JPH0538842U - Barbed terminal structure of coil parts - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To prevent unnecessary bending of lead terminals that are soldered to the mounting board during coiling of coil parts, and to achieve good soldering to the mounting board. [Structure] From a base portion 27 supporting a winding frame body 25 around which a winding of a coil bobbin 21 is wound to a plurality of lead terminals 3
2, 33, 34, and 35 are provided so as to project in a straight line, and the ends of the winding wire 24 have the first lead terminal 33 and the second lead terminal 3 respectively.
2 and the lead terminals 32 and 35 to be soldered to the mounting board so as to be entangled with both the third lead terminal 35 and the fourth lead terminal 34, and the tension at the time of winding cutting is directly applied. Of the plurality of lead terminals 32 and 35, the tips of the first and fourth lead terminals 33 and 34 from which the outermost ends of the windings are twisted are more than the tips of the other lead terminals. Since the structure is located above, the lead terminals 33, 34 can be removed during the tangling process.
Even if is bent, the lead terminals 32 and 35 to be soldered do not fall below.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a barbed terminal structure of a coil component such as a transformer, a choke coil or a noise filter mounted on an electronic circuit board.

[0002]

[Prior Art]

 In recent years, there has been a strong demand for miniaturization of electronic devices and the like, and accordingly, coil components such as transformers, choke coils, and noise filters mounted on and mounted on electronic circuit boards incorporated in the electronic devices have also been miniaturized.

Generally, a coil component is configured by fitting a magnetic core made of a magnetic material or the like on a coil bobbin and further fixing it with a fixture or the like. The terminal structure was made by winding the winding directly on the lead terminals with an automatic winding machine and then cutting the winding. The structure of the conventional coil component will be described in detail with reference to FIGS. 3 and 4.

In FIG. 3, the coil bobbin 1 is formed by molding a synthetic resin or the like with a mold or the like. That is, a winding portion 4 around which a winding wire such as an enameled wire is wound is provided on the outer peripheral portion of the winding frame body having a quadrangular prism shape, and has an E-shaped shape inside, for example. The insertion hole 3 into which the central magnetic leg of the core is inserted is formed so as to penetrate therethrough.

A first fitting frame 5 and a second fitting frame 6 are provided in front of and behind the winding portion 4 so as to sandwich the winding portion 4, and have a substantially pincushion shape. Is forming.

At this time, the fitting insertion hole 3 is also formed in the first fitting frame 5 and the second fitting frame 6 by, for example, integrally molding the coil bobbin 1.

Further, the first fitting frame 5 and the second fitting frame 6 are provided with a first base 7 on the front side and a second base 8 on the rear side, respectively. On the side surface 9 of the base 7 in the direction of the fitting hole, lead terminals 12 to 15 are linearly projected at a position parallel to the fitting hole 3 at right angles to the side surface.

In addition, the lead terminals 12 to 15 are formed so that the tip end portion is bent to the position of the bottom surface of the coil bobbin in an S-shape from the entanglement treatment portion so as to come into contact with the substrate during mounting.

Similarly, lead terminals are also provided on the rear side surface 10 of the second base 8 in a protruding manner, and the tip end portion is bent and formed from the bending treatment portion.

The winding process of the winding 2 with respect to the lead terminals 12 and 15 is performed by first bending the end of the winding wound from the capillary of the automatic winding machine to the winding shaft of the automatic winding machine, and then fixing it. After cutting in the vicinity of the lead terminal 12 by repeatedly bending and pulling the winding on the side fixed to the first lead terminal 12 and further fixed to the twisting shaft (see FIG. 4), the kerf 16 Through to the winding portion 4 of the coil bobbin, and is wound around the winding frame body. Next, after being twisted to the second lead terminal 15 through another kerf 17, it is again fastened to the twisting shaft of the automatic winding machine, and winding between the twisting shaft and the second lead terminal 15 is performed. It is generally performed by the procedure of repeatedly bending and pulling to cut. At this time, the lead terminals 13 and 14 are unused lead terminals that are not used.

[0011]

[Problems to be solved by the device]

 However, since the bending strength of the lead terminal is weak in the conventional bending treatment of the bending terminal structure shown in FIGS. 3 and 4, the winding applied to the lead terminal by the automatic winding machine during the winding bending treatment Among the influences of tension, especially when the winding between the shaft and the first lead terminal 12 is cut at the beginning of the twisting process, and after the wire is wound around the winding frame body and twisted to the second lead terminal 15. In the final winding process, the strongest tension is applied to the lead terminal when the winding between the cord shaft and the lead terminal 15 of the automatic winding machine is applied. This is the main cause of unwanted bending of terminals.

[0012] Therefore, when the bending treatment portion of the lead terminal causes unnecessary bending due to the winding tension, the positions of the lead terminal soldering portion and the board conductor portion are displaced, and the mounting substrate However, there is a problem that soldering failure occurs.

The present invention has been made in view of the above circumstances, and prevents unnecessary bending of a lead terminal due to winding tension when winding is cut during coiling of a coil component, so that a lead board is mounted on the mounting board. The present invention provides a barbed terminal structure for a coil component that makes soldering good.

[0014]

[Means for Solving the Problems]

 The present invention relates to a barbed terminal structure of a coil component in which a plurality of lead terminals are projected in a straight line from a base portion supporting a winding frame body around which the winding is wound, and each end of the winding is A part is twisted to at least a plurality of lead terminals, and the tip of the lead terminal on which the winding end of the plurality of lead terminals is twisted is located above the tips of the other lead terminals. The above-mentioned purpose is achieved by using the twisted terminal structure of the coil component.

[0015]

[Action]

 In the present invention, during the twisting process, first, after twisting the first lead terminal, the winding is cut between the twisting shaft of the automatic winding machine and the first lead terminal, and then the first lead terminal is cut. Since it is entangled in the second lead terminal, the winding tension when the winding is cut is not directly applied to the second lead terminal. In addition, after winding on the bobbin main body, it is twisted on the third lead terminal, further twisted on the fourth lead terminal, and then again fixed on the twisting shaft of the automatic winding machine to fix it on the fourth lead terminal. Since the winding terminal structure consists of cutting the winding between the lead terminal and the winding shaft, the winding tension at the time of cutting the winding is absorbed by the fourth lead terminal and directly connected to the third lead terminal. Do not join.

Therefore, when the automatic winding machine performs the twisting treatment, the winding tension of the automatic winding machine is not directly applied to the second and third lead terminals to be soldered to the mounting substrate. There is no unwanted bending in the lead terminals.

Further, since the tips of the first and fourth lead terminals from which the outermost ends of the windings are twisted are located above the tips of the other lead terminals, the winding shaft of the automatic winding machine is When the lead terminal is bent by winding tension when the winding is cut between the first and fourth lead terminals, the second and third lead terminals are soldered to the mounting board. It does not go below the soldered part.

As a result of the above, the soldering of the coil component to the mounting board becomes good.

[0019]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a state of a coil component according to the present invention after a winding process, and FIG. 2 is an enlarged perspective view showing a state of a lead terminal of the embodiment after the winding process.

In the coil bobbin 21 according to the present embodiment, a plurality of lead terminals 32, 33, 34, 35 are provided in a straight line from a base portion 27 supporting a winding frame main body around which a winding is wound, and are wound. The end of the wire 2 is entangled with both the first lead terminal 33 and the second lead terminal 32, and both the third lead terminal 35 and the fourth lead terminal 34, and Of the lead terminals, the tips of the first and fourth lead terminals from which the winding end portions of the lead terminals are twisted are located above the tips of the other lead terminals. (The rear base portion 28 side has the same structure, and the description thereof will be omitted.) The coil bobbin 21 is made of phenol resin or the like, and is integrally formed by molding the synthetic resin with a mold or the like. ing.

The coil bobbin 21 has a quadrangular prism-shaped winding frame main body provided with a winding portion 24 around which an enameled wire or the like is wound, and a central magnetic leg of a core having an E shape is provided inside. A fitting insertion hole 23 to be fitted is formed so as to penetrate therethrough.

A first fitting frame 25 and a second fitting frame 26 are provided in front of and behind the bobbin main body so as to sandwich the bobbin main body, respectively. The first fitting frame 25 and the second fitting frame 26 form a substantially bobbin shape.

At this time, the fitting insertion hole 23 is also formed in the first fitting frame 25 and the second fitting frame 26 by integrally molding the substantially bobbin shape.

Further, the first fitting frame 25 and the second fitting frame 26 are provided with a first base 27 on the front side and a second base 28 on the rear side, respectively.

On the bottom surface of the bases 27 and 28, cut grooves (for example, 36 and 37 in FIG. 1) for leading the winding between the reel body and the lead terminals are provided between the lead terminals. .

In the first base 27, lead terminals 32, 33, 34, and 35 are provided on a front side surface 29 perpendicular to the direction of the fitting hole 23 so as to project in a horizontal straight line. The terminals 32 and 35 are bent and formed in an S shape so as to come into contact with the board conductor portion when mounted on the board. The other second base 28 has the same structure.

Next, the barking process in the barking terminal structure of the present invention will be described in detail with reference to the enlarged perspective view showing the state of the lead terminals after the barking process in FIG.

First, after the end of the winding wire fed from the capillary of the automatic winding machine is fixed to the twisting shaft of the automatic winding machine, the first lead terminal 33 is twisted and then the winding shaft is fixed. The winding on the fixed side is repeatedly bent and pulled to cut in the vicinity of the first lead terminal 33. Next, after being twisted to the second lead terminal 32, it is wound around the winding frame body through the cut groove 36, twisted to the third lead terminal 35 through another cut groove 37, and then to the fourth lead terminal 34. Squeeze. Next, the wire is fixed to the twisting shaft of the automatic winding machine again, and then the winding on the side fixed to the twisting shaft is repeatedly bent and pulled to cut in the vicinity of the fourth lead terminal.

In the tangling terminal structure including the above tangling treatment, the winding tension of the automatic winding machine is not directly applied to the second and third lead terminals to be soldered to the mounting substrate, so that the lead terminals are unnecessary. Bending is prevented, and as a result, the positional accuracy of the lead terminals during solder mounting is improved.

Further, since the tip ends of the first and fourth lead terminals 33 and 34 whose outermost ends are twisted are located above the tip ends of the other lead terminals 32 and 35, the automatic winding When the winding between the caulking shaft of the machine and the first and fourth lead terminals is cut, even if the lead terminals are bent due to winding tension, the lead terminals are soldered to the mounting board. It does not go below the soldered portion of the lead terminal 3 of FIG.

As a result of the above, soldering of the coil component to the mounting board becomes good.

Note that the first and fourth lead terminals may be additionally provided especially as those relating to the present invention, and in general, there are lead terminals that are not used in coil components in many cases. The empty lead terminals may be used as the first and fourth lead terminals in this embodiment.

[0034]

[Effect of the device]

 Since the barbed terminal structure of the coil component according to the present invention is configured as described above, unnecessary bending of the lead terminals during the barking process is prevented, and soldering during board mounting due to the bent of the lead terminals is prevented. It has an excellent effect of preventing sticking defects.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state of a coil component according to the present invention after a winding stripping process.

FIG. 2 is an enlarged perspective view showing a state after a curling process in the embodiment.

FIG. 3 is a perspective view showing a state of a conventional coil component after a winding stripping process.

FIG. 4 is an enlarged perspective view showing a conventional twisted terminal structure.

[Explanation of symbols]

 1 Coil bobbin 2 Winding 3 Fitting hole 4 Winding part 5 1st fitting frame 6 2nd fitting frame 7 1st base 8 2nd base 9 Side surface of the 1st base in the fitting hole direction 10 2nd Side surface of the base in the direction of fitting and inserting hole 12 First lead terminal 13 Empty lead terminal 14 Empty lead terminal 15 Second lead terminal 16-17 Cut groove 12 'Lead terminal at normal position 21 Coil bobbin 23 Fitting hole 24 winding Line part 25 1st fitting frame 26 2nd fitting frame 27 1st base 28 2nd base 29 Side surface of the 1st base in the direction of a fitting hole 30 Side surface of the 2nd base in the direction of a fitting hole 32 2 lead terminal 33 1st lead terminal 34 4th lead terminal 35 3rd lead terminal 36, 37 Cut groove 38, 39 Winding cut end part

Claims (1)

[Scope of utility model registration request] 1. A barb terminal structure of a coil component having a plurality of lead terminals projecting in a straight line from a base portion supporting a winding frame body around which the winding is wound, and each end portion of the winding. Is twisted to at least a plurality of lead terminals, and the tip of the lead terminal from which the winding end of the plurality of lead terminals is twisted is positioned above the tips of other lead terminals. The barbed terminal structure of the characteristic coil component.