JP2591347Y2 - Trance - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer in which a magnetic core mounted on an electronic circuit is placed horizontally, and relates to a transformer configured to fix a coil bobbin, a magnetic core and a core holder.

[0002]

2. Description of the Related Art Conventionally, a transformer formed by incorporating a magnetic core of this type into a coil bobbin and incorporating a core holder is shown in an exploded perspective view in FIG. 3 and an external perspective view in FIG. Insert the magnetic core 2 into the magnetic core assembling hole 4 of the coil bobbin 4.
c was installed from both directions of the coil bobbin 4, and then the two magnetic cores were held from above by the core holder 5 provided with spring plates on all four sides. However, the core holder 5 and the coil bobbin 4 are not fixed, and thus the core 2 Between the coil bobbin and the coil bobbin 4 and the backlash occurs, and when the core holder for holding the magnetic core is held and lifted, the core and the core holder are not fixed to the coil bobbin and therefore move upward, so that they are mounted on the substrate. However, there is a disadvantage that the height of the core holder from the substrate mounting surface is not constant.

[0003]

SUMMARY OF THE INVENTION In order to eliminate these drawbacks, the present invention provides a mounting hole with a spring plate in which the upper surface of a core holder is cut out on three sides and a spring plate is mounted on one surface, and the spring is provided on the upper surface of a coil bobbin flange. By providing a projection with a claw having a claw to be locked through a mounting hole with a plate and fixing the core holder and the coil bobbin, the transformer is formed so as to integrally fix the core holder, the magnetic core, and the coil bobbin. .

[0004]

According to the present invention, a claw provided on the upper surface of both side flanges of a coil bobbin to protrude upward and engage with the core holder is provided on the upper surface of the both ends of the coil bobbin. When the coil bobbin, the magnetic core, and the core holder are assembled, the coil bobbin and the core holder are connected to the protrusion with the claw by providing a mounting hole with a spring plate in which the spring plate is mounted on the inner end surface by notching in three directions to engage with the protrusion. The transformer is configured to be locked by a mounting hole with a spring plate. Also, since the core holder is locked to the coil bobbin, the play of the magnetic core is stopped, and the height of the coil bobbin and the core holder is made constant.

That is, the present invention relates to a transformer in which a split-type magnetic core, a coil bobbin and a core holder having spring plates for fixing a magnetic core on four sides from the upper surface are combined and formed so that the magnetic core is placed horizontally, and the coil bobbin is provided on both end flanges. A transformer characterized in that a projection with a claw provided and a mounting hole with a spring plate provided on an upper surface of a core holder and engaged with the projection with a claw are combined and locked.

[0006]

The claws of the projections with claws mounted on the upper surfaces of the flanges at both ends of the coil bobbin are outwardly mounted. When the claws are inserted into the mounting holes with the spring plates of the core holder, they are locked on the upper surface of the core holder. Since it is made of a certain non-magnetic metal plate or resin plate, the spring plate of the mounting hole with the spring plate pushes the back of the projection with the claw, and the projection with the claw attached to the coil bobbin from the mounting hole with the spring plate of the core holder. Does not fall off.

The core holder held by the coil bobbin holds the magnetic core in the core holder, and the spring plate on the core holder 4 has a pair of surfaces in contact with the back surface of the magnetic core and another pair in contact with the coil bobbin. Because the projection with the claw of the coil bobbin and the mounting hole with the spring plate of the core holder are engaged, after assembling the coil bobbin, magnetic core, and core holder, the magnetic core, core holder, and coil bobbin are firmly assembled and rattling is completely prevented. You.

[0008]

FIG. 1 is an exploded perspective view of a transformer according to the present invention, and FIG. 2 is an external perspective view of a completed transformer according to the present invention. In FIGS. 1 and 2, a projection 1b with a claw facing outward is attached to an upper part of a flange 1a at both ends of a coil bobbin 1 according to the present invention so that a toe does not catch on a wire during winding. After winding a plurality of windings (not shown), the winding terminals are pulled out of the pin terminals 6 through the grooves on the lower surface of the coil bobbin, and then soldered. Two cores (EE cores in the figure) are assembled into the magnetic core assembling holes 1c of the coil bobbin 1, and the core holder 3 is assembled to the coil bobbin 1. The coil bobbin 1 is provided in the core holder 3 of the present invention.
A mounting hole 3a with a spring plate is provided on the upper surface of the core holder 3 to be engaged with the projection 1b with a claw mounted on the upper surface of the flange.
The mounting hole 3a with a spring plate has a spring plate 3d for pressing the back surface of the projection with a claw. After the projection 1b with a claw of the coil bobbin 1 is inserted, the projection 1b with a claw inserted into the mounting hole with a spring plate. Is formed by a spring plate 3d from the back surface opposite to the claw side, and has a structure that does not fall off by ordinary vibration.

In the transformer of the present invention, the magnetic core 2 is assembled into a coil bobbin 1 on which a winding (not shown) is applied, and a rear core holder 3 is assembled from above the coil bobbin 1 to the projection 1b with a claw of the core holder 1 and a spring plate of the core holder 3. Mounting hole 3a
And make the transformer of the present invention.

[0010]

[Effects of the Invention] In a transformer in which a horizontal type split magnetic core is incorporated into a coil bobbin and a core holder is assembled and formed, a projection with claws with claws facing outward is attached to the upper surface of both end flanges of the coil bobbin, and the magnetic core is fixed to four surfaces. A mounting hole with a spring plate is provided on the upper surface of a core holder having a spring plate for engaging with the protrusion with a claw, and the projection with a claw is fixedly engaged with the mounting hole with a spring plate when the coil bobbin, the magnetic core and the core holder are combined. With the transformer configured so that the coil bobbin, the magnetic core and the core holder can be combined and fixed together, there is no rattling in the horizontal type transformer, and the height between the coil bobbin and the upper surface of the core holder is kept constant. For example, there is an effect that the reliability at the time of component mounting of the transformer can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a transformer according to the present invention.

FIG. 2 is an external perspective view of the assembled transformer according to the present invention.

FIG. 3 is an exploded perspective view of a conventional transformer of this type.

FIG. 4 is a perspective view showing the appearance of a conventional transformer after the assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil bobbin 2 Magnetic core 3 Core holder 4 Coil bobbin 5 Core holder 6 Pin terminal 1a Flange 1b Claw projection 1c, 4c Magnetic core installation hole 3a Mounting hole with spring plate 3b, 3c Spring plate for fixing magnetic core 3d Spring plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A split type magnetic core, a coil bobbin, and 4
And a core holder having a magnetic core fixing spring plate on the four sides thereof, and a transformer having a magnetic core placed horizontally and assembled and formed, wherein a claw provided on the upper surface of both ends of a coil bobbin and the claw provided on an upper surface of the core holder are provided. A transformer characterized in that it is combined and locked with a mounting hole with a spring plate that engages with the projection.