JPH0511421U - Inverter transformer - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent an increase in the thickness of the transformer body due to mounting of a thermal fuse in an inverter transformer. [Structure] Primary and secondary coils 4 and 5 are wound around a coil bobbin 6 having thick portions 7a and 8a in which pin terminals 9 and 10 are planted at both ends, and the secondary coil 5 has a plurality of intermediate flanges 13. A substantially box-shaped storage portion 1a that covers the upper portion of the coil portion, and a thickened portion 7a, 8a In an inverter transformer in which a front cover 1 having a flange 1b located above pin terminals 9, 10 and the like is capped and an iron core 11 is incorporated in the upper part thereof, one end of the flange 1b of the front cover 1 is provided. The portion is extended to the outside in the horizontal direction to form a slab 1b ', and the thermal fuse 2 is attached to the upper part of the slab 1b'.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small-sized inverter transformer, which is used by being incorporated in an inverter and has a mounting structure of a temperature fuse.

[0002]

[Prior Art]

 In this type of transformer, conventionally, the thermal fuse is mounted on the upper part of the transformer and fixed by an adhesive.

[0003]

[Problems to be solved by the device]

 As a result, the overall thickness increases, which hinders miniaturization.

The present invention has been proposed in view of the above, and an object thereof is to miniaturize the thermal fuse by arranging the thermal fuse at a position that does not affect the thickness of the transformer main body. To provide a transformer for an inverter.

[0005]

[Means for Solving the Problems]

 In the present invention, primary and secondary coils 4 and 5 are wound around a coil bobbin 6 having thick portions 7a and 8a having pin terminals 9 and 10 implanted at both ends, and the secondary coil 5 has a plurality of intermediate portions. A substantially box-shaped storage portion 1a that covers the upper portion of the coil portion is formed in the assembly A that is divided into multiple parts by the flange 13, and the thick portion is formed by projecting outward at the lower portion of the storage portion 1a. 7a, 8a, pin terminals 9, 10, etc. In the transformer for an inverter in which a front cover 1 provided with a flange 1b located above is covered and an iron core 11 is incorporated in the upper part of the front cover 1, One end of the flange 1b is extended outward in the horizontal direction to form a sloping portion 1b ', and the temperature fuse 2 is attached to the upper portion of this sloping portion 1b' to achieve the above object. Has achieved.

[0006]

[Action]

 In order to secure the edge distance between the assembly in which the coil is wound around the coil bobbin and the iron core incorporated in the assembly, one of the flanges formed under the front cover, which is attached to the upper part of the outer periphery of the assembly, is moved horizontally. The extension is extended to form the overhang portion 1b ', and the thermal fuse is arranged on the upper portion so that the size of the thermal fuse does not affect the thickness of the transformer body. Further, the thermal fuse 2 can be easily attached via a fixture without using an adhesive.

[0007]

【Example】

 1 is a perspective view of a first embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. In FIG. 1, reference numeral 1 is a front cover made of synthetic resin. One side of the flange 1b is extended with an uneven portion 1b ', and the thermal fuse 2 is attached to the upper portion of the cover 1b through a fixture 3. There is.

That is, the front cover 1 is for covering the front side of the assembly A of the coil bobbin 6 around which the primary and secondary coils 4 and 5 are wound, as shown in detail in FIG. The side cover 1 is a substantially box-shaped storage portion 1 that covers the front side of the assembly A, such as the top and side surfaces of the windings 4 and 5 wound between the flanges 7 and 8 formed on both sides of the coil bobbin 6. a, and a flange 1b having a substantially rectangular frame shape and extending outwardly in the horizontal direction below the outer periphery thereof.

The flange 1b is arranged so as to cover the upper surfaces of the thick portions 7a and 8a formed below the flanges 4 and 8 on both sides of the coil bobbin 6, respectively.

The thick portions 7a and 8a are extended in the axial direction of the coil bobbin 6, and a plurality of pin terminals 9 and 10 which are also extended in the axial direction are planted in the respective end faces. ing. Then, as described above, the front cover 1 is attached to the surface of the coil bobbin 6 around which the primary and secondary coils 4 and 5 are wound, and the accommodating portion 1a stores the primary and secondary coils 4 and 5. The upper surface and the side surface are covered, and the flange 1b is located on the upper surface side of the thick portions 7a, 8a and the like.

Next, the EE type iron core 11 made of ferrite is incorporated from both sides in the axial direction of the coil bobbin 6. That is, the central leg 11a of the iron core 11 is inserted into the window portion 6a of the hollow body portion of the coil bobbin 1 through the notched window portion 1c formed at the end of the storage portion 1a of the front cover 1, and Both legs 11b of the iron core 11 are arranged on the sides of the flange 1b on the side of the coil, and the connecting portions 11c of each leg are arranged on the flanges 1b on the thick portions 6a, 7a. .

Therefore, the front side of each coil 4, 5 is covered by this housing 1a, and both ends of the flange 1b are located on the terminals 9, 10 to which the lead wires of each coil 4, 5 are connected. Since the iron core 11 is incorporated above the front cover 1 and the front cover 1 is interposed between the iron core 11 and the coils 4 and 5, a sufficient creeping distance can be secured between the two.

Further, one end side of the flange 1b is extended toward the axial direction of the coil bobbin 6, and a temperature fuse 2 for shutting off the circuit when an abnormal temperature rises is provided on the extended side portion 1b '. Mounted. For attachment, for example, an inverted U-shaped fixture 3 is used, and the fixture 3 is inserted into a hole (not shown) provided in the back portion 1b 'so as to press the terminal portion of the thermal fuse 3. It does not need to use an adhesive. The thermal fuse 2 is attached in contact with one end surface of the iron core 11 from the viewpoint of thermal conductivity. In this case, the thermal fuse 2 does not project upward from the upper surface of the iron core 11. Moreover, even if it protrudes, it is slight and does not adversely affect the thickness of the transformer.

FIG. 3 shows the back side of assembly A. In this transformer, the primary coil 4 is wound between the flange 7 on one side of the coil bobbin 6 and the intermediate flange 12 facing the flange 7. The lead wire 4a of the primary coil 4 is led out to the outside through a lead wire guide groove 7b formed on the bottom surface of the thick portion 7a located on the back side of the coil bobbin 6, and is entwined with a predetermined pin terminal 9.

Further, the secondary coil 5 is divided by the other intermediate flange 13, and the lead wire 5a at the beginning of the winding is connected to the body portion of the coil bobbin 6 through the lead wire guide groove 8b formed on the bottom surface of the thick portion 8a. Guided by the side and wound.

The secondary coil 5 is multi-divided and wound in each region via the intermediate flange 13 via a notch a formed in one end side of the bottom of the intermediate flange 13, and the lead wire 5 b at the end of the winding. Is drawn from the side of the intermediate flange 12 toward the thick portion 8a side through a guide groove formed on the other end side of the intermediate flange 13 extending outward, and is entwined with the pin terminal 10.

As shown in FIG. 4, a rear cover 14 made of synthetic resin having a substantially U-shaped cross section is attached to this assembly A, for example, from the left side in the illustrated state, to the bottom plate 14 a of the rear cover 14. If the side plate 14b and the bent portion 14c bent inward above the side plate 14b are positioned between the iron core 11 and the thick portions 7a, 8a of the coil bobbin 6, the assembly A of the assembly A is assembled. The bottom and sides can be covered and protected to complete the inverter transformer.

FIG. 5 shows a second embodiment of the present invention, in which the thermal fuse 2 is attached to the back portion 1b 'differently. That is, in this example, a plate-shaped fixture 3A is erected at the end of the ridge portion 1b ', and the temperature fuse 2 is sandwiched and fixed by the fixture 3A and the end face of the iron core 11.

FIG. 6 shows a third embodiment of the present invention. In this embodiment, a pair of pin-shaped fixtures 3B for sandwiching the lead wire portion of the thermal fuse 2 are erected on the raised portion 1b ′. The thermal fuse 2 is fixed via this fixing tool 3B.

FIG. 7 shows a fourth embodiment of the present invention, in which the upper part of the fixture 3A is slightly longer than that of the second embodiment, and the bent portion 3a which is bent inward is integrally formed. By this, the thermal fuse 2 is fixed.

[0021]

[Effect of the device]

 As described above, according to the present invention, one end portion of the flange 1b of the front cover 1 that covers the front side of the coil or the coil bobbin 6 is extended in the lengthwise direction to form the overhang portion 1b ', and the thermal fuse is provided on the upper portion thereof. Since the mounting space is secured by mounting No. 2, the thickness of the transformer is not increased by the thermal fuse 2.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the above.

FIG. 3 is a bottom view of an assembly in which a coil is wound around a coil bobbin.

FIG. 4 is an explanatory view of attaching the back cover to the assembly.

FIG. 5 is an explanatory view of essential parts of a second embodiment of the present invention.

FIG. 6 is an explanatory view of essential parts of a third embodiment of the present invention.

FIG. 7 is an explanatory view of a main part of a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Front Cover 1a Storage Part 1b Flange 1b 'Side Part 1c Window Part 2 Temperature Fuse 3 Fixing Tool 3A Fixing Tool 3B Fixing Tool 4 Primary Coil 5 Secondary Coil 6 Coil Bobbin 6a Window 6a 7 Flange 7a Thick Section 8 Flange 8a Thick part 9,10 pin terminal 11 Iron core 12,13 Intermediate flange 14 Back cover

Claims (1)

[Scope of utility model registration request] 1. A coil bobbin 6 having a thick portion 7a, 8a having pin terminals 9, 10 implanted at both ends, respectively,
An assembly A formed by winding the secondary coils 4 and 5 and the secondary coil 5 being multi-divided by a plurality of intermediate flanges 13, an approximately box-shaped storage portion 1a for covering the upper portion of the coil portion, and this storage portion. A front cover 1 having a flange 1b which is formed so as to project outward at a lower portion of 1a and which is located above the thick portions 7a and 8a and pin terminals 9 and 10 is capped, and an iron core 11 is provided on the front cover 1. In the built-in inverter transformer, one end of the flange 1b of the front cover 1 is extended outward in the horizontal direction to form an uneven portion 1b ', and the thermal fuse 2 is provided on the upper portion of the uneven portion 1b'. Inverter transformer characterized by being installed.