JPH0650972Y2 - Composite core holder - Google Patents

Description

[Detailed Description of Device] a. The present invention relates to a structure of a core holder suitable for a coil in which a winding frame having flanges at both ends of a cylindrical winding core and a UU-shaped core are combined.

[Prior Art] Conventionally, a choke coil for a noise filter using a UU type core is provided with square flanges on both the left and right ends of a rectangular tubular core and the outer periphery of the central portion, and pin terminals are provided on the lower end faces of the both end flanges. Make the required windings on the vertically extending reel, insert two U-shaped cores so that their bases are vertical, and insert the lower magnetic legs into the center hole of the reel from both sides and butt them together. In this structure, a metal (for example, stainless steel) ring-shaped core holder is attached so as to cover the outer surface (upper surface) of the upper magnetic leg.

[Problems to be solved by the device]

Wafer-shaped metal core holders have the drawback that the holding claws on both ends are slippery on the surface of the core and the installation is unstable,
There is a drawback that it is difficult to mark the product code.

The coil with the above-mentioned structure is designed to secure a predetermined separation distance (for example, 1.6 mm or more) for insulation between the winding and the magnetic leg above the core without increasing the outer size of the collar, and The inner surface of the leg is slightly separated from the upper end surface of the tsuba. However, there is a drawback that when the winding is disturbed, a predetermined distance between the winding and the core cannot be secured.

B. Configuration of the Invention [Means for Solving the Problems] The present invention aims to provide a composite core holder in which the above-mentioned drawbacks are eliminated all at once.

According to the present invention, the ring-shaped core holder and the insulating plate for the inner surface of the winding / core magnetic leg are arranged so as to face the inner surface of the core holder, and one side edge is connected to each other by the connecting plate. It is characterized by being integrally molded with an insulating resin material.

[Action]

The insulating plate secures a predetermined creepage distance between the winding and the core and suppresses the displacement of the core holder, and the holding claw of the core holder is in close contact with the core to maintain a stable butted state of the core.

〔Example〕

FIG. 1 is an external perspective view of an embodiment of the present invention, and FIG. 2 is an external perspective view of a coil to which this composite core holder is attached.

In FIG. 1, a composite core holder 1 is integrally made of a flexible insulating resin material, and comprises a core holder 2, an insulating plate 3 and a connecting plate 4.

The core holder 2 has the same structure as a conventional metal core holder, and extends downward at both ends of a rectangular plate having substantially the same width dimension as the width dimension W of the U-shaped core 5 shown in FIG. A holding claw 21 that is tilted inward is provided on the.

In FIG. 2, the insulating plate 3 has a length dimension approximately twice the inner length of the magnetic leg of the core 5 (a spacing dimension between the inner surfaces of the bases of the butted cores 5) and a width dimension of the core. Width W of 5
It is slightly larger.

The connecting plate 4 has the same length as the insulating plate 3 and is spaced apart by the thickness T of the magnetic leg of the core 5, and the inner surface of the core holder 2 (holding claw 21
Insulating plate 3 that is disposed so as to face the (side surface on which there is) is connected to core holder 2 at the side edge on the same side (the back side in the drawing).

On the insulating plate 3, near the free edge thereof, the core holder 2
To the connecting plate 4 side at two locations slightly outside the position corresponding to the side edge (front side in the figure) of the winding frame 6 and substantially at the center between the end flange 61 and the center flange 62 of the bobbin 6. Hooking claws 31 that are curved in a circular arc shape are provided to project.

Since it is the composite core holder 1 having such a structure,
As shown in the figure, in the coil with the winding 7 combined with the core 5, the free end of the insulating plate 3 is attached to the inside of the magnetic leg of the core 5 from the side of the core 5 (from the back to the front in the figure). It can be inserted into the gap between the upper end surface of the flange 61 and the end flange 62, and at the same time, the holding claw 21 can be elastically contacted with the outer surface of the base of the core 5 and pressed until the connecting plate 4 abuts the core 5. The hooking claw 31 is pushed down by the inner surface of the magnetic leg of the core 5 and, after passing through the sliding contact, returns to its original shape due to the elasticity of the material and engages with the core 5 to move the core holder 2 in the thickness W direction of the core 5. Prevent the gap.

FIG. 3 shows another embodiment of the present invention. This composite core holder 11 is different from that shown in FIG. 1 in that instead of the hooking claws 31, locking pieces 32 protruding toward the holding claws 21 are provided at both corners of the free edge of the insulating plate 3. Is. This locking piece
As shown in FIG. 4, 32 is provided on the upper end surface of the end collar 61 with the end collar.
It engages with the recess 81 of the inner surface (the same plane as the bottom surface of the vertical groove 63) of the projecting piece 8 which is provided in a shape in which the side wall of the vertical groove 63 in which the core is fitted on the outer surface of 61 is extended upward.

FIG. 5 shows a state in which the composite core holder 11 is attached to the coil. Since the insulating plate 3 of the composite core holder 11 engages with the reel 6, the movement of the core 5 with respect to the reel 6 is also prevented, and the core 5 is held very stably.

The notch 33 at the center of the free edge of the insulating plate 3 is a relief for reducing the sliding contact resistance of the locking piece when the insulating plate 3 is inserted,
It is formed so as to correspond to the central brim 62 and smaller than its thickness. The notch 33 is omitted in the case of the bobbin without the central collar 62.

C. Effect of the Invention As described above, according to the present invention, since the sandwiching claw is a flexible resin material, the core surface is in contact with a wider area than the metal sandwiching claw, and the insulating plate is Since the core is wound and the core is sufficiently isolated and the movement of the core holder is suppressed, the abutting state of the core can be firmly held, and the marking can be easily displayed, thus providing a good appearance and stable characteristics. It is effective in providing an inexpensive coil.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a composite core holder according to the present invention. FIG. 2 is an external perspective view showing a coil to which the composite core holder shown in FIG. 1 is attached. FIG. 3 is an external perspective view showing another embodiment according to the present invention. FIG. 4 and FIG. 5 are external perspective views showing a reel and a coil attached to which the composite core holder shown in FIG. 3 is applied. 1,11 …… Composite core holder, 2 …… Core holder, 21…
… Clamping claws, 3 ... Insulating plate, 31 ... Hooking claws, 32 ... Locking piece, 33 ... Notch, 4 ... Connecting plate, 5 ... Core, 6
…… Reel, 61 …… End collar, 62 …… Center collar, 63 …… Vertical groove,
7 ... Winding, 8 ... Projection, 81 ... Recess.

Claims (1)

[Scope of utility model registration request] 1. A winding wire is provided on a winding frame having a collar at both ends of a cylindrical winding core, and one magnetic leg of a UU-shaped core is inserted into a central hole of the winding core to make the UU-shaped core a closed magnetic circuit. In the core holder used for the assembled coil, the insulating plate for the winding and the core is placed facing the inner surface of the ring-shaped core holder, and one side edge is connected to each other by the connecting plate to make the insulating resin. Composite core holder characterized by being integrally molded with material.