JPH06120047A - Transformer and manufacture thereof - Google Patents

Abstract

PURPOSE:To contrive an increase in the number of the leads of a transformer, ease of the design of a substrate pattern and an insulation design and the improvement of the workability for a winding and wiring by a method wherein either or both of post-attaching terminal bases having the leads is/are secured in one side or both of both end parts of first and second terminal bases into a U shape or a frame shape. CONSTITUTION:Post-attaching terminal bases 4-1 and 4-2 are respectively secured in both end parts of first and second terminal bases 2-2 and 2-3 provided on the lower surface of a bobbin from the directions indicated by arrows. As the example of a means for positioning and securing the bases 4-1 and 4-2, end part projections C are respectively made to fit in recessed parts provided on the sides of the bases 2-2 and 2-3. When both of the bases 4-1 and 4-2 are secured, the bases 2-2 and 2-3 and 4-1 and 4-2 are formed into a (square)-shaped form and when either of the bases 4-1 and 4-2 is secured, the bases 2-2 and 2-3 and either of the bases 4-1 and 4-2 are formed into a U-sahped form. Thereby, an increase 10 the number of leads and ease of the design of 1 a substrate pattern and an insulation design can be realized and at the same time, workability of winding and a wiring can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a transformer and a method of manufacturing the same, and more particularly, to a relatively small transformer used for electronic equipment such as a switching power supply and suitable for mounting on a printed wiring board, and a method of manufacturing the same. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as a transformer incorporated in an electronic device such as a power supply device, an EE iron core, an EI iron core, a coil formed by winding a resin bobbin, a terminal block provided on the bobbin, etc. Various structures and manufacturing methods have been proposed and put to practical use.

FIG. 1 is a perspective structural view of a conventional transformer, FIG. 2 is an oblique (2) perspective assembly view of the iron core and bobbin of FIG. 1, and FIG. 3 is a bottom structural view of FIG. 1-1,
1-2 is an iron core, 2 is a bobbin, 2-1 is a winding body portion of 2, 2
-2 is the first terminal block of 2, 2-3 is the second terminal block of 2,
Reference numeral 2-4 is a lead and 3 is a winding and an outer peripheral tape.

The bobbin 2 having the conventional structure has a first terminal block 2-
2 and the second terminal block 2-3 are arranged in parallel, and 2-2 and 2-
3 is provided with a winding body 2-1. The iron core 1-1 and the iron core 1-2 are inserted from both sides of the hole of the winding body 2-1 as shown in FIG. . In that case, the winding and the outer peripheral tape 3 to be applied to the winding body 2-1 are A and B in FIG.
Working from the side, i.e. the open end side of the terminal block, the coil is formed. In this way, usually, both ends of the first terminal block 2-2 and the second terminal block 2-3 are open ends because of the necessity of winding work from the A and B sides.

Therefore, the lead 2-4 is installed in the first and second locations.
Only the second terminal blocks 2-2 and 2-3 are provided, and leads 2-4
The number of installations is also limited, and for example, it is inconvenient for designing a transformer that requires a large number of output windings, and it is difficult to provide a board pattern on the A and B sides, which is disadvantageous in terms of insulation distance and board area. It causes problems such as

As a conventional means for solving the above-mentioned problems, an excess coil lead wire due to lack of lead of the terminal block is directly
It was soldered to the connection hole of the board to make electrical connection. However, with such means, it is usually a manpower operation, the workability is poor, the connection hole of the board must be large, unsoldered portions are easily generated, and correction man-hours are required. was there.

[0007]

The problems to be solved are the conventional structure such as insufficient lead of the terminal block, inconvenient design of the wiring pattern of the board, difficult insulation distance and poor workability. Is a drawback.

(3)

Means for Solving the Problems First and second leads having leads
Of the bobbin, the iron core, and the coil having at least the bobbin having the winding body portion arranged over the first and second terminal blocks, the first and second terminal blocks being arranged in parallel. Attaching a retrofit terminal block with a lead to one or both ends of the U-shape or U-shape.
Forming a frame-shaped body including a fixed portion and a post-installed terminal block along the first and second terminal blocks, and fixing the frame-shaped body,
Further, the method has a first step of winding the winding on the winding body of the bobbin, and a second step of fixing the post-installed terminal block or a frame-shaped body including the post-installed terminal block after the first step. It is a method of manufacturing the transformer.

[0009]

FIG. 4 is a perspective assembly view showing an embodiment of the present invention.
FIG. 5 is a bottom view of the structure after assembling, and the same reference numerals as those in the previous figures denote the same parts. 4-1 and 4-2 are the rear terminal blocks, and 4-3 is the rear terminal block 4-1 and 4-2.
Symbols C and C are end projections of the terminal blocks 4-1 and 4-2 to be attached later.

In the structure of the present invention, the post-installed terminal blocks 4-1 and 4-2 are fixed to both ends of the first terminal block 2-2 and the second terminal block 2-3 provided on the bobbin in the arrow direction. . As an example of the positioning and fixing means, the end projections C are fitted in the recesses provided on the 2-2 and 2-3 sides, and are formed as shown in the bottom view of FIG.

As described above, the winding body 2 is formed with both ends of the first terminal block 2-2 and the second terminal block 2-3 as open ends.
After performing the winding work etc. to -1, the post-installed terminal blocks 4-1 and 4
-2 is fixed to one or both of the both ends. That is, when both 4-1 and 4-2 are fixed as seen from the bottom surface,
As shown in FIG. 5, when any one of the square shape, 4-1 or 4-2 is fixed, it is formed in a U shape (not shown). In this way, the number of leads 4-3 provided on the terminal blocks 4-1 and 4-2 can be increased (4), and the above problems can be solved.

The winding body 2-1 of the bobbin 2, the first and second terminal blocks 2-2 and 2-3, and the retrofit terminal blocks 4-1 and 4-2 are usually made of phenol resin. However, in addition to the phenol resin, a thermoplastic resin such as PBT, PET, PPS is also used. Further, the leads 2-4 and 4-3 have copper-coated steel wires, copper pins and the like press-fitted into the holes provided in each terminal block.
The shape and number of each lead depends on the required specifications of the transformer.
You can choose.

The iron cores 1-1 and 1-2 used the EE iron cores, but if necessary, the EI iron cores may be used.
The shape of the iron core cross section is not limited to a quadrangle, and a circle, an ellipse, or the like can be selected. The winding body 2-1 of the iron cores 1-1 and 1-2
If it is inserted into the hole of the
Either before or after the fixing step of -1, 4-2 may be performed.

FIG. 6 is a perspective assembly view showing another embodiment of the present invention, and FIG. 7 is a bottom view of the assembled structure, and the same reference numerals as in the preceding figures denote the same parts. Reference numeral 5 is a fixing portion fixed along the first and second terminal blocks 2-2 and 2-3,
A frame-like body is formed together with the post-installed terminal blocks 4-1 and 4-2. Reference numeral 6 is a hole provided in the fixed portion 5.

In this embodiment, the post-installed terminal blocks 4-1 and 4-
The frame-shaped body formed by two and two sets of the fixing portions 5 is attached and fixed to the first and second terminal blocks 2-2 and 2-3 as shown by the arrow in FIG. With this configuration, the same effect as that of FIG. 4 is obtained.

In the embodiment shown in FIGS. 6 and 7, a frame-like body is formed in the fixed portion 5 so that the lead 2-4 can be inserted therethrough.
The fixing portion 5 formed along the first or second terminal block 2-2, 2-3 is, for example, a lead 2-4 of 2-2, 2-3.
It should be positioned more inside, and the hole or groove provided in the fixing part 5
-2, 2-3 may be fixed by a protrusion provided on (2)-(2)-(3), and a frame-shaped body may be selected which can be configured so that the lead 2-4 does not penetrate the fixing portion 5.

In the embodiments up to the previous figures, for example, as a concrete structure of the bobbin 2, a standoff protrusion, a winding coil introduction groove, etc. are provided for other purposes. It is omitted in the drawing. In addition, in the embodiments of the present invention, modifications of each part, addition of other parts, conversion of materials, and the like are included in the right of the present application within the scope of the gist of the present invention.

[0018]

As the number of leads is increased and the board pattern design and the insulation design are facilitated by the addition of the post-installed terminal block, the workability of the winding and wiring is good, and in particular,
Since a transformer structure and manufacturing method suitable for mounting on a printed wiring board can be obtained, it can be used for various electronic devices such as a switching power supply, and its industrial effect is great.

[Brief description of drawings]

FIG. 1 is a perspective structural view of a conventional transformer.

FIG. 2 is a perspective assembly view of a conventional iron core and bobbin.

FIG. 3 is a bottom view of a conventional transformer.

FIG. 4 is a perspective assembly view showing an embodiment of the present invention.

FIG. 5 is a bottom structural view of the embodiment of the present invention.

FIG. 6 is a perspective assembly view showing another embodiment of the present invention. (6)

FIG. 7 is a bottom structural view of another embodiment of the present invention.

[Explanation of symbols]

 1-1, 1-2 iron core 2 bobbin 2-12 winding body 2-22 first terminal block 2-32 second terminal block 2-4 lead 3 winding and outer circumference Tapes 4-1 and 4-2 Retrofit terminal block 4-3 Retrofit terminal block lead 5 Fixing part 6 Fixing part hole A, B Designated open end C End projection

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michael P. Archery North Sleep Springs Drive, West Lake Village, California, United States 2605

Claims (3)

[Claims] 1. A bobbin, an iron core, and a coil, in which first and second terminal blocks having a lead are arranged in parallel, and a bobbin having a winding body provided over the first and second terminal blocks is provided. In the transformer as a component, one or both end portions of the first and second terminal blocks are provided with a retrofit terminal block having a lead,
A transformer characterized by being fixed in a U-shape or a U-shape. 2. The transformer according to claim 1, wherein a frame-shaped body including a fixed portion and a rear-mounted terminal block along the first and second terminal blocks is formed, and the frame-shaped body is fixed. 3. A bobbin, wherein a winding is provided on a winding body of the bobbin.
3. The method of manufacturing a transformer according to claim 1 or 2, further comprising the step of (1) and the second step of fixing the post-installed terminal block or the frame-shaped body including the post-installed terminal block after the first step.