JPH0679131U - Trance - Google Patents

Abstract

(57) [Summary] [Purpose] In a transformer in which a split-type magnetic core is installed horizontally on a coil bobbin, and a core holder with spring plates for fixing the magnetic core is installed on four surfaces from the top, there is no rattling after assembly, and a coil bobbin A highly reliable transformer in which the height from the mounting surface to the upper surface of the core holder is constant. [Structure] Protrusions 1b with claws are provided on the upper surfaces of the collars 1a at both ends of the coil bobbin 1, and the protrusions 1 with claws are provided on the upper surface of the core holder 1.
A spring plate mounting hole 3a that engages with b is provided, and the projection with the claw and the mounting hole with the spring plate are locked to lock and fix the coil bobbin, the magnetic core, and the core holder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transformer in which a magnetic core mounted in an electronic circuit is a horizontal type, and relates to a transformer configured to fix a coil bobbin, a magnetic core and a core holder.

[0002]

[Prior art]

 A transformer formed by incorporating a magnetic core of this type into a coil bobbin and incorporating a core holder into the coil bobbin is shown in FIG. 3 as an exploded perspective view and in FIG. 4 as an external perspective view of the finished product. The coil bobbin 4 was mounted in the magnetic core mounting holes 4c of No. 4 from both directions, and then the two cores were held from above by the core holders 5 provided with spring plates on the four sides, but the core holders 5 and the coil bobbins 4 were fixed. Therefore, the magnetic core 2 and the coil bobbin 4 are not fixed to each other, and when the core holder for fixing the magnetic core is held and lifted, the magnetic core and the core holder are not fixed to the coil bobbin. Since it moves in the direction, the height of the core holder from the board mounting surface when mounted on the board is not constant.

[0003]

[Problems to be solved by the device]

 In order to eliminate these drawbacks, the present invention provides a core holder with a spring plate mounting hole in which three sides are notched and a spring plate is mounted on one side, and the coil bobbin flange has an upper surface through which the spring plate mounting hole is engaged. A transformer having a claw-shaped protrusion having a claw and fixing the core holder and the coil bobbin to thereby integrally fix the core holder, the magnetic core, and the coil bobbin.

[0004]

[Means for Solving the Problems]

 The present invention is provided with claw-shaped projections that project upward and engage with the core holder on the upper surfaces of both side flanges of the coil bobbin, and three directions that engage with the claw-shaped projections provided on the upper surfaces of both ends of the coil bobbin on the upper surface of the core holder. Make a cutout to provide a spring plate mounting hole on the inner end face with a spring plate.When assembling the coil bobbin, magnetic core, and core holder, engage the coil bobbin and core holder with the claw projection and the spring plate mounting hole. The transformer is configured to stop. Further, since the core holder is locked to the coil bobbin, rattling of the magnetic core is stopped and the heights of the coil bobbin and the core holder are made constant.

That is, the present invention is a transformer in which a split type magnetic core, a coil bobbin, and a core holder having spring plates for fixing magnetic cores on four sides from the upper surface are combined and formed by incorporating the magnetic core in a horizontal position. The transformer is characterized in that a projection with a claw provided on the core holder and a mounting hole with a spring plate that engages with the projection with a claw provided on the upper surface of the core holder are combined and locked.

[0006]

[Action]

 The claws on the protrusions with claws attached to the upper surfaces of the flanges on both ends of the coil bobbin are installed outward, and when inserted into the spring holder attachment holes of the core holder, they engage with the top surface of the core holder, and the core holder has a spring-like property. Since it is made of a magnetic metal plate or resin plate, the spring plate in the mounting hole with the spring plate pushes the back surface of the projection with claws, It does not fall out.

The core holder held by the coil bobbin holds the magnetic core in the core holder, and the pair of spring plates on the four surfaces of the core holder are in contact with the back surface of the magnetic core and the other pair are in contact with the coil bobbin. On the other hand, since the protrusion with the claw of the coil bobbin and the mounting hole with the spring plate of the core holder engage, the core, core holder, and coil bobbin are firmly assembled after the coil bobbin, core, and core holder are assembled. To be prevented.

[0008]

【Example】

 1 is an exploded perspective view of a transformer according to the present invention, and FIG. 2 is an external perspective view of a finished product of the transformer according to the present invention. 1 and 2, the coil bobbin 1 according to the present invention is provided with a claw-like projection 1b on the upper end of the collar 1a at both ends thereof, the claw facing outward so that the tip of the coil does not catch on the wire during winding. After winding a plurality of windings (not shown) around the frame, the winding terminals are drawn out through the grooves on the lower surface of the coil bobbin to the pin terminals 6 and then soldered by tangling. Two magnetic cores (EE cores in the figure) are installed in the magnetic core installation holes 1c of the coil bobbin 1, and the core holder 3 is installed in the coil bobbin 1. The core holder 3 of the present invention is provided with an attachment hole 3a with a spring plate for engaging with a projection 1b with a claw attached to the upper surface of the collar bobbin 1 on the upper surface of the core holder 3, and the attachment hole 3a with a spring plate is provided in the attachment hole 3a. It has a spring plate 3d that pushes the back surface of the claw-like protrusion, and after inserting the claw-like protrusion 1b of the coil bobbin 1, the claw-like protrusion 1b inserted into the spring plate-attached mounting hole is on the opposite side to the claw-side. It is covered by the spring plate 3d from the back surface of the, and has a structure that does not fall off under normal vibration.

In the transformer of the present invention, the magnetic core 2 is incorporated into the coil bobbin 1 having a winding (not shown), the rear core holder 3 is incorporated from above the coil bobbin 1, and the protrusion 1b with the claw of the core holder 1 is provided with the spring of the core holder 3. The plate mounting hole 3a is locked to form the transformer of the present invention.

[0010]

[Effect of device]

 In a transformer in which a horizontal split type magnetic core is incorporated into a coil bobbin and a core holder is assembled, a protrusion with claws with the claws facing outward is attached to the upper surface of both flanges of the coil bobbin, and magnetic core fixing spring plates are attached to the four sides. A mounting hole with a spring plate that engages with the projection with a claw is provided on the upper surface of the core holder, and the projection with a claw is configured to be engaged and fixed in the mounting hole with the spring plate when the coil bobbin, the magnetic core, and the core holder are combined. By using a transformer, the coil bobbin, magnetic core, and core holder can be combined and fixed together, and rattling does not occur in a horizontal type transformer, and the height between the coil bobbin and the top surface of the core holder can be made constant. , It has the effect of improving the reliability when mounting transformer components.

[Brief description of 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 of the assembled external appearance of a conventional transformer of this type.

[Explanation of symbols]

 1 coil bobbin 2 magnetic core 3 core holder 4 coil bobbin 5 core holder 6 pin terminal 1a collar 1b claw protrusion 1c, 4c magnetic core installation hole 3a spring plate mounting hole 3b, 3c magnetic core fixing spring plate 3d spring plate

Claims (1)

[Scope of utility model registration request] 1. A split magnetic core, a coil bobbin, and 4 from the top.
In a transformer in which a core holder having spring plates for fixing magnetic cores on four sides is combined to form a magnetic core in a horizontal position, a projection with claws provided on the upper surfaces of both ends of the coil bobbin and a claw provided on the 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 a protrusion.