Coil device and transformer device

Abstract

The invention relates to a coil device and a transformer device, which are miniaturized while ensuring an insulation distance. This coil device (100) is provided with: a bobbin (130) having a winding core section (131); a coil (180) wound around the winding core part (131); a flange section (133) provided integrally with the winding core section (131); a pin terminal block (135) provided integrally with the flange part (133); a plurality of pin terminals (P) provided at predetermined intervals on the pin terminal block (135) and connected to a lead wire of the coil (180); and a circuit board (300) connected to the plurality of pin terminals (P), the pin terminal block (135) having: a plurality of pin terminal groove portions (136) formed in a groove shape along the axial direction of the winding core portion (131); and a pin fixing part (140) which is formed in the inner space of the pin terminal groove part (136) and is integrally fixed with one end part of the pin terminal (P).

Description

Technical Field

[0001] The invention relates to a coil device and a transformer device. Background Art

[0002] Conventionally, a bobbin for a coil transformer used as a transformer for electronic equipment or the like has been proposed, the bobbin having a winding core, an upper flange, a lower flange, and a pin terminal (for example, see Patent Document 1). In the bobbin for the coil transformer, a pin terminal embedding portion in which a pin terminal is embedded is provided on the side surface of the lower flange, and a lead wire lead-out groove is formed on the top surface of the pin terminal embedding portion.

[0003] In this coil transformer bobbin, after the copper wire of the winding portion of the inductor is wound around the winding core, the lead wires drawn out from the winding are passed through the lead wire lead-out grooves between the pin terminal embedded portions and are wound around the pin terminals. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 7-320953 Summary of the invention Problems to be solved by the invention

[0005] However, in the bobbin for the coil transformer of Patent Document 1, since the distance between the pin terminals and the wire diameter of the lead wires have to be taken into consideration, the distance between the lead wires becomes close, which may cause a short circuit.

[0006] In order to avoid a short circuit between the leads, it is considered that a distance between the pin terminals is ensured by using a pin terminal different from the pin terminals that are supposed to be connected, thereby avoiding a short circuit between the leads.

[0007] However, in this case, since the number of pin terminals provided in the pin terminal embedding portion is limited, the required number of pin terminals is insufficient. In order to ensure the required number of pin terminals, the size of the pin terminal embedding portion must be enlarged, resulting in the problem of enlarging the size of the winding bobbin itself.

[0008] In the coil device and the transformer device of the present invention, an example of the problem is to provide a coil device and a transformer device that can be made compact as a whole while ensuring the insulation distance between lead wires. Technical Solution

[0009] A coil device of the present invention comprises: a winding bobbin having a winding core; a coil wound on the winding core; a flange portion integrally provided with the winding core; a pin terminal block integrally provided with the flange portion; a plurality of pin terminals arranged on the pin terminal block at prescribed intervals and connected to the leads of the coil; and a circuit substrate connected to the plurality of pin terminals, the pin terminal block having: a plurality of groove portions for pin terminals formed in a groove shape along the axial direction of the winding core; and a pin fixing portion formed in the inner space of the groove portion for pin terminals and integrally fixed to one end of the pin terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a perspective view showing the overall structure of a coil device according to an embodiment as an example of the present invention. Figure 2 It is an exploded perspective view showing the structure of a coil device according to an embodiment as an example of the present invention. Figure 3 It is a perspective view showing the structure of a bobbin of a coil device according to an example embodiment of the present invention when viewed from obliquely above. Figure 4 It is a perspective view showing the structure of a bobbin of a coil device according to an example embodiment of the present invention when viewed from the side. Figure 5 It is a perspective view showing the structure of a bobbin of a coil device according to an embodiment as an example of the present invention when viewed from the bottom. Figure 6 It is a partially enlarged perspective view showing the structure of a pin terminal block of a bobbin of a coil device according to an example embodiment of the present invention when viewed from above. Figure 7 It is a partially enlarged perspective view showing the structure of a pin terminal block of a bobbin of a coil device according to an example embodiment of the present invention when viewed from the bottom. Figure 8 This is a side view for explaining the difference in structure between a pin terminal block (A) of a coil device according to an embodiment of an example of the present invention and a pin terminal block (B) of a coil device having a conventional structure. Fig. 9 This is a side view for explaining a comparison between the height of a coil device (A) according to an embodiment as an example of the present invention and the height of a coil device (B) having a conventional structure. Fig.10 The present invention is a perspective view showing a state where lead wires of a coil device according to an embodiment of the present invention are connected to pin terminals (A) and a state where lead wires of a coil device having a conventional structure are connected to pin terminals (B). DETAILED DESCRIPTION

[0011] Hereinafter, an embodiment as an example of the present invention will be described with reference to the drawings. Figure 1 It is a perspective view showing the overall structure of a coil device according to an embodiment as an example of the present invention. Figure 2 It is an exploded perspective view showing the structure of a coil device according to an embodiment as an example of the present invention. Figure 3 It is a perspective view showing the structure of a bobbin of a coil device according to an example embodiment of the present invention when viewed from obliquely above.

[0012] Figure 4 It is a perspective view showing the structure of a bobbin of a coil device according to an example embodiment of the present invention when viewed from the side. Figure 5 It is a perspective view showing the structure of a bobbin of a coil device according to an embodiment as an example of the present invention when viewed from the bottom. Figure 6 It is a partially enlarged perspective view showing the structure of a pin terminal block of a bobbin of a coil device according to an example embodiment of the present invention when viewed from above.

[0013] Figure 7 It is a partially enlarged perspective view showing the structure of a pin terminal block of a bobbin of a coil device according to an example embodiment of the present invention when viewed from the bottom. Figure 8 This is a side view for explaining the difference in structure between a pin terminal block (A) of a coil device according to an embodiment of an example of the present invention and a pin terminal block (B) of a coil device having a conventional structure.

[0014] Fig. 9 This is a side view for explaining a comparison between the height of a coil device (A) according to an embodiment as an example of the present invention and the height of a coil device (B) having a conventional structure. Fig.10 The present invention is a perspective view showing a state where lead wires of a coil device according to an embodiment of the present invention are connected to pin terminals (A) and a state where lead wires of a coil device having a conventional structure are connected to pin terminals (B).

[0015] It should be noted that, in the description of the embodiments of the present invention, for the convenience of description, the arrow ab directions are referred to as up and down, the arrow a direction is set to the upper side or the upper side, and the arrow b direction is set to the lower side or the lower side. In addition, the arrow cd direction is referred to as the depth direction or the front-back direction, the arrow c direction is referred to as the front side or the front, and the arrow d direction is referred to as the back side or the rear. Furthermore, the arrow ef direction is referred to as the left-right direction or the horizontal direction, the arrow e direction is referred to as the left side or the left side, and the arrow f direction is referred to as the right side or the right side. However, the up-down direction (arrow ab direction), the depth direction (arrow cd direction), and the horizontal direction (arrow ef direction) are only used for the convenience of description and have nothing to do with the direction in actual use.

[0016] <Coil device> like Figure 1 and Figure 2 As shown, a coil device 100 for electronic equipment, etc. is roughly divided into a core on the upper side (in the direction of arrow a) (hereinafter referred to as the "upper core") 110, a core on the lower side (in the direction of arrow b) (hereinafter referred to as the "lower core") 120, a winding tube 130 and a coil 180.

[0017] like Figure 2 As shown, the upper core 110 is a core portion mounted above (in the direction of arrow a) the middle position of the bobbin 130 in the vertical direction (in the direction of arrow ab), and has a substantially E-shape in a side view.

[0018] The upper core 110 comprises: a top plate portion 110a formed by a plate-like member which is roughly rectangular when viewed from above, a middle leg portion 110b formed by a cylindrical shape which protrudes downward (in the direction of arrow b) from the center of the top plate portion 110a, and side leg portions 110c and 110d which protrude downward (in the direction of arrow b) from both ends of the top plate portion 110a in a manner which is opposite to each other and sandwiches the middle leg portion 110b in the middle.

[0019] The middle leg portion 110b of the upper core 110 is inserted from the upper side (in the direction of arrow a) into a through hole 131h ( Figure 2 and Figure 3 The side legs 110c and 110d of the upper core 110 are configured to surround the upper flange body 132a from the radially outer peripheral side so as to avoid the upper protrusion 132b and the upper protrusion 132c of the bobbin 130 when the middle leg 110b is inserted into the through hole 131h of the winding core 131.

[0020] The lower core 120 is a core portion mounted below (in the direction of arrow b) a position that is the middle of the bobbin 130 in the up-down direction (in the direction of arrow ab), and has a substantially E-shape in a side view.

[0021] The lower core 120 comprises: a bottom plate portion 120a formed by a plate-like member which is roughly rectangular when viewed from above, a middle leg portion 120b formed by a cylindrical shape which protrudes upward (in the direction of arrow a) from the center of the bottom plate portion 120a, and side leg portions 120c and 120d which protrude upward (in the direction of arrow a) from both ends of the bottom plate portion 120a in a manner which is opposite to each other and sandwiches the middle leg portion 120b in the middle.

[0022] The middle leg portion 120b of the lower core 120 is inserted from the lower side (in the direction of arrow b) into a through hole 131h ( Figure 2 and Figure 3 The side legs 120c and 120d of the lower core 120 are configured to surround the lower flange body 133a from the radially outer peripheral side while avoiding the lower protrusion 133b and the lower protrusion 133c of the bobbin 130 when the middle leg 120b is inserted into the through hole 131h of the winding core 131. In this case, the lower core 120 has the same shape and the same size as the upper core 110.

[0023] like Figure 3 and Figure 4 As shown, the bobbin 130 is a molded product made of insulating resin, and has a substantially cylindrical winding core 131 , an upper flange 132 , a lower flange 133 , and a pin terminal block 135 provided integrally with the lower flange 133 .

[0024] The winding core 131 has a cylindrical shape with a through hole 131h, and an upper flange 132 is integrally formed at the upper end (hereinafter referred to as the "upper end") of the winding core 131, and a lower flange 133 is integrally formed at the lower end (hereinafter referred to as the "lower end") of the winding core 131. It should be noted that the winding core 131 is not limited to a cylindrical shape, and may also be a square cylindrical shape, etc.

[0025] The upper flange portion 132 includes: an upper flange body 132a which is a flange and protrudes in a disc shape from the upper end portion of the winding core portion 131 toward the outer circumferential direction; an upper side protrusion 132b and an upper side protrusion 132c which are integrally arranged on the front side (in the direction of arrow c) and the inner side (in the direction of arrow d) of the upper flange body 132a in the depth direction (in the direction of arrow cd) and are roughly C-shaped when viewed from above.

[0026] The upper flange body 132a of the upper flange portion 132 is a portion that defines the radial thickness of the coil 180 formed by winding the copper wire of the coil 180 around the winding core portion 131. The upper protrusions 132b and 132c of the upper flange portion 132 are portions that fix the position of the upper core 110 and serve as lead-out grooves for the copper wire.

[0027] The lower flange portion 133 includes: a flange-shaped lower flange body 133a which protrudes in a disc-like manner from the lower end portion of the winding core portion 131 toward the outer circumferential direction, and a lower side protrusion 133b and a lower side protrusion 133c which are integrally provided on the front side (in the direction of arrow c) and the inner side (in the direction of arrow d) of the lower flange body 133a in the depth direction (in the direction of arrow cd) and are roughly C-shaped when viewed from above.

[0028] The lower flange body 133a of the lower flange portion 133 has the same outer diameter as the upper flange body 132a of the upper flange portion 132, and is a portion that defines the radial thickness of the coil 180 formed by winding the copper wire of the coil 180 around the winding core portion 131. The lower protrusion 133b and the lower protrusion 133c of the lower flange portion 133 are portions that fix the position of the lower core 120 and serve as lead-out grooves for the copper wire.

[0029] like Figure 4 As shown, the lower protrusion 133b and the lower protrusion 133c of the lower flange portion 133 have the same height in the up-down direction (arrow ab direction) and are the circuit substrate 300 ( Fig. 9 (A)) The parts are in contact with and fixed to the respective bottom surfaces 133bu and 133cu.

[0030] Furthermore, a pin terminal block 135 is integrally formed on the lower protrusion 133b of the lower flange portion 133 so as to protrude toward the front side (in the direction of arrow c). The pin terminal block 135 is formed in a rectangular parallelepiped shape that is long in the horizontal direction (in the direction of arrow ef) and has the same height as the lower protrusion 133b and the lower protrusion 133c.

[0031] That is, when the circuit board 300 is fixed to the bottom surface 133bu of the lower protruding portion 133b and the bottom surface 133cu of the lower protruding portion 133c, the circuit board 300 is also fixed in a state of abutting against the bottom surface 135u of the pin terminal block 135.

[0032] like Figure 5 and Figure 6 As shown, the pin terminal block 135 has a plurality of (six in this case) grooves (hereinafter referred to as "pin terminal grooves") 136a to 136f corresponding to a plurality of (six in this case) pin terminals P (P1 to P6) arranged at a certain interval in the horizontal direction (arrow cd direction) orthogonal to the depth direction (arrow cd direction). It should be noted that the number of pin terminals P (P1 to P6) is the same as the number of pin terminal grooves 136, which corresponds to the number of lead wires drawn out from the coil 180.

[0033] In this case, the pin terminals P1 to P3 facing the left side of the pin terminal block 135 (direction of arrow e) are sometimes called the left pin terminal group PLeft, and the pin terminals P4 to P6 facing the right side of the pin terminal block 135 (direction of arrow f) are sometimes called the right pin terminal group PRight.

[0034] Similarly, the pin terminal grooves 136a to 136c facing the left side (direction of arrow e) of the pin terminal block 135 are sometimes referred to as the left pin terminal grooves 136L, and the pin terminal grooves 136d to 136f facing the right side (direction of arrow f) of the pin terminal block 135 are sometimes referred to as the right pin terminal grooves 136R.

[0035] The plurality of pin terminal grooves 136 a to 136 f are formed in a U-shaped cross section that is vertically elongated in the up-down direction (directions of arrows ab) along the axis X direction of the winding core 131 of the bobbin 130 .

[0036] A plurality of grooves 136a to 136f for pin terminals are formed at regular intervals along the horizontal direction (direction of arrow ef), and a plurality of grooves (hereinafter referred to as "lead wire lead-out grooves") 137a to 137f are formed in groove shapes along the axis X direction between the grooves 136a to 136f for pin terminals.

[0037] That is, the plurality of pin terminal grooves 136a to 136f and the plurality of lead wire lead-out grooves 137a to 137f are arranged alternately. However, in this case, since the pin terminal groove 136a of the left pin terminal groove 136L is arranged at the leftmost side (arrow e direction) of the pin terminal block 135, and the pin terminal groove 136f of the right pin terminal groove 136R is arranged at the rightmost side (arrow f direction) of the pin terminal block 135, the pin terminal groove 136c and the pin terminal groove 136d are arranged in a state of being adjacent to each other in the central part of the pin terminal block 135.

[0038] It should be noted that, in the left pin terminal groove 136L, the pin terminal groove 136a and the lead wire lead groove 137a form a pair, the pin terminal groove 136b and the lead wire lead groove 137b form a pair, and the pin terminal groove 136c and the lead wire lead groove 137c form a pair.

[0039] Similarly, in the right pin terminal groove 136R, the pin terminal groove 136d and the lead wire lead groove 137d also form a pair, the pin terminal groove 136e and the lead wire lead groove 137e also form a pair, and the pin terminal groove 136f and the lead wire lead groove 137f also form a pair.

[0040] like Figure 5As shown, the groove depth of the plurality of pin terminal grooves 136a to 136f is formed to be deeper than the groove depth of the plurality of lead wire lead grooves 137a to 137f in the depth direction (arrow cd direction).

[0041] Specifically, if Figure 7 As shown, the depth of the multiple lead-out grooves 137a to 137f is formed to be approximately half the depth of the pin terminal block 135 in the depth direction of the pin terminal block 135 (the direction of the arrow cd). Conversely, the depth of the multiple pin terminal grooves 136a to 136f is formed to be approximately more than half the depth of the pin terminal block 135 in the depth direction of the pin terminal block 135 (the direction of the arrow cd).

[0042] Here, since the pin terminal grooves 136a to 136c of the left pin terminal groove 136L have the same shape, the pin terminal groove 136a will be described as a representative. Figure 7 As shown, the pin terminal groove 136a has a substantially rectangular parallelepiped pin fixing portion 140a integrally provided so as to occupy the upper half of the groove space of the pin terminal groove 136a in the up-down direction (arrow ab direction).

[0043] The pin fixing portion 140a occupies nearly half of the upper side (direction of arrow a) of the groove space of the pin terminal groove 136a in the up and down directions (direction of arrow ab), so the bottom surface 140au of the pin fixing portion 140a is located at a position higher than the bottom surface 135u of the pin terminal base 135 (direction of arrow a).

[0044] One end of the pin terminal P1 is fixed integrally and embedded in the bottom surface 140au of the pin fixing portion 140a. The pin terminal P1 is arranged at the center of the bottom surface 140au of the pin fixing portion 140a and does not contact the inner peripheral wall surface of the U-shaped wall forming the pin terminal groove portion 136a.

[0045] In addition, a concave groove (hereinafter referred to as "lead groove") 140am is formed on the pin fixing portion 140a, which is slightly recessed from the front side in the depth direction (arrow cd direction). The lead groove 140am extends in the axis X direction, and the groove depth of the lead groove 140am is formed to be shallower than the groove depth of the lead lead groove portion 137a.

[0046] The pin terminal grooves 136b to 136f also have pin fixing portions 140b to 140f similarly to the pin fixing portion 140a of the pin terminal groove 136a, and one end portion of the pin terminals P2 to P6 is fixed integrally to the bottom surfaces 140bu to 140fu of the pin fixing portions 140b to 140f in a buried state. Furthermore, the pin fixing portions 140b to 140f also have lead wire grooves 140bm to 140fm similarly to the lead wire groove 140am of the pin fixing portion 140a.

[0047] Furthermore, the pin terminal groove 136a has two opposing walls with a U-shaped cross section forming a groove space, and the lower end of one wall adjacent to the lead wire lead groove 137a has a rectangular cutout 141a.

[0048] The cutout 141a can be said to be formed at the lower end of the wall adjacent to the pin terminal groove 136a of the two mutually opposing walls having a U-shaped cross section forming the groove space of the lead wire lead groove 137a.

[0049] The cutout portion 141a of the pin terminal groove portion 136a is formed by cutting the lower end of the wall portion to such an extent that the pin terminal groove portion 136a and the lead wire lead-out groove portion 137a are spatially connected. However, the present invention is not limited thereto, and as long as the pin terminal groove portion 136a and the lead wire lead-out groove portion 137a are connected, the cutout portion 141a may be formed by cutting the central portion of the wall portion, or may be formed as a through hole portion composed of a through hole instead of the cutout portion 141a. In this way, the pin terminal groove portion 136a and the lead wire lead-out groove portion 137a are connected to each other via the cutout portion 141a provided therebetween.

[0050] In the left pin terminal groove 136L, in the pin terminal grooves 136a to 136c, cutouts 141a to 141c are provided on the wall adjacent to the lead wire lead-out grooves 137a to 137c on the right side (in the direction of arrow f) when viewing the pin terminal block 135 from the front side. That is, in the pin terminal grooves 136a to 136c, no cutouts are provided on the wall on the left side (in the direction of arrow e) when viewing the pin terminal block 135 from the front side.

[0051] In the right pin terminal groove 136R, in the pin terminal grooves 136d to 136f, cutouts 141d to 141f are provided on the wall adjacent to the lead wire lead-out grooves 137d to 137f on the left side (in the direction of arrow e) when viewing the pin terminal block 135 from the front side. That is, in the pin terminal grooves 136d to 136f, no cutout is provided on the wall on the right side (in the direction of arrow f) when viewing the pin terminal block 135 from the front side.

[0052] <Effect of coil device> In the above structure, if Figure 8 As shown in (A), in the bobbin 130 of the coil device 100, the pin terminals P1 to P6 are fixed to the bottom surfaces 140au to 140fu of the pin fixing parts 140a to 140f provided in the pin terminal grooves 136a to 136f of the pin terminal base 135. Figure 8 The bobbin 130 of (A) is shown in a state where it is turned upside down in the vertical direction (direction of arrows ab).

[0053] The bottom surfaces 140au to 140fu of the pin fixing portions 140a to 140f are located higher than the bottom surface 135u of the pin terminal block 135 (in the direction of arrow a). Figure 8 As shown in FIG. 5B , in the pin terminal block 235 of the bobbin 230 having a conventional structure, one end portion of the pin terminals P1 to P6 is fixed in a state of being directly embedded in the bottom surface 235 u of the pin terminal block 235 .

[0054] Therefore, in the bobbin 130 of the coil device 100, since the pin terminals P1 to P6 are fixed on the bottom surfaces 140au to 140fu of the pin fixing portions 140a to 140f which are located at a higher position than the bottom surface 135u of the pin terminal block 135 (in the direction of arrow a), the root portions of the pin terminals P1 to P6 are accommodated in the groove spaces of the pin terminal groove portions 136a to 136f and are not exposed to the outside, compared to the conventional bobbin 230.

[0055] So, for example, Fig. 9 As shown in (A), from the coil 180 ( Figure 1 and Figure 2 ) The winding starting wire 181 of the lead wire leads through the lead wire lead-out groove 137c, is led out to the groove space of the pin terminal groove 136c through the cutout portion 141c of the pin terminal groove 136c, and is welded in a state of being wound around the root portion of the pin terminal P3.

[0056] Similarly, in the winding tail wire 182 of the lead wire led out from the coil 180, the winding tail wire 182 also passes through the lead wire lead-out groove 137b, is led out to the pin terminal groove 136b through the cutout portion 141b of the pin terminal groove 136b, and is welded in a state of being wound around the root portion of the pin terminal P2.

[0057] On the other hand, Fig. 9As shown in (B), in the pin terminal block 235 of the conventional bobbin 230, the winding starting wire 181 of the lead wire led out from the coil 180 passes through the lead wire lead-out groove 237c and is welded along the bottom surface 235u of the pin terminal block 235 in a state of being wound around the base portion of the pin terminal P3.

[0058] Similarly, the winding tail wire 182 of the lead wire led out from the coil 180 passes through the lead wire lead-out groove 237 b and is welded along the bottom surface 235 u of the pin terminal base 235 in a state of being wound around the base portion of the pin terminal P2 .

[0059] Therefore, in the conventional bobbin 230 , since the pin terminals P1 to P6 are directly fixed to the bottom surface 235 u of the pin terminal base 235 , the solder portions 181 s and 182 s of the winding start wire 181 and the winding end wire 182 of the coil 180 are exposed from the bottom surface 235 u .

[0060] In this case, a short circuit may occur when the solder portion 181s of the winding start wire 181 and the solder portion 182s of the winding end wire 182 come into contact with the circuit pattern of the circuit substrate 300. Therefore, in order to avoid this, a hollow lead portion 236 is required to maintain the distance between the pin terminal block 235 and the circuit substrate 300. Therefore, in a coil device using a conventional bobbin 230, the height in the vertical direction (the direction of arrows ab) cannot be reduced due to the presence of the hollow lead portion 236.

[0061] On the other hand, Fig. 9 As shown in (A), in the bobbin 130 of the coil device 100, the winding start wire 181 of the coil 180 is welded to the root portion of the pin terminal P3 of the pin fixing portion 140c fixed to the pin terminal groove portion 136c, and the winding end wire 182 of the coil 180 is welded to the root portion of the pin terminal P2 of the pin fixing portion 140b fixed to the pin terminal groove portion 136b.

[0062] Therefore, in the coil device 100, the solder portion 181s of the winding start wire 181 and the solder portion 182s of the winding end wire 182 in the coil 180 are arranged in the groove space of the pin terminal groove portion 136c and the pin terminal groove portion 136b, and are not exposed from the bottom surface 135u of the pin terminal base 135. Therefore, in the coil device 100, the hollow lead portion 236 like the conventional bobbin 230 is not required, and the height in the vertical direction (the direction of arrows ab) can be reduced compared with the conventional bobbin 230.

[0063] In addition, in the conventional bobbin 230, Fig.10As shown in (B), on the bottom surface 235u of the pin terminal block 235, the distance (interval) D1 between the solder portion 181s of the winding start wire 181 and the winding end wire 182 is short, making it difficult to ensure the insulation distance.

[0064] However, in the coil device 100, as Fig.10 As shown in (A), since there is a wall where the cutout portion 141c without the pin terminal groove 136c is not provided between the solder portion 181s of the winding starting line 181 and the winding ending line 182 in the coil 180, the insulation distance (spatial distance) between the solder portion 181s and the winding ending line 182 can be extended by the amount of the wall.

[0065] That is, in the coil device 100, there is no need to increase the distance between the pin terminals P1 to P6, and there is no need to provide other pin terminals. Compared with the past, the risk of short circuit between the winding start line 181 and the winding end line 182 of the coil 180 can be reduced.

[0066] Moreover, in the coil device 100, the solder portion 181s of the winding start wire 181 and the solder portion 182s of the winding end wire 182 in the coil 180 are arranged in the groove space of the pin terminal groove portion 136c and the pin terminal groove portion 136b, and will not be exposed from the bottom surface 135u of the pin terminal block 135. Therefore, when the circuit substrate 300 is assembled and fixed on the bottom surface 135u of the pin terminal block 135, the floating, tilting and shaking of the circuit substrate 300 can also be eliminated.

[0067] <Other Implementation Methods> In the above, in the present invention, the coil device 100 has been described as one embodiment, but the present invention is not limited to the coil device 100 .

[0068] For example, the coil device 100 has a structure in which the single coil 180 is wound around the winding core 131 of the bobbin 130 . However, the present invention may be applied to a transformer device instead of the coil device 100 .

[0069] In this case, it can also be applied to the following transformer device: the primary side coil and the secondary side coil are separately wound in the up and down directions (directions of arrows ab) on the winding core portion 131 of the winding tube, and the winding start wire and the winding end wire of the primary side coil are connected to any one of the pin terminals P1 to P3 of the left pin terminal groove portion 136L, and the winding start wire and the winding end wire of the secondary side coil are connected to any one of the pin terminals P4 to P6 of the right pin terminal groove portion 136R. Alternatively, it can also be applied to the following transformer device: the primary side coil and the secondary side coil are radially wound separately on the winding core portion 131 of the winding tube, the winding start wire and the winding end wire of the primary side coil are connected to the pin terminals P1 to P6 of the pin terminal groove portion 136, and the winding start wire and the winding end wire of the secondary side coil are connected to the circuit substrate 300 through flying wires (aerial wiring).

[0070] In addition, in the bobbin 130 of the coil device 100, the pin terminal block 135 is provided on the lower protrusion 133b of the lower flange portion 133, but the present invention is not limited to this. The pin terminal block can also be provided on the lower protrusion 133c, and the bobbin 130 can also be various other shapes.

[0071] In the coil device 100 of the present invention, for example, a case is described in which the winding starting wire 181 of the lead wire lead-out groove portion 137c is led out to the pin terminal groove portion 136c via the cutout portion 141c, but the present invention is not limited to this, and the winding starting wire 181 can also be led out to the pin terminal groove portion 136c via the lead wire groove 140cm of the pin terminal groove portion 136c instead of the lead wire lead-out groove portion 137c.

[0072] In addition, those skilled in the art can appropriately change the coil device and transformer device of the present invention based on the prior art knowledge, and can also change the combination of various structures. As long as the structure of the present invention is still possessed by such changes, it is naturally included in the scope of the present invention. Description of Reference Numerals

[0073] 100: coil device; 110: upper core; 110a: top plate; 110b: middle leg; 110c, 110d: side leg; 120: lower core; 120a: bottom plate; 120b: middle leg; 120c, 120d: side leg; 130: bobbin; 131: winding core; 132: upper flange (flange); 132a: upper flange body; 132b, 132c: upper protrusion; 133: lower flange (flange); 133a: lower flange body; 133b, 133c: lower protrusion; 135: pin terminal block ; 135u: bottom surface; 131h: through hole; 136a to 136f: groove for pin terminal; 136L: groove for left pin terminal; 136R: groove for right pin terminal; 137a to 137f: lead wire lead-out groove; 140a to 140f: pin fixing portion; 140au to 140fu: bottom surface; 140am to 140fm: lead wire groove; 141a to 141f: cutout portion; 180: coil; P (P1 to P6): pin terminal; PLeft: left pin terminal group; PRight: right pin terminal group.

Claims

1. A coil device, comprising: A bobbin having a winding core; A coil, wound around the winding core; A flange portion, integrally provided with the winding core portion; A pin terminal block is integrally provided with the flange portion; A plurality of pin terminals are provided at predetermined intervals on the pin terminal block and connected to the lead wires of the coil; and A circuit substrate connected to the plurality of pin terminals, The pin terminal block has: A plurality of slots for pin terminals are formed in a slot shape along the axial direction of the winding core; and The pin fixing portion is formed in the inner space of the pin terminal groove portion and is integrally fixed to one end portion of the pin terminal.

2. The coil device according to claim 1, wherein: The pin terminal block has: The plurality of lead wire lead-out grooves are formed in a groove shape along the axial direction between the plurality of pin terminal grooves.

3. The coil device according to claim 2, wherein: The pin terminal groove has two wall portions that are opposed to each other and have a U-shaped cross section, and a cutout portion or a through hole portion is provided in one wall portion that is adjacent to the lead wire lead-out groove portion.

4. The coil device according to claim 2 or 3, wherein: The groove depth of the pin terminal groove is deeper than the groove depth of the lead wire lead-out groove.

5. The coil device according to claim 1 or 2, wherein: The circuit substrate is fixed to the bottom surface of the pin terminal block in an abutting state.

6. A transformer device, comprising: A bobbin having a winding core; The primary coil and the secondary coil are wound around the winding core; A flange portion, integrally provided with the winding core portion; A pin terminal block is integrally provided with the flange portion; A plurality of pin terminals are provided at predetermined intervals on the pin terminal block and are connected to the lead wires of the primary side coil; and A circuit substrate connected to the plurality of pin terminals, The pin terminal block has: A plurality of slots for pin terminals are formed in a slot shape along the axial direction of the winding core; and The pin fixing portion is formed in the inner space of the pin terminal groove portion and is integrally fixed to one end portion of the pin terminal.

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