JPH0751780Y2 - Coil with gears - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention [Industrial field of application] The present invention relates to a structure of a coil with a gear for a transformer / coil, which uses a so-called "day-shaped magnetic core" or a square-shaped magnetic core having no air gap in a magnetic path.

[Conventional technology]

When a DC current weighs in the transformer or coil winding and operates, a gap is provided in the magnetic path of the magnetic core so that the magnetic core is not saturated by the magnetic field generated by the DC current flowing through the winding wound around the magnetic core. When it is necessary to design by taking full advantage of the relative magnetic permeability of a material such as a common mode choke coil, it is necessary to use a magnetic core having no air gap. In the case of using a magnetic core having no void, the toroidal winding machine can be easily used, and thus the annular magnetic core has been mainly used.

However, in terms of winding efficiency with respect to the area of the magnetic core window, a day-shaped core with an integrated EE type core was used, and a coil bobbin divided in two was attached to the magnetic leg of the core, and was integrally attached to the coil bobbin in the center of the coil bobbin. A coil with a gear that drives a gear from the outside and rotates and winds a coil bobbin is also used. In a transformer or coil configured by combining a day-shaped magnetic core with no voids in the magnetic path or a square-shaped magnetic core and combining coil bobbins with gears, as shown in FIG. A circular columnar middle foot 2 was formed, and as shown in FIG. 6, the core 5 was molded by molding with an insulating material and the bobbin positioning protrusions 4 were attached to both ends. Molding the columnar inner legs 2 into a columnar shape is liable to cause burrs, and there is also a problem such as breakage when the columnar inner legs of the magnetic core are molded with resin. In addition, the equipment is large, and the molding of the inner core of the magnetic core needs to be performed in a separate process, which is inefficient in terms of time. Therefore, the conventional cylindrical inner leg 2 shown in FIG. 7 is divided into two parts. The transformer coil made by attaching the gear bobbin 7 has a problem that the workability at the time of assembly is low.

[Problems to be solved by the device]

The present invention uses a day-shaped magnetic core similar to the conventional EE type core in which the cross section of the magnetic core is square, and the resin core has a circular outer circumference on the magnetic core middle foot to which the coil bobbin with a gear is attached.
A coil bobbin with a gear is attached to the core shaft after the divided core shafts are attached. The yield is good assembling by avoiding the molding work, and the core of the magnetic core does not break during molding. An object of the present invention is to provide a coil with a good gear.

B. Configuration of the Invention [Means for Solving the Problems] The present invention uses a day-shaped magnetic core in which the cross section of the magnetic leg of the core of the magnetic core is square. The core made of resin, which has a circular outer circumference and is provided with protrusions for positioning the bobbin on both ends, is divided into two parts in the length direction of the core of the magnetic core, and is fitted and fixed to the core of the core. Is used as a core and a two-piece bobbin with a gear is attached to form a coil with a gear.

That is, the present invention provides a coil with a gear, which is formed by winding a coil bobbin divided into two parts on a linear part of a closed magnetic circuit magnetic core having a linear part having a substantially rectangular cross-section in a part of a magnetic leg of the magnetic core, The linear portion of the magnetic leg of the magnetic core has an inner shape that fits with the cross-sectional outer shape of the linear portion,
Two cores made of resin material, with bobbin positioning protrusions attached to both ends, and having a circular outer periphery, were attached, fitted and fixed to the linear portion of the magnetic leg, and a gear was attached to this core. A coil with a gear, characterized in that a winding wire is formed by connecting two split bobbins.

[Action]

Since the coil with a gear according to the present invention is a day-shaped magnetic core in which the cross section of the core of the magnetic core is square, it is easy to mold the core, and the core of the conventional core has a circular outer cross section. Since it is not necessary to perform molding, the magnetic core is not broken during the molding work, and a coil with a gear can be easily assembled.

Further, since the cross section of the core of the magnetic core is square, the inner diameter of the two-divided core shaft covering the core of the magnetic core is also square, and it is easy to fit and fix the core of the magnetic core. The outer shape is circular,
Moreover, since the positioning protrusions for positioning the two-divided gear bobbin are attached to both ends, the two-divided gear bobbin attached to the core shaft can be positioned uniquely without any deviation in the left and right during winding. , Winding becomes easier.

〔Example〕

An embodiment of a coil with a gear according to the present invention will be described with reference to the drawings. FIG. 2 shows a date-shaped magnetic core to which a winding shaft of a coil with a gear according to the present invention is attached, and a magnetic core of a magnetic core 1 having a rectangular cross section of the middle foot is shown in FIG. The core shaft 5 is obtained by combining two two-piece moldings 8 each having a two-divided electric insulation characteristic and having an inner diameter made of a resin material that fits into the center leg of a magnetic core, and an outer diameter having a circular cross section. Install. Bobbin positioning protrusions 4 are provided on both ends of the core shaft 5, and as shown in FIG. 4, a two-divided gear bobbin 7 that covers the core shaft 5 and is equipped with gears is attached, and as shown in FIG. The magnetic core 1 is incorporated in the L-shaped pin terminal base 9 and wound around the winding core 12. When winding is performed, the gear 11 at the center of the two-divided gear bobbin 7 and the external drive gear 6 are engaged with each other, and the two-divided gear bobbin 7 is rotated by rotating the external drive gear 6 to wind the winding core 12. By winding the winding and connecting both ends of the winding to the pin terminals 10, the gear coil shown in FIG. 1 is formed. When a two-piece gear bobbin with gears is mounted on the two-divided core shaft 8 of the center leg 3 shown in FIG. 2 and winding is performed, the magnetic core 1, the core shaft, and the two-piece gear bobbin with gears are provided. Since the production of the molded article can be performed separately, the resin molding process for the magnetic core can be omitted, and the equipment for molding is unnecessary. Moreover, there is no failure of the magnetic core due to the mold. Further, since the winding shaft is divided into two parts, it can be processed by a simple work such as an assembling work, so that a coil with a gear can be provided which facilitates automation of the assembling.

C. Effects of the Invention [Effects of the Invention] As described above, the day-shaped magnetic core with a square cross section is used, and the core of the core is made of resin and has a square inner diameter and a circular outer diameter. It is a low-cost gear that allows automated assembly because it has a structure in which a two-piece gear bobbin is fitted and fixed to the center leg and is attached and wound, so that a day-shaped magnetic core can also be easily made and damage failures during molding are eliminated. It is possible to provide an attached coil.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a coil bobbin of a coil with gears according to the present invention. FIG. 2 is a perspective view of a magnetic core in which a two-divided winding core shaft made of a resin insulating material is attached to the middle leg of the closed magnetic circuit magnetic core of the coil with gear according to the present invention. FIG. 3 is an external perspective view showing a two-divided core shaft made of a resin insulating material for a gear coil according to the present invention. FIG. 4 is a diagram in which a H-shaped closed magnetic circuit magnetic core according to the present invention and a two-divided winding core shaft made of a resin insulating material are placed on the magnetic core, and a two-divided gear bobbin with a gear is mounted on the winding core shaft. Four
FIG. 4A is an exploded sectional view, and FIG. 4B is an assembled sectional view. FIG. 5 is a perspective view of a closed magnetic circuit magnetic core in which the center leg of the conventional structure is circular. FIG. 6 is an external perspective view of a magnetic core in which a molded product made of a resin insulating material is integrally formed on the middle leg of a conventional day-shaped closed magnetic circuit magnetic core having a circular cross section. FIG. 7 is a sectional view of the magnetic core shown in FIG. 6 when a two-part gear bobbin is attached. DESCRIPTION OF SYMBOLS 1 ... Magnetic core, 2 ... Cylindrical center leg, 3 ... Magnetic core angular center leg, 4 ... Bobbin positioning protrusion, 5 ... Core shaft, 6 ... External drive gear,
7 ... 2-divided gear bobbin, 8 ... 2-divided molded product, 9 ... L-shaped pin terminal base, 10 ... Pin terminal, 11 ... Gear, 12 ... Core,
13 ... Winding.

Claims (1)

[Scope of utility model registration request] 1. A gear-equipped coil formed by winding a coil bobbin divided into two parts on a linear portion of a closed magnetic circuit magnetic core having a linear portion having a substantially rectangular cross-section in a part of a magnetic leg of the magnetic core, The magnetic leg of the magnetic core has an inner shape that fits with the cross-sectional outer shape of the straight portion, is made of a resin material, and has bobbin positioning protrusions at both ends. The coil with a gear is characterized in that the winding core shaft is attached, fitted and fixed to the linear portion of the magnetic leg, and the winding core is wound by connecting a two-divided bobbin having a gear attached thereto.