JPH1187153A - Transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly general use transformer, without the need for replacing a coil bobbin if a wire vol. difference exists between the input and output windings, as long as the output capacity is the same. SOLUTION: An insulation wall 10 is composed of a pair of insulation wall pieces 10a removably disposed in a barrel 1a of a coil bobbin 1, and the pieces 10a are mounted so as to hold the barrel 1a therebetween and have recesses 13 therefor. The barrel 1a has pin-like couplings 11a formed together for coupling the wall pieces 10a to its axial parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer for use in various types of consumer or industrial electronic equipment, and more particularly to a structure for insulating an input winding and an output winding wound on a coil bobbin. .

[0002]

2. Description of the Related Art FIG. 8 is a perspective view of a coil bobbin of a conventional transformer, and FIG. 9 is a structural view of the transformer. As shown in FIG. 8, a coil bobbin 1 made of a synthetic resin molded product has an insulating wall 2 integrally formed at a substantially central portion of a body 1a.

As shown in FIG. 9, an input winding 3 is provided on a body 1a between one flange 1b of a coil bobbin 1 and an insulating wall 2.
Is wound. Also, the other flange portion 1c of the coil bobbin 1
An output winding 4 is wound around the body 1 a between the insulating wall 2 and the insulating wall 2. Reference numeral 5 indicates a core. The insulation distance between the input winding 3 and the output winding 4 depends on the insulation wall 2 integrally formed with the coil bobbin 1.
Is secured.

[0004]

As described above, in a conventional coil bobbin of a transformer, an insulating wall for securing an insulating distance between an input winding and an output winding is formed integrally with the coil bobbin to change its position. It is not possible.

Therefore, even in a transformer having the same output capacity, if there is a difference in the wire volume between the input winding and the output winding, a new coil bobbin in which the position of the insulating wall is changed and used, or A coil bobbin adapted to a winding having a large electric wire volume will be used.

As described above, the prior art has a problem in that different coil bobbins are required even for transformers having the same output capacity due to the difference in wire volume between the input winding and the output winding of the transformer.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art.
An object of the present invention is to provide a highly versatile transformer that does not require replacement of a coil bobbin with the same output capacity.

[0008]

The object of the present invention is to provide an insulating wall provided on a coil bobbin along a body of the coil bobbin in order to provide an insulating distance between an input winding and an output winding wound on the coil bobbin. This is achieved by a first means that is displaceable.

In the first means, the insulating wall is constituted by a pair of insulating wall pieces which are mounted so as to sandwich the body of the coil bobbin and which can be separated from the body, while the body has the insulating wall. This is achieved by the second means in which the locking portions of the insulating wall pieces are provided at a plurality of positions in the axial direction.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals. FIG. 1 is a perspective view showing a coil bobbin of a transformer according to a first embodiment of the present invention and an insulating wall in a separated state, and FIG. 2 is a configuration diagram of the transformer according to the embodiment.

As shown in FIG. 1, the insulating wall 10 of the present embodiment is constituted by a pair of divided insulating wall pieces 10a, 10a detachable from the body 1a of the coil bobbin 1. The insulating wall pieces 10a, 10a are mounted on the body 1a so as to sandwich the body 1a.
have.

On the front and rear surfaces of the body portion 1a, pin-like portions for locking (holding) the insulating wall pieces 10a, 10a at a plurality of positions (three in this example) at predetermined intervals in the axial direction thereof. The locking portion 11 is integrally formed. On the other hand, the insulating wall piece 10
A locked portion 12 having a hole to be fitted with the locking portion 11 is provided in each of the portions a and 10a.

If there are three locking portions 11, the insulating wall pieces 10a, 10a are locked to the body 1a of the coil bobbin 1 at three arbitrary positions, and a pair of insulating wall pieces 10a, 10a
Is formed. That is, the insulating wall 10
Can be moved to three positions along the axial direction of the body 1a of the coil bobbin 1, and the position of the insulating wall 10 may be determined according to the wire volume difference between the input winding and the output winding. Further, even if the winding volumes of the input winding 3 and the output winding 4 are different, it can be easily handled by changing the position of the insulating wall 10.

FIG. 2 shows a case where the wire volume of the input winding 3 and the output winding 4 are different from each other.
Can be easily wound and assembled by attaching the coils to the positions corresponding to the electric wire volumes of the input winding 3 and the output winding 4.

FIG. 3 is a perspective view showing a coil bobbin of a transformer according to a second embodiment of the present invention and an insulating wall separated therefrom. In the case of this example, on the front and rear surfaces of the body 1a of the coil bobbin 1, a plurality of laterally long groove-shaped locking portions 11 are formed at predetermined positions in the axial direction at predetermined intervals, and the insulating wall pieces 10a, 1 are formed.
0a is a protruding piece-shaped locked portion 12 fitted with the locking portion 11.
Is provided. Also in the case of this example, the position of the locking portion 11 into which the locked portion 12 is inserted may be selected according to the wire volume difference between the input winding and the output winding.

FIG. 4 is a perspective view showing a coil bobbin of a transformer according to a third embodiment of the present invention and an insulating wall separated from the coil bobbin, and FIG. 5 is a view for explaining types of the insulating wall.

In the case of this example, the body 1a of the coil bobbin 1
A groove-shaped locking portion 11 extending in the axial direction is formed between the flange portions 1b and 1c on the front and rear surfaces of the insulating wall pieces 10a and 10c.
A is provided with a long piece-shaped locked portion 12 that fits with the locking portion 11. The width V of the long piece of the locked portion 12 is substantially the same as the width W of the locking portion 11, and the length X of the locked portion 12 is the length of the locking portion 11 as shown in FIG. The size of the insulating wall piece 10a is approximately the same as the length Y, and one type of insulating wall piece 10a is attached to a position closer to the upper side or lower side with respect to the locked portion 12 (X1 ≠ X2). The wall piece 10a 'is attached to a substantially central position with respect to the locked portion 12 (X1
= X2). Thus, the insulating wall piece 1 for the locked portion 12
Several types having different positions of 0a and 10a 'are prepared, and the insulating wall pieces 10a and 10a' can be selected according to the wire volume difference between the input winding and the output winding.

FIG. 6 is a perspective view showing a coil bobbin of a transformer according to a fourth embodiment of the present invention and an insulating wall separated from the coil bobbin, and FIG. 7 is a view for explaining types of the insulating wall.

The difference between this embodiment and the third embodiment is that the insulating wall pieces 10a, 10a extend horizontally from the upper end or the lower end of the elongated portion 12 to be locked. The shape is almost L-shaped, and several types of the locked portions 12 having different lengths such as Z and Z 'are prepared.
Insulation wall piece 10 according to the wire volume difference between the input winding and the output winding
a, 10a 'can be selected.

[0020]

As described above, according to the present invention,
Even if there is a difference in wire volume between the input winding and the output winding, transformers with the same output capacity can be easily handled with the same bobbin by changing the position of the insulating wall attached to the coil bobbin, which is excellent in versatility. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a coil bobbin of a transformer and an insulating wall in a separated state according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of the transformer.

FIG. 3 is a perspective view showing a coil bobbin of a transformer and an insulating wall in a separated state according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a coil bobbin of a transformer and an insulating wall in a separated state according to a third embodiment of the present invention.

FIG. 5 is a diagram for explaining types of insulating walls used for the transformer.

FIG. 6 is a perspective view showing a coil bobbin of a transformer and an insulating wall in a separated state according to a fourth embodiment of the present invention.

FIG. 7 is a diagram for explaining types of insulating walls used for the transformer.

FIG. 8 is a perspective view of a coil bobbin of a transformer according to a conventional example.

FIG. 9 is a configuration diagram of a transformer according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil bobbin 1a Body 3 Input winding 4 Output winding 5 Core 10 Insulating wall 10a Insulating wall piece 11 Locking part 12 Locked part 13 Concave part

Claims (2)

[Claims] 1. An insulating wall provided on a coil bobbin for providing an insulating distance between an input winding and an output winding wound on the coil bobbin, the insulating wall being displaceable along a body of the coil bobbin. Trance. 2. The insulating wall according to claim 1, wherein the insulating wall comprises a pair of insulating wall pieces which are attached so as to sandwich the body of the coil bobbin and are separable from the body. A transformer provided with locking portions for the insulating wall pieces at a plurality of locations in the axial direction of the portion.