JP3990420B2 - Bobbin, transformer and bobbin winding method - Google Patents

Description

  The present invention relates to a bobbin used for a transformer such as a power transformer, a signal transformer non-insulated or an insulating transformer used in various electronic devices, and a winding method around the transformer and the bobbin.

  2. Description of the Related Art Conventionally, as a bobbin used in a transformer incorporated in office equipment, home appliances, etc., a winding body portion to be wound is formed in a circular shape, a rectangular shape, an oval shape, or the like. Examples of such conventional bobbins are disclosed in Patent Documents 1 to 4.

JP 2000-323333 A Japanese Utility Model Publication No. 3-53462 JP-T-2004-514282 Japanese Utility Model Publication No. 5-87918

  The shape of the cross section perpendicular to the core direction of the inner hollow portion and the outer peripheral portion of the bobbin winding body of the conventional bobbin is a circle, a square, an oval, etc. For example, in the case of a square, the first perpendicular to a certain side The shape of both sides divided by the center line is symmetrical with respect to the center line, and the shape of both sides divided by the second center line perpendicular to the first center line is also symmetrical. In the case of a circular shape or an oval shape, the shape is symmetrical with respect to two center lines perpendicular to each other. For this reason, when a transformer bobbin having a primary side terminal and a secondary side terminal is mounted on the winding axis of the chuck of the winding machine and winding is performed, the positions of the primary side terminal and the secondary side terminal are difficult to understand. There is a possibility that an error occurs when the lens is reversed 180 degrees with respect to the center of the winding axis. In addition, an error in bobbin attachment is likely to cause an error in tangling the secondary winding to the primary terminal or tangling the primary winding to the secondary terminal.

  Further, since the direction of the bobbin is difficult to understand, there is a risk of performing the work in the wrong direction in processes such as marking, measurement, and mounting on the substrate.

  In view of the above-described problems, the present invention makes it easy to determine the mounting direction of a bobbin in a coil component manufacturing process such as winding work, thereby improving work efficiency and improving the yield. It is an object of the present invention to provide a bobbin, a transformer using the bobbin, and a winding method around the bobbin.

The bobbin of the present invention has a cylindrical winding body portion for winding, and is used for a transformer in which a middle leg of a magnetic core matching the cross-sectional shape of the inner space portion is inserted into the inner space portion of the winding body portion. Bobbins,
The shape of the cross section perpendicular to the core direction of the inner hollow portion of the winding drum portion is substantially oval , and the thickness of the winding drum portion is uniform over the entire circumference .

Further, the transformer of the present invention has two terminal blocks such that the cylindrical winding drum portion on which the winding is wound has flanges at both ends, and the winding drum portion is interposed between one of these flanges. A vertical transformer having a bobbin into which a middle leg of a magnetic core matching the cross-sectional shape of the inner space portion is inserted into the inner space portion of the winding body portion ,
The bobbin according to claim 1 as the bobbin.
It is characterized by that.

In addition, the transformer of the present invention has flanges on both ends of a cylindrical winding body portion on which windings are provided, and terminal blocks are provided on these flange portions, respectively, and a mounting surface to the substrate is formed by these terminal blocks. And a horizontal transformer having a bobbin into which the middle leg of the magnetic core matching the cross-sectional shape of the inner space portion is inserted into the inner space portion of the winding body portion ,
The bobbin according to claim 1 as the bobbin.
It is characterized by that.

The bobbin winding method according to the present invention has a cylindrical winding body portion for winding, and the inner leg of the winding body portion is inserted with the middle leg of the magnetic core matching the cross-sectional shape of the inner space portion. A winding method for a transformer bobbin to be worn,
The shape of the cross section perpendicular to the core direction of the inner hollow portion of the bobbin body of the bobbin is an oval shape, and the wall thickness of the bobbin body is uniform over the entire circumference,
The cross-sectional shape of the winding axis of the winding machine for winding the bobbin is a shape that matches the cross-sectional shape of the inner space,
Fitting the inner space of the winding body to the winding shaft,
The winding is wound around the primary side terminal or the secondary side terminal of the terminal block of the bobbin,
By rotating the winding shaft, the bobbin is also rotated and wound around the winding body portion.

Since the bobbin of the present invention is configured such that the shape of the cross section perpendicular to the core direction of the inner hollow portion of the winding drum portion is substantially oval, and the thickness of the winding drum portion is uniform over the entire circumference . In the winding work, the position of the bobbin in the rotating direction can be easily determined, and the winding machine can be easily set on the winding shaft, thereby improving work efficiency.

Also, by using an oval cross-sectional shape that matches the inner space of the bobbin, the bobbin cannot be set unless the bobbin terminal block direction matches the direction of the reel. When setting the bobbin on the bobbin, the direction of the bobbin is automatically determined, and the occurrence of a setting error can be avoided.

  In addition, since the initial setting position in the rotation direction of the winding axis is constant, the initial setting position in the rotation direction of the terminal block, primary side terminal, and secondary side terminal is automatically constant, and the winding end is tangled. It is possible to avoid mistaken terminals. For the same reason, it is possible to avoid work mistakes in stamping, measuring, and mounting on a substrate. And from these things, the yield in manufacture of a transformer can be improved.

1, 2, and 3 are a front view, a side view, and a rear view, respectively, showing an embodiment of the bobbin of the present invention, and FIG. 4 is a cross-sectional view taken along line EE in FIG. 3. This embodiment is a terminal for attaching the primary side terminal 5 and the secondary side terminal 6 to only one of the flange portions 3 and 4 formed at both ends of the winding drum portion 2 for winding the bobbin 1. A vertical transformer bobbin provided with bases 7 and 8 is shown.

  In FIG. 4, O represents the vertical and horizontal center points of the inner space of the winding drum section 2. Here, the center line of the opposing direction of the terminal blocks 7 and 8 in the cross section in the vertical direction to the core of the inner space of the winding drum section 2 is the Y axis, and the direction perpendicular to the opposing direction of the terminal block in the cross section is The center line is the X axis. At this time, in this embodiment, the shape of the cross section is formed so that the cross section of one region 10 of the inner space divided by the X axis and the cross section of the other region 11 form an asymmetric shape. . In the present embodiment, the cross-sectional shape of the inner hollow portion (same for the outer peripheral portion) of the winding drum portion 2 is formed in an oval shape.

FIG. 5 is a front view showing an example of a vertical transformer constructed using the bobbin, and FIG. 6 is a side view thereof. This transformer uses two E-type cores 12 and 12 made of ferrite. Each core 12 is provided to project from the end surface portion 13 between the end surface portion 13, a pair of outer foot portions 14, 14 provided projecting from both ends of the end surface portion 13, and the pair of outer foot portions 14, 14. And a midfoot 15. Here, the middle foot portion 15 is formed in an asymmetric shape that matches the cross-sectional shape of the inner space of the winding drum portion 1.

  Reference numeral 16 denotes a winding wound around the winding body 2 and having a tape wound around its outer periphery, and includes a primary winding and a secondary winding. Thus, while inserting each middle leg part 15 of a pair of cores 12 and 12 with respect to the winding drum part 2 of the bobbin 1 which provided winding 16 to the winding drum part 2, outer leg parts 14 and 14 are primary. The cores 12 and 12 are combined with the bobbin 1 by being fitted between the terminal block 7 for side terminals and the terminal block 8 for secondary terminals. Then, a tape (not shown) is affixed to the outer periphery of the combined cores 12 and 12 or fixed by adhesion or the like.

  FIG. 7 is a side view showing a working state in which the bobbin 1 is set on the winding shaft 21 of the winding machine 20 and winding is performed, and FIG. 8 is a sectional view taken along line FF in FIG. As shown in these drawings, the winding shaft 21 is formed so that its cross-sectional shape matches the inner space of the winding body 2 of the bobbin 1. When the winding work is performed using the winding machine 20, the winding body portion 2 of the bobbin 1 is fitted to the winding shaft 21 whose initial setting position in the rotation direction is determined in advance, and the primary side terminal 5 or the secondary side The winding is wound on the side terminal 6 and the winding shaft 21 is rotated to wind the winding on the winding drum section 2. Such a winding process is a plurality of processes required for the number of windings by the transformer. In the plurality of winding processes, the initial setting position in the rotation direction of the winding shaft 21 may be set differently.

When performing such a winding operation, the outer peripheral portion of the winding drum portion 2 is formed in an oval shape so as to form an asymmetric shape with the X-axis interposed therebetween. Therefore, in the winding operation, the position of the bobbin 1 in the rotation direction is visually checked. Is easy to distinguish. For this reason, the bobbin 1 can be easily set on the winding shaft 21 and the working efficiency is improved.

  Further, if the inner space of the winding drum portion 2 of the bobbin 1 and the winding shaft 21 are formed so as to be asymmetric with respect to the X axis as in the present invention, the direction of the winding drum portion 2 of the bobbin 1 is the winding shaft. Since the bobbin cannot be set unless the direction of the bobbin 21 is matched, the direction of the bobbin 1 is automatically determined when the bobbin 1 is set on the winding shaft 21, and the occurrence of a setting error can be avoided.

  Further, since the initial setting position in the rotation direction of the winding shaft 21 is constant, the initial setting positions in the rotation direction of the terminal blocks 7, 8 and the primary side terminal 5 and the secondary side terminal 6 are constant. It is also possible to avoid making mistakes in the target terminals that make a mistake. Similarly, work errors can be avoided in marking, measurement, and mounting on a substrate. As a result, the yield in the manufacture of the transformer can be improved.

In the embodiment shown in FIG. 4, the inner space of the winding drum section 2 has a wide Y-axis direction and a narrow X-axis direction. The widths may be the same or the width in the Y-axis direction is narrow and the X-width direction is wide. Further, the hollow portion and the outer peripheral portion of the winding body 2, rather than oval and asymmetric two areas divided by the X-axis, oval to asymmetrical divided two regions in the Y-axis It may be.

FIG. 9 shows another embodiment of the present invention. In this embodiment, the Y-axis of the winding drum portion 2F that is substantially oval is set in the longitudinal direction of the cross-section of the winding drum portion 2F, and the Y-axis is set. The terminal blocks 7 and 8 are formed to be inclined with respect to the facing direction.

Also by the embodiment shown in FIG. 9 , the same operational effects as those of the embodiment shown in FIGS.

In the above embodiment are substantially uniform over the entire circumference of the wall thickness of the winding body.

FIG. 10 is a rear view showing another embodiment of the bobbin of the present invention, and FIG. 11 is a side view of the bobbin. The bobbin 23 is used for a horizontal transformer. The bobbin 23 is provided with a primary side terminal block 27 and a secondary side terminal block 28 on the flange portions 25 and 26 at both ends of the winding body portion 24, respectively, thereby forming a mounting surface 29 on a substrate (not shown). is there.

In FIG. 10 , O is the vertical and horizontal center of the inner space of the winding drum part 23. In the bobbin 23, with respect to a cross section perpendicular to the winding core direction of the inner hollow portion of the winding body portion 24, a center line perpendicular to the mounting surface 29 in the cross section is a Y axis. A center line parallel to the mounting surface 29 in the cross section is taken as the X axis. At this time, the shape of the cross section of the inner hollow portion of the winding drum portion 24 is asymmetrical between the cross section of one region 30 of the inner hollow portion of the winding drum portion 24 divided by the X axis and the cross section of the other region 31. It is formed into a shape to make. In the present embodiment, the cross-sectional shape of the inner hollow portion of the winding drum portion 24 is formed in an approximately oval shape in which the lower portion of the two regions divided by the X axis parallel to the mounting surface is wider than the upper portion. Yes.

10 and 11 also, the winding is wound around the winding drum 24, the middle leg of the E-type core is inserted into the winding drum 24, and the outer leg is winding. The transformer is configured so as to be located on both sides.

In the embodiment related to the horizontal transformer of FIGS . 10 and 11 , as in the embodiment shown in FIGS . 1 to 9 , the work efficiency in each work process of winding, marking, measurement, and mounting to the substrate is improved. The effect of improvement, reduction of work errors, and improvement of yield can be achieved.

It is a front view which shows one Embodiment of the bobbin by this invention. It is a side view of FIG. It is a rear view of FIG. It is EE sectional drawing of FIG. FIG. 4 is a front view of a transformer using the bobbin according to the embodiment shown in FIGS. 1 to 3. FIG. 6 is a side view of the transformer of FIG. 5. It is a side view which shows the winding work state to the bobbin of this Embodiment. It is FF sectional drawing of FIG. FIG. 5 is a view corresponding to FIG. 4 showing another embodiment of the bobbin according to the present invention. It is a rear view which shows other embodiment of the bobbin by this invention. It is a side view of the bobbin of Figure 10.

Explanation of symbols

1: bobbin, 2, 2F: winding body part, 3, 4: collar part, 5: primary side terminal, 6: secondary side terminal, 7, 8: terminal block, 10, 11: divided inner space part, 12: E type core, 13: End face part, 14: Outer foot part, 15: Middle foot part, 16: Winding, 20: Winding machine, 21: Winding shaft, 23: Bobbin, 24: Winding body part, 25 , 26: collar part, 27: primary side terminal block, 28: secondary side terminal block, 29: mounting surface, 30, 31: divided inner space, O: vertical and horizontal center

Claims (4)

A transformer bobbin having a cylindrical winding body portion for winding, and a magnetic core middle leg matching the cross-sectional shape of the inner space portion being inserted into the inner space portion of the winding body portion,
The bobbin characterized in that the shape of the cross section perpendicular to the core direction of the inner hollow portion of the winding drum portion is oval, and the thickness of the winding drum portion is uniform over the entire circumference . A cylindrical winding drum portion on which windings are provided has flanges at both ends, and one of these flanges is provided with two terminal blocks so that the winding drum portion is interposed therebetween, and the winding drum portion A vertical transformer having a bobbin in which a middle leg of a magnetic core matching the cross-sectional shape of the inner space is inserted into the inner space of the inner space ,
The bobbin according to claim 1 as the bobbin.
Transformer characterized by that . There are flanges on both ends of the cylindrical winding drum portion on which the winding is performed, and terminal blocks are respectively provided on these flange portions to form a mounting surface to the substrate by these terminal blocks, and the winding drum portion A horizontal transformer having a bobbin into which a middle leg of a magnetic core matching the cross-sectional shape of the inner space is inserted into the inner space ,
The bobbin according to claim 1 as the bobbin.
Transformer characterized by that . Winding to a bobbin for a transformer having a cylindrical winding body portion on which winding is performed, and a middle leg of a magnetic core matching the cross-sectional shape of the inner space portion being inserted into the inner space portion of the winding body portion A method,
The shape of the cross section perpendicular to the core direction of the inner hollow portion of the bobbin body of the bobbin is an oval shape, and the wall thickness of the bobbin body is uniform over the entire circumference,
The cross-sectional shape of the winding axis of the winding machine for winding the bobbin is a shape that matches the cross-sectional shape of the inner space,
Fitting the inner space of the winding body to the winding shaft,
The winding is wound around the primary side terminal or the secondary side terminal of the terminal block of the bobbin,
A bobbin winding method, wherein the bobbin is rotated by rotating the winding shaft and wound around the winding body.

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