JP2533664Y2 - Hoop terminal - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is used in an electronic device as a common choke coil and the like, and is used to constitute a one-turn current detecting transformer having a primary winding of one turn and a secondary winding of a plurality of turns. The present invention relates to a hoop terminal which is a part for assembling to a bobbin.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, for example, this type of hoop terminal is respectively integrated with a pair of hoop frames as components for assembling a bobbin for constituting a current detecting transformer. It is provided in a state.

That is, in one of the pair of hoop frames, a plurality of square-shaped pieces 13 are integrally provided at predetermined intervals on a hoop horizontal frame 12a as a substrate thereof. Thereafter, the middle part of the square-shaped piece 13 is bent at a right angle, so that the hoop terminal 11 embedded in the flange 14 on one side of the bobbin is moved from the hoop horizontal frame 12a to the root 18.
The structure is formed with the interposition.

In the other one of the pair of hoop frames, a plurality of comb-like pieces are integrally provided at predetermined intervals on a hoop horizontal frame 12b as a substrate thereof, and thereafter the comb-like pieces are provided. By bending the vicinity of the tip of the piece at a right angle, the hoop terminal 15 embedded in the flange 16 on the other side of the bobbin is formed from the hoop horizontal frame 12b with the root 18 interposed therebetween.

As described above, the hoop terminals 11 and 15 of the pair of hoop frames are usually extended from the hoop horizontal frames 12a and 12b at predetermined intervals from the insulating material using a plurality of dies. Are formed in a plurality of units so as to be buried with respect to.

Therefore, when a current detecting transformer is constructed, a pair of hoop horizontal frames 12a and 12b are first mounted on a bobbin in a state where they are opposed to each other in parallel with each other. And one turn of the primary side conductor is provided inside the flange 14 on one side of the bobbin to form a one-turn bobbin. In combination with the bobbin, the root portions 18 of the hoop terminals 11 and 15 are connected to the bobbin flange 14. , 16 are protruded from the overhang portion 19, the root portion 18 of the bobbin portion is cut, and a plurality of secondary-side windings are wound around the winding portion 20 of the bobbin. Finished.

[0007]

In the case of the hoop terminal in the hoop frame described above, the hoop terminal is integrated with the hoop horizontal frame, and there is a limit to increasing the thickness of the hoop terminal. The surface area (volume) of the primary-side conductor buried in the one-side flange of the first side is small, which restricts the current capacity when configuring the current detecting transformer. When used below, the primary-side conductor of one turn portion generates excessive heat. As a result, there is a problem that the conventional current detecting transformer using a bobbin including the hoop terminal structure of the hoop frame cannot be used when a large current capacity is required.

The present invention has been made to solve such a problem, and a technical problem of the present invention is to provide a hoop terminal as an assembling part for a bobbin capable of manufacturing a current detecting transformer requiring a large current capacity. Is to do.

[0009]

According to the present invention, flanges having overhangs are provided at both ends of an insulating tubular winding portion for winding a plurality of windings, and the magnetic core has a magnetic core. A pair of hoop frames, which are parts for assembling to a bobbin having a through hole for inserting a leg, are respectively provided, and a predetermined pair of hoop horizontal frames as substrates of the pair of hoop frames, respectively. In a plurality of hoop terminals provided integrally at a distance of from each other, the plurality of hoop terminals are opposed to each other when the bobbin is assembled after the pair of hoop horizontal frames are opposed to each other in parallel. Have a flat end for surface mounting that is located below the pair of hoop horizontal frames, and a plurality of hoop terminals on one side of the pair of hoop horizontal frames are ,Respectively A flange on one side of the bottle is formed integrally with the flange so as to surround the side surface of the through-hole and substantially circumnavigates around the flange with a connecting portion interposed therebetween, and is substantially thinner than the thickness of the flange. A hoop terminal having a box-like structure is obtained.

According to the present invention, in the above hoop terminal, a plurality of hoop terminals on the other side of the pair of hoop horizontal frames are each formed as a key-shaped piece including an end.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a state in which a pair of hoop frames (including hoop terminals) as parts for assembling a bobbin for forming a current detecting transformer according to an embodiment of the present invention are assembled to the bobbin. FIG. FIG.
FIG. 2 is a perspective view showing a pair of hoop frames shown in FIG. 1 with a bobbin removed. 3 is a side view showing the pair of hoop frames shown in FIG. 2, wherein FIG. 3 (a) relates to one side of the pair of hoop frames and FIG. 3 (b) shows the pair of hoop frames. It is about the other side.

Referring to FIG. 1, the hoop terminals 1 and 9 here are also provided on a pair of hoop frames, which are components for assembling the bobbin, respectively, and are used as substrates for the pair of hoop frames. The pair of hoop horizontal frames 6a and 6b are integrally provided at predetermined intervals. Incidentally, the bobbin to be used here is also provided with flanges 2 and 3 having overhang portions 5 at both ends of an insulating tubular winding portion 7 for winding a plurality of secondary-side windings, The structure has a through hole for inserting the magnetic leg of the magnetic core.

However, the hoop terminals 1 and 9 have a pair of hoop horizontal frames 6a and 6b which are in parallel with each other and face each other when the bobbin is assembled. 5, and has a flat end 4 for surface mounting which is located below the surface of the pair of hoop horizontal frames 6a and 6b.

More specifically, a pair of hoop horizontal frames 6a,
As shown in FIGS. 2 and 3 (a), the plurality of hoop terminals 9 in the hoop horizontal frame 6a, which is one side of the bobbin 6b, have through holes (the magnetic legs of the magnetic core have magnetic poles) in the flange 3 on one side of the bobbin. (Inserted), and is formed and buried integrally with the connecting portion 10 so as to surround the side surface of the flange 3 substantially one round, and has a substantially box-like structure slightly thinner than the thickness of the flange 3. In addition, an end 4 protruding from the overhang portion 5 and buried in the flange 3 on one side of the bobbin forms a flat angle for surface mounting and is located below the hoop horizontal frame 6a. That is,
Here, the hoop terminal 9 has a substantially box-shaped structure in order to increase the surface area (volume) of heat radiation of one turn when a one-turn primary conductor is provided inside the flange 3 on one side of the bobbin. Thus, even if heat is generated by using a large current capacity, the structure can sufficiently cope with heat dissipation.

Further, a plurality of hoop terminals 1 in a hoop horizontal frame 6b which is the other side of the pair of hoop horizontal frames 6a, 6b.
Is formed as a key-shaped piece 8 including the above-mentioned end portion 4 as shown in FIGS. 2 and 3 (b),
An end portion 4 protruding from the overhang portion 5 and buried in the flange 2 on the other side of the bobbin forms a flat angle for surface mounting and is located below the hoop horizontal frame 6b.

The hoop terminals 9 and 1 are also provided with a predetermined distance from the insulating material by using a plurality of dies, and the hoop horizontal frame 6 is also provided.
Each is formed in a plurality of units so as to extend from a and 6b and become a portion that can be embedded in the bobbin.

In order to construct a current detecting transformer, the hoop terminals 1 and 9 are first covered with a plurality of dies, and a pair of hoop horizontal frames 6a and 6b are opposed to each other in parallel as shown in FIG. Sealing is performed so that the hoop terminals 1 and 9 are embedded in the flanges 2 and 3 of the bobbin, respectively, and the magnetic legs of the magnetic core are inserted into the through holes of the bobbin, and the flange 3 on one side of the bobbin is formed. A bobbin part of a current detecting transformer having a structure in which a one-turn primary side conductor is provided inside to form a one-turn bobbin, and the end 4 of the hoop terminals 1 and 9 projects beyond the overhanging part 5 in combination with the bobbin. And then the end portions 4, 4 at the hoop terminals 1, 9 of the bobbin portion
The cutting portion A in the connecting portion 10 is cut and the hoop horizontal frame 6 is cut.
a and 6b, and then a secondary winding is wound around the winding part 7 of the bobbin to complete the transformer.

[0019]

As described above, according to the hoop terminal of the present invention, when forming a current detecting transformer as a component to be assembled to the bobbin, the primary of the one-turn portion buried in the flange on one side of the bobbin. It has a structure to increase the heat radiation surface area (volume) for the conductor on the side and to take sufficient measures against heat radiation at the time of heat generation, and it is an effective assembly part for the bobbin for manufacturing a current detection transformer requiring a large current capacity. Therefore, it is extremely useful industrially.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a pair of hoop frames (including hoop terminals) as parts for assembling to a bobbin for forming a current detecting transformer according to an embodiment of the present invention are assembled to the bobbin. It is.

FIG. 2 is a perspective view showing a pair of hoop frames shown in FIG. 1 with a bobbin removed.

3 is a side view showing a pair of hoop frames shown in FIG. 2, wherein (a) relates to one side of the pair of hoop frames, and (b) relates to the other side of the pair of hoop frames. It is.

FIG. 4 is a perspective view showing a state in which a pair of hoop frames (including hoop terminals) as components for assembling the bobbin to constitute a conventional current detection transformer are assembled to the bobbin.

[Explanation of symbols]

 1, 9, 11, 15 Hoop terminal 2, 3, 14, 16 Flange 4, 17 End 5, 19 Overhang 6a, 6b, 12a, 12b Hoop horizontal frame 7, 20 Winding 8 Key-shaped piece 10 Connection Part 13 Square-shaped piece 18 Root

Claims (2)

(57) [Scope of request for utility model registration] An insulative tubular winding for winding a plurality of windings is provided with flanges provided with overhangs at both ends, and has a through hole for inserting a magnetic leg of a magnetic core. A pair of hoop frames, which are parts for assembling to the bobbin, are respectively provided, and are integrally provided at predetermined intervals with a pair of hoop horizontal frames as substrates of the pair of hoop frames. In the plurality of hoop terminals, the plurality of hoop terminals are arranged such that the pair of hoop horizontal frames face each other in parallel with each other, and when the bobbin is assembled, the plurality of hoop terminals are opposite to each other. The pair of hoop terminals on one side of the pair of hoop horizontal frames has a flat rectangular end for surface mounting protruding below the pair of hoop horizontal frames. The flange on one side of the flange is formed integrally with the flange so as to surround the side surface of the through hole and substantially circumnavigates the flange, and is buried integrally with a connecting portion therebetween, and has a thickness slightly smaller than the thickness of the flange. A hoop terminal for a current detection transformer, which has a thin, substantially box-shaped structure. 2. The hoop terminal according to claim 1, wherein the plurality of hoop terminals on the other side of the pair of hoop horizontal frames are formed as key-shaped pieces each including the end. Hoop terminal.