Small-sized transformer core

[Detailed Description of the Invention]

This invention relates to the iron core structure of the small transformer used for a glint-of-light luminescent organ, a camera, lighting apparatus, a small electronic computer, other general electric communication machines, etc. for photography. the E-E type which consists of isomorphous-like iron core 1.2 as this kind of transformer is shown in Drawing 1 -- or -- although an E-1 type thing is most although not illustrated, and are-izing [ length A1 beside an iron core / 10.2 mm and height B1 ] and 2' and the thing which is about 4 mm are operation-ized for 11 mm and width CI now In this invention, an effective means to miniaturize such a transformer in addition without spoiling performance of operation is proposed. Although it is possible to make iron core l and 2 reduce and to attain the miniaturization of the whole transformer since the size is determined by a transformer as shown in Drawing 1 by the length between the length beside an iron core, height, and the peripheral face of the coil overflowing before and after the iron core, However, if constituted in this way, the problem of mechanical strength and electric iron quantity occurs. That is, on the relation which comprises a ferrite material of high amplitude permeability, the above-mentioned iron core l and 2 will be damaged in the manufacture process of an iron core or a transformer, if a leg cross-sectional area, especially the cross-sectional area of right-and-left legs 1a and 2a are made not much small. Therefore, the product in which the cross-sectional area is about 4.8X1.2 mm is made into the limit now. on the other hand -- central legs 1b and 2b as an inner leg -- right-and-left legs 1a and 2a -- it is common to consider it as an each twice as many cross-sectional area as this -- central legs 1b and 2b and right-and-left legs 1a and 2a -- the necessary minimum air clearance which can loop around coil 3 made to generate a predetermined output will be required between each. It is central leg 1b in order for there to be a limit in making iron core 1.2 reduce and to attain a miniaturization by force from this. When making cross-sectional areas, such as 2b, reduce, it becomes insufficient [ iron quantity ] and cannot obtain a predetermined output. So, in the present invention, since transformer shape is miniaturized, without spoiling performance of operation, the feature is that it constituted iron core structure as the following. While carrying out curve formation so that the inner leg equipped with a coil looping-around object and the leg outside one located in a way outside this coil looping-around object may meet the peripheral face of a coil looping-around object in the inside of the leg outside the above in a transformer iron core with 2 really formed piece by a ferrite material, The small transformer iron core which parallels the whole surface which is opposite to a leg outside the leg in the above in an outside leg inside, and carries out upheaval formation. Hereinafter, although the example of the present invention is described, the point comes for this explanation up, and it attaches and states to the principle of the present invention. In transformer iron core 12 of Drawing 1, it will be in a circularly near state as [ showed / from the section of the right-angled direction to Limbs of central legs 1b and 2b making the square / in The first figure 4b / the peripheral face of coil 3 looped around ]. therefore -- the transformer which uses such an iron core l and 2 -- the side of an iron core -- a division -- the size of the outside is defined by Ward Dl between A l, il'+iB l, I!, and the peripheral face of the Wear(ed) coil. Next, iron core 4.5 of Drawing 2 is the example which had the same iron quantity as compared with iron core 1.2 of Drawing 1, and carried out flattening of the shape. In this iron core 4.5, since central legs 4b and 5b become tabular as shown in Drawing 2 (b), looping-around Monkey coil 6 serves as an elliptical form. Therefore, if length between the coil peripheral faces which overflow into around 4.59 iron cores is made into B-2, it will be set to B-2<DI, and if iron core width is set to 02, it will be set to C2<CI and will think from this point, and the transformer form is reduction-ized. However, since both horizontal length A2 and height B-2s of an iron core serve as A2>Ah B-2>Bl, the shape of the whole transformer is not small. 4a and 5a are right-and-left legs. Iron core 7.8 of Drawing 3 is the example which had the same iron quantity as compared with iron core 1.2 of Drawing 1 and to which it made iron core width expand. Since central legs 7b and 8b are prolonged crosswise [ iron core ] in this iron core 7.8, with it, looped-around coil 9 serves as an elliptical form which sets a long axis as the iron core cross direction. Although length A3 and height B3 of a transverse direction of an iron core will serve as A3<A.I. Artificial Intelligence and B3<Bl if constituted in this way, length B3 and iron core width C3 between the coil peripheral faces which see and come out before and after iron core 7.8 are set to B3>DI and C3>C1, and the shape of the whole transformer is not small -- in addition, 7a and 3a are right-and-left legs. Iron core 10.11 of Drawing 4 is the same in iron quantity as compared with iron core l of Drawing 1, and 2 (it carries out, iron core width is expanded, and central leg 10b and Ilb are right-and-left legs 10a.). It is as nothing as tabular [ which was prolonged in the tta direction ]. If constituted in this way, the requirements for the miniaturization of the transformer iron core shown in Drawings 2 and 3 can be satisfied. That is, the length of a coil peripheral face serves as D4=D2 and B4<Dl, and];i To serves as 134 = 83 and B4<Bl. the length of a transverse direction -- this case into A4>A.I. Artificial Intelligence -- A4 -- 8 -- it approaches considerably to 1. Therefore, it becomes possible by constituting a transformer iron core, as shown in Drawing 4 to make the shape of the whole transformer reduce. moreover -- since coil 12 is not close to central leg 10b and llb and opening 12a certainly arises on the inner skin of coil 12, and the side of central leg lObllb -- this empty 11jt12a -- To appoint -- central leg lOb and 11b are made into an elliptical form like. Only thick in this way, then its part can shorten the length of the transverse direction of the leg concerned for central legs 10b and 11b. On the other hand, since space 12b will be generated between the internal surface of right-and-left l11j10a and lla, and a coil peripheral face if iron core width C4 is made to expand as shown in Drawing 4, right-and-left leg toalla is formed so that this space 12b may be filled. Since iron ■ will not decrease in number even if it forms right-and-left leg 10a and the central portion of lla in closing in if it does in this way, it becomes possible to shorten the length A4 of the transverse direction of an iron core. Transformer iron core 13 and I4 which were shown in Drawing 5 satisfy the above-mentioned conditions, and according to the iron core concerned, it is set to A5<aluminum, B5<Bl, and D5<Di, and the one form becomes small as compared with the transformer which uses the iron core of Drawing 1. However, it is nothing to an elliptical form about central leg 13.b and 14b like the example of Drawing 5, And since incurvating circularly the internal surface of right-and-left legs 13a and 14a needs high manufacturing technique, it is unsuitable for improving production efficiency, and it is preferred to constitute like the transformer iron core shown in Drawings 6 and 7 in fact. It projects in the shape of an angle, and transformer iron core 15.16 which is further expanded to Drawings 6 and 7, and is shown in them forms central leg 15b which carried out curve formation and carried out flattening of the internal surface of right-and-left legs 15a and 16a to the polygon over the coil peripheral face, and L6b so that it may meet the inner skin of a coil in the side opposite to the right-and-left leg. Even if constituted in this way, it is clear to acquire the almost same effect as the transformer iron core of Drawing 5. although the attaching position of a terminal pin poses an important problem in what made the transformer form small as mentioned above, in this example, that attaching position constitutes in a part for the both-sides yoke part of central legs 15b and 16b pinched by right-and-left legs 15a and 16a as Notch15c116c, and appears in it. As the broken chain line showed to Drawing 7, the central portion of right-and-left legs 15a and 16a may be pruned. Drawing 8 is a slope figure of the transformer which uses the above-mentioned iron core 15.16, and each of the above-mentioned iron core 15.16 is inserted from the both sides of a bobbin, and it pastes up and comes out of it by the end face of each leg. Reference mark 17 on the figure is the insulating tape which 19 twisted a terminal pin and 18 around the bobbin, twisted it around the coil, and twisted 20 around the coil peripheral face. Drawing 9 is a U-U line sectional view on the 8th figure. By the transformer concerned, terminal pin 17 may be provided in the right-angled direction to central legs 15b and 16b, as shown in Drawing 10. Next, Drawings 11 and 12 are the examples of the present invention carried out as an iron core iron type [ outside 2 pieces ], A polygonal curving surface is formed in the inside of outside legs 21a and 22a, and this iron core 21.22 is outside leg 21a, Notch 21C122G is provided in a part for the yoke part which projects the whole surface of inner legs 21b and 22b which counter 22a in the shape of an angle, and hits the right-and-left side of inner legs 21b and 22b, and at least attachment of a terminal pin forms bW and comes out. Drawing 13 is a slope figure of the transformer which uses the above-mentioned transformer iron core 21.22, and it is the insulating tape which 24 twisted reference mark 23 on the figure around the terminal pin, and twisted it around the bobbin and in which 25 twisted coil 1.26 around the coil peripheral face. Drawing 14 is a W-W line sectional view on the 13th figure. Terminal pin 23 may be provided in the right-angled direction to inner legs 21b and 22b, as shown in Drawing 15. Since the leg inside was incurvated outside the transformer iron core with 2 piece in the present invention in order to meet the peripheral face of a coil, and it projected and the inner leg-side opposite to an outside leg was formed so that it might be mostly parallel to an outside leg inside as described above, It can miniaturize without spoiling performance of operation as compared with this conventional kind of small transformer. Although the above-mentioned example explained per Cocoa type transformer, the present invention can be carried out also as a Cau ■ type transformer.

[Brief Description of the Drawings]

In the expansion front view and Drawing 1 (b) showing the iron core of a fundamental small transformer, Drawing 1 (a) is 0-0 line sectional views on Drawing 1 (a), the [ Drawing 2 thru/or ] --O [ 1 ] figure is a transformer iron core for carrying out a detailed description of the invention The front view of the transformer iron core which carried out flattening of Drawing 2 (a), and the 2nd ffl (b) is a P -P l1it sectional view on Drawing 2 (a), the front view of the transformer iron core to which 3rd [ The ] figure CaA Yo core width was made to expand, and Drawing 3 (b) -- [ on Drawing 3 (a) / the / the Q-Q line sectional view and ] -- the front view of the transformer iron core which carried out flattening of the central leg for 4 figure 341-degree'' iron 'C * width with expansion To 16, Drawing 4 (b) is a R-RtQII side figure on Drawing 4 (a), and Drawing 5 (a) is an ideal expansion front view of a transformer iron core, Expansion front view J figure 7 of 1-lance iron core in which Drawing 5 (b) carried out the s-s line sectional view on Drawing 5 (a), and Drawing 6 made operation-ization easy is a T-T line sectional view on the 6th figure, the [ the slope figure of the transformer by which Drawing 8 used the iron core of Drawings 6 and 7, and / 9th / The / figure The ] -- it takes eight -- the U -LJ 1Jil sectional view on one, the -- theta [ 1 ] figure is the same as Drawing 9 showing the state where the implantation position of the terminal pin was changed... the expansion front view of the transformer iron core which a 1st page figure, and - figure 11 show the example of the present invention, and Drawing 12 -- the V-V line sectional view on the 11th figure, It is the same sectional view as Drawing 14 showing the state where the slope figure of the transformer by which Drawing 13 used the iron core of Drawings 11 and 12, and Drawing 14 changed the W -W line sectional view on the 13th figure, and Drawing 15 changed the implantation position of the terminal pin. 15.16 -I-Lance Iron Core, 15a, 16a-Right-and-Left Leg, 15B, 16 b ... a central leg and 15c, 16 C ... Notch, 17 ... terminal pin, 18 ... bobbin, 19 ... coil, 20 ... insulating tape, 2122 ... a transformer iron core, 21a, 22 a -- and an outside leg, and 21b, 22 b ... white skin and 21C222c [ ... A coil, 26, - and insulating tape. ] ... Notch, 23 ... A terminal pin, 24 ... A bobbin, 25 Applicant for a patent Drawing 1 of Kijima radio incorporated company (C1) Drawing 3 (Q) (b)(Q) (b) !!5 figure (C1) IJO13t) Drawing 6 Drawing 7 Drawing 8 Drawing 10 Drawing 11 The 12th FIIJ 1b Drawing 13 Drawing 114 7'21 /' MikiS>,' / -'/' 25 \> * Drawing 15