JPH02237005A - Transformer mounting device - Google Patents

Abstract

PURPOSE:To obtain an excellent transformer at low cost without requiring much labor by a method wherein the transformer is firmly fixed and generation of a defective article is prevented even when the transformer is dropped or vibration is generated by providing a spacer between the core and a printed wiring substrate of the transformer. CONSTITUTION:A printed wiring substrate 14 is placed on a supporting member 15, and the core 13 of a transformer is fixed to the supporting member 15 and a chassis 19 by screws 12 through the intermediary of spacers 18. By providing the spacers 18 in such a manner that they are buried in the space located between the core 13 of the transformer and the printed wiring substrate 14, the transformer can be fixed firmly, the rate of generation of rejects can be lowered without adding excessive force to the terminal and the printed wiring substrate of the transformer. Also, there is no connection of a lead wire, the number of manhours can be reduced, it is unnecessary to give special strength to the chassis, the frame of the transformer is unnecessary, and also manhours and cost of components can be cut down by fixing with a screw from the four corners to the diagonal line.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a transformer mounting device.

BACKGROUND OF THE INVENTION In recent years, as the capacity of transformers has increased, their weight has increased, and on the other hand, the containers that house transformers have become smaller as electrical equipment has become lighter, thinner, and shorter.

A conventional transformer will be explained below.

2, 3, 4, and 5 show examples of conventional transformer mounting devices. In FIGS. 2 to 6, 21, 31, 41 . 51 is a bobbin around which windings are wound, 22, 33, 43, 52 is a core of a transformer; 23
, 36. 56 is a board for mounting the transformer, 24, 3
7, 45, 57 are transformer terminals, 25.38.58
26, 34, 44, 55 are chassis for housing the transformer and the board; 32, 42, 54 are screws for fixing the transformer; 35. 46 is a lead wire, and 53 is a frame for fixing the transformer.

A method for fixing the transformer configured as above will be described below.

First, in the configuration shown in FIG. 2, the transformer is fixed to the board 23 only by soldering 25 the terminals 24 of the transformer. Next, in the configuration shown in FIGS. 3 and 4, the transformer core 33. 43 directly to chassis 34, 44
It is fixed with screws 32 and 42. Finally, in the configuration shown in FIG. 6, a frame 63 attached around the coil 752 of the transformer is fixed to the chassis 55 with screws 64 to fix the transformer.

Problems to be Solved by the Invention However, in the conventional configuration shown in FIG. solder between 26
There is a risk that the material may peel off and cause defects in the transformer or board.

In addition, in the conventional configuration shown in FIG. 3, a part of the transformer is exposed outside the chassis 34, which poses quality problems, and also does not increase the strength of the chassis 34. There is a risk that the chassis 34 may be deformed when dropped or vibrated. Furthermore, since it is structurally difficult to use only one board, it is not possible to use several boards to configure one device, which increases the cost of parts. In the conventional configuration shown in FIG. 4, it is necessary to compensate for the strength of the chassis 44 as in FIG. 3, and in order to connect the lead wires 46 to the terminals 46 of the transformer, the manufacturing process It's time consuming. productivity will deteriorate.

Finally, in the conventional structure shown in FIG. 5, a frame 53 is required for fixing the transformer, which increases the cost of members for fixing the frame and also the installation work.

In addition, the terminal 5 attached to the board 5e when dropped or vibrated.
Impact force is applied to the soldered part 7, which may cause defects in the transformer or board. As described above, these conventional mounting methods have the problems of occurrence of defects, increased costs, and increased man-hours.

In view of the above problems, the present invention aims to provide a transformer that can reduce defects, costs, and man-hours.

Means for Solving the Problems In order to solve the above problems, the transformer of the present invention has a structure including a spacer that supports the space between the printed wiring board and the core of the transformer.

Operation With the above configuration, the transformer can be firmly and easily fixed by attaching the transformer directly to the printed wiring board and fastening the four corners of the core of the transformer with screws via the spacers.

Embodiment Hereinafter, an embodiment of the transformer of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing the configuration of a transformer in one embodiment of the present invention.

In FIG. 1, 11 is a bobbin, 12 is a screw, 13 is a transformer core, 14 is a printed wiring board, 16 is a screw receiver and a support member for the printed wiring board, 16 is a terminal of the transformer, and 17 is a terminal 16. The solder to be attached, 18 is a spacer which is a feature of the present invention and supports the space between the core 13 of the transformer and the printed wiring board 14, and 19 is a chassis in which the transformer and the printed wiring board 14 are housed.

The operation of the transformer configured as described above will be explained below.

First, the printed wiring board 14 is placed on the support member 16, and the transformer 713 is fixed to the support member 16 and the chassis 19 with the screws 12 via the spacer 18.

As described above, according to this embodiment, by providing the spacer 18 to fill the space between the core 13 of the transformer and the printed wiring board 14, the transformer can be firmly fixed, and the transformer can be firmly fixed. There is no need to apply extra force to the terminals or printed wiring boards, and the incidence of defects can be significantly reduced. In addition, there is no need to connect lead wires, reducing man-hours, there is no need to make the chassis particularly strong, there is no need for a transformer frame, and the number of shears can be reduced by fixing screws diagonally from the four corners. Parts costs can be reduced.

In the embodiment, 18 spacers and 11 bobbins may be integrated. Furthermore, in order to make the bobbin more versatile, the bobbin 11 and the spacer 18 may be built-in type that can be easily attached and detached.

Effects of the Invention As described above, the present invention provides a smoother between the core of the transformer and the printed wiring board, thereby making it possible to firmly fix the transformer and preventing defects from occurring even when dropped or vibrated. Therefore, it is possible to realize an excellent transformer that is inexpensive and requires no effort.

[Brief explanation of drawings]

FIG. 1 is a side view of a transformer mounting device according to an embodiment of the present invention, and FIGS. 2, 3, 4, and 6 are side views of conventional transformer mounting devices. 11...Bobbin, 13...Core, 14
...Printed wiring board, 18...Spacer.

Claims (1)

[Claims] A transformer mounting device configured to mount a transformer having a bobbin around which a winding is wound and a core so as to support the core with a spacer interposed between the printed wiring board and the core.