JPS62154709A - Leakage transformer - Google Patents

Abstract

PURPOSE:To prevent the duplicate use of an insulating material as well as to reduce the quantity of the insulating material and a tape used by a method wherein, using the insulating material, consisting of a cylindrical part and an almost L-shaped part, and annular insulating plate, the part housed in the space located between iron cores and a E-shaped iron core and the housed parts are electrically insulated. CONSTITUTION:After a secondary coil 13, an insulating plate 17, a filament coil 14 and an insulating plate 18 have been fitted to the cylindrical part 23 of an insulating material 22 successively, a pair of leakage pass cores 16 are superposed on the insulating plate 18, they are housed between the cylindrical part 23 and an almost L-shaped part 24, and an assembled body which was built-up in advance is prepared. Then, the cylindrical part 23 of said assembled body is inserted into the center leg 11a of an E-shaped core 11. Subsequently, a primary coil 15 is fitted to the center leg 11a, superposed on the leakage bus core 16, and lastly, an I-type core 12 is attached and coupled to the E-type core 11. Through these procedures, the insulation required for all the parts housed in the space located between cores can be accomplished using the above- mentioned annular insulating plates 17 and 18 and the insulating material 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a leaky transformer used, for example, to drive a magnetron in a microwave oven.

[Conventional technology]

7 to 9 show conventional leaky transformers for microwave ovens. In the figure, 1 is an E-type core, 2 is an I-type core, and 3 is an I-type core.
A primary coil is formed by wrapping an insulating paper 3b around a cable coil 3a and fixing it with a plurality of tapes 3C.A terminal plate 4 having a terminal fitting 4a attached thereto is fixed to this coil 3 by winding a tape 5. Further, 6 is a secondary coil formed by wrapping an insulating paper 6b around an elementary coil 6a and fastening it with a plurality of tapes 6c, and 7 is a leakage path core in which an insulating paper 7a is wound and fastened with a tape 7b. moreover,
8 is a filament coil formed by wrapping insulating paper 8b around a filament element coil 8a and securing it with a plurality of tapes 8C, and 9 is a binding member that bundles the lead terminal 8d side of this coil 8. In addition, 6d in FIG. 7 is a terminal fitting 6e.
6f is a tape on which the terminal plate 6d is attached to the secondary coil 6.

Of the parts that have been individually insulated as described above, the secondary coil 3, the secondary coil 6, and the filament coil 8 are arranged as shown in FIGS. 7 and 8, respectively. The inner core 1 is fitted into the center leg 1a of the E-shaped core 1.
．． It is stored in the iron core volume space between the two. Further, the leakage path core 7 is sandwiched between the secondary coil 3 and the filament coil 8 and housed in the core amount space.

[Problem that the invention seeks to solve]

However, as described above, each part such as each coil 3.6 and leakage path core 8 is individually insulated, so a large number of insulating papers are used, and each part is individually insulated. When the parts are assembled as shown in Figures 7 and 8, the insulating paper of adjacent parts overlaps each other and provides double insulation, so the amount of insulating material used can be reduced. many. Furthermore, in order to hold the insulating paper to each component, a large number of tapes 6cs7bs8c, etc. are required, and this naturally requires a large number of man-hours. Moreover, in the past, each part was individually housed in the above-mentioned core volume space and assembled, so even when automating the assembly that is currently done manually, the number of automatic assemblies is the same as the current number of man-hours. and equipment are required. Therefore, it is thought that the automatic assembly line becomes long and requires a large amount of equipment cost, and therefore the conventional structure of the leaky transformer is unsuitable for automatic assembly.

[Means for solving problems]

The present invention is implemented in a leakage transformer in which at least a primary coil, a secondary coil, and a leakage path core are housed in a core space between an E-shaped core and a worked-shaped core; A cylindrical portion to be fitted, and an abbreviation-like shape on the inner surface of the core portion that is continuously provided from both sides of one end of the cylindrical portion, overlaps the inner surface of the side leg of the E-shaped core, and extends between the center leg and the side leg. an insulator made of an electrically insulating material consisting of an insulator, and at least one of the two coils is fitted and stored in the cylindrical portion between the cylindrical portion and the oval-shaped portion of the insulator, and The leakage path core is housed between the cylindrical part and the oval-shaped part of the insulator, and an annular insulating plate interposed between the stored coils and the cage bus core is placed in the cylindrical part. The above-mentioned conventional problems are solved by fitting and storing the insulator between the cylindrical part and the oval-shaped part.

[Effect]

In the leakage transformer equipped with the above solution, electrical insulation between the coil housed in the core mass space, the leakage path core, and the center leg of the E-type core is provided by the cylindrical portion of the insulator. Electrical insulation is provided between the coil stored in the core volume space and the core portion extending from the center leg to the side legs of the E-type core, and between the coil stored in the core mass space, the leakage path core, and the E-type core. Electrical insulation between the two is provided by an abbreviated portion of the insulator. Furthermore, electrical insulation between the coil housed in the core volume space and the leakage path core is achieved by an annular insulating plate interposed between them and fitted and housed in the central leg.

Therefore, by using the insulator and the annular insulating plate, the necessary insulation can be ensured for all the parts housed in the core volume space, and there is no need to individually insulate each of the housed parts. As described above, with the parts that can be electrically isolated from the E-type core by the insulator attached to the insulator, these parts can be fitted to the E-type core at the same time for assembly. Suitable for automating.

〔Example〕

11 in FIGS. 1 to 3 showing one embodiment of the present invention is E.
The shaped core 12 is a shaped core, which is constructed by laminating a large number of core plates. These inner cores 11 and 12 are joined to each other to form a magnetic circuit, and the E-shaped core 11 and
Iron core space (not shown) located on both sides of the central leg 11a is formed respectively.

In the core amount space, a secondary coil 13, a filament coil 14, and a secondary coil 15 are housed in the stated order, fitting into the central leg 11a, and a filament coil 14 and a portion of the coil 15 are also housed. A pair of glued cage bus cores 16 are sandwiched between the two. Furthermore, an insulating plate 17 sandwiched between the secondary coil 13 and the filament coil 14 is housed in the core amount space, and a leakage path core 16 and a portion of the coil 1
An insulating plate 18 to be sandwiched between the two is also housed between the two.

The secondary coil 13 is formed by wrapping a tape 13b around a part of the cable coil 13a to maintain its wound shape, and when it is alone, most of the cable coil 13a is exposed as shown in FIG. However, no insulation measures were taken.

The filament coil 14 is provided with a binding member 14a to maintain its wound shape, and when it is alone, most of it is exposed as shown in FIG. 1, and no insulation measures are taken. do not have. The leakage path core 16 is made by laminating a large number of core plates, and welding 16a is applied to the sides to maintain this laminated state, and when it is alone, no insulation measures are taken and all surfaces are exposed. in a state. Note that the -order coil 15 has an insulating paper 1 on the cable coil 15a.
5b is wound around the coil 15 and fixed with a plurality of tapes 15c, and a terminal plate 20 to which a terminal fitting 19 is attached is fixed to the coil 15 by winding a tape 21. The insulating paper 15b of this secondary coil 15 is
a is the center leg 11a of the E-shaped core 11 and the left and right side legs 11.
b, and ■-shaped core 12 and leakage path core 1
6 for electrical insulation.

Further, the insulating plates 17 and 18 each have a substantially rectangular ring shape, and are made of an insulating material such as synthetic resin or insulating paper.

An insulator 22 that electrically insulates the secondary coil 13, filament coil 14, and leakage path core 16 from the E-shaped core 11 is housed in the core volume space. This insulator 22 is integrally molded from an electrically insulating material such as synthetic resin, and as shown in FIG.
A cylindrical portion 23 that fits into the central leg 11a of the E-shaped core 11 and through which the central leg 11a passes, for example, and a side leg 11 of the E-shaped core 11 that is continuously provided from both sides of one end of the cylindrical portion 23.
b Overlapping the inner surface, the central leg 11a and the side legs 11
It is formed from an abbreviation-shaped portion 24 overlapping the inner surface of the core portion 11C extending over the iron core portion 11C. The insulator 22 itself has enough strength to maintain the shape shown in FIG. Insulating plates 17 and 18 are provided between the cylindrical portion 23 and the abbreviated portion 24 of the insulator 22, together with the secondary coil 13 and the filament coil 14, so as to fit into the cylindrical portion 23, respectively. At the same time, a leakage path core 16 is housed.

To assemble a leaky transformer consisting of the above parts, first,
A secondary coil 13 and an insulating plate 17 are attached to the cylindrical portion 23 of the insulator 22.
, the filament coil 14, and the insulating plate 18 are fitted in this order and attached to the insulator 22, and then the pair of leakage path cores 16 are stacked on the insulating plate 18 to form the tube tJ23 and the abbreviated part. 24 to prepare a pre-assembled assembly. Note that a tape may be wrapped around this assembly, if necessary, to prevent the cage bus core 16 and the like from coming off. Then, the cylindrical portion 23 of this assembly is fitted into the center leg 11a of the E-shaped core 11,
The above assembly is housed between the central leg 11a and the side legs 11b of the E-shaped core 11, which form a core volume space. Next, the secondary coil 15 is fitted to the central leg 11a, and the E-shaped iron core 11 is
It is stored between the central leg 11a and the side leg 11b of the leakage path core 16. Finally, the ■-shaped iron core 12 is joined and attached to the E-shaped iron core 11. The above work procedure completes the assembly of the leaky transformer.

The above assembly may be performed manually, but may also be performed mechanically using automatic assembly equipment.

As mentioned above, the number of man-hours required for fitting the E-shaped core 11 into the center leg 11a is the same as that of the insulator 22 and the annular insulating plate 17.
18 is adopted, since it is a two-step process, it is only necessary to carry out automatic assembly using two automatic assembly devices, and the number of devices required for automatic assembly is small, and the assembly line can be shortened.

The leakage transformer assembled as described above is shown in FIGS. 2 and 3, and shows the inner circumferences of the secondary coil 13 and the filament coil 14 housed in the core volume space, and the leakage path core 16. Electrical insulation between the side surface on the center leg 11a side and the center leg 11a of the E-shaped core 11 is provided by the cylindrical portion 23 of the insulator 22 interposed therebetween. And the secondary coil 1 housed in the iron core volume space.
Electrical insulation between the core portion 11c extending between the legs 11a and llb of the E-shaped core 11 is provided by the bottom portion of the abbreviated portion 24 of the insulator 22 interposed therebetween. Furthermore, electrical insulation is provided between the outer peripheries of the secondary coil 13 and filament coil 14 housed in the core volume space and the side surface of the leakage path core 16 on the side leg 11b side. This is done by a portion of the abbreviated portion 24 of the insulator 22 that is parallel to the cylindrical portion 23 . Moreover, electrical insulation between the secondary coil 13 and the filament coil 14 is achieved by an annular insulating plate 17 interposed between them, and between the filament coil 14 and the LeeK's Zipass iron core 16. The insulation of these.

This is achieved by an annular insulation/edge plate 18 interposed therebetween.

That is, the annular insulating plate 17, 18 and the insulator 22
By using this, it is possible to provide the necessary insulation to all of the components stored in the core space, so there is no need to individually insulate these stored components. This prevents the heavy use of insulating materials and significantly reduces the amount of insulating materials and tape used, as well as the number of man-hours required for insulation. can.

In addition, 25 in FIG. 2 is a terminal fitting attached to the abbreviated portion 24 of the insulator 22, and the terminal of the secondary coil 13 and the external lead wire are connected to this. , the abbreviated portion 24 can also serve as a terminal block, and the number of parts can be further reduced.

Although the above-mentioned embodiment is constructed as described above, in the present invention, in place of the synthetic resin insulator 22 of the above-mentioned embodiment, an insulator formed of insulating paper assembled as shown in FIG. 4 is used. Body 22 may also be used. This insulator 22 made of insulating paper is made by taking a developed insulating paper having folds 26 to 28 and a cut 29 as shown in FIG. Prepare a pair of parts bent around 28, and place them facing each other to form the cylindrical part 23a.
It is obtained by connecting two pieces together using an adhesive or the like.

Further, in the insulator 22 of the above embodiment, the cylindrical portion 23 and the oval-shaped portion 24 are made equal in length, but only the wall portion of the cylindrical portion 23 facing the oval-shaped portion 24 is omitted. 24, and its long tip is formed into an abbreviated part 2.
It is formed so that it can be bent on the 4 side, and this tip side portion is later bent to the abbreviated portion 24 side for attaching the secondary coil 13, etc.
For example, it may be implemented overlapping the leakage path core 16.

Similarly, the abbreviated portion 24 is formed to be longer than the cylindrical portion 23, and its long tip portion is bent toward the cylindrical portion 23 side, and this tip portion is connected to the secondary coil 13. The attachment may be carried out by bending it to the cylindrical portion 23 side later, for example, by overlapping it on the leakage path core 16.

Alternatively, a bent flange may be integrally provided on the periphery of the annular insulating plate 17, 18 to ensure a larger creepage insulation distance.

Furthermore, in implementing the present invention, a part of the coil 15 may be housed in the insulator 22, and the filament coil 14 and the insulating plate 18 are unique to leaky transformers for microwave ovens, and these is omitted when used for other purposes.

In carrying out the present invention, unless it is contrary to the gist of the invention, E-type cores, ■-type cores, negative coils, secondary coils, leakage path cores, cylindrical portions of insulators, and abbreviations for insulators will be used. It goes without saying that the specific structures, shapes, positions, materials, etc. of the shaped parts, insulating plates, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

[Effects of the Invention] According to the present invention, the gist of which is the configuration described in the above claims, the core is housed in the core volume space using an insulator consisting of a cylindrical portion and an abbreviated portion, and an annular insulating plate. By electrically insulating between the parts and the E-shaped core as well as between these stored parts, it is possible to prevent redundant use of insulating material and reduce the amount of insulating material and tape used. The number of work steps can be reduced, the number of assembly steps for the E-type core after insulation can be reduced, and assembly can be easily performed, and a leakage transformer suitable for automatic assembly can be provided.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a perspective view of an exploded state, FIG. 2 is a perspective view of an assembled state, and FIG. 3 is a perspective view of an assembled state.
The figure is a longitudinal front view. Figures 4 to 6 show other embodiments of the insulator, Figure 4 is a perspective view, Figure 5 is a developed view of the insulating paper, and Figure 6 shows the insulating paper shown in Figure 5 assembled. It is a perspective view of a state. 7 to 9 show a conventional example, with FIG. 7 being a perspective view, FIG. 8 being a longitudinal sectional front view, and FIG. 9 being an exploded perspective view. 11...E-shaped core, lla...center leg, 11b...
・Side leg, llc...iron core part, 12...■-shaped iron core,
13...Secondary coil, 15...-secondary coil, 16.
...Leakage path core, 17...Insulation plate, 22...
- Insulator, 23... cylinder part, 24... abbreviated part. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In a leakage transformer in which at least a primary coil, a secondary coil, and a leakage path core are housed in a core space between an E-type core and an I-type core, a cylindrical portion fitted into the center leg of the E-type core. and an approximately L length that is continuously provided from both sides of one end of the cylindrical portion and overlaps the inner surface of the side leg of the E-shaped core, and also overlaps the inner surface of the core portion extending between the central leg and the side leg.
an insulator made of an electrically insulating material consisting of a cylindrical portion, and at least one of the two coils is fitted into the cylindrical portion and stored between the cylindrical portion and the substantially L-shaped portion of the insulator. At the same time, the leakage path core is housed between the cylindrical portion and the approximately L-shaped portion of the insulator, and an annular insulating plate is interposed between the housed coils and the leakage path core. A leakage transformer, characterized in that the leakage transformer is fitted into the cylindrical portion and housed between the cylindrical portion and the substantially L-shaped portion of the insulator.