JPH0356020Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coil bobbin, and more specifically, to a coil bobbin with an improved end processing means for a lead wire at the beginning of winding.

[Prior Art] This type of coil bobbin is conventionally described in, for example, Japanese Utility Model Application Publication No. 59-26204.

In this conventional technology, a cylindrical winding core made of an insulating material is provided with flanges projecting outward at both the upper and lower ends, respectively.
A protrusion along the opposing inner wall of the winding core is provided on the upper surface of the upper end flange, a plurality of vertical grooves are provided on the opposite side parallel to the protrusion of the lower end flange, and a plurality of pin terminals are implanted, In addition, a plurality of thin longitudinal grooves are formed in each of the opposite end surfaces parallel to the protruding part of the upper end tsuba, a columnar part is formed between the longitudinal grooves, and this note-shaped part is cut into a semicylindrical shape. This is a bobbin with a pin terminal for transformers.

[Problem to be solved by the invention] There is no problem when the lead wire at the beginning of winding of the coil in the above-mentioned prior art is soldered from the lower flange side through the vertical groove to the terminal pin, but when the lead wire at the beginning of winding is soldered to the terminal pin from the lower flange side, After winding the coil from the flange around the semi-cylindrical column, the lead wire at the beginning of the winding is made a U-turn around the semi-cylindrical column and soldered to the terminal pin on the lower flange. Since the lead wires at the beginning of winding are brought in contact with each other and are led almost perpendicularly, layer shorts, that is, interlayer short circuits, are likely to occur between the lead wires at the beginning of winding and the outer surface of the coil, making it dangerous as a high voltage coil and making it unusable. There is one problem.

Furthermore, in the conventional example described above, the lead wire of the coil is soldered to the pin terminal on the upper surface of the columnar part through the longitudinal grooves on both sides, making a U-turn and soldering it to the pin terminal. The second problem is that it slips smoothly and easily comes off.

In other words, since the kamaboko surface of the columnar part is flush with the top surface of the upper flange, there is nothing to support the lead wire in the opening direction of the vertical groove. Therefore, if a disturbance is applied to the coil-wound bobbin, the lead wire There is a major problem in that the coil slides smoothly from the kamaboko surface of the columnar part and comes off from the columnar body toward the front side thereof, which significantly deteriorates the product yield in this type of coil manufacturing process.

In order to eliminate each of the above-mentioned problems, this invention forms a flange integrally with the winding drum, and a column that is sufficiently higher than the upper surface of the flange is provided adjacent to the vertical groove provided on the end surface of the flange. The purpose is to easily carry out terminal processing of the lead wire at the beginning of winding by protruding the winding lead wire of the coil through a lead wire draw-out part provided on the flange and pulling out the column as a guide post. do.

[Means for Solving the Problems] The purpose of this invention described above is to construct a coil bobbin in which flanges and terminal blocks are integrally formed at both upper and lower ends of a cylindrical winding body made of an insulating material, respectively, and projecting outward. In this case, a plurality of vertical grooves are provided on opposite sides of the terminal block parallel to the opposite inner wall of the winding drum, and a plurality of pin terminals are planted, and a plurality of vertical grooves are formed on the end face of the flange parallel to the opposite sides. This is achieved by providing a pillar protruding from the flange adjacent to the groove and sufficiently higher than the upper surface of the flange, and by providing a lead wire extraction portion on the flange on the outer wall portion of the winding drum.

[Function] First, the lead wire at the beginning of the winding is drawn out from the cylindrical winding drum side through the pull-out part of the flange upwards for a desired length, and after being temporarily fixed on a pillar projecting sufficiently high from the flange, Start wrapping the coil around the body.

After winding the coil, unwind the lead wire at the beginning of winding, which has been temporarily fixed in advance as above, from the column to make it free, guide the base of the column horizontally and downward from the vertical groove of the flange. The terminal of the lead wire at the beginning of winding of the coil can be carried out by leading the lead wire sufficiently far from the outer surface of the wound coil, passing through the vertical groove of the lead terminal block, and soldering it to the terminal pin.

Therefore, by guiding the lead line at the beginning of winding downward from the base of a sufficiently high column, it will not come off the column to the side.

In addition, the winding start wire can be led out from the flange to the terminal block at a sufficient distance from the outer surface of the coil.

[Example] Examples will be described with reference to the drawings.

First of all, the basic structure of this invention is that a flange 3 and a terminal block 7 are integrally formed at both upper and lower ends of a cylindrical winding body 2 made of an insulating material such as plastic, each projecting outward as shown in FIG. When forming the coil bobbin, a plurality of vertical grooves 9 are provided on opposing sides of the terminal block 7 parallel to the opposing inner wall of the winding drum 2.

Then, a plurality of pin terminals 8, 8 are implanted.

Further, a plurality of vertical grooves 14 are formed on the end face of the flange 3 parallel to the opposing sides as shown in FIG.
A column 18 which is sufficiently higher than the upper surface of the flange 3 is provided protrudingly adjacent to the column 17.

Further, as shown in FIGS. 2 and 3, a lead wire drawing portion 16 is provided on the flange 3 of the outer wall portion of the winding drum 2 to constitute a coil bobbin.

Next, an example of the use of the coil bobbin of this invention will be explained.

First, in order to start winding the coil around the winding drum 2, the winding start wire 24 is drawn out from the side of the cylindrical winding drum 2 upward through the lead-out portion 16 of the flange 3 to a desired length, and is set to protrude sufficiently high from the flange 3. After being temporarily fixed to the column 18, winding of the coil around the cylindrical winding drum 2 begins.

After winding the coil, unwind the winding lead wire 24, which has been temporarily fixed in advance as described above, from the column 18 to make it free. Terminal processing of the lead wire 24 at the beginning of winding of the coil is carried out by pulling it downward from the groove 17, leading it sufficiently away from the outer surface of the wound coil, passing through the vertical groove 9 of the terminal block 7, and soldering it to the terminal pin 8. can.

Therefore, by leading the lead line 24 at the beginning of the winding downward from the base of the column 18 which is sufficiently high, the column 18 can be
It is safe because it does not fall off the side of 8.

Moreover, since the lead wire 24 at the beginning of winding can be led out from the flange 3 to the terminal block 7 with sufficient distance from the outer surface of the coil, accidents such as misalignment between the wires and short circuits between the wires or layer shorts between the lead wire 24 and the outer surface of the coil can be avoided. It can definitely be prevented.

Preferred specific examples of this invention will be described in detail below.

As shown in FIG. 1, the coil bobbin 1 of this invention has flanges 3 at both ends of a hollow rectangular cylindrical winding drum 2.
6 is integrally formed with the winding drum, and one or two flanges 4 and 5 as shown in the embodiment are formed integrally with the winding drum with a predetermined interval therebetween, and the flange On the outside of the terminal block 6, a terminal block 7 is integrally formed, in which a large number of pin terminals 8 are integrally attached to one parallel edge at predetermined intervals.

A plurality of vertical grooves 9 to 12 are formed on the edges corresponding to the parallel edges of the flanges 4 to 6 and the terminal block 7, respectively, to allow the lead wire to pass through and to fix the lead out position, respectively. They are formed with an interval that is an integral multiple of this interval.

As shown in FIG. 2, a vertical groove 14, which is deeper than at least the wire diameter of the lead wire, is formed in most of the edge corresponding to the one parallel edge of the flange 3. A lead wire pull-out portion 16 is formed in one place of the receding edge 15, which is formed by a groove having a depth approximately equal to the winding layer thickness of the coil or a hole in the flange 3 located on the outer wall of the winding drum 2. A vertical groove 17 for drawing out the lead wire, which is slightly larger than the wire diameter, is provided between both ends of the groove and the adjacent groove, and a part of the vertical groove 14 is extended to the edge end. This projecting portion forms a plurality of columns 18 that project outwardly beyond the thickness of the flange 3 and are larger than the wire diameter of the lead wire.

Further, the flange 3 is formed with a core mounting recess 19 in the center thereof in a direction parallel to the line, and a pair of U-shaped protrusions 20 having openings on the outside at the edges of the recess. .

The coil bobbin 1 of this invention is constructed as described above, and when this coil bobbin is used as a transformer, for example, coils are wound between the flanges 3 and 4, and if necessary between the flanges 4 and 5 and between the flanges 5 and 6. After mounting, the lead wire at the end of each coil is connected to the vertical grooves 9 to 12 of flanges 4 to 6.
The pull-out position is fixed through the pin terminal 8, and the end is twisted around the pin terminal 8 several times and fixed by soldering.

As shown in FIGS. 2 and 3, the lead wire 24 at the beginning of winding the coil is drawn out upward from the lead wire draw-out part 16 in advance, and then inserted into the vertical grooves 17 and 17 between the central column 18. After the lead wire is connected to the column 18 and temporarily fixed, winding of the coil around the winding drum 2 is started.

[Effects of the invention] Since this invention is configured as described above, it produces the effects described below.

First, the winding start lead wire 24 is drawn out in advance from the cylindrical winding drum 2 side through the lead-out portion 16 of the flange 3 to a desired length upward, and then is connected to the column 1 protruding sufficiently high from the flange 3.
8 and temporarily fixed, winding of the coil around the cylindrical winding drum 2 begins.

After winding the coil, unwind the winding lead wire 24, which has been temporarily fixed in advance as described above, from the column 18 to make it free. Terminal processing of the lead wire 24 at the beginning of winding of the coil is carried out by pulling it downward from the groove 17, leading it sufficiently away from the outer surface of the wound coil, passing through the vertical groove 9 of the terminal block 7, and soldering it to the terminal pin 8. can.

Therefore, by leading the lead line 24 at the beginning of the winding downward from the base of the column 18 which is sufficiently high, the column 1
The first effect is that it is safe because it does not fall off the side of the 8.

Moreover, with this invention, the lead wire 24 at the beginning of winding can be led out from the flange 3 to the terminal block 7 at a sufficient distance from the outer surface of the coil.
A second effect is that it is possible to reliably prevent line-to-line misalignment accidents and line-to-line short circuits, that is, layer shorting accidents, between the coil and the outer surface of the coil.

[Brief explanation of drawings]

The figures show one embodiment of this invention. Figure 1 is a perspective view of the entire bobbin, Figure 2 is a perspective view of the main parts of the bobbin, and Figure 3 is a view of the bobbin with a coil wound around it. FIG. 3 is a front view of main parts. 1... Coil bobbin, 2... Winding drum, 3-6...
Flange, 7...Terminal block, 8...Pin terminal, 9~
12, 14, 17... Vertical groove, 13... Edge, 15
... Retreating edge portion, 16 ... Lead wire pull-out portion, 18
...Column, 19...Recess, 20...Protrusion, 21...
...Coil, 24...Leader wire.

Claims (1)

[Scope of utility model registration request] A flange 3 projecting outward is provided flatly at the upper end of the cylindrical winding drum 2 made of an insulating material, and the winding drum 2
In a coil bobbin having a terminal block 7 integrally formed on the lower end thereof, a plurality of vertical grooves 9, 9 are provided on opposite sides of the terminal block 7 parallel to the opposing inner wall of the winding drum 2, and a plurality of pin terminals 8, 8 are implanted. a plurality of longitudinal grooves 1 formed on the end face of the flange 3 parallel to the opposing sides;
4, 17, a column 18 protruding from the flange 3 which is sufficiently higher than the upper surface of the flange 3, and a lead wire drawing part 16 is provided on the flange 3 at the outer wall portion of the winding drum 2.