JPH0641118U - Trance - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a transformer having a lead wire temporary fixing function so that the tip of the lead wire does not come into contact with high temperature solder during flow soldering. [Structure] A part of the high-voltage part is covered with an outer case, lead wires are led out from the outer case, and mounted on a printed circuit board via pin terminals, and the pattern of the pin terminals and the printed circuit board is soldered by flow soldering. The structure of the transformer, which is electrically connected to the outer case, is provided with a member for temporarily fixing the lead wire to the outer case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transformer in which a lead wire for extracting a high voltage is led out, and particularly, a transformer having a function of temporarily fixing the lead wire so as to prevent damage to the lead wire during flow soldering. Regarding

[0002]

[Prior art]

 In a conventional transformer 1 for a high-voltage power supply device, for example, as shown in FIG. 5, high-voltage parts such as a coil 3 formed by winding a bobbin 2 and a rectifying circuit section 4 are provided in an outer case 5. The core 6 is housed, a part of the core 6 is inserted into the cavity of the bobbin 2, the resin 7 for insulation is injected and cured in the outer case 5, the lead wire 8 is led out from the outer case 5, and the input of the coil 3 is input. A pin terminal 9 for connecting an end, a lead wire, etc. is made to project from the outer case 5. The high voltage transformer 1 is mounted on the printed circuit board 10 via the pin terminals 9 and soldered by flow soldering so that the pattern of the printed circuit board 10 and the pin terminals 9 are electrically connected, as shown in FIG.

[0003]

[Problems to be solved by the device]

 In the conventional transformer 1, the tip of the lead wire 8 or the connector provided at the tip of the transformer 1 may be touched and damaged by the high temperature solder 11 during the flow soldering. It was If soldering by flow soldering is required, it is necessary to fix the lead wire 8 to somewhere on the printed circuit board 10 using a specially prepared jig, which is troublesome.

The present invention has been made in view of the problems of the above-described conventional transformer, and in the case of flow soldering, a temporary lead wire that prevents the tip of the lead wire from coming into contact with high temperature solder. The purpose is to provide a transformer with a stop function.

[0005]

[Means for Solving the Problems]

 In the transformer according to the present invention, a part of the high voltage part is covered with an outer case, the lead wire is led out from the outer case, and the lead wire is mounted on the printed circuit board through the pin terminals. In the transformer which is electrically connected by being soldered by flow soldering, the outer case is provided with a member for temporarily fixing the lead wire.

[0006]

[Action]

 Since the transformer according to the present invention is configured by providing the outer case with the member for temporarily fixing the lead wire, when the transformer is mounted on the printed circuit board, it can be stopped by the member for temporarily fixing the lead wire. Therefore, when soldering with flow solder to electrically connect the terminals of the transformer and the pattern of the printed circuit board, the ends of the lead wires can be prevented from contacting the flow solder and damage can be prevented. . In addition, the outer case can be made of resin, and the temporary fixing member can be integrally formed with the outer case. As a result, since no special jig is used, the temporary fixing work can be simplified.

[0007]

【Example】

 An embodiment of a transformer according to the present invention will be described below with reference to the drawings. 1 and 2 are views for explaining a first embodiment of a transformer according to the present invention, in which parts corresponding to those shown in FIGS. 5 and 6 are designated by the same reference numerals. In the figure, reference numeral 12 denotes a transformer, and as shown in FIG. 1, a member 13 for temporarily fixing the lead wire 8 is provided integrally with the outer case 5 on the side where the lead wire 8 is not led out of the outer case 5. Is configured. Similar to the high voltage transformer 1 shown in FIG. 5, this transformer 12 has at least a part of a high voltage portion such as a coil 3 formed by winding a winding around a bobbin 2 and a rectifying circuit portion 4 in an outer case 5. Then, a part of the core 6 is inserted into the cavity of the bobbin 2 and a resin 7 for insulation is injected and cured in the outer case 5. Further, a lead wire 8 for taking out a high voltage is connected to the high voltage end of the coil and led out from the outer case 5, and a pin terminal 9 to which the input end of the coil 5 and a lead wire are connected is projected from the outer case 5. ing.

As shown in FIG. 2, the temporary fixing member 13 is formed in an arc shape with a notch 14 provided in a part thereof, and is connected to the outer case 5 by a part of the arc. The ends of the arc are meandered and expanded outward, and the arc ends 13a, 13a are elastically deformed so that the notch 14 is expanded. When the lead wire 8 is pressed against the notch 14, it spreads out, and the lead wire 8 is fitted in the arc portion so that it is not easily displaced. According to the present embodiment, the member 13 for temporarily fixing the lead wire 8 is provided integrally with the outer case 5, and the end portion of the lead wire 8 is temporarily fixed to this member 13. Therefore, as shown in FIG. When the terminals of the transformer 12 and the pattern of the printed circuit board 10 are electrically connected by soldering with flow solder, the ends of the lead wires 8 can be prevented from coming into contact with the solder, and the lead wires 8 and the connector are damaged. Can be prevented. Moreover, since no special jig is used for temporarily fixing the lead wire, the temporary fixing work becomes easy.

It should be noted that the present invention is not limited to the transformer of the above-described embodiment, and may be another type of transformer in which output (high voltage) is taken out by a lead wire and flow soldering is used. Further, the shape of the member for temporarily fixing the lead wire is not limited to the above embodiment, and for example, as shown in FIG. 3, the member 15 may be formed into a corrugated shape and one end thereof may be connected to the outer case 5. Good. Other than that, the transformer of the present invention is not limited to the above-mentioned embodiment, and the point is that it can be variously applied to those in which a member for temporarily fixing the lead wire is provided in the outer case.

[0010]

[Effect of device]

 According to the transformer of the present invention, the outer case is provided with a member for temporarily fixing the lead wire, so that the end of the lead wire does not come into contact with the flow solder even when soldering by flow soldering. Yes, you can prevent damage. Further, since no special jig is used for temporarily fixing the lead wire, the work for temporarily fixing the lead wire is also easy, and the workability is remarkably improved.

[Brief description of drawings]

FIG. 1 is a front view showing a transformer according to the present invention.

2A and 2B are diagrams showing a member for temporarily fixing the lead wire of the transformer, in which FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is a plan view illustrating another embodiment of a member for temporarily fixing lead wires.

FIG. 4 is a perspective view illustrating a state in which the transformer is soldered by flow soldering.

FIG. 5 is a partial cross-sectional view illustrating a transformer.

FIG. 6 is a front view illustrating a state in which a conventional transformer is soldered by flow soldering.

[Explanation of symbols]

 2: Bobbin 3: Coil 5: Outer case 8: Lead wire 10: Printed circuit board 12: Transformer 13, 15: Member for temporarily fixing lead wire

Claims (1)

[Scope of utility model registration request] 1. A part of the high voltage part is covered with an outer case, lead wires are led out from the outer case and mounted on a printed circuit board via pin terminals, and the pattern of the pin terminals and the printed circuit board is formed by flow soldering. A transformer, which is soldered and electrically connected, wherein a member for temporarily fixing lead wires is provided in the outer case.