JP4632364B2 - Winding parts - Google Patents

Description

  The present invention relates to a winding component such as an insulation transformer.

  Conventionally, as this type of winding component, a winding component in which a vertical type winding component is miniaturized is disclosed in Patent Document 1 (see FIG. 6). As shown in FIG. 6, an annular winding in which a primary side winding (generally a single-layer insulated wire such as an enameled wire) and a secondary side winding (typically a three-layer insulated wire) are wound. A three-layer insulated wire that is erected on the opposite side of the winding portion 3a of the bobbin 3 and the second flange portion 3B on which the pair of flange portions 3C and 3B forming the portion 3a is formed, and is drawn from the winding portion 3a One end of 6 is drawn out along the side surface of one flange 3 i and fixed by soldering with a pin 4. In this case, when the three-layer insulated wire 6 is fixed by solder, a phenomenon that a part of the molten solder rises toward the primary winding occurs. This phenomenon is called solder rise. Here, a structure that extends the second flange portion 3B is provided, and a gap that prevents molten solder from rising is formed between the second flange portion 3B and the safety distance from the primary winding is reduced. This ensures vertical winding components with a small height.

  Recently, along with the downsizing of devices on which winding components are mounted, it is desired to reduce not only the height of the winding components but also the mounting area.

Japanese Patent No. 3299136

  In Patent Document 1 described above, the safety distance of molten solder rising between the primary side winding and the three-layer insulated wire 6 is ensured only by the dimension in the width direction of the winding component. That is, since the structure is such that only the second flange 3B is extended in order to ensure a safe distance between the molten solder of the three-layer insulated wire 6 and the primary side winding, there are restrictions on reducing the board mounting area. There was a problem that there was.

  Further, in the horizontal winding component, there is a problem that the core 5 portion also needs to secure a safe distance for molten solder.

  The present invention has been made to solve the above-mentioned problems, and the technical problem is that a safe distance for the molten solder to rise between the core 5 and the three-layer insulated wire 6 can be secured, the height is low, and the mounting area is small. It is to provide small winding parts.

The first invention for achieving the above object is to provide a bobbin having a pair of flanges (3C, 3B) facing each other with an annular winding part (3a) around which an electric wire (2) is wound. 3), and the upper (3d, 3k) and lower (3e, 3e, 3k) and (3e) of the first and second flanges (3B) constituting the pair of flanges (3C, 3B). 3b) and a pin (4) erected on the center side of the bottom surface of each lower step (3e, 3b) of the pair of flanges (3C, 3B) And an end portion of the electric wire (2) drawn out from the winding portion (3a) is drawn out from an upper surface of the upper stage portion (3d) of the first flange portion (3C), and the first Bridging to the upper end of the side surface of the upper stage part (3d) of the collar part (3C), bridging to the upper end of the side surface of the lower stage part (3e) of the first collar part (3C), At least one of the electric wires (2) fixed to a pin (4) erected on the bottom surface (3e) of the lower step (3e) of one collar (3C) and wound for each of a plurality of systems has three layers. In a winding component composed of an insulated wire (6), a part parallel to the direction in which the pin (4) is erected and a direction perpendicular to the direction in which the pin (4) continuous with the parallel part is erected An inverted T-shaped lower island portion (3l) composed of a portion is provided on the lower step portion (3e) of the first flange portion (3C), and the lower step portion (3e) of the first flange portion (3C) A first groove (3f) leading from the center of the upper end of the side surface to the lower end is provided on the side surface of the lower step (3e) of the first flange (3C), and the length of the first groove (3f) along the line Is longer than the length of the perpendicular from the upper end to the lower end of the side surface of the lower step (3e) of the first flange (3C), and the electric wire (2) is the first A coil component that is wired along the groove (3f).

A second invention for achieving the above object is the first invention defined by a vertical straight line distance from a side surface of the lower step portion (3e) of the first flange portion (3C) to a bottom surface of the groove (3f). the depth of the first groove (3f), said longer than the diameter of the three-layer insulated wire (6), said first flange portion lower portion (3e) and the lower island of the (3l) of (3C) The width | variety of the said 1st groove | channel (3f) defined by the distance between is a winding component made longer than the diameter of the said 3 layer insulated wire (6).

  According to a third aspect of the present invention for achieving the above object, there is a vertical straight line distance from the lower side surface of the lower step portion (3e) of the first flange portion (3C) to the bottom surface of the first groove (3f). The defined depth of the lower end of the first groove (3f) is perpendicular to the side of the upper end of the lower step (3e) of the first flange (3C) from the bottom surface of the first groove (3f). This is a winding component that is longer than the upper end depth of the first groove (3f) defined by a linear distance.

  In order to achieve the above object, a fourth invention is characterized in that the first flange is formed from a central portion at an upper end of a side surface close to the core (5) of the lower step (3e) of the first flange (3C). Two or more first grooves (3f) directed to both sides of the lower end of the side surface close to the pin (4) of the lower step portion (3e) of the portion (3C) are provided in the lower step of the first flange portion (3C). The shortest distance between the center points of the first groove (3f) which is obliquely provided on the side surface of the portion (3e) and which is on both sides of the lower end of the side surface of the lower step portion (3e) of the first flange portion (3C) Is a winding component having a width wider than the shortest distance between the standing points of the two pins (4) on the lower surface of the lower step (3e) of the first flange (3C).

  According to a fifth aspect of the invention for achieving the above object, the bottom surface of the second groove (3g) on the side surface of the upper step (3d) of the first flange (3C) adjacent to the core (5) is provided. The height and the height of the bottom surface of the first groove (3f) on the side surface of the lower step (3e) of the first flange portion (3C) are higher than the height of the side surface of the core (5), This is a winding component in which the upper step portion (3d) and the lower step portion (3e) of the first flange portion (3C) protrude from the core (5) toward the three-layer insulated wire (6).

  6th invention for achieving the said objective is defined by the distance of the perpendicular straight line from the side surface of the upper step part (3d) of said 1st collar part (3C) to the bottom face of said 2nd groove | channel (3g). The depth of the second groove (3g) is longer than the diameter of the three-layer insulated wire (6), and the second groove in the upper stage (3d) of the first flange (3C) The width of the bottom surface of (3g) is a winding component that is longer than the diameter of the three-layer insulated wire (6).

  The seventh invention for achieving the above object is the first groove (3f) on both sides of the lower end of the side surface of the lower step (3e) of the first flange (3C) and the first flange. The third groove (3h) connecting the two pins (4) on the lower surface of the lower step portion (3e) of the portion (3C) has a lower surface of the lower step portion (3e) of the first flange portion (3C). Winding parts engraved in

  According to an eighth aspect of the invention for achieving the above object, the lower end of the side surface of the lower step portion (3e) of the first flange portion (3C) is determined from the shortest distance between the standing points of the two pins (4). Two pins (4) on the lower surface of the lower step (3e) of the first flange (3C) with the shortest distance between the center points of the first grooves (3f) on both sides of the first groove (3f) widened Is a winding component.

  According to a ninth aspect of the present invention for achieving the above object, the pin (4) is recessed on the side of the lower surface (3e) of the first flange (3C) where the third groove (3h) is not present. The protruding portion (3j) to be provided is projected, and the three-layer insulated wire (6) has three types of the second groove (3g), the first groove (3f), and the third groove (3h). As described above, the winding part is fixed to the pin (4).

  According to the present invention, the end portion of the electric wire (2) drawn out from the annular winding portion (3a) is drawn out from the upper surface of the upper stage portion (3d) of the first flange portion (3C), and the first The first brim is bridged to the upper end of the side of the upper stage (3d) of the upper brim (3C), and is bridged to the upper end of the side of the lower stage (3e) of the first brim (3C). A first groove that is fixed to a pin (4) erected on the bottom surface of the lower step (3e) of (3C) and communicates from the upper end to the lower end of the side surface of the lower step (3e) of the first flange (3C) (3f) is provided on the side surface of the lower step (3e) of the first flange (3C), and the length of the first groove (3f) along the line is the lower step (3e) of the first flange (3C). By extending the length of the vertical line from the upper end to the lower end of the side surface of the wire and wiring the electric wire (2) along the first groove (3f), the molten solder rise of the three-layer insulated electric wire 6 and the core (5) Creepage distance More can be made longer.

  Further, the depth of the first groove (3f) is made longer than the diameter of the three-layer insulated wire (6), and the width of the first groove (3f) is made longer than the diameter of the three-layer insulated wire (6). By making the depth of the second groove (3g) longer than the diameter of the layer insulated wire (6) and making the width of the bottom surface of the second groove (3g) longer than the diameter of the layer 3 insulated wire (6), The first groove (3f) and the second groove (3g) deeper than the three-layer insulated wire (6) can be formed, and a structure in which the three-layer insulated wire (6) is hardly damaged can be realized.

  Furthermore, the lower end depth of the first groove (3f) is longer than the upper end depth of the first groove (3f) and is close to the core (5) of the lower step part (3e) of the first flange part (3C). The first groove (3f) is obliquely provided at the lower end of the side surface close to the pin (4) of the lower step portion (3e) of the first flange portion (3C) from the center portion at the upper end of the side surface to be The shortest distance between both center points of the groove (3f) is wider than the shortest distance between the points where the two pins (4) are erected on the lower surface of the lower step (3e) of the first flange (3C). The two pins (4) are erected on the lower surface of the lower step (3e) of the first flange (3C), and the first groove (3f) and the lower step of the first flange (3C) The third groove (3h) for connecting the two pins (4) on the lower surface of (3e) is engraved on the lower surface of the lower step (3e) of the first flange (3C), thereby Make a step in the groove (3f) of the three-layer insulation (6) the first groove through which the (3f), by the third obliquely grooves (3h) of the can longer total creepage distance 3 insulated wires (6). As a result, the creepage distance between the molten solder finish of the three-layer insulated wire 6 and the primary side winding can be made longer, a safe distance for the molten solder finish can be easily secured, the height is small, and the mounting area is small. The structure of the parts can be realized. In addition, since the three-layer insulated wire (6) passes through the three types of the second groove (3g), the first groove (3f), and the third groove (3h), Dimensions can be reduced.

  Further, the height of the bottom surface of the second groove (3g) and the height of the bottom surface of the first groove (3f) are higher than the height of the side surface of the core (5), and the three-layer insulated wire is higher than the core (5). (6) By extending the upper step (3d) and the lower step (3e) of the first flange (3C) on the side, the three-layer insulated wire (6) is stretched at a position higher than the side surface of the core (5). This makes it possible to realize a structure in which the core (5) and the three-layer insulated wire (6) do not contact each other.

  Further, by projecting a protrusion (3j) that is provided with a pin (4) on the side without the third groove (3h), it serves as a positioning guide for the mounting board, and the molten solder is used as a core (5 ) Or the winding (3a) and problems such as short circuit and disconnection can be avoided.

  As a result, it is possible to secure a safe distance for the molten solder to rise between the core 5 and the three-layer insulated wire 6, and to provide a winding component having a low height and a small mounting area.

  A winding component according to the best mode for carrying out the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a front view and a side view showing a cross section of a winding component of the present invention. Fig.1 (a) is a front view, FIG.1 (b) is a side view. FIG. 2 is a view for explaining a safe distance between the core and the molten solder portion in FIG. FIG. 3 is a view for explaining a safe distance between the core and the molten solder portion in the AA ′ cross-sectional view of FIG. 2. FIG. 4 is a view for explaining the safety distance between the core and the molten solder portion in the side view showing the cross section of the winding component of the comparative example. FIG. 5 is a view for explaining a safe distance between the core and the molten solder portion in the AA ′ cross-sectional view of FIG. 4.

  As shown in FIG. 1 to FIG. 5, the winding component 1 in the best mode for carrying out the present invention is a pair of flanges facing each other with an annular winding portion 3 a around which an electric wire 2 is wound. The bobbin 3 on which 3C and 3B are formed, and the upper step portions 3d and 3k and the lower step portions 3e and 3b of the first and second flange portions 3C and 3B constituting the pair of flange portions 3C and 3B, respectively. An electric wire 2 provided with a core 5 interposed therebetween and a pin 4 erected on the bottom surface of each of the lower step portions 3e and 3b of the pair of flange portions 3C and 3B, and drawn out from the annular winding portion 3a Is extended from the upper surface of the upper step portion 3d of the first flange portion 3C, bridges to the upper end of the side surface of the upper step portion 3d of the first flange portion 3C, and the lower step portion 3e of the first flange portion 3C. Bridge to the upper end of the side surface of the first and fixed to the pin 4 standing on the bottom surface of the lower step portion 3e of the first flange 3C, for each of a plurality of systems At least one system of the wound electric wire 2 is a coil component composed of a three-layer insulated wire 6. The first groove 3f that leads from the upper end to the lower end of the side surface of the lower step portion 3e of the first flange portion 3C is provided on the side surface of the lower step portion 3e of the first flange portion 3C, and the length of the line along the first groove 3f is: The length of the vertical line from the upper end to the lower end of the side surface of the lower step portion 3e of the first flange portion 3C is made longer, and the electric wire 2 is wired along the first groove 3f, whereby the molten solder of the three-layer insulated electric wire 6 rises. The creepage distance between the portion and the core 5 can be made longer.

  As a result, it is possible to easily secure a safe distance for the molten solder rising between the molten solder rising portion of the three-layer insulated wire 6 and the core 5, and to realize a structure of a winding component having a small height and a small mounting area.

  Here, the three-layer insulated wire 6 is pulled out from the vicinity of the upper step portion 3d of the first flange portion 3C, passes through the three types of the second groove 3g, the first groove 3f, the third groove 3h, and the pin 4 Entangled in The portion to be entangled is fixed by solder. In addition, there is a winding portion 3a so as to be sandwiched between the first flange portion 3C and the second flange portion 3B, and the primary side winding and the secondary side winding are wound thereon. The primary winding is fixed to the pin 4 of the second flange 3B, and the secondary winding is fixed to the pin 4 of the first flange 3C. Further, a pair of E-shaped cores 5 that form a continuous magnetic path in the central portion and the outer peripheral portion of the winding portion 3a are mounted. In the best mode for carrying out the present invention, a ferrite core is used for the core 5. The material forming the core may be a magnetic material selected according to the characteristics according to the application.

  In addition, the winding end part with respect to the bobbin 3 is located in the 1st collar part 3C in which the pin 4 of the bobbin 3 is not provided. Thereafter, the three-layer insulated wire 6 passes through the second groove 3g on the side surface of the upper step portion 3d of the first flange portion 3C, and the upper end of the side surface close to the core 5 of the lower step portion 3e of the first flange portion 3C. The lower surface of the lower step portion 3e of the first flange portion 3C passes through the two first grooves 3f from the central portion to the both sides of the lower end of the side surface close to the pin 4 of the lower step portion 3e of the first flange portion 3C. Wiring is made toward the pin 4 through the third groove 3h that connects the two pins 4 located in the pin 4, and is temporarily fixed by being entangled with the pin 4.

  After temporary fixing, the pin 4 is immersed in a molten solder bath, soldered to the portion where the three-layer insulated wire 6 is entangled, the insulating coating layer of the three-layer insulated wire 6 is removed, and the conductor portion is removed. The exposed conductor portion and the pin 4 are electrically connected and fixed.

  In the best mode for carrying out the present invention, since there are two three-layer insulated wires 6, from the central portion of the upper end of the side surface close to the core 5 of the lower step portion 3e of the first flange 3C, Two first grooves 3f are obliquely provided on the side surface of the lower step portion 3e of the first flange portion 3C so as to go to both sides of the lower end of the side surface close to the pin 4 of the lower step portion 3e of the first flange portion 3C. ing. Further, the three-layer insulated wire 6 spanned in the first groove 3f is connected to the pin of the lower step portion 3e of the first flange portion 3C from the upper end of the side surface close to the core 5 of the lower step portion 3e of the first flange portion 3C. An oblique first groove 3 f is provided so as not to reach the shortest distance to 4.

  More specifically, the first groove 3f is obliquely provided from the vicinity of the center of the upper end of the side surface of the lower step portion 3e of the first flange portion 3C. That is, the first groove 3f is continuously formed so as to approach both sides of the lower end of the side surface of the lower step portion 3e of the first flange 3C toward the lower surface adjacent to the side surface on which the first groove 3f is provided. Is done. Further, it is formed so as to be continuously connected to the third groove 3h provided on the lower surface of the lower step portion 3e of the first flange portion 3C at the lower end of the side surface of the lower step portion 3e of the first flange portion 3C. Further, the pin 4 provided on the lower surface of the lower step portion 3e of the first flange portion 3C is more than the position where the first groove 3f is formed at the lower end of the side surface of the lower step portion 3e of the first flange portion 3C. The lower flange portion 3e of the first flange 3C is positioned on the center side of the lower surface. By providing the first groove 3f and the third groove 3h, the temporary fixing portion between the pin 4 and the three-layer insulated wire 6 provided on the lower surface of the lower step portion 3e of the first flange 3C is used as a solder bath. Even when the solder crawls up while melting the surface coating of the three-layer insulated wire 6, it is possible to secure a sufficient creepage distance between the core 5 and the solder rising portion.

  Further, the depth of the first groove 3f is such that the lower end side of the side surface of the lower step portion 3e of the first flange portion 3C is deeper than the upper end of the side surface of the lower step portion 3e of the first flange portion 3C. Is formed. The depth of the upper end side and lower end side grooves of the first groove 3 f is longer than the diameter of the three-layer insulated wire 6. More specifically, the slanted first groove 3f is set to be deeper than the depth of the groove near the center that is the beginning of the first groove 3f at the upper end of the side surface of the lower step portion 3e of the first flange 3C. It ’s deep. By deepening the inclined first groove 3f, a sufficient creepage distance between the primary winding and the soldered portion can be secured.

  Note that the height of the bottom surface of the second groove 3g and the height of the bottom surface of the first groove 3f are higher than the height of the side surface of the core 5, and the first flange portion is closer to the three-layer insulated wire 6 than the core 5. By protruding the upper step portion 3d and the lower step portion 3e of 3C, the three-layer insulated wire 6 can be stretched at a position higher than the side surface of the core 5, and the core 5 and the three-layer insulated wire 6 are not in contact with each other. A structure can be realized in which the insulated wires 6 are bridged so as to be substantially straight.

  Further, a third groove 3h for connecting the first groove 3f on the side surface of the lower step portion 3e of the first flange portion 3C and the two pins 4 on the lower surface of the lower step portion 3e of the first flange portion 3C is provided. The reason for engraving is to make the creeping distance of the three-layer insulated wire 6 longer in the same shape. Further, the protruding portion 3j for recessing the pin 4 is protruded to the side of the pin 4 where the groove 3h is not present, so that the molten solder flows down to the core 5 and the winding portion 3a to avoid problems such as short circuit and disconnection. This is to protect the layer insulated wire 6.

  As shown in FIG. 2, the molten solder rising portion is electrically connected to the pin 4 of the three-layer insulated wire 6 and proceeds along the surface of the three-layer insulated wire 6 from the portion to be fixed. That is, the safety distance between the molten solder part 11 from which the insulation coating layer has been removed by the soldering process of the three-layer insulated wire 6 and the core 5 is an oblique creepage distance (the core 5 and the molten solder part 11 in FIG. Corresponding to insulation distance (1) = c + b + a), it is compared with a straight creepage distance as shown in FIGS. 4 and 5 (insulation distance 3 = c ′ + b ′ between the core 5 and the molten solder portion in FIG. 5). The The present invention shown in FIGS. 2 and 3 can ensure a longer safety distance when compared with the same shape. In the comparison between FIG. 3 and FIG. 5, when f = f ′, a + b> b ′ is satisfied, and the difference can be increased. As a result, in the case of the present invention, the insulation can be strengthened more than the comparative example in the case of the same shape.

  In addition, the three-layer insulated wire 6 passes through the second groove 3g on the side surface of the upper step portion 3d of the first flange portion 3C, and the upper end of the side surface close to the core 5 of the lower step portion 3e of the first flange portion 3C. The lower surface of the lower step portion 3e of the first flange portion 3C passes through the two first grooves 3f from the central portion to the both sides of the lower end of the side surface close to the pin 4 of the lower step portion 3e of the first flange portion 3C. The three-layer insulated wire 6 can be accommodated inside the first flange 3C, and the winding component 10 can be accommodated in the thickness of the three-layer insulated wire 6. The width corresponding to can be reduced in the width direction.

  Embodiments of the present invention will be described in detail with reference to the above-described drawings.

  The winding component 1 according to the embodiment of the present invention has a structure as shown in FIGS. 1, 2, 3, 4, and 5 and has a size of about 20 mm × 20 mm × 20 mm. In the winding component 1 according to the embodiment of the present invention, the end portion of the electric wire 2 drawn out from the annular winding portion 3a is drawn out from the upper surface of the upper step portion 3d of the first flange portion 3C, and the first hook It bridges to the upper end of the side of the upper step 3d of the part 3C, bridges to the upper end of the side of the lower step 3e of the first flange 3C, and stands on the bottom surface of the lower step 3e of the first flange 3C A first groove 3f that is fixed to the pin 4 and communicates from the upper end to the lower end of the side surface of the lower step portion 3e of the first flange portion 3C is provided on the side surface of the lower step portion 3e of the first flange portion 3C. The length of the line 3f of the groove 3f is longer than the length of the perpendicular line from the upper end to the lower end of the side surface of the lower step portion 3e of the first flange 3C, and the electric wire 2 is wired along the first groove 3f. The creeping distance between the molten solder finish of the layer insulated wire 6 and the core 5 was made longer.

  In the winding component 1 according to the embodiment of the present invention, the first flange portion 3C includes an upper step portion 3d and a lower step portion 3e, and the second flange portion 3B includes an upper step portion 3k and a lower step portion 3b. Is done. The core 5 was a ferrite core. The annular winding portion 3a has a structure in which a primary side winding (single-layer insulated wire such as enameled wire) and a secondary side winding (three-layer insulated wire) are wound.

  Further, the depth of the first groove 3 f is made longer than the diameter of the three-layer insulated wire 6, the width of the first groove 3 f is made longer than the diameter of the three-layer insulated wire 6, and the first groove 3 f is made larger than the diameter of the three-layer insulated wire 6. By increasing the depth of the second groove 3g and increasing the width of the bottom surface of the second groove 3g from the diameter of the three-layer insulated wire 6, the first groove 3f and the second groove 3d deeper than the three-layer insulated wire 6 are formed. The groove 3g can be formed, and a structure in which the three-layer insulated wire 6 is not easily damaged is realized.

  Furthermore, the lower end depth of the first groove 3f is longer than the upper end depth of the first groove 3f, and the first groove 3f extends from the central portion at the upper end of the side surface close to the core 5 of the lower step portion 3e of the first flange 3C. The first groove 3f is obliquely provided on the side surface of the lower step portion 3e adjacent to the pin 4 of the first flange portion 3C, and the shortest distance between both center points of the first groove 3f is the lower step of the first flange portion 3C. The two pins 4 are erected on the lower surface of the lower step portion 3e of the first flange 3C so as to be wider than the shortest distance between the erected points of the two pins 4 on the lower surface of the portion 3e. By engraving a third groove 3h that connects the groove 3f and the two pins 4 on the lower surface of the lower step portion 3e of the first flange portion 3C on the lower surface of the lower step portion 3e of the first flange portion 3C, The total creepage distance of the three-layer insulated wire 6 can be increased by providing a step in the first groove 3f and obliquely providing the first groove 3f and the third groove 3h through which the three-layer insulated wire 6 passes.As a result, the creepage distance between the molten solder finish of the three-layer insulated wire 6 and the primary side winding can be made longer, a safe distance for the molten solder finish can be easily secured, the height is small, and the mounting area is small. The parts structure was realized. Further, since the three-layer insulated wire 6 has a structure in which the three types of the second groove 3g, the first groove 3f, and the third groove 3h are passed, the lateral dimension of the winding component can be reduced.

  In addition, the height of the bottom surface of the second groove 3g and the height of the bottom surface of the first groove 3f are higher than the height of the side surface of the core 5, and the first flange portion is closer to the three-layer insulated wire 6 than the core 5. By projecting the upper step portion 3d and the lower step portion 3e of 3C, the three-layer insulated wire 6 can be stretched at a position higher than the side surface of the core 5, and a structure in which the core 5 and the three-layer insulated wire 6 do not contact can be realized. It was.

  Furthermore, by projecting the protruding portion 3j that makes the pin 4 recessed on the side without the third groove 3h, it serves as a positioning guide to the mounting substrate, and the molten solder flows down to the core 5 and the winding 3a. There were no problems such as short circuit or disconnection.

  Note that this example is merely an example. For example, a ferrite core is used for the core 5, but the material for forming the core is a magnetic material that is selected according to the characteristics according to the application. The other materials may be selected appropriately.

  Moreover, about the groove | channel, a pin, and an electric wire, although the example of only one set is demonstrated, if the three-layer insulated electric wire 6 is two, what is necessary is just to provide two similar 1st groove | channels 3f diagonally, If the number is n, the same first groove 3f may be obliquely provided. Even if a plurality of the first grooves 3f are provided, the gist of the present invention is not impaired. In addition, when there is one first groove 3f, only one-pole electric wire can be wound, so the number is limited to two or more.

  As described above, it is possible to secure a safe distance for the molten solder to rise between the core 5 and the three-layer insulated wire 6, and to provide a winding component having a low height and a small mounting area.

The front view and side view which show the cross section of the coil | winding components of this invention. FIG. 1A is a front view. FIG. 1B is a side view. The figure explaining the safe distance of the core and molten solder part in FIG.1 (b). The figure explaining the safe distance of the core and molten solder part in AA 'sectional drawing of FIG. The figure explaining the safe distance of the core and molten solder part in the side view which shows the cross section of the winding components of a comparative example. FIG. 5 is a view for explaining a safe distance between the core and the molten solder portion in the AA ′ sectional view of FIG. 4. Front sectional drawing which shows the winding components which aimed at size reduction of the conventional vertical winding components.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10 Winding component 2 Electric wire 3 Bobbin 3a Winding part 3B 2nd collar part 3C 1st collar part 3d 1st collar part upper stage part 3e 1st collar part lower stage part 3l 1st collar part Lower step 3b Second step upper step 3b Second step lower step 3f First step 3g Second groove 3h Third step 3i One end 3j Protrusion that has a pin 4 Pin 5 Core 6 Three-layer insulated wire 11 Molten solder portion 12 Primary winding 13 Secondary winding

Claims (9)

A bobbin (3) having a pair of flanges (3C, 3B) facing each other with an annular winding (3a) around which the electric wire (2) is wound, and the pair of flanges (3C, 3B) The core (5) interposed between the upper step (3d, 3k) and the lower step (3e, 3b) of each of the first flange portion (3C) and the second flange portion (3B) constituting the first flange portion (3). ) And a pin (4) erected on the center side of the bottom surface (3e, 3b) of each of the pair of flanges (3C, 3B), and pulled out from the winding (3a) The end of the electric wire (2) is drawn from the upper surface of the upper step (3d) of the first flange (3C), and the side surface of the upper step (3d) of the first flange (3C) Bridging to the upper end of the first flange (3C), and bridging to the upper end of the side of the lower step (3e) of the first flange (3C), the bottom of the lower step (3e) of the first flange (3C) To be fixed to the erected pin (4), a plurality of at least one system coil component composed of a three-layer insulated wire (6) of the wire wound on each line (2), wherein An inverted T-shaped lower island portion (3l) comprising a portion parallel to the direction in which the pin (4) is erected and a portion perpendicular to the direction in which the pin (4) is continued to the parallel portion. A first groove (3e) provided in the lower step (3e) of the first flange (3C) and leading from the center of the upper end of the side of the lower step (3e) of the first flange (3C) to the lower end ( 3f) is provided on the side surface of the lower step portion (3e) of the first flange portion (3C), and the length of the line along the first groove (3f) is the lower step portion of the first flange portion (3C) ( 3e) is longer than the length of the vertical line from the upper end to the lower end of the side surface, and the electric wire (2) is wired along the first groove (3f). Winding parts that. The depth of the first groove (3f) defined by the distance of the vertical straight line from the side surface of the lower step (3e) of the first flange (3C) to the bottom surface of the groove (3f) is 3 longer than the diameter of the layer insulated wire (6), said first lower portion (3e) and said first groove being defined by the distance between the lower islands and (3l) of the collar (3C) ( The winding component according to claim 1, wherein the width of 3f) is longer than the diameter of the three-layer insulated wire (6).   The lower end of the first groove (3f) defined by the vertical straight line distance from the lower end side surface (3e) of the first flange (3C) to the bottom surface of the first groove (3f) The depth is defined by the first groove defined by the distance of the vertical straight line from the upper side surface of the lower step part (3e) of the first flange part (3C) to the bottom surface of the first groove (3f) ( 3. The winding component according to claim 1 or 2, wherein the winding component is longer than the upper end depth of 3f). The pin of the lower part (3e) of the first collar part (3C) from the central part at the upper end of the side surface close to the core (5) of the lower part (3e) of the first collar part (3C) Two or more first grooves (3f) facing both sides of the lower end of the side surface adjacent to (4) are obliquely provided on the side surface of the lower step portion (3e) of the first flange portion (3C), and the first The shortest distance between the center points of the first groove (3f) on both sides of the lower end of the side surface of the lower step portion (3e) of the first flange portion (3C) is the lower step of the first flange portion (3C). The winding component according to any one of claims 1 to 3, wherein the winding component is wider than the shortest distance between the standing points of the two pins (4) on the lower surface of the portion (3e). The height of the bottom surface of the second groove (3g) on the side surface of the upper stage part (3d) of the first collar part (3C) adjacent to the core (5) and the lower stage of the first collar part (3C) The height of the bottom surface of the first groove (3f) on the side surface of the portion (3e) is higher than the height of the side surface of the core (5), and the three-layer insulated wire (6 The winding part according to any one of claims 1 to 4 , wherein an upper stage part (3d) and a lower stage part (3e) of the first flange part (3C) are protruded on the first side. The depth of the second groove (3g) defined by the distance of the vertical straight line from the side surface of the upper step (3d) of the first flange (3C) to the bottom surface of the second groove (3g) is The width of the bottom surface of the second groove (3g) in the upper step (3d) of the first flange (3C) is longer than the diameter of the three-layer insulated wire (6). The winding component according to any one of claims 1 to 5, wherein the winding component is longer than the diameter of the electric wire (6). The first groove (3f) on both sides of the lower end of the side of the lower step (3e) of the first flange (3C) and the lower surface of the lower step (3e) of the first flange (3C) The third groove (3h) connecting the two pins (4) is carved on the lower surface of the lower step (3e) of the first flange (3C) . The winding part according to any one of 6 . The first groove (3f) on both sides of the lower end of the side surface of the lower step (3e) of the first flange (3C) from the shortest distance between the standing points of the two pins (4) The shortest distance between both center points is widened, and the two pins (4) are erected on the lower surface of the lower step (3e) of the first flange (3C) . The winding part according to any one of 7 above. A protrusion (3j) for recessing the pin (4) is protruded on the side of the lower surface (3e) of the first flange (3C) where there is no third groove (3h), and the 3 The layer insulated wire (6) passes through the three types of the second groove (3g), the first groove (3f), and the third groove (3h) and is fixed to the pin (4). The winding component according to any one of claims 1 to 8 .

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