JPS61203609A - Transformer - Google Patents

Abstract

PURPOSE:To make positioning unnecessary in fitting, to simplify installations and to reduce imperfections by a construction wherein indented guide lead grooves for leading out coil terminals are provided on two sides of a case opposite to each other, and a base plate is provided on one of two sides perpendicular to said sides through the intermediary of a hinge-shaped connecting member, while a projection with which the base plate engages is provided on the other side. CONSTITUTION:A projection 6 for holding a base plate, which is used when the base plate 7 is fitted on a case 4, is provided in the lower end portion of the case 4. A connecting member 8 is bent when the base plate 7 is fitted on the case 4. The connecting member 8 can be designated to have any of shapes shown in figures (a)-(c) for facilitating the bending. It is so constructed that the base plate is connected with a lateral side portion 4a of the case by the connecting member 8 being shaped in a hinge and serving as a joint, and that the fitting and assembling of the case 4 and the base plate 7 are completed by bending the hinge-shaped portion of the connecting member 8 at an angle of 90 deg.. In addition, the connecting member 8 is fitted at a position higher at an arbitrary distance than the lower end portion 3b of the case so as to prevent the base plate 7 from jutting out of the lower end portion 4b of the case after assembling.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to transformers used in various audio equipment, video equipment, industrial equipment, and the like.

2. Description of the Related Art In a conventional transformer, a case 2 and a bottom plate 3 are used as separate molded products, as shown in FIG. It was fitted and assembled.

Problems to be Solved by the Invention However, this structure requires positioning during mating in order to mate the individual parts, which complicates the equipment and causes problems such as mating errors and forgetting to insert the bottom plate. Ta. Therefore, an object of the present invention is to eliminate the need for positioning during fitting, simplify the equipment, and reduce defects.

Means for Solving the Problems and Means of the present invention for solving the above problems is to provide a concave-shaped guide pull-out groove for extending the coil terminal on two opposite sides of the case, and to have a guide pull-out groove perpendicular to the above-mentioned sides. On one of the two sides,
A bottom plate is provided via a bow-shaped joint, and a protrusion with which the bottom plate engages is provided on the other side.

Function: The function of this means eliminates the need for positioning, whereas conventional positioning is required when fitting.

Also, unlike the fitting of individual parts, it is now a secondary process of an integrally molded product, which simplifies the assembly method.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a flow-type bobbin in which a plate-shaped or rod-shaped metal terminal is fixed to the side surface of the collar of a winding frame around which a coil is wound, and 1a is the terminal. , 4 is bobbin 1
The case 4 is provided with a plurality of concave guide grooves 6 for pulling out the terminals 12L. Reference numeral 6 denotes a bottom plate fixing protrusion used when the bottom plate 7 and the case 4 are fitted together, and this protrusion 6 is provided at the lower end of the case 4.

Next, the connecting portion 8 between the case 4 and the bottom plate 7 will be explained.

The connecting portion 8 is a portion that is bent when the case 4 and the bottom plate 7 are fitted together. In order to facilitate bending, the connecting portion 6 may have the shape shown in FIG. 3, 111+a. The structure is such that the bottom plate 7 is connected to the case side part 4IL through a hinge-shaped connecting part 8, and by bending the hinge-shaped part 9Q of the connecting part 8, the case 4
The fitting assembly of the bottom plate 7 is completed. Furthermore, the connecting portion 6 is attached at a position arbitrarily elevated from the case lower end 3b in order to prevent the bottom plate 7 from protruding from the case lower end 4b after assembly.

Next, a mold for molding the product of the present invention will be explained based on FIG. 4. First, Figure 4a shows the joint 8 between the case 4 and the bottom plate 7.
The mold structure is such that the plane part of the bottom plate 7 is parallel to the joint part 8, and this structure is a shape that allows the mold to be produced relatively easily. 9 is a male mold, and 1o is a female mold. However, with this method, the number of molded products produced by the mold is reduced. Therefore, a method for increasing the number of molds is shown in Fig. 4. The mold structure shown in Figure 4 is the joint part 8.
The plane part of the bottom plate 7 is perpendicular to the joint part 8 with reference to , and this structure makes it possible to increase the number of molds to be made.

Effects of the Invention In the present invention, since the case and the bottom plate are integrated using a rectangular shape, assembly work is simplified, and with the simplification of work, equipment is simplified and assembly work defects are reduced. It is.

Furthermore, in the case of a molding die, the number of mold surfaces is one, reducing mold costs and mold management costs, and as a result, parts costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a transformer according to an embodiment of the present invention before the bottom plate is assembled, Fig. 2 is a perspective view after the bottom plate is assembled, Fig. 3a,
b, C are enlarged sectional views of the case and bottom plate joint, Fig. 4a
, b is a sectional view showing a molding structure, and FIG. 5 is a perspective view showing a conventional transformer. 1...Bobbin, 1a/output...terminal, 4/old...
Case, 6... Guide groove, 6... Protrusion for fixing the bottom plate, γ, River... Bottom plate, 8... Connection part. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2! a- Figure 3 Figure 4

Claims (1)

[Claims] A concave-shaped guide pull-out groove for extending the coil terminal is provided on two opposite sides of the case made of a plastic molded product, and a bottom plate is attached to one of the two sides perpendicular to the above-mentioned side via a hinge-shaped joint. and a protrusion on the other side with which the bottom plate engages.