JPH04206706A - coil bobbin - Google Patents

Abstract

PURPOSE:To facilitate a secure and easy magnet wire drawing-out treatment and prevent the wire diameter of the drawn-out wire from being added to the thickness of a main part by a method wherein at lest one protrusion is formed on a winding column. CONSTITUTION:A winding column 29 on which a magnet wire is wound, winding stopper frames 21 and 22 which are provided on both the ends of the winding column 29 and function as winding stopper are provided in a coil bobbin 35. In the coil bobbin 35, at least one protrusion(s) 31 (and 32) are formed on the winding column 29. For instance, the approximately cylindrical first and second protrusions 31 and 32 are provided on the front and rear side walls of the winding column 29. Then, after the starting end of the magnetic wire 40 is attached to the base end of a second pin terminal 28 by wrapping, for instance, the starting end of the magnet wire 40 is guided by a second drawing-out trench 26 and introduced onto the winding column 29 and the magnet wire 40 is wound on the winding column 29 successively until it reaches the first protrusion 31. After that, the first protrusion 31 is used as a winding stopper and also as a bending end and, further, the starting end of the magnet wire 40 is introduced into a first drawing-out trench 25 along the side wall of the winding column 29 as a first drawn-out wire part 36 and attached to a first pin terminal 27 by wrapping.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a coil bobbin configured to have a winding wound therein in order to perform functions such as a transformer, a choke coil, or a noise filter. For details,
The present invention relates to a coil bobbin in which the lead wire processing of the winding can be performed reliably and easily, and the thickness of the lead wire can be avoided from being added to the thickness of the main body during the drawing process.

(Prior Art) In recent years, electronic equipment products have been required to have higher functionality and to be smaller and thinner.In particular, the electronic equipments and the like are used regardless of whether the user is indoors or outdoors. For this reason, there is a strong desire for a thinner device that is suitable for mobile devices.

In order to achieve thinner electronic devices with higher functionality, surface mounting is performed in which electronic components constituting electronic functions are mounted on the surface of a circuit board or the like.

However, the electronic components have a wide variety of uses, including passive components such as resistors, capacitors, and inductors, and active components such as transistors and operational amplifiers.

Among these, inductors are generally constructed by winding wires around a magnetic core made of magnetic material, etc., and occupy a large volume of space compared to other electronic components. It is one of the electronic components for which it is most difficult to reduce the volume of space it occupies, as it may cause magnetic saturation or the like, or it may not be possible to obtain a predetermined inductance value.

Therefore, attempts have been made to ensure the occupied space volume at a predetermined value and to reduce the height in the height direction so as to apply the surface mounting technology.

Incidentally, applications of the above inductor include transformers,
There are choke coils, noise filters, etc., and these are generally constructed by winding a winding around a coil bobbin in advance and inserting a magnetic core into the coil bobbin.

A conventional coil bobbin will be explained with reference to FIG. 14.

The coil bobbin 15 is formed by integrally molding a material such as a synthetic resin using a molding die or the like (not shown).

The shape of the coil bobbin 15 is such that a winding column 9 having a substantially rectangular column shape is provided in the center, and the first winding stop frame 1 and the first winding frame 1 are arranged so as to sandwich the ends of the winding column 9 from both sides. A two-winding retaining frame 2 is provided.

From the bottom of each of the first winding stop frame 1 and the second winding stop frame 2, a first magnetic core mounting base material 3 and a second magnetic core mounting base material 4 are installed on the longitudinal extension of the winding column 9. has been extended.

At the bottom of the first magnetic core mounting base material 3 and the second magnetic core mounting base material 4, when the coil bobbin 15 is integrally molded, a plurality of first
A leader line groove 5 and a second leader line groove 6 are formed.

Furthermore, the first magnetic core mounting base material 3 and the second magnetic core mounting base material 4
From each side, a plurality of first frame terminals 7 and a plurality of second frame terminals are located on the longitudinal extension of the winding column 9 and avoiding the first drawing groove 5 and the second drawing groove 6. Terminals 8 are implanted respectively.

The first frame terminal 7 and the second frame terminal 8 are formed by, for example, molding copper or the like into a substantially rod shape and applying tin plating or the like.

Further, the winding pillar 9 is provided with the first winding stop frame 1 and the second winding stop frame 1.
A magnetic core insertion hole 10 is formed when integrally molded with the winding stopper frame 2, and a magnetic core processed from a magnetic material (not shown) is inserted into the magnetic core insertion hole 10. It has become.

The coil bobbin 15 configured as described above is made of a thin wire made of copper or the like with good conductivity and coated with enamel or the like to insulate it from the outside! 11 is wound several times around the base end of the second frame terminal 8 of the second magnetic core mounting base material 4, for example, with one of the base ends of the second frame terminal 8 as the winding start end (hereinafter referred to as winding the S wire around the frame terminal). This process is called wrapping), and is sequentially wound around the winding column 9 using the second leader line 6 as a guide groove by a wire machine (not shown) or the like.

The winding by the winding machine or the like is started from the second S' wire fixing frame 2 side and is wound on the winding column 9 until a predetermined amount of winding is reached.

After that, @Ili! 11, the winding 11 is generally pulled out along the bottom of the winding part 14 as a pull-out winding part 12 because it is necessary to perform winding end processing at another one of the second frame terminals 8. , the second lead wire groove 6 is used as a guide groove, and the second frame terminal 8 is wrapped around the other base end portion of the second frame terminal 8.

When the winding 11 is wound around the winding column 9 as a winding portion 14 having a predetermined amount of winding, the predetermined number of windings is generally completed halfway through the winding column 9, including multilayer winding. Therefore, when drawing out the draw-out winding part 12, the draw-out winding part 12 is adhered to the winding draw-out part with the fixing tape 13 having one adhesive side, and after the draw-out winding part 12 is fixed, , the second frame terminal 8 is subjected to a wrapping process via the second lead wire groove 6.

Generally, a magnetic core is inserted into the magnetic core insertion hole 10 of the coil bobbin 15, which has been wound as described above, and is fixed with a fixture (not shown) to form an inductor component.

Note that, if necessary, it is also possible to configure a transformer or the like by providing a negative winding, a secondary winding, etc. to the winding column 9.

Further, when winding the winding 11 in multiple layers, for example, the 11th! The starting part of the winding 11 is wound around the winding column 9 from the wire fixing frame 1,
The upper layer is folded over the lower layer by the second winding fixing frame 2.

(Problem to be Solved by the Invention) However, according to the above-mentioned conventional coil bobbin, the end of the winding is drawn out to a terminal etc. after a predetermined amount of winding. It is generally located in the middle of the winding column, and during the drawing process, it is necessary to adhesively fix the end of the winding wire with a fixing tape or the like having an adhesive surface. There is a problem in that complicated steps such as the above are added, and it is difficult to automate the steps using a winding machine or the like.

In addition, the winding end of the conventional coil bobbin is pulled out when the winding is wound halfway, or when the winding is pulled out along the top layer and bottom of the winding section during multilayer winding. , the wire diameter of the lead-out winding is added to the top layer in the thickness direction of the main body, and as a result, it is equivalent to the winding layer thickness of the winding column τ being removed by the lead-out winding diameter. However, there is a problem in that the influence is large, especially when a winding wire having a large wire diameter is used.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to reliably and easily process the leader wire of the winding, and also to add the wire diameter thickness of the leader wire to the main body thickness during the drawing process. To provide a coil bobbin that avoids such problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a winding column around which a winding is wound, and a winding that is provided at the end of the winding column and serves as a winding stop. In the coil bobbin having a wire fixing frame, at least one protrusion is formed on the winding column,
This aims to achieve the above objectives.

(Function) In the present invention, since the coil bobbin is constructed by forming at least one protrusion on the winding column having a winding stop frame provided at the end thereof, which serves as a winding stop, When winding the winding around the winding column of the coil bobbin, the protrusion can be used as a winding stop for the winding.

Further, after a predetermined amount of winding is performed on the winding column, the lead wire at the end of the first winding is bent by the protrusion, fixed at the protrusion, and the direction is changed, and the lead wire is wound. It is possible to draw out the terminals provided on the wire stopper frame, etc.

Furthermore, by providing an appropriate number of the protrusions at arbitrary locations on the winding column, the winding method on the winding column (for example, referring to the winding mode of the primary winding or the secondary winding in a transformer, etc.) can be changed. Moreover, the protrusion can be deleted if necessary.

Further, the protrusion is provided on the winding column so as to be substantially parallel to the base material surface on which the coil bobbin body is mounted, and the lead wire at the end of the winding is bent by the protrusion, and the winding column is bent by the protrusion. By performing the drawing process along the surface of the coil bobbin, it is possible to avoid the drawing process along the bottom of the winding of the coil bobbin.

(Example) Embodiments of the present invention will be described in detail based on the drawings.

Fig. 1 is a perspective view showing an embodiment of a coil bobbin according to the present invention, Fig. 2 is a side view showing a state in which the coil bobbin in the same embodiment has been subjected to winding processing, and Fig. 3 is a perspective view showing a coil bobbin in the same embodiment. Fig. 4 is a side view showing a situation in which the coil bobbin in the same example was subjected to other winding processing, and Fig. 5 is a side view showing the situation in which the coil bobbin in the same example was subjected to the winding process. Fig. 6 is a bottom view showing the coil bobbin according to the same embodiment after winding and inserting the magnetic core, and Figs. 7 to 13 show the coil bobbin according to the present invention. Explanatory diagrams showing other embodiments are shown.

As shown in FIG. 1, a coil bobbin 35 according to the present invention
is formed by integrally molding synthetic resin or the like using a mold or the like (not shown).

Describing the components of each part of the coil bobbin 35 in detail, first, the winding column 29 located in the center has a substantially square prism shape, and a winding wire, which will be described later, is wound around the outer periphery of the winding column 29. be done.

A first protrusion 31 and a second protrusion 32 each having a substantially cylindrical shape are protruded from the front and rear side walls of the winding column 29 and are located at the rear of the winding column 29 .

A first winding stopper frame 2 is provided at both ends of the winding column 29, respectively.
A first winding stop frame 22 and a second winding stop frame 22 are provided so as to sandwich the winding column 29, and the first winding stop frame 21 and the second winding stop frame 22 play a role such as winding stop. play.

Further, the first magnetic core mounting base material 23 and the second magnetic core mounting base material 23 and the second magnetic core mounting base material 23 are arranged on the longitudinal extension line of the winding column 29 and attached to the first winding stop frame 21 and the second winding stop frame 22, respectively. Base material 24
has been extended.

A first leader line groove 25 and a second leader line groove 26 are formed at the bottom of the first magnetic core mounting base material 23 and the second magnetic core mounting base material 24, and are used to guide the winding wire, which will be described later. It has become.

From the side ends of the first magnetic core mounting base material 23 and the second magnetic core mounting base material 24, they are integrally molded from copper or the like so that they each have a substantially rod shape in the longitudinal direction of the winding column 29, and are plated with tin or the like. The first pin terminal 27 and the second pin terminal 28 that have been subjected to the above-described process are implanted so as to avoid the positions where the first lead wire groove 25 and the second lead wire groove 26 are formed.

Furthermore, the first winding stop frame 21 and the second winding stop frame 22
A magnetic core insertion hole 30 is formed inside the wound column 29, into which a magnetic core made of a magnetic material or the like, which will be described later, is inserted.

Winding column 29 of coil bobbin 35 configured as described above
Several examples of wire winding and leader line processing will be described with reference to FIGS. 2 to 4 in sequence.

In FIG. 2, the starting end of the winding 40, which is made of a fine conductive wire made of copper or the like and coated with enamel or the like to insulate it from the outside, is wrapped around the base end of the second pin terminal 28. After that, the wire is guided by the second lead wire groove 26 and led out to the winding column 29.

Next, the winding 40 is
The winding pillar 2 up to the first protrusion 31 formed on the winding pillar 29
9 is wound in sequence.

Thereafter, the first protrusion 31 and the second protrusion 32 are used as winding stops and bent ends, and henceforth the first lead-out wire portion 3
6, the wire is introduced along the side wall of the winding column 29 into the first lead wire groove 25 formed in the first magnetic core mounting board 23 on the opposite side from the winding start portion.

The first leader line portion 36 introduced and guided into the first leader line groove 25
is subjected to wrapping processing on the first bin terminal 27.

At this time, the first leader line part 36 and the second leader line part 37, which are wrapped around the first and second bin terminals 27 and 28, are fixed with solder or the like (not shown) and are electrically connected. being done.

Further, according to FIG. 3, the first protruding part 31 and the second protruding part 32 are used as winding stops, and also serve as a rotating shaft of approximately - rotation, thereby serving as a second lead wire part 37.
A case is shown in which the winding 40 is led out along the side wall of the winding column 29 toward the n-core mounting board 24 side.

Further, in FIG. 4, the first protrusion 31 and the second protrusion 32 are used as winding stops and have bent ends to form a third lead-out line 38 on the second magnetic core mounting board 2 as described above.
A case is shown in which the winding 40 is led out along the side wall of the winding column 29 to the fourth side.

Among the above, the winding 40 is wound to form the winding part 34, and the second lead-out wire part 37 is connected to the first protrusion 31 or the second
The coil bobbin 35 that has been pulled out by the protrusion 32
The current state of the bottom surface is shown in Figure 5.

At this time, referring to FIGS. 2 to 5, each leader wire section is pulled out along the side surface of the winding section 34 after being changed in direction by each protruding section. No routing is performed on the bottom side of 34.

Next, by molding a magnetic material or the like, the central magnetic legs of each of the first E-shaped core 41 and the second E-shaped core 42, which are formed to have an E-shape in top view, are opened in the coil bobbin 35. FIG. 6 shows an inductor component 43 formed by being inserted into the formed magnetic core insertion hole 30 from both sides and fixed with a fixture or the like (not shown).

According to the coil bobbin 35 configured as described above, the first protrusion 31 and the second protrusion 32 fix the lead-out wire part and the direction Since it is possible to change the windings and to perform a drawing process on each bin terminal, it is possible to eliminate the complicated process of adhesively fixing the ends of the windings using fixing tape or the like, which was conventionally done.

Further, a first protrusion 31 and a second protrusion 31 are provided on the side surface of the winding column 29.
By providing the protruding portion 32 in a protruding manner, bending each leader line portion of the winding 40, and performing a drawing process along the side surface thereof through the first leader line groove 25 and the second leader line groove 26, respectively. Since drawing out along the bottom winding surface of the winding portion 34 is avoided, it is possible to prevent an increase in the number of parts in the coil bobbin 35 due to the wire diameter of the winding 40 being added to the bottom.

In addition, in the present invention, there is no fear that the number of parts warehouses will increase in the height direction, but the width in the lateral direction will increase slightly.
With the recent trend toward thinner electronic devices, it has become a priority to prevent an increase in the thickness of inductor components, which occupy a particularly large volume.

Further, the coil bobbin 35 may be integrally molded from a magnetic material so as to have a pincushion shape in which a disc-shaped winding stopper is provided at each end of a cylindrical winding column.

Next, another embodiment of the present invention will be described with reference to FIGS. 7 to 11.

Note that the same parts or parts having the same functions as those in the previous embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted.

The coil bobbin 35 in FIG. 7 is wound I! on the first magnetic core mounting base material 23 side. 40, and the winding pillar 29
After that, the end of the winding 40 is led out to the second magnetic core mounting base material 24 as a fourth lead wire part 39 via the protruding part 31.

In addition, the coil bobbin 55 in FIG.
9, a first protrusion 31 and a second protrusion 32 are protruded, and a third protrusion 53 and a fourth protrusion 54 are protruded near the protrusion.

The winding 40 has the first protrusion 31 and the second protrusion 32.
The primary winding 51 is wound on the first magnetic core mounting base material 23 side and processed as in the primary leader wire processing section 48.
The third protruding portion 53 and the fourth protruding portion 54 are wound toward the second magnetic core mounting base material 24 side, and are processed as in the secondary leader wire processing portion 49 to become the secondary winding 52, respectively. ing.

Therefore, a transformer is constructed by winding the winding 40 around the coil bobbin 55 as the primary winding 5I and the secondary winding 52.

The coil bobbin 55 is provided with a first protrusion 31, a second protrusion 32, a third protrusion 53, and a fourth protrusion 54, respectively, and by using the protrusions as winding stops, the primary It is possible to divide the winding into a winding and a secondary winding, and also perform various extraction processes.

The coil bobbin 65 shown in FIG. 9 has a first protrusion 31 and a second protrusion 32 protrudingly provided on a winding column 29, and approximately at the center between the protrusion and the second magnetic core mounting base 24. A third protrusion 63 and a fourth protrusion 64 are provided protrudingly from the portion.

Further, the secondary winding 62 is connected to the first protrusion 31 and the second protrusion 3 through the third protrusion 63 and the fourth protrusion 64.
The wire is wound until the winding stop point 2 is reached, and the terminal end is drawn out by the first protrusion 31 as in the secondary leader wire processing section 59.

Further, the primary winding 61 is connected to the third protrusion 63 and the fourth protrusion 6 via the first protrusion 31 and the second protrusion 32.
It is wound until the winding stops at 4.

The terminal end is connected to the primary leader line processing section 5 by the fourth protrusion 64.
The withdrawal process is as shown in 8.

Therefore, each winding portion is wound redundantly between each protruding portion, which is significant in promoting the degree of coupling between the primary winding 61 and the secondary winding 62. be.

Next, the coil bobbin 75 shown in FIG.
The first protrusion 73 and the second protrusion 74 as well as the third protrusion 63 and the fourth protrusion 64 are provided in such a manner that the column heights of the first protrusion 73 and the second protrusion 74 are particularly large. , is formed to have a lower height than the third protrusion 63 and the fourth protrusion 64.

Further, the secondary winding 72 is connected to the first protrusion 73 and the second protrusion 7 via the third protrusion 63 and the fourth protrusion 64.
The wire is wound until the winding stop point 4 is reached, and the terminal end is drawn out by the first protrusion 73 as in the secondary leader wire processing section 69.

Further, the primary winding 71 is connected to the third protrusion 63 and the fourth protrusion 6 via the first protrusion 73 and the second protrusion 74.
The wire is wound until the winding stop point 4 is reached, and the terminal end is drawn out by the fourth protrusion 64 as in the primary leader wire processing section 68 .

At this time, since the first protrusion 73 and the second protrusion 74 are formed with a low height, the winding layer related to the secondary winding 72 is formed on the first protrusion 73 and the second protrusion. 74, so that the primary winding 71 can be smoothly and neatly formed.

In the above embodiment, by providing an appropriate number of the protrusions at arbitrary locations on the winding column 29, the winding method for the winding column 29 can be changed, and the protrusions can be arranged as needed. It can also be deleted.

Further, the coil bobbin 85 shown in FIG.
A first protruding part 31, a second protruding part 32, a third protruding part 63, and a fourth protruding part 64 are protruded from the first protruding part 31 and the second protruding part 32, and the third protruding part 31 and the second protruding part 32, Projection 63
The winding 40 is wound around one winding post 29 between the fourth protrusion 64 and the fourth protrusion 64, and leader wire processing is performed as in the primary leader wire processing section 78 and the secondary leader wire processing section 79, respectively. ing.

In this embodiment as well, the same effects as in the previous embodiment can be achieved.

Next, the coil bobbin 95 shown in FIG. 12 has a rectangular prism-shaped 91 protruding from the lower side wall, and the bottoms of the first magnetic core mounting base 23 and the second magnetic core mounting base 24 are , a first bottle terminal 97 and a second bottle terminal 98 each having a bottle shape are implanted.

When the winding 40 is wound around the coil bobbin 95, the above-mentioned 91
is 1! As well as being tightened, a drawing process is being performed as in the drawing line processing section 96.

This means that the leader line processing unit 9
7 and the second pin terminal 98 can be planted on the same surface.

Moreover, the coil bobbin 105 shown in FIG.

A first protrusion 101 and a second protrusion 102 are provided on the side surface of the winding column 29 at different heights.

In this embodiment as well, the same effects as in the previous embodiment can be achieved.

Although the winding column in each coil bobbin has been described as having a substantially rectangular prism shape, the present invention is not limited to this, and may be, for example, cylindrical.

Further, the protrusion formed on the coil bobbin may have a side wall width of the coil bobbin.

Furthermore, the protrusion formed on the winding column of the coil bobbin according to the present invention has a bulged tip to form a key shape, and this part prevents the winding from falling off or flying out, making it more useful. It is also possible to provide a winding action.

(Effects of the Invention) Since the coil bobbin according to the present invention is configured as described above, it has the following effects.

(1) Since the coil bobbin is constructed by forming at least one protrusion on the winding column, which is provided with a winding stop frame at the end, which serves as a winding stop for the winding, the winding of the fill bobbin is When winding the winding around the pillar, the protrusion can be used as a winding stop for the winding, and the lead wire at the end of the winding can be fixed at the protrusion by being bent by the protrusion. At the same time, the direction can be changed and the lead wire can be drawn out to a terminal provided on a winding stopper or the like.

Therefore, it is possible to eliminate the complicated process of adhesively fixing the ends of the winding with a fixing tape or the like that was performed during the drawing process, and to automate the process of winding the wire onto the coil bobbin and the process of drawing out the coil. This has the excellent effect of reducing the production cost of transformers, etc. and providing highly reliable products.6 (2) The coil bobbin body should be approximately parallel to the base material surface on which it is mounted. The above-mentioned protrusion is provided on the winding column, and the leader wire at the end of the @ wire can be bent by the above-mentioned protrusion, and the drawing process can be performed along the surface of the winding column. It is possible to avoid the withdrawal process along the bottom of the winding, which occurs frequently.

This prevents the diameter of the winding from being added to the component height of the coil bobbin by pulling out the end of the winding along the bottom of the winding. This is effective when the wire diameter is large, and has the excellent effect that the transformer etc. made up of the coil bobbin can be made thin, and as a result, the electronic equipment etc. in which the transformer etc. are incorporated can be made thin. has.

(3) When an appropriate number of the protrusions are provided at arbitrary locations on the winding column,
The protrusion can be removed if necessary,
The winding method can be quickly and easily changed in response to changes in design specifications without making major changes such as changing the mold, which has the advantage of allowing for greater variety in design. has.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of a coil bobbin according to the present invention, Fig. 2 is a side view showing a state where the coil bobbin in the same embodiment has been subjected to winding processing, and Fig. 3 is a perspective view showing the coil bobbin in the same embodiment. Fig. 4 is a side view showing a situation in which the coil bobbin in the same example was subjected to other winding processes; Fig. 5 is a side view showing the situation in which the coil bobbin in the same example was subjected to the winding process. Fig. 6 is a plan view showing the coil bobbin according to the same embodiment after winding and inserting the magnetic core, and Figs. 7 to 13 show the coil bobbin according to the present invention. FIG. 14 is a side view showing the winding process in a conventional coil bobbin.

Claims (1)

[Claims] (1) In a coil bobbin having a winding column on which a winding wire is wound, and a winding stop frame provided at an end of the winding column and serving as a winding stop, at least one winding column is provided on the winding column. A coil bobbin characterized by forming a protrusion.