JPH0982529A - Coil element and assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the hardness of work for connecting a coil end around a toroidal core with a terminal on a terminal board. SOLUTION: A terminal board 20, on which an annular toroidal core 2 is assembled, has a storing hole 24 for a lower case 28 formed in a body through a joining projected member 26. The lower case 28 with an annular shape in accordance to the core 2 has an annular space 30 on an upper face side thereof for storing the lower half of core 2. An upper case 6 having the same annular space as the lower case 28 is assembled in a way that the upper half of the core 2 is stored in this annular space. In this way, wring is wound around the core 2 between the cases 6 and 28, and both coil ends are connected to a terminal 16 of a terminal board 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding element having a coil as a main element such as a transformer and a noise filter, and an assembling method thereof, and more particularly to a winding element constructed by assembling a toroidal core coil to a terminal block and the winding element. Assembling method

[0002]

2. Description of the Related Art As a winding element having a coil, such as a transformer, a noise filter or a choke coil, which constitutes a circuit in an electronic device such as a power supply device or a communication device, an annular toroidal core is used as a terminal block. Those assembled and configured are known. As shown in FIG.
The toroidal core 2 is housed between the upper case 6 and the lower case 8. Then, as shown in FIG.
A winding wire 10 is wound around the outer circumferences of the two cases 6 and 8 and a lead portion 12 is extended and secured from the winding portion. If the winding element is a transformer,
A multi-phase winding 10 is applied. The toroidal core 2 thus provided with the winding 10 is, as shown in FIG.
The winding 10 is assembled by gluing or the like in the housing portion 14 formed in the terminal block 4, and both ends of the winding 10 are connected to the terminals 16 of the terminal block 4, respectively. The winding element 17 is inverted and mounted with a simple handling such that the flat back surface is the upper surface and the upper surface is sucked by a suction device.

[0003]

However, in the above winding element, the toroidal core 2 provided with the winding 10 is assembled to the terminal block 4, so that the winding 10
In the work of winding and connecting the end of the terminal to the terminal 16 of the terminal block 4, it is necessary to identify which terminal 16 each of the plurality of windings should be connected to before performing the winding work. Because of this, it was difficult to automate using an assembly device, and it was unavoidable to rely on complicated manual work by visual inspection. In particular, when the winding 10 is provided with a plurality of phases such as a transformer, the number of the windings 10 increases, and it becomes very difficult to identify which phase each belongs to. It was necessary to use the colored windings 10 for different colors for each phase so that they could be easily distinguished visually.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce the work of connecting the ends of the windings applied to the toroidal core to the terminals of the terminal block. A winding element and its assembling method are provided.

[0005]

In order to achieve the above-mentioned object, a winding element according to the present invention has a toroidal core housed between an upper case and a lower case and assembled to a terminal block. In the winding element, the lower case and the terminal block are formed integrally with each other, leaving a space vertically passing therethrough, and the core is housed between the lower case and the upper case. A wire is wound around the upper and lower case housing the core through the space between the terminal block and the lower case, and the ends of the winding are connected to the terminals of the terminal block. To do.

By thus forming the lower case of the toroidal core integrally with the terminal block, the toroidal core and the upper case are assembled to the lower case, and the toroidal core is positioned on the terminal block. Since the winding is performed in this state, the work of connecting the ends of the winding can be continuously performed along with the work of winding. This makes it possible to wind the ends of the winding around the terminals of the terminal block in a series of winding operations without having to distinguish which terminal each winding should be connected to, as in the past. As a result, the work of connecting the winding ends becomes easier than in the conventional case. In particular, when a multi-phase winding is applied such as a transformer, the winding work and the winding end connection work can be performed for each phase. It is possible to prevent connection mistakes without coloring.
Further, since the work of assembling the wound toroidal core to the terminal block is not necessary, the assembling work can be simplified.

Further, preferably, the space portion between the lower case and the terminal block is formed as a plurality of arc-shaped space portions, and the winding is provided through the arc-shaped space portions.

Thus, the space required for the winding work can be secured while the lower case is stably supported on the terminal block at a plurality of locations.

More preferably, the upper and lower cases provided with the windings and the lead portions of the windings extending from the upper and lower cases to the terminals are covered with a mold resin. Alternatively, a recess extending along the direction of the opposing terminal is formed on the upper surface of the terminal block, and the upper and lower cases provided with the winding and the upper and lower cases pass through the recess and hang over the terminal. The passed lead portion of the winding is covered with a cover member attached to the recess. This protects the winding of the core and the lead portion of the winding from the outside.
Further, if the outer surface of the winding element is molded into a desired shape with these molding resins or cover members, mounting by simple handling becomes possible.

On the other hand, in order to achieve the above object, in the method of assembling the winding element according to the present invention, the toroidal core is housed between the upper case and the lower case and is assembled to the terminal block having a plurality of terminals. In the method of assembling a winding element, after the core is accommodated between the lower case and the upper case that are integrally formed with the terminal block,
After connecting one end of the winding to the terminal, and applying the winding to the outer circumference of the upper and lower case that accommodates the core through the space that penetrates vertically between the terminal block and the lower case , The other end of the winding is connected to the second terminal of the terminal block.

Thus, the end of the winding can be wound without identifying which terminal each of the plurality of windings should be connected to, as in the conventional case. Connection work becomes easy. Further, in the case of applying a winding of a plurality of phases such as a transformer, the winding work and the connecting work of the winding end portion are simultaneously performed for each phase,
It is possible to prevent connection mistakes without coloring the winding wire as in the conventional case.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a winding element and an assembling method thereof according to the present invention will be described below in detail with reference to the accompanying drawings. The winding element here means a coil such as a transformer, a noise filter, or a choke coil used in electronic devices such as power supply devices and communication devices as main elements,
For example, it is mounted on a printed circuit board. The same components as those of the conventional one are designated by the same reference numerals.

FIG. 1 shows a terminal block 20 and a toroidal core 2.
It is shown by disassembling and. The terminal block 20 is formed of resin into a rectangular parallelepiped shape, and a plurality of metal terminals 16 are provided in a row from the front and rear side surfaces of the terminal block 20, respectively.
Each terminal 16 is formed by projecting horizontally from a side surface of the terminal block 20, being bent obliquely downward from a predetermined portion, and being bent again horizontally at a tip portion connected to a printed circuit board. There is. Also, on the upper surface of the terminal block 20,
A recess 22 is formed along the front-rear direction. A cover member, which will be described later, is attached to the recess 22.

A storage hole 24 having a substantially circular cross section is formed through the central portion of the upper surface of the terminal block 20 so as to communicate with the lower surface. As shown in FIG. 2, the toroidal core 2 is housed in the housing hole 24, and the lower case 28 is integrally made of resin through a coupling protrusion 26 protruding from the inner wall surface. Has been formed. The lower case 28 has an annular shape corresponding to the annular toroidal core 2, and is arranged coaxially with the housing hole 24. The connecting protrusion 26 shown in FIG. 2 is provided at two places between the inner wall surface of the housing hole 24 and the lower case 28, but it may be provided at one other place and it is desired to support the lower case 28 more reliably. In that case, it may be provided in three places.

The annular lower case 28 is shown in FIGS.
As shown in, the annular space 30 is formed on the upper surface side. The toroidal core 2 is inserted into the annular space 30 and the lower half thereof is housed therein. Then, on the upper side of the toroidal core 2 housed in the lower case 28,
As shown in FIG. 1, an upper case 6 having an annular shape corresponding to the toroidal core 2 and having an annular space on the lower surface side is housed in the upper half portion of the toroidal core 2 and is assembled like the lower case 28. . In this way, the toroidal core 2 is housed between the lower case 28 and the upper case 6 to form the annular core portion 31.

The core portion 31 of the terminal block 20 is provided with a winding 32 as shown in FIG. In winding, first, one end of the winding 32 is connected to the predetermined terminal 16a of the terminal block 20.
It is connected to the root part of the machine by being rolled up. Next, the winding 32 to which one end is connected is connected to the recessed portion 2 from the terminal 16a.
It is hung on the inner side of 2, is inserted into the accommodation hole 24, and is wound around the outer periphery of the core portion 31. Here, the winding operation to the core portion 31 is performed by the through portion 34 of the core portion 31 and the core portion 31.
And an arc-shaped space 36 formed between the inner wall of the housing hole 24 and the inner wall of the housing hole 24. Then, as shown in FIG. 4, the winding 32 wound around the core portion 31 is led out from the inside of the housing hole 24 and hung over the inside of the recessed portion 22, and the other end portion thereof is another predetermined terminal 16b. Is unwound and connected. These two winding-wound portions are surely connected by solder later.
Further, if the winding element is one that is provided with a plurality of phases of the winding 32 such as a transformer, as shown in FIG. I,
The ends of the windings 32 are each connected to a predetermined terminal 16.

After the winding is completed, as shown in FIG.
A flat plate-shaped cover member 38 is attached to the recess 22 of the terminal block 20. On both side edges of the cover member 38,
Each of the protrusions 40 is formed so as to project laterally at substantially the center thereof. The two protrusions 40 correspond to the recesses 42 formed in the both side walls inside the recess 22 by forming the storage holes 24 of the terminal block 20, respectively. When the cover member 38 is inserted inside the recess 22,
The four protrusions 40 are fitted in the recesses 42, respectively. When the cover member 28 is attached in this manner, the recess 22
The lead portion 44 of the winding wire 32 laid on the inside of the coil 32 and the winding wire 32 provided on the core portion 31 are covered with a cover member 38 and are protected from the outside, and their disconnection or scratches are prevented. In addition, since the upper surface of the winding element is made flat by mounting the flat plate-shaped cover member 38, the winding element can be easily handled by suction using a suction machine when it is mounted on a substrate or the like. Become. Further, as another protection mode, there is one in which the winding element is resin-molded, and as shown in FIG. 7, only the terminals protrude to the outer surface and the winding of the lead portion 44 or the core portion 31 is prevented. 32 is covered with a mold resin 46 and is protected from the outside similarly to the above. Also here, since the upper surface of the winding element can be formed flat by molding the molding resin 46, simple handling can be performed as described above.

As described above, in the embodiment of the present invention, the lower case 28 of the toroidal core 2 is connected to the terminal block 20.
Since the toroidal core 2 is assembled and positioned with respect to the lower case 28, the winding 32 is applied to the lower case 28, and the end of the winding 32 is attached to the terminal block 20. Since it is connected to the terminal 16, it is not necessary to identify which terminal each of the plurality of windings should be connected to, as in the conventional case, and the work of connecting the winding ends is easier than in the conventional case. . In addition, when a plurality of phases of the winding wire 32 are provided, such as a transformer, the winding work and the connecting work can be performed for each phase, so that the winding wire 32 is not colored as in the conventional case. Connection mistakes can be prevented. Moreover, since the work of assembling the toroidal core 2 having the windings 32 is not necessary, the assembling work can be simplified.

[0019]

As described above in the embodiments of the invention, according to the winding element and the assembling method thereof according to the present invention,
By forming the lower case of the toroidal core integrally with the terminal block, you can connect the ends of the winding in sequence to the winding work, and connect each of the multiple windings to which terminal Since it is not necessary to identify whether or not it should be done, the work of connecting the winding ends can be easily performed, and this connection work can be easily automated by the assembly device. Further, in the case where a winding having a plurality of phases is applied such as a transformer, the winding work and the connecting work of the winding end can be performed for each phase, so that the winding is not colored. Connection mistakes can be easily prevented.
On the other hand, since the work of assembling the toroidal core having the windings is not necessary, the assembling work can be simplified. Therefore,
It is possible to reduce the cost of the winding element,
The quality and reliability of the product can be improved.

When a plurality of arc-shaped space portions are formed between the lower case and the terminal block and winding is provided through the space portions, the lower case is used as the terminal block at a plurality of locations. It is possible to secure the space required for the winding work while stably supporting it.

Further, the winding applied to the toroidal core and the winding lead portion extending from the core to the terminal can be protected from the outside when covered with the molding resin or the cover member. It is possible to prevent wire breakage or scratches. Further, if the outer surface of the winding element is molded into a desired shape with these molding resins or cover members, mounting by simple handling becomes possible.

[Brief description of drawings]

FIG. 1 is a perspective view showing a toroidal core of a winding element according to the present invention in an exploded manner from a terminal block.

FIG. 2 is a top view showing a terminal block of the winding element according to the present invention.

FIG. 3 is a perspective view showing a state where one end of a winding is connected to a terminal of a terminal block and a winding is applied to the outer periphery of a toroidal core.

FIG. 4 is a perspective view showing that a winding for one phase is applied to a toroidal core and both ends of the winding are connected to terminals.

FIG. 5 is a perspective view showing a state in which plural-phase windings are applied.

FIG. 6 is a perspective view showing that a cover member is attached to a terminal block.

FIG. 7 is a perspective view showing a winding element covered with a mold resin.

FIG. 8A is a perspective view showing a toroidal core and two conventional cases for accommodating the core. (B) It is the perspective view which showed the conventional toroidal type core wound.
(C) A perspective view showing a conventional winding element in which a wound toroidal core is assembled to a terminal block.

[Explanation of symbols]

2 Toroidal type core 6 Upper case 16 Terminal 20 Terminal block 22 Recessed portion 24 Storage hole 26 Coupling projecting piece 28 Lower case 30 Annular space 31 Core portion 32 Winding 34 Penetration portion 36 Space portion 38 Cover member 40 Projection portion 42 Recession 44 Lead portion 46 Mold resin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Fujii 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd.

Claims (5)

[Claims] 1. A winding element in which a toroidal core (2) is housed between an upper case (6) and a lower case (28) and is assembled to a terminal block (20). Between the lower case (28) and the upper case (6), a space (36) is formed between the lower case (28) and the terminal block (20) so as to penetrate therethrough in the vertical direction. The core (2) is housed in the terminal block (2
0) and the space (36) between the lower case (28)
The upper and lower cases (6, 6) accommodating the core (2) through
A winding element, characterized in that a winding (32) is applied to the outer periphery of (28) and the end of the winding (32) is connected to the terminal (16) of the terminal block (20). 2. The space portion (36) between the lower case (28) and the terminal block (20) is formed as a plurality of arc-shaped space portions (36), and the arc-shaped space portions (36) are formed. Winding element according to claim 1, characterized in that a winding (32) is provided through 36). 3. The upper and lower cases (6, 28) provided with the windings (32) and the windings (32) hung from the upper and lower cases (6, 28) to the terminals (16). )
The winding element according to claim 1 or 2, wherein the lead portion (44) and the lead portion (44) are covered with a mold resin (46). 4. A recess (2) extending along the direction of the opposing terminals (16, 16) on the upper surface of the terminal block (20).
2) is formed, and the upper and lower case (6, 28) provided with the winding (32) and the upper and lower case (6, 28) through the recess (22) to the terminal (16). The lead member (44) of the wound winding (32) is covered with a cover member (38) attached to the recess (22), according to claim 1 or 2. Winding element. 5. A winding element for mounting a toroidal core (2) between an upper case (6) and a lower case (28) and assembling it on a terminal block (20) having a plurality of terminals (16). In the assembling method, the core (2) is housed between the lower case (28) and the upper case (6) which are integrally formed with the terminal block (20), and then the terminal block (20). ) First end (16a) of the winding (32) is connected to the terminal block (20) and the lower case (2).
8) The winding (32) is formed on the outer circumference of the upper and lower case (6, 28) for accommodating the core (2) through a space (36) penetrating vertically between the winding (32) and A method of assembling a winding element, characterized in that the other end of (32) is connected to the second terminal (16b) of the terminal block (20).