JP2995165B2 - Transformer core mounting bracket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for mounting a transformer core used in consumer electric equipment.
The present invention relates to a transformer core mounting bracket capable of easily mounting a core having an arc-shaped round portion into which a substantially cylindrical coil bobbin is incorporated and to a bottom plate without play.

[0002]

2. Description of the Related Art Conventionally, this type of transformer has a substantially rectangular shape as a whole as shown in FIG. 11 on a mounting plate 30 as shown in FIG. A core 31 was attached, a coil bobbin 32 composed of coil bobbin half bodies 32a, 32a was attached to the core 31, and a coil was wound around the body while rotating the coil bobbin 32.

[0003] That is, the reason why the cross section of the core 31 is substantially circular or elliptical is to smoothly rotate the coil bobbin 32 attached to the outer periphery thereof.

However, after winding the coil, it is necessary to integrally fix the coil bobbin 32 and the core 31 with the mounting plate 30 in order to prevent rattling.

[0005]

[Problems to be solved by the invention]

In this case, as shown in FIG. 11 and FIG. 12, a linear and strip-shaped fixing portion 34 formed on the mounting plate 30 is inclined obliquely outward to a jig such as pliers (not shown). ) And bend each time toward the core 31 while abutting the flange side of the coil bobbin 32,
The coil bobbin 32 was fixed to the mounting plate 30. Therefore, there is a problem that the fixing operation is very complicated.

The present invention has been proposed in view of the above, and it is an object of the present invention to easily mount a core having an arc-shaped round portion incorporated in a cylindrical coil bobbin in a state without play. It is an object of the present invention to provide a possible transformer core fitting.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is characterized by the following constitution. That is, according to the present invention,
A substantially T-shaped plate having a base contacting an arc-shaped round portion of a core having a substantially cylindrical coil bobbin incorporated in the outer periphery and an extension extending downward from the base. A core mounting bracket formed to mount the core to the bottom plate in a state without play, wherein the lower end of the base is bent while the lower end of the extension is inserted through the bottom plate, so that the lower end of the base is rounded. An elastically deformable protrusion is provided on the extension portion, the protrusion being capable of being pressed against the portion, and projecting downward to reduce the amount of protrusion, and elastically projecting outward to abut the inner surface of the core. A metal fitting for mounting a core of a transformer is provided.

According to the present invention, there is provided the metal fitting for a transformer core according to claim 1, wherein the vicinity of the boundary between the base and the extension has a shape corresponding to the round part. The present invention provides a transformer core mounting member closely adhered along a round portion of the transformer.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a core mounting bracket according to a first embodiment of the present invention is assembled to a bottom plate.
FIG. 2 is a perspective view showing a transformer to which the metal fitting of FIG. 1 is applied.

As shown in FIG. 2, the transformer 1 comprises a pair of coil bobbins 3 having coil bobbin halves 3a and 3a integrally formed in a cylindrical shape and having flanges 2 formed at both ends in the axial direction. A transformer body comprising a coil (not shown) wound around the body of the transformer 3, a core 4 into which the respective coil bobbins 3 are incorporated, and having a substantially rectangular shape as a whole and a substantially circular longitudinal section; The mounting bracket 6 includes a bottom plate 10 to which the transformer main body is mounted by the core mounting bracket 6.

As shown in FIG. 1, the bottom plate 10 is formed in a substantially rectangular shape, has slits 9a for assembling metal fittings for attaching a core at both ends, and has a pair of upright pieces 9b. The transformer main body is mounted between the upright pieces 9b. In FIG. 2, reference numeral 11 denotes a connector with a pin terminal made of an insulating resin molded product. A pin terminal 12 electrically connected to a lead wire of a coil wound around the coil bobbin 3 projects from an upper portion. I have.

The metal fitting 6 for attaching the core is made of metal such as an iron plate.
As shown in FIG. 1, it is formed in a substantially T-shaped plate shape. The core mounting bracket 6 includes a base 7 whose lower end surface 7a is in contact with a round portion 4a (see FIGS. 2 and 3) formed in an arc shape of the core 4 and extends downward from the longitudinal center of the base 7. The extension portion 8 extends toward. The extending portion 8 is processed so as to be drawn out from the inside toward the outside from the end on the base 7 side to the substantially central portion in the vertical direction, and the uncut portion is an elastic deformation projection 8b. In addition, 8a is a long hole formed by extraction processing.

As shown in FIG. 3, the elastic deformation projection 8b projects downward (from the base 7 side to the tip of the extension 8) so that the amount of projection gradually decreases. The projection 8b is configured to elastically contact the inner surface 4b of the core 4. As shown in FIG. 1, the vicinity of the boundary 9 between the base 7 and the extension 8 is formed in an arc shape corresponding to the shape of the round part 4 a of the core 4, and the round part 4 a
So that it can be closely adhered to.

When assembling the transformer body to the bottom plate 10 with the core mounting bracket 6, the bottom plate 10 is fixed using a jig, and the transformer body is placed between the upright pieces 9b of the bottom plate 10 as shown in FIG. Deploy. Next, the elastic deformation projection 8b
The lower end of the extension 8 is inserted into the slit 9 a of the bottom plate 10 with the outside facing. In this inserted state, as shown in FIG. 4, while applying tension to the bottom plate 10 in the direction indicated by the arrow A, the lower end of the extension 8, that is, the portion protruding from the slit 9 a of the extension 8 is positioned inside (arrow). (B direction).

That is, with the flat tip 13a of the bending tool 13 shown in FIG. 5 abutting against the lower end of the extension 8 from the outside, the bending tool 13 is moved inward (in the direction of arrow C). Move. Thus, the tip 13a of the bending tool 13 moves along the bottom plate 10 in the recess 10a of the bottom plate 10, and the lower end of each extension 8 is bent inward in the recess 10a.

By this bending, the core mounting bracket 6 moves downward until the vicinity of the boundary portion 9 comes into close contact with the round portion 4a of the core 4, and the transformer main body is mounted on the bottom plate 10. In the present embodiment, as described above, since the extension portion 8 is bent while applying tension in the direction of the arrow A, the transformer main body can be fixed to the bottom plate 10 in a state of being strongly tightened.

In the present embodiment, the vicinity of the boundary 9 is formed in an arc shape corresponding to the shape of the round portion 4a.
And the round portion 4a are in close contact with each other.
The transformer main body is fixed to the bottom plate 10 in a state where rattling is sufficiently suppressed.

Further, in this embodiment, when the core mounting bracket 6 moves toward the bottom plate 10 due to the bending of the lower end of the extending portion 8, the elastically deforming projections 8 of each core mounting bracket 6 are provided.
b elastically contacts the inner surface 4b of the core 4,
The inner surface 4b is urged outward. In this case, since the elastic deformation projection 8b projects in a tapered shape, the urging force effectively acts on the core 4 and the backlash of the core 4 in the axial direction of the coil bobbin 3 is sufficiently suppressed.

Further, in this embodiment, unlike the conventional case,
Since the strip-shaped fixing portion 34 shown in FIG. 11 needs to be bent obliquely outward to the core side by using pliers or the like while contacting the flange side of the coil bobbin, the transformer body is fixed to the bottom plate 10. Is easy. In the above embodiment, the round portion 4a of the core 4 in contact with the vicinity of the boundary portion 9 has an arc shape, but may have an elliptical shape, and can be generally applied to a core in which the round portion 4a has an arc shape. . In this case, the vicinity of the boundary part 9 is defined as the round part 4.
The shape corresponding to the shape of a is preferred from the viewpoint of suppressing the rattling of the core.

In the above embodiment, the elastic deformation projection 8b
Is formed from the end on the base portion 7 side to the substantially central portion in the vertical direction, but may be formed further downward, or may be formed from the center portion to the base portion 7 side. It goes without saying that the length and width of the elastically deforming projection 8b can be appropriately changed depending on the material of the metal fitting 6 for the core.

In the above embodiment, the case where the lower end of the extension 8 is bent inward is described. However, the lower end of the extension 8 may be bent outward. That is, the roller 14a rotatably supported by the bending tool 14 shown in FIG. 6 is applied to the lower end of the extension 8 from the inside while applying tension in the same direction (the direction of arrow A in FIG. 6). In the contact state, the bending tool 14 is moved outward (in the direction of arrow D), and is further moved in the direction of arrow E in FIG. 6 along the standing pieces 9b. As a result, as shown in FIG. 7, the lower end of the extension portion 8 is in a state where the upright piece 9 b is sandwiched, and the transformer body is attached to the bottom plate 10 by the core attachment metal 6 without rattling.

FIG. 8 is a perspective view of a core mounting bracket according to a second embodiment of the present invention. The core mounting bracket 15 of the present embodiment is formed by extracting two portions from the end on the base portion 18 side of the extension portion 16 to the substantially central portion in the vertical direction at intervals in the width direction of the extension portion 16. Are formed as elastic deformation projections 17, 17, respectively, and only this point is different from the first embodiment. Each of the elastic deformation projections 17 protrudes downward (from the base 18 to the tip of the extension 16) so that the amount of projection gradually decreases.

Also in this embodiment, the core mounting bracket 15 is used.
The method of mounting the transformer body to the bottom plate 10 by the method described in the first embodiment is the same as that of the first embodiment. That is, the bottom plate 1 is
0, the transformer body is arranged between the upstanding pieces 9b of the bottom plate 10, and the elastic deformation projections 17 are directed outward.
The transformer body is attached to the bottom plate 10 by inserting the lower end of the extension 16 into the slit 9a of the bottom plate 10 and bending the lower end inward or outward as in the first embodiment. The elastic deformation projection 17 is elastically in contact with the inner surface 4b of the core 4 as in the first embodiment. In this embodiment, as in the previous embodiment, the transformer main body can be easily mounted without rattling. In this embodiment, since two elastic deformation projections 17 are formed, the spring property is improved,
Thus, it can be securely fixed in a state without rattling.

FIG. 9 is a perspective view of a core mounting bracket according to a third embodiment of the present invention. The core mounting bracket 19 of this embodiment is different from the above-described first embodiment in the elastic deformation projection 20, and the other configuration is the same as that of the first embodiment. That is, the elastically deforming projection 20 of the present embodiment is formed into a substantially V-shape having a side wall 20a from the longitudinal central portion of the upper end of the base 21 to the substantially central portion of the extending portion 22 in the longitudinal direction. Things. The side wall 20a protrudes downward (from the base 21 to the distal end of the extension 22) so that the amount of projection gradually decreases.

Also in this embodiment, the core mounting bracket 19 is used.
The method of attaching the transformer body to the bottom plate 10 is as follows.
This is the same as the first embodiment. That is, the bottom plate 10 is fixed using a jig, the transformer body is arranged between the upstanding pieces 9 b of the bottom plate 10, and the lower end of the extension portion 22 is attached to the bottom plate with the elastic deformation projection 20 facing outward. The transformer main body is attached to the bottom plate 10 by inserting the lower end portion into the inside or outside similarly to the first embodiment. As in the first embodiment, the side wall 20a of the elastic deformation projection 20 is in elastic contact with the inner surface 4a of the core 4. In this embodiment, as in the previous embodiment, the transformer main body can be easily mounted without rattling. In this embodiment,
Unlike the first embodiment and the second embodiment, the elastic deformation protrusion 2
In the case of machining 0, a cutout step is not necessary, and the elastic deformation projection 20 protruding only by bending from the inside to the outside can be formed, so that manufacturing is easy.

FIG. 10 shows a core mounting bracket according to a third embodiment of the present invention. The metal fitting 23 for the core according to the present embodiment includes an elastically deforming projection 24 at the extension 25.
The second embodiment is the same as the first embodiment except that a pair of embossing projections 27 are formed by being embossed toward the elastic deformation protruding portion 24 with a space therebetween.

Also in this embodiment, the core mounting bracket 23
The method of attaching the transformer body to the bottom plate 10 by
This is the same as the embodiment. That is, using the jig, the bottom plate 10
Is fixed, the transformer body is arranged between the upstanding pieces 9b of the bottom plate 10, and the lower end of the extension 25 is inserted through the slit 9a of the bottom plate 10 with the elastic deformation projection 24 facing outward,
This lower end is attached by bending it inward or outward as in the first embodiment.

The elastic deformation projections 24 are formed in the same manner as in the first embodiment.
It is in elastic contact with the inner surface 4a of the core 4. Also in this embodiment, as in the first embodiment, the transformer main body can be easily mounted without rattling. Further, in the present embodiment, as described above, since the pair of projections 27 are formed, the strength of the extension 25 near the elastic deformation projection 24 is sufficiently ensured.

[0030]

As described above, according to the first aspect of the present invention,
A substantially T-shaped plate having a base contacting an arc-shaped round portion of a core having a substantially cylindrical coil bobbin incorporated in the outer periphery and an extension extending downward from the base. A core mounting bracket formed to mount the core to the bottom plate in a state without play, wherein the lower end of the base is bent while the lower end of the extension is inserted through the bottom plate, so that the lower end of the base is rounded. An elastically deformable protrusion is provided on the extension portion, the protrusion being capable of being pressed against the portion, and projecting downward to reduce the amount of protrusion, and elastically projecting outward to abut the inner surface of the core. Therefore, it is possible to provide a transformer core mounting bracket capable of easily mounting a core having an arc-shaped round portion incorporated in a cylindrical coil bobbin without play. According to the second aspect of the present invention, the vicinity of the boundary between the base portion and the extension portion has a shape corresponding to the arc-shaped round portion of the core, and can be closely adhered along the round portion. The core is more
Mounted without rattling.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a core mounting member according to a first embodiment of the present invention is assembled to a bottom plate.

FIG. 2 is a perspective view showing a transformer to which the core mounting bracket according to the first embodiment of the present invention is applied.

FIG. 3 is a view showing a step of fixing the transformer main body to the bottom plate with the core mounting bracket according to the first embodiment of the present invention, showing a state before the core mounting bracket is inserted into the bottom plate. .

FIG. 4 is a view showing a step of fixing the transformer main body to the bottom plate by the core mounting bracket according to the first embodiment of the present invention, showing a state where the core mounting bracket is inserted into the bottom plate.

FIG. 5 is a perspective view showing a state in which a lower end portion of the core mounting bracket according to the first embodiment of the present invention is bent inward by a bending tool.

FIG. 6 is a perspective view showing a state in which a lower end portion of the core mounting bracket according to the first embodiment of the present invention is bent outward by a bending tool.

FIG. 7 is a perspective view showing a state in which the lower end of the core mounting bracket according to the first embodiment of the present invention is bent outward and mounted on the bottom plate.

FIG. 8 is a perspective view showing a core mounting bracket according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing a core mounting bracket according to a third embodiment of the present invention.

FIG. 10 is a perspective view showing a core mounting bracket according to a fourth embodiment of the present invention.

FIG. 11 is a perspective view of a transformer to which a conventional mounting plate is applied.

FIG. 12 is a perspective view of a conventional mounting plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transformer 3 Coil bobbin 4 Core 4a Round part 4b Inner surface 7 Base 8 Extension part 8b Elastic deformation projection 9 Boundary part 10 Bottom plate 17 Elastic deformation projection 20 Elastic deformation projection 24 Elastic deformation projection

Claims (2)

(57) [Claims] 1. A substantially cylindrical coil bobbin (3) on the outer periphery.
The round part (4) forming the arc of the core (4)
The core (4), which is formed in a substantially T-shaped plate and includes a base (7) abutting on a) and an extension (8) extending downward from the base (7). A core mounting bracket for mounting the base portion on the bottom plate (10) without play, wherein the base portion is bent by bending a lower end portion of the extension portion (8) through the bottom plate (10). The lower end of (7) can be pressed into contact with the round portion (4a), protrudes downward so as to reduce the amount of protrusion, and outwardly contacts the inner surface (4b) of the core (4) elastically. An elastic deformation projection (8b, 17, 20, 24) projecting toward the extension (8) is provided on the extension (8). 2. The vicinity of a boundary portion (9) between the base portion (7) and the extension portion (8) has a shape corresponding to the round portion (4a), and is closely attached along the round portion (4a). 2. A transformer core mounting bracket according to claim 1, wherein the mounting bracket is capable of being mounted.