Coil device and transformer device

Abstract

To achieve overall miniaturization while maintaining an insulation distance.SOLUTION: A coil device (100) includes a bobbin (130) having a bobbin core part (131), a coil (180) wound around the bobbin core part (131), a flange part (133) integrally provided with the bobbin core part (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) has a plurality of groove parts (136) for pin terminals formed in a groove shape along the axial direction of the winding core part (131) and a pin fixing part (140) formed in the inner space of the groove parts (136) for pin terminals and fixed together with one end in the pin terminal (P).SELECTED DRAWING: Figure 7

Description

[Technical field]

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

[0002] Conventionally, a bobbin for a coil transformer used as a transformer for electronic devices and the like has been proposed, and has a winding core, an upper flange, a lower flange, and a pin terminal (see, for example, Patent Document 1). In this bobbin for a 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 pull-out groove is formed on the tip surface.

[0003] In this coil transformer bobbin, the copper wire of the inductor winding portion is wound around a winding core, and then the lead wires pulled out from the winding are passed through the lead wire pull-out grooves between the pin terminal embedded portions and entangled with the pin terminals. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-320953 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the coil transformer bobbin of Patent Document 1, the distance between the lead wires becomes short due to a trade-off between the distance between the pin terminals and the diameter of the lead wires, which may cause a short circuit.

[0006] In order to avoid short-circuiting between the lead wires, it is possible to use pin terminals different from the pin terminals that are originally to be connected, thereby ensuring a distance between the pin terminals and avoiding short-circuiting between the lead wires.

[0007] In this case, however, since the number of pin terminals that can be provided in the pin terminal embedding portion is limited, the number of required pin terminals will be insufficient. In order to secure the required number of pin terminals, the size of the pin terminal embedding portion must be increased, which raises the risk of the bobbin itself becoming larger.

[0008] In the coil device and transformer device of the present invention, an example of an object is to provide a coil device and transformer device that can be made smaller overall while ensuring an insulation distance between lead wires. [Means for solving the problem]

[0009] The coil device of the present invention includes a bobbin having a winding core portion, a coil wound around the winding core portion, a flange portion formed integrally with the winding core portion, a pin terminal block formed integrally with the flange portion, a plurality of pin terminals provided at predetermined intervals on the pin terminal block and connected to lead wires of the coil, and a circuit board connected to the plurality of pin terminals, and the pin terminal block has a plurality of pin terminal groove portions formed in a groove shape along the axial direction of the winding core portion, and a pin fixing portion formed in an inner space of the pin terminal groove portion and fixed integrally to one end of the pin terminal. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an overall configuration of a coil device according to an embodiment that is an example of the present invention. [Diagram 2] 1 is an exploded perspective view showing a configuration of a coil device according to an embodiment that is an example of the present invention. [Diagram 3] 1 is a perspective view showing a configuration of a bobbin of a coil device according to an embodiment that is an example of the present invention, as viewed obliquely from above. [Figure 4] 1 is a perspective view showing a configuration of a bobbin of a coil device according to an embodiment that is an example of the present invention, as viewed from the side. [Diagram 5] 1 is a perspective view showing a configuration of a bobbin of a coil device according to an embodiment that is an example of the present invention, as viewed from below. [Figure 6] 1 is a partially enlarged perspective view showing a configuration of a pin terminal block of a bobbin of a coil device according to an embodiment that is an example of the present invention, as viewed from above. FIG. [Figure 7] 1 is a partially enlarged perspective view showing the configuration of a pin terminal block of a bobbin of a coil device according to an embodiment that is an example of the present invention, as viewed from below. FIG. [Figure 8] 1A is a side view illustrating the difference in configuration between a pin terminal block of a coil device according to an embodiment that is one example of the present invention and a pin terminal block of a coil device having a conventional configuration. FIG. [Figure 9] FIG. 1 is a side view illustrating a comparison in height between a coil device according to an embodiment that is an example of the present invention (A) and a coil device having a conventional configuration (B). [Figure 10] 1A is a perspective view showing a state in which lead wires of a coil device according to an embodiment that is an example of the present invention are connected to pin terminals, and FIG. 1B is a perspective view showing a state in which lead wires of a coil device having a conventional configuration are connected to pin terminals. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0012] Fig. 4 is a perspective view showing the configuration of a bobbin of a coil device according to an embodiment which is an example of the present invention when viewed from the side. Fig. 5 is a perspective view showing the configuration of a bobbin of a coil device according to an embodiment which is an example of the present invention when viewed from the bottom. Fig. 6 is a partially enlarged perspective view showing the configuration of a pin terminal block of a bobbin of a coil device according to an embodiment which is an example of the present invention when viewed from the top.

[0013] Fig. 7 is a partially enlarged perspective view showing the configuration of a pin terminal block of a bobbin of a coil device according to an embodiment of the present invention as viewed from below. Fig. 8 is a side view for explaining the difference in configuration between the pin terminal block (A) of a coil device according to an embodiment of the present invention and the pin terminal block (B) of a coil device having a conventional configuration.

[0014] Fig. 9 is a side view illustrating a comparison of the heights of a coil device according to an embodiment of the present invention (A) and a coil device having a conventional configuration (B). Fig. 10 is a perspective view showing a connection state of a lead wire of a coil device according to an embodiment of the present invention (A) to a pin terminal, and a connection state of a lead wire of a coil device having a conventional configuration (B) to a pin terminal.

[0015] In the description of the embodiments of the present invention, for convenience of explanation, the direction of arrow ab is referred to as the up-down direction, the direction of arrow a as the upside or upward, and the direction of arrow b as the downside or downward. The direction of arrow cd is referred to as the depth direction or front-rear direction, the direction of arrow c as the near side or forward, and the direction of arrow d as the far side or rear. Furthermore, the direction of arrow ef is referred to as the left-right direction or horizontal direction, the direction of arrow e as the left side or leftward, and the direction of arrow f as the right side or rightward. However, the up-down direction (the direction of arrow ab), the depth direction (the direction of arrow cd), and the horizontal direction (the direction of arrow ef) are used merely for convenience of explanation and are unrelated to the directions in actual use.

[0016] <Coil device> As shown in Figures 1 and 2, a coil device 100 used in electronic devices, etc., is broadly composed of an upper (arrow a direction) core (hereinafter referred to as the "upper core") 110, a lower (arrow b direction) core (hereinafter referred to as the "lower core") 120, a bobbin 130, and a coil 180, etc.

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

[0018] The upper core 110 has a top plate portion 110a made of a plate-like material that is approximately rectangular when viewed from above, a middle leg portion 110b that is cylindrical and protrudes downward (in the direction of arrow b) from the center of the top plate portion 110a, and side legs 110c and 110d that protrude downward (in the direction of arrow b) from both ends of the top plate portion 110a so as to face each other with the middle leg portion 110b in between.

[0019] The middle leg 110b of the upper core 110 is a portion that is inserted from above (in the direction of arrow a) into a through hole 131h (FIGS. 2 and 3) of a winding core portion 131 of a bobbin 130 described later. The side legs 110c and 110d of the upper core 110 are portions that are arranged to surround the upper flange body 132a from the outer periphery in the radial direction, avoiding the upper protruding portions 132b and 132c of the bobbin 130, when the middle leg 110b is inserted into the through hole 131h of the winding core portion 131.

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

[0021] The lower core 120 has a bottom plate portion 120a consisting of a plate-like member having an approximately rectangular shape when viewed from above, a middle leg portion 120b having a cylindrical shape protruding upward (in the direction of arrow a) from the center of the bottom plate portion 120a, and side legs 120c, 120d protruding upward (in the direction of arrow a) from both ends of the bottom plate portion 120a so as to face each other with the middle leg portion 120b in between.

[0022] The middle leg 120b of the lower core 120 is a portion that is inserted from below (in the direction of arrow b) into a through hole 131h (FIGS. 2 and 3) of a winding core portion 131 of a bobbin 130 described later. The side legs 120c and 120d of the lower core 120 are portions that are arranged to surround the lower flange body 133a from the outer periphery in the radial direction, avoiding the lower protruding portions 133b and 133c of the bobbin 130, when the middle leg 120b is inserted into the through hole 131h of the winding core portion 131. In this case, the lower core 120 has the same shape and size as the upper core 110.

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

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

[0025] Upper flange portion 132 has upper flange body 132a, which is a flange-shaped flange that protrudes in a disk shape from the upper end of winding core portion 131 toward the outer periphery, and upper protrusion portion 132b and upper protrusion portion 132c that are approximately C-shaped in a plan view and are integrally formed on the front side (direction of arrow c) and the rear side (direction of arrow d) of upper flange body 132a in the depth direction (direction of arrow cd).

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

[0027] Lower flange portion 133 has lower flange body 133a, which is a flange-shaped flange that protrudes in a disk shape from the lower end of winding core portion 131 toward the outer periphery, and lower protrusion portion 133b, which is approximately C-shaped in plan view, and lower protrusion portion 133c, which are integrally formed on the front side (direction of arrow c) and the rear side (direction of arrow d) of lower flange body 133a in the depth direction (direction of arrow cd).

[0028] Lower flange body 133a of lower flange portion 133 has the same outer diameter as upper flange body 132a of upper flange portion 132, and is a portion that determines the radial thickness of coil 180 in which the copper wire of coil 180 is wound around winding core portion 131. Lower protrusions 133b and 133c of lower flange portion 133 are portions that fix the position of lower core 120 and serve as grooves for drawing out the copper wire.

[0029] As shown in FIG. 4, lower protrusion 133b and lower protrusion 133c of lower flange 133 have the same height as each other in the up-down direction (arrow ab direction), and are portions to which circuit board 300 (FIG. 9(A)) is abutted and fixed against bottom surfaces 133bu and 133cu, respectively.

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

[0031] That is, when the circuit board 300 is fixed to the bottom surface 133bu of the lower protrusion 133b and the bottom surface 133cu of the lower protrusion 133c, it is fixed in a state in which it is also in contact with the bottom surface 135u of the pin terminal block 135.

[0032] 5 and 6, 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 regular intervals in the horizontal direction (arrow ef direction) perpendicular to the depth direction (arrow cd direction). The number of pin terminals P (P1 to P6) and the number of pin terminal grooves 136 are the same, and correspond to the number of lead wires drawn from the coil 180.

[0033] In this case, the pin terminals P1 to P3 on the left side (in the direction of arrow e) toward the pin terminal block 135 may be referred to as the left pin terminal group PLeft, and the pin terminals P4 to P6 on the right side (in the direction of arrow f) toward the pin terminal block 135 may be referred to as the right pin terminal group PRight.

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

[0035] The plurality of pin terminal grooves 136a to 136f are formed along the axis X of the winding core portion 131 of the bobbin 130 and have a vertically elongated U-shaped cross section (in the direction of the arrow ab).

[0036] A plurality of pin terminal grooves 136a to 136f are formed at regular intervals along the horizontal direction (the direction of the arrow ef), and a plurality of grooves (hereinafter referred to as "lead wire withdrawal grooves") 137a to 137f are formed between each of the pin terminal grooves 136a to 136f, each of which is formed in a groove shape along the axis X direction.

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

[0038] In addition, in the left side pin terminal groove portion 136L, the pin terminal groove portion 136a and the lead wire pull-out groove portion 137a form a pair, the pin terminal groove portion 136b and the lead wire pull-out groove portion 137b form a pair, and the pin terminal groove portion 136c and the lead wire pull-out groove portion 137c form a pair.

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

[0040] As shown in FIG. 5, the pin terminal grooves 136a to 136f are formed to have a greater groove depth in the depth direction (the direction of the arrow cd) than the lead wire withdrawal grooves 137a to 137f.

[0041] Specifically, as shown in FIG. 7, the multiple lead wire withdrawal grooves 137a to 137f are formed to a depth of about half the depth of the pin terminal block 135 in the direction of the arrow cd, whereas the multiple pin terminal grooves 136a to 136f are formed to a depth of more than half the depth of the pin terminal block 135 in the direction of the arrow cd.

[0042] Here, the pin terminal grooves 136a to 136c of the left pin terminal groove 136L have the same shape, so the pin terminal groove 136a will be described below as a representative example. As shown in Fig. 7, the pin terminal groove 136a has a pin fixing part 140a having a substantially rectangular parallelepiped shape that is integrally provided so as to occupy the upper half of the groove space of the pin terminal groove 136a in the vertical direction (the direction of the arrow ab).

[0043] Since the pin fixing portion 140a occupies nearly half of the upper side (in the direction of arrow a) of the groove space of the pin terminal groove portion 136a in the vertical direction (in the direction of arrow ab), its bottom surface 140au is located above (in the direction of arrow a) the bottom surface 135u of the pin terminal block 135.

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

[0045] The pin fixing portion 140a is formed with a recessed groove (hereinafter, referred to as a "lead wire groove") 140am that is slightly recessed from the front side in the depth direction (direction of the arrow cd). The lead wire groove 140am extends along the axis X direction and is shallower than the lead wire drawing groove portion 137a.

[0046] The pin terminal grooves 136b to 136f also have pin fixing portions 140b to 140f, similar to the pin fixing portion 140a of the pin terminal groove 136a, and one end of the pin terminals P2 to P6 is embedded in and fixed integrally to the bottom surfaces 140bu to 140fu of the pin fixing portions 140b to 140f. Furthermore, the pin fixing portions 140b to 140f also have lead wire grooves 140bm to 140fm, similar 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 that form a groove space, and the lower end of the wall adjacent to the lead wire withdrawal groove 137a has a rectangular notch 141a.

[0048] This notch 141a can also be said to be formed at the lower end of the wall adjacent to pin terminal groove 136a, of the two opposing wall portions having a U-shaped cross section that form the groove space of lead wire pull-out groove 137a.

[0049] The notch 141a of the pin terminal groove 136a is formed by cutting out the lower end of the wall to a size that allows the pin terminal groove 136a and the lead wire pull-out groove 137a to spatially communicate with each other. However, this is not limited to this, and the notch 141a may be formed by cutting out the center of the wall, or may be formed as a through hole portion consisting of a through hole instead of the notch 141a, as long as the pin terminal groove 136a and the lead wire pull-out groove 137a communicate with each other. In this way, the pin terminal groove 136a and the lead wire pull-out groove 137a communicate with each other via the notch 141a provided between them.

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

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

[0052] <Effects of the coil device> In the above configuration, as shown in Fig. 8(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 portions 140a to 140f provided in the pin terminal grooves 136a to 136f of the pin terminal block 135. Incidentally, the bobbin 130 in Fig. 8(A) is shown in a state in which the up-down direction (the direction of the arrow ab) is upside down.

[0053] Bottom surfaces 140au to 140fu of the pin fixing portions 140a to 140f are located at a higher position (in the direction of the arrow a) than bottom surface 135u of the pin terminal block 135. In contrast, as shown in Fig. 8(B) , in the pin terminal block 235 of the bobbin 230 having the conventional structure, one end of each of the pin ends P1 to P6 is directly embedded in and fixed to the bottom surface 235u of the pin terminal block 235.

[0054] Therefore, 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 portions 140a to 140f, which are located at a higher position (in the direction of arrow a) than the bottom surface 135u of the pin terminal block 135. Therefore, compared to the conventional bobbin 230, the root portions of the pin terminals P1 to P6 are contained within the groove space of the pin terminal groove portions 136a to 136f and are not exposed to the outside.

[0055] Therefore, for example, as shown in FIG. 9(A), a starting wire 181 of a lead wire drawn out from a coil 180 (FIGS. 1 and 2) wound around the winding core portion 131 of the bobbin 130 passes through the lead wire drawing groove portion 137c, and is led out into the groove space of the pin terminal groove portion 136c via the cutout portion 141c of the pin terminal groove portion 136c, and then is soldered in a wound state to the base portion of the pin terminal P3.

[0056] Similarly, the end wire 182 of the lead wire pulled out from the coil 180 passes through the lead wire pull-out groove 137b, is led out to the pin terminal groove 136b via the notch 141b of the pin terminal groove 136b, and is then soldered in a wound state to the base portion of the pin terminal P2.

[0057] On the other hand, as shown in FIG. 9(B), in the pin terminal block 235 of the conventional bobbin 230, the starting wire 181 of the lead wire pulled out from the coil 180 passes through the lead wire pull-out groove 237c, runs along the bottom surface 235u of the pin terminal block 235, and is soldered in a wound state to the base portion of the pin terminal P3.

[0058] Similarly, the winding end wire 182 of the lead wire drawn out from the coil 180 passes through the lead wire drawing groove 237b, runs along the bottom surface 235u of the pin terminal block 235, and is soldered in a wound state to the base portion of the pin terminal P2.

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

[0060] In this case, if solder portion 181s of winding start wire 181 and solder portion 182s of winding end wire 182 come into contact with the circuit pattern of circuit board 300, a short circuit will occur, and to avoid this, it is necessary to provide a support portion 236 for maintaining a distance between pin terminal block 235 and circuit board 300. For this reason, in a coil device using a conventional bobbin 230, the presence of support portion 236 made it impossible to reduce the height in the up-down direction (the direction of arrow ab).

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

[0062] Therefore, in coil device 100, solder portion 181s of starting wire 181 and solder portion 182s of ending wire 182 in coil 180 are disposed within the groove space of pin terminal grooves 136c and 136b, and are not exposed from bottom surface 135u of pin terminal block 135. Therefore, coil device 100 does not require getter portion 236 as in conventional bobbin 230, and can be made lower in the vertical direction (arrow ab direction) than conventional bobbin 230.

[0063] Furthermore, in conventional bobbin 230, as shown in FIG. 10(B), the distance (spacing) D1 between solder portion 181s of start wire 181 and end wire 182 at bottom surface 235u of pin terminal block 235 is short, making it difficult to ensure an insulation distance.

[0064] However, in the coil device 100, as shown in FIG. 10(A), a wall on which the notch 141c of the pin terminal groove 136c is not provided exists between the solder portion 181s of the start wire 181 in the coil 180 and the end wire 182, and therefore the insulation distance (spatial distance) between the solder portion 181s and the end wire 182 can be increased by the amount of the wall.

[0065] In other words, in the coil device 100, there is no need to increase the distance between the pin terminals P1 to P6, nor is there any need to provide another pin terminal, and the risk of a short circuit between the start wire 181 and the end wire 182 of the coil 180 can be reduced compared to the conventional case.

[0066] Furthermore, in the coil device 100, the solder portion 181s of the starting wire 181 and the solder portion 182s of the ending wire 182 of the coil 180 are arranged within 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 block 135. Therefore, when the circuit board 300 is attached and fixed to the bottom surface 135u of the pin terminal block 135, floating, tilting, rattling, and the like of the circuit board 300 can be eliminated.

[0067] <Other embodiments> Although the coil device 100 has been described as one embodiment of the present invention, the present invention is not limited to the coil device 100 .

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

[0069] In this case, the primary coil and the secondary coil may be wound in the vertical direction (the direction of the arrow ab) around the winding core 131 of the bobbin, with the start and end wires of the primary coil connected to any of the pin terminals P1 to P3 of the left pin terminal groove 136L, and the start and end wires of the secondary coil connected to any of the pin terminals P4 to P6 of the right pin terminal groove 136R. Alternatively, the present invention may be applied to a transformer device in which the primary coil and the secondary coil are wound radially around the winding core portion 131 of the bobbin, the start and end wires of the primary coil are connected to the pin terminals P1 to P6 of the pin terminal groove portion 136, and the start and end wires of the secondary coil are connected to the circuit board 300 by flying wires (aerial wiring).

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

[0071] In the coil device 100 of the present invention, for example, a case has been described in which the winding start wire 181 of the lead wire pull-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 start wire 181 may be led out to the pin terminal groove portion 136c via the lead wire groove 140cm of the pin terminal groove portion 136c, rather than through the lead wire pull-out groove portion 137c.

[0072] In addition, those skilled in the art can appropriately modify the coil device and transformer device of the present invention and change the combination of various components according to conventionally known knowledge. As long as the configuration of the present invention is still provided even after such modifications, it is of course included in the scope of the present invention. [Explanation of symbols]

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

Claims

1. A bobbin having a winding core portion; A coil wound around the winding core; A flange portion provided integrally with the winding core portion; a pin terminal block provided integrally with the flange; a plurality of pin terminals provided at predetermined intervals on the pin terminal block and connected to lead wires of the coil; a circuit board connected to the plurality of pin terminals; Equipped with The pin terminal block includes: a plurality of pin terminal grooves formed in an axial direction of the winding core; a pin fixing portion formed in an inner space of the pin terminal groove portion and fixed integrally to one end of the pin terminal; A coil device comprising:

2. The pin terminal block includes:

2. The coil device according to claim 1, further comprising a plurality of lead wire withdrawal grooves each formed in a groove shape along the axial direction between the plurality of pin terminal grooves.

3. 3. The coil device according to claim 2, wherein the pin terminal groove has two opposing walls having a U-shaped cross section, and the wall adjacent to the lead wire withdrawal groove has a notch or a through hole.

4. The coil device according to claim 2 or 3, wherein the pin terminal groove is deeper than the lead wire withdrawal groove.

5. 3. The coil device according to claim 1, wherein the circuit board is fixed in contact with a bottom surface of the pin terminal block.

6. A bobbin having a winding core portion; a primary coil and a secondary coil wound around the winding core; A flange portion provided integrally with the winding core portion; a pin terminal block provided integrally with the flange; a plurality of pin terminals provided at predetermined intervals on the pin terminal block and connected to lead wires of the primary coil; a circuit board connected to the plurality of pin terminals; Equipped with The pin terminal block includes: a plurality of pin terminal grooves formed in an axial direction of the winding core; a pin fixing portion formed in an inner space of the pin terminal groove portion and fixed integrally to one end of the pin terminal; A transformer device having the above structure.

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