JPH082982Y2 - Power transformer connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a power transformer connecting device, and more particularly to a power transformer connecting device in which a flange of a transformer bobbin is extended to provide a connection portion. Is.

[Prior Art] A conventional power transformer of this type is shown in attached FIGS. 6 and 7. This figure shows a power transformer (1) used for an AC adapter of an electronic device. A transformer bobbin (3) is inserted into the center of a core (2), and a primary coil is attached to the transbobbin (3). The coil (4) and the secondary coil (5) are wound. The lead wire of the primary coil (4) is the plug (6)
Soldered to the base of (6), the lead wires (7) and (7) of the secondary coil (5) are drawn to the flange (8) above the trans bobbin (3). Then, the leading ends of the lead wires (7) and (7) protruding to the upper part of the flange (8) and the leading ends of the coated conductive wires (9) and (9) peeled off and exposed are twisted and connected by soldering. I am doing it.

[Problems to be Solved by the Invention] In the above-described conventional power transformer (1), since the covered conductors (9) and (9) are not fixed, the connection portion swings and protrudes above the flange (8). Leader line (7)
Workability of soldering to (7) was not good. or,
Even after soldering, if an external force such as vibration is applied to the coated conductors (9) and (9), there is a risk that the wire connection part may be pulled and come off.

Therefore, there arises a technical problem to be solved for facilitating the wire connection work between the lead wire of the coil and the covered conductor wire and for sure connection, and the present invention aims to solve this problem. It is a thing.

[Means for Solving the Problems] The present invention has been proposed in order to achieve the above object, and a groove for sandwiching a lead wire of a coil is provided in a flange of a trans bobbin, and the groove of the coil is provided in the groove. In the trans bobbin formed so as to sandwich the lead wire, the groove is provided on both side edge portions of the connection portion formed by extending the flange outward, and further, inside the groove, Further, a groove for sandwiching the coated conductive wire is provided adjacent to the groove, and the respective leading end portions of the lead wire of the coil and the coated conductive wire are sandwiched in correspondence with the respective grooves, and further, both of the sandwiched A connecting device for a power transformer, characterized in that the tip portion of the wire is twisted and connected at the upper part of the wire connection portion, and the wire connection portion is soldered. Is to be provided.

[Operation] In this invention, the flange on one side of the trans bobbin is extended to the outside of the other flange to provide a connection portion. The lead wire of the coil wound around the trans bobbin is inserted into a groove opened at both side edge portions of the connection portion so as to protrude from the inner surface to the outer surface. Therefore, the leader line is naturally clamped in the groove and temporarily fixed. In addition, in the other groove provided adjacent to the inner side portion of the groove, the tip end portion of the coated conductive wire exposed by peeling is inserted into the groove so as to project from the inner surface to the outer surface. Therefore, since the coated conductor is clamped at a position apart from the surface of the coil, the work of clamping the coated conductor becomes easy. Furthermore, since the lead wire and the covered conductor wire are sandwiched in the respective corresponding grooves and are projected above the connecting portion, both wires are twisted and connected at the upper portion of the connecting portion,
Therefore, the wiring work becomes easy. When soldering to the connection portion, the lead wire and the covered conductive wire are temporarily fixed by the groove, so that the workability of soldering is improved. Further, since both wires are inserted into the groove even after soldering, there is no fear that the wire connection part will come off even when an external force such as vibration is applied.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 of the attached drawings. Each figure shows the power transformer (10) used for the AC adapter of electronic equipment,
A trans bobbin (12) is fitted in the center of the core (11). A flange (13) and a flange (14) are provided above and below the trans bobbin (12), respectively, and an intermediate flange (15) is provided at an intermediate position. The flange (1
3) One side surface is extended to the outside to provide a connection part (16), and the plug (17) (1
Fit the base of 7). A plurality of grooves (18), (18), (19) and (19) are opened in the connection portion (16). The widths of these grooves (18) (19) are opened corresponding to the wire diameters of the lead wire and the covered conductor wire of the coil described later, and the grooves (18) (18) are formed in the connection portion (16). Grooves (19) provided near both edges
(19) is provided close to the inside of the grooves (18) and (18). Then, the grooves (18) (18) are connected to the coil lead wires (2
2) It is used for sandwiching (22), and the grooves (19) (19) are used for sandwiching the coated conductors (23) (23). It is possible to bend and open.

The trans bobbin (12) is vertically divided by an intermediate flange (15). If the plug (17) side in the drawing is the lower stage, the primary coil (20) is wound around the lower stage and the upper stage is Two
The next coil (21) is wound. The lead wires of the primary coil (20) are soldered to the bases of the plugs (17) (17), and the lead wires (22) (22) of the secondary coil (21) are connected to the connecting portion (16).
It is inserted in the groove (18) (18). On the other hand, the coated lead wires (23) (23) for taking out to the outside are inserted in the grooves (19) (19) with the insulating coating peeled off to expose the lead wires. Thus, the lead wires (22) (22) and the covered conductor wires (23) (23) are temporarily fixed to the wire connection portion (16), and the lead wires (22) (projected above the wire connection portion (16) ( 22) and the coated conductors (23) and (23) are twisted and connected at their tips. After that, the connecting portion is subjected to a soldering treatment, and the lead wires (22) (22) of the coil of the power transformer (10) and the covered lead wire (23) for external extraction are applied.
(23) and are connected.

Thus, as can be described in the present embodiment, the connection portion (16) is provided by laterally extending the flange (13), and the groove (18) opened in the connection portion (16). ) (18), (1
By inserting the lead wires (22) and (22) of the coil and the covered conductor wires (23) and (23) into (9) and (19), the tips of both of them are positioned, and the wiring work is facilitated. Also, the groove (18)
Since the lead wire (22) and the coated conductor wire (23) are temporarily fixed at (19), the wire connection part does not come off when the product is moved, and the workability of soldering becomes good. Further, since the soldering work is performed on the upper surface side of the flange (13), the solder does not flow out to the winding side of the secondary coil (21), and the solder ball removal work is facilitated.

FIG. 5 shows another embodiment, in which a step portion (24) is provided for extending the flange (13) to the outside, and a connecting portion (16) is provided on the flange (13). It is provided in a position that extends slightly upward from the top surface. Therefore, the secondary coil (21)
When winding the wire, the wire connection portion (16) does not interfere with the winding work, and the work can be performed smoothly. still,
In the above description, the flange (13) is extended to the outside to provide the stepped portion (24), but instead of the flange (13), the flange (14) may be extended to provide the stepped portion, Alternatively, both flanges (13) (14) may be extended outward to form a stepped portion.

[Advantages of the Invention] As described in detail in the above-mentioned one embodiment, the invention is such that a groove for holding a lead wire of a coil is opened at both side edges of a connecting portion formed by extending a flange, and A groove for sandwiching the covered conductor is opened near the inside of the groove. Therefore,
The lead wire can be clamped in the groove for holding the lead wire of the coil from the inner surface of the connecting portion toward the outer surface without difficulty, and can be temporarily fixed. Further, the coated conductor wire is also hindered on the surface of the coil. Instead, the wire can be clamped in the groove for holding the covered conductor wire from the inner surface toward the outer surface of the wire connection portion and can be temporarily fixed. Thus, when the tip ends of both wires protruding above the wire connection portion are connected by twisting each other at the top of the wire connection portion, since both wires are close to each other, the wire connection work is performed. Becomes extremely easy. Further, since the connection portion is prevented from swinging and the soldering work is performed on the connection portion, the workability of the soldering becomes extremely good. Thus, according to the present invention, the work of connecting the lead wire of the coil and the covered conductor wire can be performed easily and quickly.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
1 is a front view of the power transformer, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. 4 is a perspective view thereof. FIG. 5 is a side view of a power transformer showing another embodiment, FIG. 6 is a front view of a power transformer showing a conventional example, and FIG. 7 is a perspective view of the same. (10) …… Power transformer, (12) …… Transformer bobbin (13) (14) …… Flange, (16) …… Connection part (18) (19) …… Groove, (20) …… Primary coil (21) …… Secondary coil, (22) …… Leader wire (23) …… Coated conductor, (24) …… Stepped section

Claims (1)

[Scope of utility model registration request] 1. A transformer bobbin wherein a flange for holding a lead wire of a coil is provided in a flange of a transbobbin, and the lead wire of the coil is held in the groove so that the groove extends outward from the flange. Grooves are provided on both side edges of the extended connecting portion, and further inside the groove and adjacent to the groove, there are provided grooves for sandwiching the covered conductive wire. Correspondingly, the respective leading end portions of the lead wire and the covered conductor wire of the coil are sandwiched, and further, both of the sandwiched leading end portions are twisted and connected at the upper part of the connection portion, and the connection portion is soldered. A power transformer connecting device characterized in that