JP2001223123A - Inductance part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductance part which is capable of coping flexibly with a large input power or an output power of various kinds and can be easily modified in manufacturing method and product specifications. SOLUTION: A transformer 1 equipped with at least a first coil 8 formed by winding a conductive wire 6, second board coils 2, a coil mounting part 17, a frame 3 equipped with a coil mounting part 17 where the second board coils 2 are inserted in a freely detachable manner, and a core piece 4 inserted into a core insertion hole 10 provided to the coils, so that this transformer 1 which has both the merit of a transformer equipped with a coil composed of a bobbin and a conductive wire wound on it and the merit of another transformer equipped with a thin coil formed of a board or the like and is capable of coping flexibly with a large input power and an output power of various kinds can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an inductance component having a coil such as a transformer or a choke coil.

[0002]

2. Description of the Related Art An inductance component is a circuit component such as a transformer or a choke coil having a core and a coil as main components. Also, its specifications are determined according to various circuits to be connected and their combination,
There is a great variety.

[0003] For example, many transformers that have been used in the past are manufactured by winding a plurality of conductors on a single bobbin, and the type and number of turns of the conductors are determined until the specifications of the circuit to be connected are determined. And other transformer specifications cannot be determined. Further, since the specification of the transformer must be determined after the specification of the circuit is determined, much time is required from design to manufacture. In addition, since multiple conductors are wound around one bobbin, when changing the specifications of the circuit, it is necessary to remove the conductor wound around the transformer and rewind another conductor. No. As described above, the structure of the conventional transformer is difficult to change or disassemble, and cannot flexibly cope with a design change such as a change in circuit specifications.

Therefore, in recent years, the applicant of the present invention has issued a patent No. 29
A transformer as disclosed in Japanese Patent No. 56051 has been developed. This transformer is composed of a plurality of types of substrates each having a winding portion in which a conductive pattern is formed in a spiral shape on a substrate, and a lead portion for inserting and connecting the main substrate formed integrally with an end portion of the winding portion. A coil and a frame provided with a coil mounting portion capable of stacking these substrate coils in a plurality of stages are provided. This transformer can be assembled simply by mounting the unitized board coil on the coil mounting part, and it has a structure that is easy to assemble and disassemble, so it can flexibly respond to changes in circuit specifications etc. it can. Furthermore, since each of the substrate coils is a unit constituting a transformer and can be standardized, by preparing a plurality of types of substrate coils in advance, a multi-output of a desired specification can be obtained in a short time. Transformers can be manufactured.

In Japanese Patent Application Laid-Open No. 10-010748, the input board and the output board are independent modules, and the specifications can be changed by attaching and detaching each module from a case serving as a chassis. A multi-output power supply device is disclosed. The main transformer used in this power supply is composed of multiple coils and cores, each of which is an independent unit,
Each coil and the core have a structure that can be easily attached and detached.

[0006]

In the case of a power supply device having this type of transformer, a plurality of outputs of different voltages are often provided for a certain input. In most cases, only the output side coil is replaced with the output side coil as it is.

That is, if only the output side (secondary side) coil is made detachable (replaceable), it is possible to sufficiently respond to a request for specification change after assembly.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an inductance component which can flexibly cope with various output powers and which can be easily manufactured and its specifications can be changed.

[0009]

In order to achieve the above object, an inductance component according to the present invention comprises an electric component between at least one first coil formed by winding a conductive wire and the first coil. At least one unitized second coil for transmitting the second coil insulated, a frame body including a coil mounting portion to which the second coil can be removably mounted, the first coil and the second coil. And a core inserted through the second coil, wherein the first coil is wound around the frame.

According to the above configuration, the primary winding and the auxiliary power supply winding, which are rarely changed, can be wound in advance on the frame as the first coil, and can be easily attached and detached. It is possible to use the second coil for which the coil can be easily attached and detached as the secondary winding requiring the following.

The second coil may be a substrate coil in which a conductive pattern is formed in a spiral shape on a substrate, or a sheet coil in which a conductive metal material is formed into a sheet shape and coated with an insulating material. Can be used.

Further, when the second coil is mounted on the coil mounting portion, the second coil and its core insertion hole are held in a state of being positioned with respect to the frame. It is also possible to provide a holding means, so that the assembled second coil can be stably held by the frame.

Further, when the second coil is mounted on the coil mounting portion, a conductor lead-out portion provided on a peripheral portion of the second coil is inserted into an insertion hole provided on the coil mounting portion. The frame is provided with pins, and when the inductance component is mounted on a circuit board, the pins are mounted on a circuit board or the like on which the inductance component is mounted. It is also possible to use a structure in which the frame body is fixed to the circuit board by inserting it into the provided hole, and by doing so, a circuit board on which the inductance component is attached, and the inductance component Can be easily attached and detached.

Further, in order to fix the core to the frame, a structure having a pair of clamps, each of which can be detachably attached to the frame independently, is used, so that the inductance component can be easily disassembled. .

In addition, by winding the first coil around a bobbin formed integrally with the frame, the number of components can be reduced. In addition, the said frame body,
It has a coil mounting portion to which the second coil is mounted, and a bobbin portion around which the first coil is wound, and the coil mounting portion and the bobbin portion are configured to be detachable. It is also possible to use a simple structure.

Further, by providing an electromagnetic shield layer on the frame, it is possible to reduce magnetic flux leakage to the outside when the inductance component is used.

Further, the frame can be formed of a material having high heat conductivity, and by doing so, the heat radiation of the inductance component can be improved.

Further, the present inductance component is a transformer, and the first coil is a primary winding of the transformer,
Preferably, the second coil is used as a secondary winding of the transformer.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the inductance component of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view showing an embodiment of the inductance component of the present invention, FIG. 2 is an exploded perspective view showing the structure of the inductance component of the present invention, and FIG. FIG. 3 (b) is a perspective view of the substrate on which the inductance component is mounted. FIG. 4 is a cross-sectional view taken along line AA ′ in FIG.
(A) is a front view of a substrate coil used for the inductance component, and (b) of FIG.
It is a line sectional view. FIG. 6A is a front view of a sheet coil as another embodiment of the second coil of the inductance component, and FIG. 6B is a cross-sectional view taken along line CC ′. FIG. 7 is a perspective view of a flat coil which is another embodiment of the second coil. The inductance component according to the present embodiment is a transformer mainly used as a main transformer of a device such as a power supply.

As shown in FIGS. 1 and 2, a transformer 1, which is an inductance component of the present invention, has a plurality of substrate coils 2 as secondary windings, holds these substrate coils 2, and is located at a predetermined position. It is composed of a frame 3 for fixing, a core composed of a pair of core pieces 4 inserted into the substrate coil 2 and a conductor coil section 8 described later, and a clamp 5 for fixing the core piece 4 to the frame 3. Have been. A bobbin 18 for winding the conductor 6 is integrally formed with the frame 3, and the bobbin 18 is provided with a conductor 6 as a primary winding.
Is wound to form the conductor coil portion 8. In addition,
In the present embodiment, the conductor 6 constitutes a first coil of the present invention, and the substrate coil constitutes a second coil of the present invention.

As shown in FIG. 5, the substrate coil 2 has a winding portion 12a in which conductive patterns 11 are spirally provided on both surfaces of a thin-layer substrate 9 having an insulating property. A substantially circular core insertion hole 10a is formed at the center of the winding portion 12a. A pair of projections 13 are formed on one side of the winding portion 12a so as to project a part of the thin-layer substrate 9 in the left-right direction and engage with a part of the frame 3. On the opposite side of these projections 13, the thin-layer substrate 9 is
A conductor lead-out portion 14 protruding outward from 2a is provided. The conductor lead-out portion 14 is provided with connection terminals 14a and 14b that contact both ends of the conductive pattern. The dimensions, such as the shape, plate thickness, outer diameter, etc., of these substrate coils 2 are all substantially the same, so that a combination of a plurality of secondary windings and an output circuit can be standardized.

The substrate coil 2 is an example of a second coil mounted on the frame 3, and if necessary,
A sheet coil 2a in which both surfaces of a winding portion 12b made of an annular conductive metal plate material are covered with an insulating sheet 15 as shown in FIG. 6, or a resin-made flat bobbin 1 as shown in FIG.
It is possible to use a flat coil 2b in which the conductive wire 6 is wound around 6, or other various coils.

As shown in FIGS. 1 to 3A, the frame 3 is a rectangular frame-shaped coil mounting portion 17 made of resin or the like.
A pair of bobbin portions 18, 18, which are located on both sides of the coil mounting portion 17 in the core mounting direction and form the conductive wire coil portion 8 by winding the conductive wire 6,
8 and 18, provided outside the pair of core pieces 4.
And supporting frames 19 for supporting and fixing the supporting frame. Although the two bobbin portions 18 are provided in the present embodiment, the number of the bobbin portions 18 is not limited to the present embodiment.
It is also possible to provide more than one.

The coil mounting section 17 is shown in FIGS.
As shown in FIG. 3, engagement frames 20, 20 that engage with the projections 13 of the substrate coil 2 mounted on the coil mounting portion 17,
Bottom plate 2 on which conductor lead-out portion 14 of substrate coil 2 is mounted
1 and a pair of side plates 22, 22 for connecting these.

As shown in FIGS. 1 to 4, when the substrate coil 2 is mounted, the engagement frame 20 guides the substrate coil 2 and, after the substrate coil 2 is mounted, the protrusion of the substrate coil 2. A plurality of coil guide projections 23 for supporting the motor 13 are provided. The grooves between the coil guide projections 23 hold the projections 13 of the substrate coil 2 in a state of being positioned with respect to the frame 3 as shown in FIG.

As shown in FIG. 3B, when the substrate coil 2 is mounted on the coil mounting portion, the conductor extraction portion 14 of the substrate coil 2 is inserted into the bottom plate 21 as shown in FIG. An insertion hole 24 for positioning the
A pair of pins 27 for attaching the transformer 1 to a hole 26a provided in the circuit board 25 or the like shown in FIG. 3B is provided. The pin 27 is inserted into the hole 26a of the circuit board 25 shown in FIG. 3B, and the frame 3 is fixed to the circuit board 25 by friction generated between the hole 26a and the pin 27. . By using such a structure, the transformer 1 can be easily attached to and detached from the circuit board 25. When the transformer 1 is fixed, not only the friction between the pin 27 and the hole 26a but also the friction between the conductor lead portion 14 and the hole 26b can be used.

The conductor lead-out portions 14 positioned by the insertion holes 24 of the bottom plate 21 are arranged in a regular manner. By doing so, the board coil 2 and the circuit board 25 can be easily attached and detached, and the connection terminals 14a, 14b
And the circuit board 25 need not be soldered.

The side plates 22, 22 are shown in FIGS.
(A) As shown in FIG.
A substantially rectangular plate-shaped member having
And the bottom plate 21 are connected.

As shown in FIGS. 2 to 4, the bobbin portion 18 is provided at a predetermined distance outside the side plate 22 provided on the coil mounting portion 17, and has a core insertion hole 10b. The flange portion 28 and the side plate 2
2 and a cylindrical portion 29 connecting the flange portion 28. The flange portion 28 has cutouts on both sides corresponding to the shape of the outer leg 32 of the core shown in FIG. By winding a conducting wire (primary winding) 6 around the cylindrical portion 29, the conducting wire coil portion 8 constituting the first coil of the present invention is formed. The conductor coil portion 8 provided by winding the conductor wire 6 around the bobbin portion 18 in this manner has less restrictions on the number of turns and the thickness of the wire rod than the substrate coil 2, and can provide a large power of the primary winding. Is also a coil that can be used.

The bobbin portion 18 is provided with a wire fixing member 34 for fixing both ends of the wound wire 6 as shown in FIGS. 3A and 4. The conductor 6 is inserted into the groove 35 of the fixing member 34, and the conductor 6
Is fixed. In the present embodiment, the conductive wire 6 is fixed by the conductive wire fixing member 34. However, the present invention is not limited to this embodiment, and may be fixed by resin impregnation or the like. The bobbin portion 18 can be provided separately from the coil mounting portion 17. In this case, the conductor coil portion 8 can be freely attached and detached and replaced.

Each of the support frames 19, 19 is a rectangular frame integrally provided on the flange portion 28, and the clamp 5 is provided at both ends thereof as shown in FIGS. 2 and 3 (a). A clamp guide projection 29 for guiding both sides of the clamp 5 at the time of attachment and a locking hole 33 provided in the clamp 5 described later are fitted to fit the clamp 5 into the support frame 19.
And a locking piece 30 for fixing the locking piece 30 to the base.

The frame 3 is formed of a material having good electromagnetic shielding properties, or the frame 3 is formed of resin or the like.
The electromagnetic noise generated from the transformer 1 can be reduced by providing an electromagnetic shield layer on the surface of the transformer 1. Further, the frame 3 can be formed of a material containing a material having high heat conductivity and low conductivity such as silicon, mica, and ceramic.
The heat radiation of the transformer 1 can be improved without impairing the insulation of the frame 3. In the present embodiment,
Core insertion portion 17, bobbin portions 18, 18, support frame 1
9 and 19 are integrally formed, but they can be provided separately. In that case, bobbin part 1
The frame 3 is constituted by three members, that is, a pair of members formed integrally with the supporting frame 8 and the support frame 19, and a member forming the coil mounting portion 17, and a pair of members formed integrally with the bobbin 18 and the support frame 19. What is necessary is just to use the structure which a member attaches to the both sides of the member which comprises the said coil mounting part 17.

The core piece 4 is, as shown in FIGS.
It is composed of a pair of core pieces 4 of substantially the same shape formed of a magnetic material. And each core piece 4 is a bobbin part 1
8 and the middle foot 31 inserted into the coil insertion hole 10a of the board coil mounted on the coil mounting portion 17
And an outer leg 32 located outside the conductor coil portion 9 and the substrate coil 2, and is formed so that its longitudinal section becomes an E-shape. In addition, these core pieces 4 are
2, the core pieces 4 face each other as shown in FIG. 2, and the end faces of the opposed middle foot 31 and the outer foot 32 are in contact with each other.
Is formed.

As shown in FIGS. 1 and 2, each of the clamps 5 is formed by bending a metal plate into a substantially U-shape, and has a support frame 19 of the frame 3 at both ends. An engagement hole 33 for fixing the core piece 4 to the support frame 19 by fitting with the provided engagement piece 30 is provided.
Further, the clamp 5 is configured such that the core piece 4
Is pressed toward the support frame 19, so that the ends of the core pieces 4 abut without any gap.

Hereinafter, a method of assembling the transformer 1 will be described in detail. First, the wire 6 is attached to each bobbin portion 18 of the frame 3.
To form a conductor coil portion 8 forming a primary winding.
At this time, the wire fixing members 34 provided on each bobbin portion 18
The conductor 6 is inserted into the groove 35, and the conductor 6 is fixed. Next, the substrate coil 2 is inserted into the coil mounting portion 17 of the frame 3. At this time, the conductor lead-out part 14 of the substrate coil 2 is inserted into the insertion hole 24 provided in the bottom plate 21 of the coil mounting part 17, and the protrusion 13 provided on the opposite side of the conductor lead-out part 14 is attached to the coil mounting part 17. Engage with the engagement protrusion 23 provided on the engagement frame 20 of the portion 17.

After all the substrate coils 2 have been inserted, the pair of core pieces 4 are inserted into the support frames 19 provided on both sides of the frame 3 in the direction shown in FIG. At this time, since the middle leg 31 of the core piece 4 is inserted into the core coil hole 8 and the core insertion hole 10a of the board coil 2,
The substrate coil 2 does not come off the frame 3 after the core 4 is inserted. Further, in order to fix the core piece 4 inserted into the support frame 19, the clamp 5 is attached to the support frame 19 in the direction shown in FIG. At this time, the locking holes 33 provided in the clamp 5 and the locking pieces 30 provided in the support frame 19 are engaged.

The transformer 1 thus assembled
The pin 27 provided on the frame 3 is inserted into a hole 26a provided on the circuit board 25, and the pin 27 and the hole 26a
And is fixed to the circuit board 25 by friction with the circuit board 25. The conductor lead-out portion 14 is also inserted into a hole 26b provided in the circuit board 25 in the same manner as the pin 27. The inserted conductor lead-out portion 14 is connected to a predetermined circuit of the circuit board 25 by soldering a part of the circuit pattern, abutting the conductor portions, or the like.

In the assembling method of this embodiment, the frame 3
After all components are mounted on the circuit board 2
5, the components are not limited to this method, and the components such as the substrate coil 2 and the core piece 4 can be mounted on the frame 3 after the frame 3 is mounted on the circuit board 25.

Finally, the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications and improvements can be made within the scope described in the claims. In addition to the primary winding, an auxiliary power supply winding and a control winding can be wound on the bobbin portion 18 provided in the bobbin portion 18.
It is possible to vary the width of 9 in various ways according to the application of the winding. Further, in addition to the transformer in the above embodiment, the inductance component of the present invention can be applied to a choke coil, a saturable reactor, a noise filter, and the like.

[0041]

As described above, according to the present invention,
Combines the advantages of a transformer with a coil with a conductive wire wound on a bobbin and the advantages of a transformer with a thin coil using a substrate, etc., and flexibly supports large-capacity input power and a wide variety of output power An inductance component that can be realized is realized.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of an inductance component of the present invention.

FIG. 2 is an exploded perspective view showing the structure of one embodiment of the present invention.

FIG. 3A is a perspective view of a frame used in the present embodiment as viewed from below, and FIG. 3B is a perspective view of a circuit board on which the transformer of the present embodiment is mounted. FIG.

FIG. 4 is a sectional view taken along line AA ′ showing the structure of the frame body in FIG. 1;

FIG. 5 (a) is a front view of a substrate coil used in the present embodiment, and FIG. 5 (b) is its BB 'line.
It is a line sectional view.

FIG. 6A is a front view of a sheet coil which is another embodiment of the second coil used in the present embodiment, and FIG. It is a line sectional view.

FIG. 7 is a perspective view of a flat coil as another embodiment of the second coil used in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transformer 2 Substrate coil 2a Sheet coil 2b Plate coil 3 Frame 4 Core piece 5 Clamp 6 Conductor 8 Conductor coil part 9 Thin layer substrate 10a Core insertion hole (coil) 10b Core insertion hole (frame) 11 Conductive pattern 12a Winding Part (substrate coil) 12b Winding part (sheet coil) 13 Projection part 14 Conductor lead-out part 14a, 14b Connection terminal 15 Insulating sheet 16 Flat plate bobbin 17 Coil mounting part 18 Bobbin part 19 Support frame 20 Engagement frame 21 Bottom plate 22 Side plate 23 Coil guide projection 24 Insertion hole 25 Circuit board 26a Hole (for pin) 26b Hole (for lead-out part) 27 Pin 28 Flange part 29 Clamp guide protrusion 30 Locking piece 31 Middle foot 32 Outer foot 33 Lock hole 34 Conductor wire fixing member 35 grooves

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H01F 31/00 HAG

Claims (12)

[Claims] At least one first coil formed by winding a conductive wire and at least one unitized second coil for insulatingly transmitting electric energy between the first coil and the first coil. A coil body, a frame body having a coil mounting portion to which the second coil can be detachably mounted, and a core inserted through the first coil and the second coil; Wherein said coil is wound around said frame. 2. The inductance component according to claim 1, wherein the second coil is a substrate coil having a conductive pattern formed in a spiral shape on a substrate. 3. The inductance component according to claim 1, wherein the second coil is a sheet coil formed by molding a conductive metal material into a sheet shape and applying a coating of an insulating material. 4. The coil mounting section is configured such that when the second coil is mounted, the second coil and its core insertion hole are held in a state of being positioned with respect to the frame. 4. The inductance component according to claim 1, further comprising a holding unit that performs the operation. 5. When the second coil is mounted on the coil mounting portion, a conductor lead-out portion provided on a peripheral portion of the second coil is inserted into an insertion hole provided on the coil mounting portion. The inductance component according to any one of claims 1 to 4, wherein the inductance component is inserted and positioned. 6. A pin is provided on the frame, and when the inductance component is mounted on a circuit board, the pin is inserted into a hole provided on a circuit board or the like to which the inductance component is mounted. The inductance component according to claim 4, wherein the frame is fixed to the circuit board by means of a frame. 7. The frame according to claim 1, further comprising a pair of clamps, each of which is detachably attached to said frame body, for fixing said core to said frame body. Inductance components. 8. The inductance component according to claim 1, wherein the first coil is wound around a bobbin formed integrally with the frame. 9. The frame body has a coil mounting portion on which the second coil is mounted, and a bobbin portion on which the first coil is wound, wherein the coil mounting portion, the bobbin portion, The inductance component according to claim 1, wherein the component is detachably configured. 10. The inductance component according to claim 1, wherein the frame has an electromagnetic shield layer. 11. The inductance component according to claim 1, wherein the frame is formed of a highly heat conductive material. 12. The method according to claim 12, wherein the inductance component is a transformer, the first coil is a primary winding of the transformer, and the second coil is a secondary winding of the transformer. The inductance component according to any one of claims 1 to 11, wherein: