JPS6130255Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a type of chiyoke coil in which the outer frame portion of each iron core is integrally molded into an endless shape without being divided.

[Technical background of the invention]

BACKGROUND ART Conventionally, a type of chiyoke coil is known in which the outer frame portion of each iron core is integrally molded into an endless shape without being divided. In this product, a central leg piece is integrally protruded from one end of the outer frame of each iron core into a hollow part of the outer frame, and the tip of the central leg piece and the outer frame are connected to each other. The tip of the central leg of this iron core is pushed out below the outer frame, and the central leg is inserted into the hollow part of the coil winding body of the coil bobbin. At the same time, the structure is such that the outer frame portion is fitted to the outside of the coil bobbin across the flange portions at both ends of the coil bobbin.

[Problems with background technology]

In conventional Chi York coils of this type, the distance between the outer surfaces of the flanges at both ends of the coil bobbin is set by adjusting the distance between the outer surfaces of the flanges at both ends of the coil bobbin to prevent axial play of the coil bobbin between the iron core and the coil bobbin. The distance is approximately equal to the distance between the inner surfaces of both ends. However, with a structure in which the outer surfaces of the flanges at both ends and the inner surfaces of both ends of the iron core outer frame are in close contact from the beginning, it is not possible to smoothly attach the iron core to the coil bobbin. First, the assembly efficiency was poor.

[Purpose of invention]

The object of the present invention is to improve workability when attaching such an iron core integrally formed with the outer frame to a coil bobbin.

[Summary of the idea]

The Chi-yoke coil of the present invention has an iron core integrally molded on the outer frame of a coil bobbin wound with a coil, and the distance between the outer surfaces of the flanges at both ends of the coil bobbin is set to the inner side of both ends of the outer frame of the iron core. The distance between the sides is slightly smaller than the distance between the sides, and an iron core fitting part is provided on the outer surface of the flange part at one end to which one end of the outer frame part of the iron core is fitted, and an iron core fitting part is provided on the outer surface of the flange part at the other end. An iron core receiving piece part that supports one side of the other end of the outer frame part of the core is provided protrudingly, and the outer surface of the flange part at the other end having this iron core receiving piece part and the other end of the outer frame part of the iron core are provided. Insert the flat leg part of the iron core holder from the other side of the other end of the outer frame part of the iron core into the gap between the inner side surface of the iron core part, and
This iron core holder and the flange portion with which it comes into pressure contact are provided with a fitting part that prevents the iron core holder from coming off. Holds and secures the core to prevent vibration of the iron core.

[Example of idea]

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

As shown in FIGS. 1 and 2, a coil bobbin 2 with a coil 1 wound thereon is laminated with a large number of iron cores 3 made of thin plates to form a chiyoke coil. Also, the distance between the outer surfaces of the flanges 5 and 6 provided at both ends of the coil winding trunk 4 of the coil bobbin 2.
L ₁ is set to be slightly smaller than the distance L ₂ between the inner surfaces of both ends 8 and 9 of the outer frame portion 7 of the iron core 3. A gap 10 is thus formed.

As shown in FIGS. 2 and 6, each iron core 3 is connected to the outer frame portion 7 integrally formed in a rectangular shape.
The center leg piece 1 is inserted into the hollow part of the outer frame part 7 from the one end part 8.
3 are integrally provided in a protruding manner, and the distal end of the central leg portion 13 and the other end portion 9 of the outer frame portion 7 are separated by a gap 14 of approximately 0.3 to 0.5 mm.

Further, as shown in FIG. 2, the coil bobbin 2 has iron core fitting parts 15 and 16 that fit the one end part 8 of the outer frame part 7 of the iron core 3 onto the outer surface of the flange part 5 at one end.
is horizontally protruding, and the flange portion 6 on the other side
An iron core receiving piece 17 that supports the lower side of the other end 9 of the outer frame 7 of the iron core 3 is horizontally protruded from the outer surface of the iron core 3, and is attached from the lower side of the flanges 5 and 6 at both ends. Piece part 1
8, 19 are horizontally protruded, and this mounting piece part 18, 1
Lead wire pull-out grooves 24 and 25 are cut from both sides between the iron core fitting part 15 and the iron core receiving piece part 17, and two leads are formed at the tips of the mounting pieces 18 and 19, respectively. A line drawing groove 20 is cut and formed. Further, a mounting piece 21 is provided horizontally protruding from the upper side of the flange portion 5 at one end, and lead wire pull-out grooves 22 are cut from both sides between the mounting piece 21 and the upper iron core fitting portion 16. , and a fitting recess 23 having a wedge-shaped cross section is provided on the upper outer surface of the flange portion 6 at the other end. The above-mentioned parts of this coil bobbin 2 are integrally molded from synthetic resin.

Further, in this coil bobbin 2, with respect to the gap 10 between the outer surface of the flange portion 6 at the other end having the iron core receiving piece portion 17 and the inner surface of the other end portion 9 of the outer frame portion 7 of the iron core 3, The pair of flat legs 27 of the iron core presser 26 are inserted from above the other end 9 of the outer frame 7 of the iron core 3.

As shown in FIGS. 2 to 5, this iron core holding body 26 has the pair of flat legs 27 protruding from the lower surface on the flange side, and the lower surface is attached to the iron core holding surface 2.
9, and furthermore, a fitting convex portion 30 having a wedge-shaped cross section is provided on the surface that presses against the flange portion 6, and this fitting convex portion 3 is provided with a wedge-shaped cross section.
0 and the fitting recess 23 of the flange portion 6 form a fitting portion that prevents the iron core presser body 26 from coming off.

To assemble this York coil, as shown in FIG. 2, the tip of the central leg portion 13 of the iron core 3 is pushed out below the outer frame portion 7 with respect to the coil bobbin 2 on which the coil 1 is wound. Insert the central leg piece 13 into the hollow part of the coil winding trunk 4 of the coil bobbin 2, and insert the one end 8 of the outer frame 7 into the iron core fitting part 1.
5 and 16, and the other end 9 is fitted onto the iron core receiving piece 17 from above the flange 6. After a large number of iron cores 3 are fitted onto the coil bobbin 2 in this manner, a gap material (not shown) selected as appropriate is used for the gap 14 formed at the tip of the central leg piece 13.
Insert and secure. And finally, the iron core presser body 26
The pair of flat leg parts 27 are inserted into the gap 10 between the outer surface of the flange part 6 and the inner surface of the outer frame part 7 of the iron core 3, and the iron core 3 is pressed by the iron core pressing surface part 29. , the fitting protrusion 30 is fitted into the fitting recess 23 to prevent the iron core presser body 26 from coming off. As a result, the iron core holding body 26 holds and fixes a large number of iron cores 3 and prevents their vibration.

In addition, the installation of this chain yoke coil can be done by gluing the lower surfaces of the mounting pieces 18 and 19 to the mounting surface, or by attaching the iron core fitting part 15, the iron core receiving piece 17, and the iron core retainer as shown in FIG. The circumferential side of the body 26 slightly protrudes from the outer circumferential surface of the iron core 3, and the circumferential sides of the lower mounting pieces 18 and 19 similarly protrude slightly from the outer circumferential surface of the iron core 3. The tips of the fitting part 16 and the mounting piece part 21 also protrude slightly from the outer surface of the iron core 3, so each part 15, 16, 1
7, 18, 19, 21, and 26 to the mounting surface, or by gluing the upper surface of the upper mounting piece 21 and the iron core retainer 26 to the mounting surface. Fix it to the mounting surface.

At that time, five sets of lead wire pull-out grooves 20, 20,
The lead wire of the coil 1 is drawn out by selecting an easy-to-use drawing groove among 22, 24, and 25.

[Effect of idea]

According to the present invention, the distance between the outer surfaces of the flange portions at both ends of the coil bobbin is set to be slightly smaller than the distance between the inner surfaces of both ends of the outer frame portion of the iron core, and the resulting distance between the flange portion and the outer frame portion is Since the flat legs of the core holder are press-fitted into the gap between can be done smoothly and has good workability, and the iron core can be securely pressed and fixed by the iron core holder, which is prevented from coming off by the fitting part between the flange part, and the vibration of each iron core can be suppressed. Can be effectively prevented.

[Brief explanation of drawings]

Fig. 1 is a plan view of the chiyoke coil of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a front view of its iron core holder, Fig. 4 is its side view, and Fig. 5 is its bottom view. FIG. 6 is a plan view of the iron core. 1... Coil, 2... Coil bobbin, 3... Iron core, 5, 6... Flange part, 7... Outer frame part, 8,
9... End, 10... Gap, 15, 16... Iron core fitting part, 17... Iron core receiving piece part, 23... Fitting recess, 26... Iron core holding body, 27... Flat Legs, 3
0... Fitting convex portion.

Claims (1)

[Scope of utility model registration request] In a coil bobbin with a coil wound thereon, which is equipped with an iron core whose outer frame is integrally molded, the distance between the outer surfaces of the flanges at both ends of the coil bobbin should be greater than the distance between the inner surfaces of both ends of the outer frame of the iron core. The iron core fitting part is provided on the outer surface of the flange part at one end to fit one end of the outer frame part of the iron core, and the outer frame part of the iron core is provided on the outer surface of the flange part at the other end. An iron core receiving piece part that supports one side of the other end is provided protrudingly, and between the outer surface of the flange part of the other end having this iron core receiving piece part and the inner surface of the other end of the outer frame part of the iron core. Insert the flat leg of the core holder into the gap from the other end of the outer frame of the iron core, and prevent the core holder from coming off against this core holder and the flange to which it comes into pressure contact. A chiyoke coil characterized by having a fitting part.