JPH09148147A - Transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a transformer using a coil bobbin, which does not cause a short-circuit and is highly reliable, by a method wherein as the coil bobbin, a coil bobbin, wherein an upper lead-out groove formed in an upper projection is constituted of deep grooves and shallow grooves, which are alternately formed on the upper projection, is used. SOLUTION: In a coil bobbin, upper grooves 18 for core use are respectively formed in both ends of a cylindrical wound core 14 consisting of an electrically insulating material and a center hole 10 consisting of through holes, which penetrate the wound core 14, is formed in the wound core 14. Quadrilateral upper flanges 2 overhung outward are formed. Lower grooves to be mounted with a core are formed in the wound core 14 and upper and lower projections 20 and 21, which are parallel to a core installation direction, and a lower flange 3 having pin terminals 4, which are droopingly provided, are formed. Shallow grooves 16a and deep grooves 16b are alternately formed in the projection 20 and an upper projection A20a and an upper projection B20b are formed. The projection 21 has a lower lead-out groove 15. Thereby, a transformer using the coil bobbin, which does not cause a short-circuit and is highly reliable, can be obtained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to various video equipment,
The present invention relates to a transformer used in audio equipment, industrial equipment, telephone-related equipment, and the like, and particularly to a coil bobbin used in the transformer.

[0002]

2. Description of the Related Art A coil bobbin used in a conventional transformer is, as shown in FIG. 2 (b), an upper collar 2 having upper grooves 18 protruding outward at both ends of a cylindrical winding core 14 made of an electrically insulating material. And a lower collar 3 having a lower groove 19 are provided, the lower collar has a two-step upper protrusion 20 and a lower protrusion 21, and each has an upper drawing groove 16 and a lower drawing groove 15, The pin terminals 4 are planted in the pores on the bottom surface of the lower collar 3 along the opposing sides.

A conventional transformer is assembled as follows. As shown in FIG. 2 (c), a polyurethane enamel copper wire (UEW) is wound around the winding core of the coil bobbin as a primary winding, and an insulating tape is wound on it to insulate the primary winding. The U on the insulating tape
The EW is used to wind the secondary winding, and the end of the secondary winding is twisted to the pin terminal 4. Primary winding, insulating tape winding,
The secondary winding or the one wound with the insulating tape is dipped in the solder bath, and the barbed portion 11 is soldered.

Next, as shown in FIGS. 2A and 2B, the central magnetic leg of the E-shaped core 8 is attached to the center hole 10 of the winding core 14.
Through, and a pair of E-shaped cores 9 are abutted on the opposite side. After that, an insulating tape for fixing the core is wound around the surfaces of the cores 8 and 9, and the pair of cores are brought into close contact with each other to complete the assembly.

The mounting on the board is performed by inserting the pin terminals into the mounting holes of the board and soldering.

Conventionally, a coil bobbin used in this type of transformer has a pin terminal 4 of A as shown in FIG.
The wire 5a entangled in the lower flange 3 passes between the lower pullout grooves 15 of the lower collar 3, passes between the lower protrusions 21 and the upper protrusions 20, and passes between the upper protrusion grooves 16 of the upper protrusions 20. It is wound around the winding core 14.
The wire 5b entangled in the pin terminal 4 of B passes between the lower extraction groove 15 of the lower collar 3, passes between the lower protrusion 21 and the upper protrusion 20, and extends to the upper protrusion groove 16 of the upper protrusion 20. Pass through the space between the core 1
Wrapped in 4.

In the conventional transformer, a point where the winding start wire 5a and the winding end wire 5b intersect as shown by X occurs. For this reason, if the wires 5a and 5b intersect each other, a short circuit occurs, so that at the intersection, the wires 5a and 5b are insulated by applying the silicone rubber tube 6 or the polyester insulating tape 7.

[0008]

However, the workability is poor when a silicone rubber tube or a polyester insulating tape is applied. Further, even if a silicone rubber tube or a polyester insulating tape is applied, the insulation is insufficient, and yet there is a problem of causing a short circuit.

An object of the present invention is to prevent short circuit,
It is to provide a transformer using a coil bobbin with high reliability.

[0010]

According to the present invention, a tubular core made of an insulating material and two flanges formed at both ends of the core, one of the flanges being a groove for installing the core. And a central hole, and the other has two steps of upper and lower protrusions for pulling out the winding, an upper lead-out groove and a lower lead-out groove provided in each of them, and a pin terminal for connecting the winding. In a transformer in which a coil is wound on a coil bobbin having a core and a core is installed, a transformer having a coil bobbin constituted by alternately forming a deep groove and a shallow groove in the upper protruding groove is obtained.

According to the present invention, when two winding ends that intersect each other are passed through the deep groove and the shallow groove, the two winding ends do not intersect each other, so that workability is good and short-circuiting is achieved. No, you can get a reliable transformer.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings using embodiments.

FIG. 1 is a perspective view showing a transformer of the present invention and a coil bobbin used therein. 1A is a perspective view showing a transformer, FIG. 1B is a perspective view showing a coil bobbin, and FIG. 1C is a partially enlarged perspective view showing a partial cross section of the coil bobbin.

As shown in FIG. 1 (b), the coil bobbin used in the transformer of the present invention has an upper groove 18 for core at both ends of a cylindrical winding core 14 made of an electrically insulating material, and has the above-mentioned cylindrical winding. It has a central hole 10 made of a through hole that penetrates the core 14.
A quadrilateral upper flange 2 that projects outward, a lower groove 19 for mounting the core, and an upper ridge 20 and a lower ridge 21 parallel to the core installation direction, and a lower collar having a pin terminal 4 vertically extending. 3 and 3. The upper protrusion 20 has a shallow groove 16a and a deep groove 16b.
And are alternately formed to form an upper protrusion A20a and an upper protrusion B20b. The lower protrusion 21 has a lower lead groove 15.

By using the coil bobbin having such a structure,
The transformer of the present invention is assembled as follows. As shown in FIG. 1A, the UEW is wound around the winding core of the coil bobbin as a primary winding, and an insulating tape is wound on the UEW to insulate the primary winding. The UEW is used to wind a secondary winding on the insulating tape, and the end of the secondary winding is twisted to the pin terminal 4. The primary winding, the insulating tape winding, the secondary winding, and the insulating tape winding are dipped in a solder bath, and the tangled portion 11 [see FIG. 1 (c)].
To solder.

Next, the magnetic leg at the center of the E-shaped core 8 is passed through the central hole of the winding core, fitted in the upper groove of the upper flange 2, and the lower flange 2 on the opposite side.
A pair of E-shaped cores 9 are abutted against the lower groove 1 and mounted. Then, a core fixing tape is wrapped around the surfaces of the cores 8 and 9 to bring the pair of cores into close contact with each other, and the assembly is completed. The attachment to the board is performed by inserting the pin terminal 4 into the mounting hole of the board and soldering.

By the way, the winding start wire and winding end wire of the primary winding and the secondary winding are twisted around the pin terminals and wound around the winding core.

At this time, as shown in FIG. 1 (c), the wire 5a entangled in the A pin terminal 4 passes through the lower protrusion 21 of the lower flange 3 and the lower protrusion 21. And between the upper protrusion 20 and the deep groove 16b of the upper protrusion B20b,
It is wound on the core. When the wire 5a is wound around the winding core and twisted by the A pin terminal 4, the wire 5a passes through the same place. or,
The wire 5b entangled in the pin terminal 4 of B passes through the lower extraction groove 15 of the lower protrusion 21 of the lower collar 3, and this time the upper protrusion A20.
It passes through the shallow groove 16a of a and is wound on the winding core. When the wire 5b is wound around the winding core and twisted by the B pin terminal 4, the wire 5b passes through the same place.

As can be seen from FIG. 1 (c), the wires 5a and 5b do not intersect as in the conventional transformer.
The distance between the wire 5a and the wire 5b can be controlled by the depth of the groove. That is, the shallow groove 16a, the deep groove 16b, and the upper protrusion 2
By controlling the depth of the groove between 0 and the lower protrusion 21, it is possible to increase the distance between the lines and prevent a short circuit.

[0020]

As described above, it is possible to provide a transformer using a highly reliable coil bobbin, in which wires do not intersect with each other, a sufficient distance can be secured between wires, and there is no short circuit. In some cases, the insulating property can be secured without using a silicone rubber tube or polyester tape, and in this case, workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a transformer of the present invention and a coil bobbin used for the transformer. FIG. 1A is a perspective view showing a transformer. FIG. 1B is a perspective view showing a coil bobbin. FIG.
FIG. 3C is a partially enlarged perspective view showing a partial cross section of the coil bobbin.

FIG. 2 is a perspective view showing a conventional transformer and a coil bobbin used therein. FIG. 2A is a perspective view showing a transformer. FIG. 2B is a perspective view showing the coil bobbin. FIG.
FIG. 3C is a partially enlarged perspective view showing a partial cross section of the coil bobbin.

[Explanation of symbols]

 1 transformer 2 upper collar 3 lower collar 4 pin terminal 5 tape 5a (winding start) wire 5b (winding end) wire 6 silicone rubber tube 7 polyester insulating tape 8, 9 (E-shaped) core 10 center hole 11 jerking Part 14 (cylindrical) winding core 15 Lower extraction groove 16 Upper extraction groove 16a Shallow groove 16b Deep groove 18 Upper groove 19 Lower groove 20 Upper protrusion 20a (having shallow groove) Upper protrusion A 20b (having deep groove) Upper protrusion B 21 Lower protrusion

Claims (1)

[Claims] 1. A two-stage upper structure comprising a cylindrical core made of an insulating material and two flanges formed at both ends of the core, and one of the flanges provided with an extraction groove for drawing out a winding wire. In a transformer in which a winding is applied to a coil bobbin having a protrusion, a lower protrusion, and a pin terminal for connecting the winding, and a core is installed, the lead-out groove provided in the upper protrusion is alternately formed with a deep groove and a shallow groove. A transformer characterized by using the constructed coil bobbin.