JPH0727130U - Inverter transformer - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to prevent noise from the transformer for an inverter and to improve the withstand voltage, and also to improve manufacturing defects. [Structure] The E-shaped cores 2a and 2b and the bobbin 1 and the E-shaped cores 2a and 2b and the insulator 3 are adhered to each other, and the wedge-shaped projections 4 and the insulator 3 are attached to the central part of the tip on the inner side of the eaves of the lower short side of the insulator 3. An inverter transformer in which a plurality of rectangular parallelepiped projections are provided on the outside of the eaves of the upper long side, and the tips of the U-shaped terminals 7 and 8 of the carrageer terminals are tapered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inverter transformer used in a power supply circuit for driving a discharge lamp or the like with an inverter.

[0002]

[Prior art]

 A small inverter uses a power supply circuit driven from an LCD backlight power supply to a large electric locomotive, and a transformer for generating a high voltage is indispensable for the power supply circuit. Ideas have been created and used. Especially in recent years, there has been a strong demand for light, thin, short, and small products, but for the surface mount devices, further miniaturization is required. Actually, 3-51821, 4-117421, and 3-171607. Etc.

[0003]

[Problems to be solved by the device]

 However, if the switching pulse used is in the audible week band, the resonance phenomenon due to harmonics causes noise in the entire transformer.Because of the miniaturization, the lead-in wire and the secondary winding cannot be separated, so the Since the voltage performance is low, the lead wire and the lead wire are tightly wound around the carrage terminal so that they cannot be removed, there are problems such as easy disconnection and easy removal of the E-shaped core from the bobbin during assembly.

[0004]

[Means for Solving the Problems]

 The present invention provides a wedge-shaped protrusion and a plurality of rectangular parallelepiped-shaped protrusions at the most suitable place for adhering each other of a bobbin, an E-shaped core and an insulator at the most effective place in order to solve the above problems. We also devised a taper on the tip of the carrage terminal.

[0005]

【Example】

 FIG. 1 is an exploded perspective view of an inverter transformer according to the present invention, FIGS. 2 and 3 are partially longitudinal sectional views, and FIG. 4 is a lateral sectional view, which will be described below.

By inserting symmetrical E-shaped cores 2a and 2b from the left and right into the hollow portion of the bobbin 1, the end faces of the outer leg and the middle leg that are in contact with each other are bonded with an adhesive, and the hollow portion of the bobbin 1 Then, an adhesive is filled in a gap between the middle leg and the middle leg so as to cover the entire circumference in a certain range around the end face of the middle leg. Further, the end faces of the both outer legs are adhered to each other with an adhesive, and the gap between the insulator 3 and the both outer legs is filled with the adhesive all around a certain range centered on the end faces of the both outer legs. Since the portion of the insulator 3 that accommodates the outer legs forms a tunnel having a square cross section, the adhesive does not leak outside.

An E-shaped core is provided because a wedge-shaped protrusion 4 (hereinafter, the description of the wedge-shaped protrusion on both short sides is represented by one side) is provided inside the tip central portion of the eaves on both short sides on the lower side of the insulator 3. When 2a and 2b are inserted into the hollow portion of the bobbin 1, the E-shaped cores 2a and 2b do not come out because the wedge-shaped projection 4 serves as a stopper.

In FIG. 4, a plurality of rectangular parallelepiped protrusions 5 are provided on the upper side of the insulator 1 and outside the eaves of the long side near the lead-in line 6 a of the secondary winding section 9 to draw out the secondary winding section 9 and the secondary winding section 9. Separated from line 6b.

U-shaped terminals 7 and 8 are used for the lead-in wire 6a and the lead-out wire 6b of the secondary winding portion 9 to separate the charge terminal portion and the connection terminal portion from each other. Since the tips of the carrage terminals 7a and 8a of 7 and 8 are tapered in a funnel shape, the lead wire 6a and the lead wire 6b are provided with a talumi so as not to break the wire. It does not come off even when wrapped around.

As shown in FIG. 2, since the relationship of GAP1 ≧ GAP2 is satisfied, it is also possible to prevent a defect caused by expansion of the bobbin 1 due to heat generated by the E-shaped cores 2a and 2b when used for a long time. Can be done.

[0011]

[Effect of device]

 As described above, the inverter transformer according to the present invention can prevent noise, prevent the E-shaped core from coming off during manufacturing, improve the withstand voltage, prevent disconnection of the lead-in wire and the lead-out wire, and prevent problems due to heat. There are merits such as prevention.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an inverter transformer according to the present invention.

FIG. 2 is a partial vertical sectional view of an inverter transformer according to the present invention.

FIG. 3 is another partial cross-sectional view of an inverter transformer according to the present invention.

FIG. 4 is a partial cross-sectional view of an inverter transformer according to the present invention.

[Explanation of symbols]

 1 bobbin 2a E-type core 2b E-type core 3 insulator 4 wedge-shaped protrusion 5 rectangular parallelepiped protrusion 6a lead-in line 6b lead-out line 7 U-shaped terminal 7a carrage terminal 8 U-shaped terminal 8a carrage terminal 9 secondary winding 10 adhesive

Claims (3)

[Scope of utility model registration request] 1. A bilaterally symmetrical E-shaped core is inserted into the hollow portion of a substantially elliptical bobbin having a plurality of collars and a plurality of terminals at both ends,
An inverter transformer in which the bobbin and the E-shaped core are entirely covered with an insulator having a flat lower surface interposed between the bobbin and the E-shaped core and having an upper and lower eaves all around,
Both ends of the outer legs of the mold core and the middle leg are joined to the end face and the end face of the middle leg and a part of the entire periphery of the end face of the middle leg, and the bobbin, and a part of the entire periphery of the end faces of the outer legs and the end face of the outer leg. An inverter transformer characterized by having an insulator bonded. 2. A tunnel having a square cross-section is formed in a portion of the insulator that accommodates both outer legs of the E-shaped core, and a wedge-shaped projection is provided inside a central portion of the eaves tip on both lower short sides. The transformer for an inverter according to claim 1, wherein a plurality of rectangular parallelepiped projections are provided outside the eaves of the upper long side. 3. The inverter transformer according to claim 1, wherein a tip of the carrage terminal part of the terminal separating the carrage terminal part and the connection terminal part is tapered in a funnel shape.