H passed through the upper portion 22b of the guide protrusion 22 is curved or bent and connected to the terminal 21. The guide protrusion 22 may be formed by a projecting portion.

Further, in this embodiment, a plurality of guide grooves 24, 24 ... Through which the lead wire H guided by the guide protrusion 22 is passed are provided below the guide protrusion 22. By the guide of the guide groove 24, the leading end of the lead wire H curved or bent by the guide protrusion 22 is easily directed to the base of the terminal 21 to which the lead wire H is connected.

The other side surface 20a on the length side of the terminal board 20 opposite to the side on which the guide protrusion 22 is provided extends from the upper surface of the terminal board 20 toward the lower surface thereof. A plurality of guide grooves 25, 25 ... Are provided, and either one of the primary side or secondary side windings M1 and M2 drawn from the other side surface 20a side, the secondary side winding in FIGS. 2 and 7. The lead wire H of M2 is guided in the guide groove 25 so that the leading end side of the lead wire H is on the other side surface 20a side and constitutes the terminal row 21.
It is oriented toward the base and can be connected to the terminal 21.

In this embodiment, the drawer 21 is connected to the terminal 21 on the side where the guide protrusion 22 is provided in the curved or bent state as described above. The wire H and the winding wire M from which the lead wire H is drawn are defined as a three-layer covered insulated wire M ′. In addition, reference numeral J in the drawing denotes a magnetic core formed by assembling a pair of E-shaped cores from the upper side of the coil bobbin B so as to insert the middle leg into the cylindrical winding portion 10. , T is an insulating tape interposed between the winding M on the primary side and the winding M.

[0032]

In the coil bobbin B according to the present invention, the cylindrical winding portion 10 around which the primary and secondary windings M1 and M2 are wound is provided with a terminal board 20 on one end side of the cylindrical winding portion 10. And the connection terminal 21 of the primary winding M1 and the secondary winding M2 are provided on the surface of the terminal board 20 on the side opposite to the side where the cylindrical winding portion 10 is provided. A connection terminal 21 is provided in a protruding manner, and a guide protrusion 22 is provided on a side surface of the terminal board 20, and the primary side winding M is provided.
The lead wire H drawn from at least one of the primary winding M2 and the secondary winding M2 is a side portion 22a of the guide protrusion 22.
On the other hand, since it has a configuration in which it is bent or bent through the guide protrusion 22 and is connected to the terminal 21, the winding wound around the tubular winding portion 10 of the coil bobbin B concerned. The lead line H of the line M is connected to the guide protrusion 2
The lead wire H can be curved or bent only by connecting to the terminal 21 through the side portion 22a of the second side or on the guide protrusion 22, and the lead wire H increased by the bending or bending. Depending on the size, the winding M of either one of the primary winding M1 or the secondary winding M2 and the connection point P1 of the terminal 21 in the lead H drawn from the other winding M Insulation distance between,
That is, the lead-out position of the lead-out wire H from the one winding M wound around the connecting portion P1 between the lead-out wire H and the terminal 21, which is deteriorated by the heat of soldering, and the tubular winding portion 10. The length of the lead line H up to P2 can be easily and appropriately increased.

Further, the guide projection 22 is formed by the terminal board 2
Since it is provided on the side surface of No. 0, the guide projection 22 does not affect the axial length of the coil bobbin B, and the width of the terminal board 20 is not unnecessarily increased. . As a result, various coils such as the transformer T including the coil bobbin B can be made as compact as possible.

Further, the magnetic core J incorporated in the existing coil bobbin B having the same length in the axial direction can be incorporated and used as it is.

[Brief description of drawings]

FIG. 1 is a side view of a transformer T using a coil bobbin B.

FIG. 2 is a side view of a transformer T using a coil bobbin B.

FIG. 3 is a sectional view taken along line XX in FIG. 1;

FIG. 4 is a side view of a coil bobbin B.

5 is a sectional view taken along line YY in FIG.

FIG. 6 is a side view of a transformer T using a coil bobbin B.

7 is a sectional view taken along line ZZ in FIG.

[Explanation of symbols]

 B coil bobbin M1 primary side winding M2 secondary side winding H lead wire 10 tubular winding part 20 terminal board 21 connection terminal 22 guide protrusion 22a side part

Claims (1)

[Claims] 1. A tubular winding portion around which primary and secondary windings are wound is provided with a terminal board on one end side of the tubular winding portion, and the tubular winding portion is provided. On the surface of the terminal board on the side opposite to the side where the connection is made, the connection terminals of the primary winding and the connection terminals of the secondary winding are provided in a protruding manner, and on the side surface of this terminal board, A guide protrusion is provided, and a lead wire drawn from at least one of the primary winding or the secondary winding is a side portion of the guide protrusion,
Alternatively, the coil bobbin is curved or bent through the guide protrusion and is connected to the terminal.