JPH0742507U - Trance - Google Patents

Abstract

(57) [Abstract] [Purpose] In the transformer using the triple-layer insulated copper wire used in various electronic devices, the soldering part of the triple-layer insulated copper wire and the triple-layer insulated copper wire by the heat of soldering It is an object of the present invention to provide a transformer which satisfies the insulation distance between the deteriorated portion of the coating and the copper wire and is small in size and excellent in productivity. [Structure] A coil bobbin 1 having flanges 12a at both ends and a terminal plate 14 on the outside of at least one of the flanges 12a.
2 and a collar 1 having a terminal plate 14 of the coil bobbin 12
One side of 2a is an insulating plate 15, and the collar 1 of the coil bobbin
A lead wire guide groove 16 provided between the terminal 2 and the terminal plate 14 and a terminal 13 connected to the lead wire wound around the coil bobbin 12 are provided. The productivity is excellent by using the copper wire 17 and the copper wire 18 on the opposite terminal side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transformer used in various electronic devices.

[0002]

[Prior art]

 In recent years, transformers have been miniaturized with the use of triple-layer coated insulated copper wire as the weight of various electronic devices has been reduced. In order to comply with the safety standards of each country, it is necessary to secure the insulation distance between the primary side and the secondary side.

A conventional transformer will be described below. 6 and 8 are perspective views of a conventional transformer. 7 is a sectional view of FIG. 6, and FIG. 9 is a sectional view of FIG. 6 to 9, 1 is a magnetic core, 2 is a coil bobbin, 3 is a three-layer insulation-coated copper wire winding, 4 is a copper wire winding, 5 is a three-layer insulation-insulated copper wire lead wire, and 6 is copper. Reference numeral 7 is a lead wire, 7 is a terminal, 8 is a terminal plate portion, 9 is a soldering portion, and 10 is an insulating paper. In the configuration shown in FIG. 6, the coil bobbin 2 is provided with the winding 3 of the three-layer-coated insulated copper wire, the lead wire 5 of the three-layer-coated insulated copper wire is wound around the terminal 7, and the winding 4 of the copper wire is provided through the insulating paper 10. A magnetic core 1 is incorporated in a coil bobbin 2 in which a lead wire 6 of a copper wire is wound around a terminal 7. In the configuration shown in FIG. 8, the coil bobbin 2 is arranged in parallel to the board to be mounted via the terminal 7, and the coil bobbin 1 is provided with the winding 3 of the three-layer insulated copper wire. The lead wire 3 of the above-mentioned three-layer covered insulated copper wire is wound around the terminal 7, and the winding 4 of the copper wire is applied through the insulating paper 10 and the lead wire 6 of the copper wire is wound around the terminal 7 and the magnetic core 1 is attached to the coil bobbin 2. It is embedded.

The operation of the transformer configured as described above will be described below. First, as shown in FIGS. 6 and 8, one of the terminals 7 of the transformer is connected to the primary side, and the other terminal 7 is connected to the secondary side. It is assumed that the terminal 7 connected to the primary side is provided with the winding 3 of the three-layer covered insulated copper wire and the terminal connected to the secondary side is provided with the winding 4 of the copper wire. Since the three-layer-coated insulated copper wire has an insulating function, it is unnecessary to insulate the coil 3 of the three-layer coated insulated copper wire and the winding 4 of the copper wire provided on the coil bobbin 2. However, since the lead wire 5 of the three-layer covered insulated copper wire is wound around the terminal 7 and soldered, the three-layer covered insulated copper wire wound around the terminal 7 loses its insulating function. Further, in the lead wire 5 of the three-layer covered insulated copper wire near the soldered terminal 7, the coating of the three-layer covered insulated copper wire deteriorates due to the heat of soldering. Therefore, it is necessary to secure an insulation distance between the winding 6 of the copper wire, the soldering portion 10 of the three-layer coated insulated copper wire and the deteriorated portion of the coating of the lead wire 5 of the three-layer coated insulated copper wire. Therefore, as shown in FIGS. 6 and 8, the terminal plate portion 8 is formed in a rectangular shape to secure the insulation distance.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional configuration, the shape of the terminal plate portion becomes large, which is disadvantageous for downsizing. In addition, since the degree of deterioration of the coating of the lead wire of the three-layer coated insulated copper wire depends on the soldering conditions, it is necessary to manage the soldering conditions with high accuracy, which causes a problem of poor productivity. It was

[0006]

[Means for Solving the Problems]

 In order to achieve this object, the transformer of the present invention is provided with flanges at both ends, and at least one of the flanges has a coil bobbin having a terminal plate outside and one of the flanges having the terminal plate of the coil bobbin is an insulating plate. The lead wire guide groove provided between the flange of the coil bobbin and the terminal plate, and the side opposite to the side provided with the terminal connected to the lead wire wound on the coil bobbin are provided in the guide groove. The structure is such that it is wound half way around and connected to the terminals.

Further, the coil bobbin is arranged in parallel to the board to be mounted via a terminal, and has the terminal connected to the lead wire wound around the coil bobbin on the lower side and the lead wire guide groove from the upper side. It has a structure in which it is wound about half a turn around.

[0008]

[Action]

 With this configuration, the insulating plate can secure the insulation distance between the soldered portion of the three-layer coated insulated copper wire and the deteriorated portion of the lead wire and the winding portion of the copper wire. Also, since it is insulated from the winding part of the copper wire including the deteriorated part of the three-layer covered insulated copper wire by the insulating plate, it can be produced in the same manner as in the conventional soldering.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, and 5.

In the figure, 11 is a magnetic core, 12 is a coil bobbin, 12a is a collar, 13 is a terminal, 14 is a terminal plate, 15 is an insulating plate, 16 is a guide wire guide groove, 17 is a winding of three-layer coated insulated copper wire, Reference numeral 18 is a winding of copper wire, 19 is a lead wire of three-layer-covered insulated copper wire, 20 is a lead wire of copper wire, 21 is a soldering portion, and 22 is an insulating paper.

1, 2 and 3 have a collar 12a at both ends thereof, and a coil bobbin 12 having a terminal plate 14 on the outside of at least one of the collars 12a, and a collar having the terminal plate 14 of the coil bobbin 12. As shown in FIG. One side 12a is an insulating plate 15, a lead wire guide groove 16 provided between the collar bobbin 12a of the coil bobbin and the terminal plate 14, and a terminal 13 connected to a lead wire wound around the coil bobbin 12. The guide groove 16 is wound about a half round from the side opposite to the side provided with and is connected to the terminal 13.

4 and 5, the coil bobbin 12 is arranged in parallel to the board to be mounted via the terminal 13 and is connected to the lead wire wound around the coil bobbin 12. The terminal is provided on the lower side and is wound around the lead wire guide groove 16 from the upper side for about half a circumference.

The operation of the transformer configured as described above will be described below. First, according to the configurations shown in FIGS. 1, 2, and 3, the three-layer coated insulated copper wire 17 is used for the terminal on the insulating plate 15 side, and the copper wire 18 is used for the terminal side facing each other.

A three-layer covered insulated copper wire 17 is wound around a terminal on the side of the insulating plate 15, and the lead wire 19 is passed through the lead wire guide groove 16 and is wound about half way around, and the three-layer covered insulated copper wire is wound from the opposite terminal side. A wire 17 is provided, a lead wire 19 at the end of winding is drawn out from the opposite terminal side, passes through the lead wire guide groove 16 and makes a half turn, and is wound around the terminal 13 on the insulating plate 15 side. Next, the copper wire 18 is wound around the terminal 13 through the insulating paper 22, the coil wire 18 is wound around the coil bobbin 12, and the lead wire 20 at the end of winding is wound around the terminal 13. It is possible to secure an insulation distance between the deteriorated portion of the soldering portion 21 and the lead wire 19 of the three-layer coated insulated copper wire and the winding portion 18 of the copper wire.

In addition, according to the configurations shown in FIGS. 4 and 5, the three-layer coated insulated copper wire 17 is used for the terminal on the insulating plate 15 side, and the copper wire 18 is used for the terminal side opposite to each other.

A three-layer coated insulated copper wire 17 is wound around the terminal on the side of the insulating plate 15, and the lead wire 19 is passed through the lead wire guide groove 16 for about half a circumference. 17, the lead wire 19 at the end of winding is led out from the flange 12a on the upper side, passed through the lead wire guide groove 16 for about half a circumference, and wound around the terminal 13 on the insulating plate 15 side. Next, the copper wire 18 is wound around the terminal 13 via the insulating paper 22, the coil wire 18 is wound around the coil bobbin 12, and the lead wire 20 at the end of winding is wound around the terminal 13. It is possible to secure an insulation distance between the deteriorated portion of the soldering portion 21 and the lead wire 19 of the three-layer covered insulated copper wire and the winding portion 18 of the copper wire.

In this embodiment, the winding 17 of the three-layer coated insulated copper wire is provided and the winding 18 of the copper wire is provided through the insulating paper 22, but the insulating paper 22 may be deleted. Needless to say.

[0018]

As described above, in the transformer of the present invention, one of the flanges having the terminal plate of the coil bobbin is used as the insulating plate, and the lead wire guide groove provided between the flange of the coil bobbin and the terminal plate is provided. By providing the insulating layer, the insulation distance between the deteriorated portion of the terminal portion and the lead wire of the three-layer covered insulated copper wire and the winding portion of the copper wire can be secured by the insulating plate. In other words, since it is not necessary to secure an insulation distance at the terminal portion, the shape of the terminal plate portion can be made small, which is advantageous for downsizing. Also, since it is insulated from the winding part of the copper wire including the deteriorated part of the three-layer covered insulated copper wire by the insulating plate, it can be produced under the conventional conditions in soldering, so it is excellent in productivity and further downsizing and productivity It is possible to realize an excellent transformer.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a transformer showing a second embodiment of the present invention.

FIG. 3 is a sectional view of the transformer.

FIG. 4 is a perspective view of a transformer according to another embodiment of the present invention.

FIG. 5 is a sectional view of the same.

FIG. 6 is a perspective view of a conventional transformer.

FIG. 7 is a sectional view of the same.

FIG. 8 is a perspective view of a conventional transformer.

FIG. 9 is a sectional view of the same.

[Explanation of symbols]

 11 magnetic core 12 coil bobbin 12a collar 13 terminal 14 terminal plate 16 lead-out guide groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taiji Koji 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Tetsuya Minade 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A coil bobbin having a collar at both ends thereof and a terminal plate on the outside of at least one of the collars, and one of the collars having a terminal plate of the coil bobbin as an insulating plate, and the collar of the coil bobbin and the terminal plate. Between the lead wire guide groove provided between the lead wire and the side provided with the terminal connected to the lead wire wound around the coil bobbin, and wound around the guide groove for about half a turn to connect to the terminal. A transformer in which a magnetic core is incorporated in the coil bobbin. 2. The coil bobbin is arranged in parallel to a substrate to be mounted via a terminal, and has the terminal connected to a lead wire wound around the coil bobbin on a lower side and a lead wire guide from an upper side. The transformer according to claim 1, wherein the transformer is wound around the groove about halfway.