JP3009074U - Inductance element - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inductance element that enables automatic winding of a winding even in a small toroidal core and can reduce manufacturing cost. [Structure] A plurality of L-shaped terminals are arranged in a substantially radial pattern on a terminal block, one end of the terminal is projected as a carrage part on the upper surface of the terminal block, and the other end is mounted on a lower surface of the terminal block in a horizontal state The windings wound around the toroidal core are formed by multiple windings, and the leads of the windings are entangled in the colored portion and soldered to form multiple windings in series. Connected. The plurality of windings are connected in series, for example, by connecting the mounting portion with the pattern of the printed board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an inductance element having a coil in which a winding is wound around a toroidal core and used by being mounted on the surface of a printed circuit board, for example.

[0002]

[Prior art]

 Conventionally, an inductance element using a toroidal core has been used as an inductance element such as a transformer or a choke coil used in a power supply device and a communication device. The winding of the winding around the toroidal core in this inductance element is performed as shown in FIG. That is, the toroidal core 22 is positioned in the vicinity of the substantially circular winding machine head 21 (A), the connecting portion 21a of the winding machine head 21 is displaced, and the winding machine head 21 is placed in the hole 22a of the toroidal core 22. Insert (B).

Then, the connecting portion 21a of the winding machine head 21 is returned to its original shape to form a circular shape, the winding 23 made of copper wire is set on the winding machine head 21, and the winding machine head 21 is rotated. The winding wire 23 is wound around the winding machine head 21 (C). After that, the winding machine head 21 is rotated and the toroidal core 22 is rotated, and the winding wire 23 wound around the winding machine head 21 is wound around the toroidal core 22 (D). When the winding of the winding wire 23 is completed, the connecting portion 21a of the winding machine head 21 is displaced and removed from the toroidal core 22. As a result, the coil 24 is completed (E), and the coil 24 is housed and fixed in a terminal block (not shown) to manufacture an inductance element.

[0004]

[Problems to be solved by the device]

 However, in the case of this inductance element, when the toroidal core is small, there is a problem that the automatic winding of the winding is difficult and the manufacturing cost increases. That is, for example, in the case of a small toroidal core 22 having an outer diameter of 10 mm or less, the inner diameter of the core 22 becomes very small, and the winding machine head 21 must be thin, and the storage of the winding wire 23 is required. The dose also decreases. Therefore, when the winding 23 wound around the small toroidal core 22 has a relatively long length, automatic winding by such a winding machine head 21 cannot be performed, and the winding is performed manually. Is the actual situation. As a result, the manufacturing cost of the inductance element increases.

The present invention has been made in view of the above circumstances, and an object thereof is to enable automatic winding of a winding even for a small-sized toroidal core and reduce the manufacturing cost. , To provide an inductance element.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the inductance element according to claim 1 is an inductance element having a coil in which a winding is wound around a toroidal core and a terminal block in which the coil is housed. A plurality of terminals are arranged in a substantially radial pattern, one end of the terminal is used as a carrage part to project on the upper surface of the terminal block, and the other end is used as a mounting part to be positioned horizontally on the lower surface of the terminal block. Is formed by a plurality of windings, the winding leads are entwined with the carrage part to be electrically connected, and the plurality of windings are connected in series.

According to a second aspect of the present invention, the inductance element is characterized in that the terminal block has at least three side surfaces, and the terminals are respectively arranged on the side surfaces. In addition, in the inductance element according to claim 5, the windings are entangled in the color part and soldered, and at the same time, the mounting portions of the terminals are electrically connected by the pattern of the printed circuit board so that the plurality of windings are connected in series. It is characterized by connecting. Further, the inductance element according to a fourth aspect is characterized in that the coloration part is molded with resin.

[0008]

[Action]

 First, according to the inductance element of claim 1, in the terminal having the L-shaped bent to form the carrage part and the mounting part, the carrage part protrudes on the upper surface of the terminal block, and the mounting part is the lower surface of the terminal block. The terminals are arranged substantially radially so as to be positioned horizontally. A plurality of windings wound around the toroidal core are connected in series by their leads being entangled in the carragee portion on the upper surface of the terminal block and being soldered, for example. As a result, the number of turns of each winding can be reduced, and automatic winding is possible.

In the inductance element according to a second aspect of the present invention, the terminal block is formed in, for example, a triangular shape or a square shape, and L-shaped terminals are arranged on at least three side surfaces of the terminal block, and the terminal is provided with a carragee portion. Connect multiple windings in series. Further, in the inductance element according to the third aspect of the invention, the mounting portion of each of the carragee portions to which the leads of the windings are connected is made conductive by the pattern of the printed circuit board on which the inductance element is mounted, and, for example, a plurality of windings are provided. Connect to one winding in series. In addition, the inductance element according to claim 4 can be formed into a flat upper surface of the terminal block by resin-molding the terminal block so as to cover the color portion, and can be sucked by, for example, an automatic machine to obtain a printed circuit board. It is possible to automatically mount to

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show a first embodiment of an inductance element according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a sectional view thereof, and FIG. 3 is an example of a wiring diagram thereof. In FIG. 1 and FIG. 2, the inductance element 1 is a coil 4 in which a winding 3 is wound around a toroidal core 2, a terminal block 5 for accommodating the coil 4, and an example embedded in the terminal block 5. For example, it has ten terminals 6.

The coil 4 has nine windings 3a to 3i (see FIG. 3) wound around a toroidal core 2 having an outer diameter of about 10 mm, for example. The coil 4 is housed in the coil housing portion 7 of the terminal block 5, and is fixed by, for example, an adhesive agent not shown. Ten terminals 6 are radially embedded in the outer peripheral wall of the terminal block 5. The terminal 6 is bent into an L shape and has vertical carrage portions 8a to 8j and horizontal mounting portions 9a to 9j (see 9h to 9j in FIG. 3).

Each terminal 6 is integrally embedded in the terminal block 5 by insert molding when the terminal block 5 is molded, and the tips of the carrage portions 8a to 8j have a predetermined length from the upper surface 5a of the terminal block 5. The projecting parts 9a to 9j are arranged on the lower surface 5b of the terminal block 5 so as to project outward in the horizontal state. The leads 10 of the windings 3a to 3i are electrically connected, for example, by soldering, to the salient parts 8a to 8j of the terminal 6.

At this time, the adjacent leads 10 of the two adjacent windings are connected to one color portion, that is, for example, as shown in FIG. 3, one lead 10a of the winding 3a and one of the windings 3b. The other lead 10b is soldered together with the color part 8a. The other windings 3b to 3i are also connected in the same manner, so that the nine windings 3a to 3i are connected in series via the carrage parts 8a to 8j as shown in the connection diagram of FIG. Thus, one winding 3 is formed between the mounting parts 9a and 9j. The leads 10 of the windings 3a to 3i are not limited to soldering by connecting to the lead portions 8a to 8i, but may be connected by ultrasonic welding or laser welding.

In the inductance element 1, first, the nine windings 3 a to 3 i are wound around the toroidal core 2 to form the coil 4. At this time, since the length of the nine windings 3a to 3i can be shortened, even the thin winding machine head 21 (see FIG. 12) can be sufficiently automatically wound. The coil 4 is housed in the coil housing portion 7 of the terminal block 5 in which the terminals 6 are embedded in advance, and is fixed with an adhesive (not shown). At this time, the leads 10 of the windings 3a to 3i are led out to the outside by a predetermined length.

Then, the leads 10 of the windings 3a to 3i are soldered to the salient portions 8a to 8j as described above, so that the nine windings 3a to 3i are connected in series and the toroidal core 2 is connected. The inductance element 1 in which one winding 3 is wound is obtained. In the inductance element 1, the mounting portions 9a and 9j are placed on a pattern 12 to which a predetermined circuit is connected, for example, on a printed circuit board 11 (see FIG. 2) to which reflow solder is applied. The printed circuit board 11 is set in a reflow soldering device (not shown), and the mounting parts 9a and 9j are soldered to the pattern 12. As a result, the inductance element 1 is mounted on the printed board 11. The mounting portions 9b to 9i are placed on the pattern 12 to which no circuit is connected and soldered.

As described above, in the above-described embodiment, the winding 3 wound around the toroidal core 2 is divided into a plurality of windings 3a to 3i and wound, and each lead 10 of the windings 3a to 3i is wound. Since the windings 3 are connected in series via the carragee units 8a to 8j to obtain one winding 3, the number of turns of the individual windings 3a to 3i can be reduced, and the automatic winding of the windings 3a to 3i can be performed. It will be possible. This makes it possible to automatically wind the winding 3 on a small toroidal core 2 having an outer diameter of 10 mm or less, which has been impossible in the past, and does not require manual winding. The manufacturing cost can be significantly reduced.

Further, each terminal 6 is bent into an L-shape to form the carrage parts 8 a to 8 j and the mounting parts 9 a to 9 j, and the vertical carrage parts 8 a to 8 j are embedded in the terminal block 5. Therefore, heat transfer between the carragee portions 8a to 8j and the mounting portions 9a to 9j is prevented. That is, when the leads 10 of the windings 3a to 3i are soldered to the salient portions 8a to 8j, the solder is prevented from adhering to the mounting portions 9a to 9j by the terminal block 5, and the mounting portions 9a to 9j. The decrease in flatness of 9j is prevented.

Further, when the inductance element 1 is soldered to the pattern 12 of the printed circuit board 11, the heat thereof is also prevented from being transferred to the coloration parts 8a to 8j, and each lead 10 is transferred from the charge parts 8a to 8j. Continuity failure such as disconnection is also prevented. As a result, the inductance element 1 of stable quality can be obtained, and the inductance element 1 can be mounted on the printed board 11 reliably and stably. Furthermore, by mounting the mounting portions 9b to 9i which are not connected to the circuit to the pattern 12 of the printed circuit board 11 to which the circuit is not connected, the inductance element 1 is mounted on the printed circuit board 11 more reliably and firmly. be able to.

FIG. 4 shows a modified example of the above embodiment, in which each of the terminals 6 is covered with resin to mold the carrage portions 8a to 8j. That is, the coil 4 around which the windings 3a to 3i are wound is housed in the coil housing portion 7 of the terminal block 5, and the inside of the coil housing 7 and the upper surface of the terminal block 5 are molded with the resin 13. With this structure, the coil 4 can be securely housed and fixed in the terminal block 5, and the upper surface 1a of the inductance element 1 can be formed flat, so that it can be sucked by a suction plate of an automatic machine (not shown). As a result, the inductance element 1 can be automatically mounted on the printed circuit board 11, and the manufacturing line of the inductance element 1 can be labor-saving.

5 and 6 show a second embodiment of the inductance element 1 according to the present invention, FIG. 5 is a perspective view thereof, and FIG. 6 is an example of a wiring diagram thereof. The same parts as those in the first embodiment will be described with the same reference numerals. The same applies to each of the following examples. In this embodiment, the five windings 3a to 3e (see FIG. 6) wound around the toroidal core 2 are electrically connected by the pattern 12 of the printed circuit board 11.

That is, the leads 10 at both ends of the windings 3a to 3e are soldered to the coloration parts 8a to 8j, respectively, and the mounting parts 9a to 9j of the inductance element 1 are formed on a printed circuit board formed in advance in a predetermined shape. It is placed on the pattern 12 of 11 and soldered. Thereby, for example, as shown in FIG. 6, the mounting portions 9b and 9c are connected by the pattern 12a, the mounting portions 9d and 9e are connected by the pattern 12b, and one winding 3A is formed between the mounting portions 9a and 9f. It Further, the mounting portions 9h and 9i are connected by the pattern 12c (see FIG. 6), and another winding 3B is formed between the mounting portions 9g and 9j. Thereby, for example, a transformer having the winding 3A as the primary winding and the winding 3B as the secondary winding is formed.

Even with this configuration, in addition to the same effects as the above-described embodiment, the windings 3a to 3e can be connected simply by mounting the inductance element 1 on the printed board 11. It also has the effect of facilitating connection work (carrying work and soldering work). In this embodiment, if the mounting portions 9f and 9g are connected by a pattern (not shown), the five windings 3a to 3e are all connected in series to form the inductance element 1 having one winding 3. Will be obtained.

7 and 8 show a third embodiment of the inductance element 1 according to the present invention, FIG. 7 is a perspective view thereof, and FIG. 8 is an example of a wiring diagram thereof. In this embodiment, the terminal block 5 is formed in a square shape, and 20 L-shaped terminals 6 are embedded in the four side surfaces 5c to 5f. That is, for example, the carrage portions 8a to 8f and 8k to 8p of the six terminals 6 are embedded in the left and right side surfaces 5c and 5e of the terminal block 5, and the front and rear side surfaces 5d and 5f include, for example, the carrage portions of the four terminals 6. The portions 8g to 8j and 8q to 8t are embedded.

Then, the leads 10 of the plurality of windings 3 a to 3 l (see FIG. 8) wound around the toroidal core 2 are appropriately soldered to the salient portions 8 a to 8 t of each terminal 6. Thereby, for example, the inductance element 1 including the transformer having the four windings 3A to 3D as shown in the connection diagram of FIG. 8 is obtained. Even with such a configuration, it is clear that the same operational effects as those of the above-mentioned respective embodiments can be obtained. In this embodiment, among the plurality of terminals 6, for example, the terminals 6 of the carrage parts 8c, 8j, 8n and 8s are vacant terminals.

FIG. 9 shows a modified example of the third embodiment, in which the terminal block 5 is formed in a triangular shape, and the three side surfaces 5c to 5e have the L-shaped 13 terminals 6 having different parts. 8a to 8m are buried respectively. Also in this embodiment, the same effect as that of the third embodiment can be obtained. As a modification of the third embodiment, it is of course possible to form the terminal block 5 into a polygonal shape such as a pentagonal shape or a hexagonal shape.

10 and 11 show a fourth embodiment of the inductance element 1 according to the present invention, FIG. 10 is a perspective view thereof, and FIG. 11 is an example of a wiring diagram thereof. In this embodiment, the terminal block 5 is formed in a square shape and 16 L-shaped terminals 6 embedded in the four side surfaces 5c to 5f are mounted 9a to 9p (9i to 9p are shown in FIG. 11). ) Is electrically connected with the pattern 12 of the printed board 11 as in the second embodiment.

That is, as shown in FIG. 11, for example, the mounting portions 9b and 9c are electrically connected by the pattern 12a, and the mounting portions 9f and 9g are electrically connected by the pattern 12b. Further, the mounting portions 9j, 9k and 9n, 9o are made conductive by the patterns 12c, 12d, respectively. As a result, the windings 3a to 3d are connected in series to form the winding 3A between the mounting portions 9a and 9h, and the windings 3e to 3h are connected in series and are wound between the mounting portions 9j and 9p. The line 3B is formed, and the inductance element 1 including the transformer having the two windings 3A and 3B is obtained. It is apparent that the same effects as those of the above-mentioned respective embodiments can be obtained also in this embodiment.

The wiring diagrams shown in the above embodiments are merely examples, and various winding structures can be adopted according to the circuit in which the inductance element is to be mounted. Further, the number of pins, the number of windings, the shape of the terminal block, the method of connecting the leads of each winding to the jellyfish part, etc. in the above embodiment are also examples, and various changes may be made without departing from the gist of the present invention. It goes without saying that it is possible.

[0029]

[Effect of device]

 As described above in detail, in the inductance element of the present invention, even if the toroidal core is small, the winding can be automatically wound, and the manufacturing cost can be reduced. And so on.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an inductance element according to the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a connection diagram showing an example of the connection.

FIG. 4 is a sectional view showing a modification thereof.

FIG. 5 is a perspective view showing a second embodiment of the inductance element according to the present invention.

FIG. 6 is a connection part showing an example of the connection.

FIG. 7 is a perspective view showing an inductance element according to a third embodiment of the present invention.

FIG. 8 is a connection diagram showing an example of the connection.

FIG. 9 is a perspective view showing a modification thereof.

FIG. 10 is a perspective view showing an inductance element according to a fourth embodiment of the present invention.

FIG. 11 is a connection diagram showing an example of the connection.

FIG. 12 is a schematic process diagram of a method of winding a winding on a conventional toroidal core.

[Explanation of symbols]

 1 Inductance element 2 Toroidal core 3 3a to 3h 3A to 3D Winding 4 ... Coil 5 ... Terminal block 5a ... Upper surface 5b ..... lower surface 5c to 5f ..... side surface 6 ........... terminal 7・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Coil storage part 8a ～ 8t ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Carrage part 9a〜9t ・ ・ ・ ・ ・ ・ ・ ・ Mounting part 10 ... Lead 11 Printed circuit board 12, 12a to 12d Pattern 13 ··········resin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Tetsuya Suzuki 5-11-3 Shimbashi, Minato-ku, Tokyo Fuji Electric Chemical Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. An inductance element (1) having a coil (4) having a winding (3) wound around a toroidal core (2) and a terminal block (5) in which the coil is housed.
A plurality of L-shaped terminals (6) are arranged in a substantially radial pattern on the terminal block, one end of the terminal is projected as a carrage part (8a to 8t) onto the upper surface (5a) of the terminal block, and the other end is projected. Mounting part (9a
.About.9t) is horizontally positioned on the lower surface (5b) of the terminal block, and the winding is formed by a plurality of windings (3a to 3h), and the lead (10) of the winding is connected to the carrage part. Inductance element characterized in that a plurality of windings are connected in series by electrically connecting them. 2. The terminal block (5) according to claim 1, wherein the terminal block (5) has at least three side surfaces (5c to 5f), and the terminals (6) are respectively arranged on the side surfaces. Inductance element. 3. The windings (3a to 3h) are entangled and soldered to the carrage (8a to 8t), and the mounting portions (9a to 9t) of the terminals are connected to the printed circuit board (11). The inductance element according to claim 1 or 2, wherein the plurality of windings are connected in series by making the patterns (12a to 12d) conductive. 4. The inductance element according to claim 1, 2 or 3, characterized in that the carrage portion (8a to 8t) is molded with resin.