Noise filter

Abstract

To provide a noise filter which can ensure a space expanding, on a substrate, in the axial direction of a lead wire.SOLUTION: A noise filter 100 comprises a terminal fitting 1, a substrate 2, and a coil 31. The terminal fitting 1 has: an external terminal 11 which can be electrically connected to an external device; a coil connection part 12 which is electrically connected to the coil 31 via a first lead wire 41; and a substrate connection part 13 which is electrically connected to the substrate 2. When a direction perpendicular to the axial direction of the first lead wire 41 and parallel to the substrate 2 is defined as a width direction, the coil connection part 12 extends to the coil 31 side from an end 11d of the external terminal 11 in the axial direction of the first lead wire 41. The substrate connection part 13 is bent to the substrate 2 side from an end 12d of the coil connection part 12 in the axial direction of the first lead wire 41. The terminal fitting 1 has a caulking piece 14 provided on an end in the width direction of the coil connection part 12. The caulking piece 14 caulks one end of the first lead wire 41.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to noise filters. [Background technology]

[0002] The noise filter disclosed in Patent Document 1 includes a terminal fitting. The terminal fitting includes a coil connection portion and a board connection portion. The board connection portion is electrically connected to the board. The coil connection portion is electrically connected to the coil via a lead wire and crimps the lead wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-097601 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application have discovered the following problems. In such a noise filter, the coil connection portion and the board connection portion are integrally formed by bending a single plate. The board connection portion extends from one end and the other end of the coil connection portion in the width direction and bends toward the board. The board connection portion rises from the board and supports the coil connection portion. Furthermore, the board connection portion extends along the axial direction of the lead wire on the board. Therefore, it is difficult to secure a space on the board that extends in the axial direction of the lead wire.

[0005] In view of the above-mentioned problems, an object of the present invention is to provide a noise filter that can secure a space extending in the axial direction of the lead wires on a substrate. [Means for solving the problem]

[0006] The noise filter according to the present disclosure comprises: Terminal fittings, A substrate; a coil mounted on the substrate; the terminal fitting includes an external terminal electrically connectable to an external device, a coil connection portion electrically connected to the coil via a first lead wire, and a board connection portion electrically connected to the board, When a direction perpendicular to the axial direction of the first lead wire and parallel to the substrate is defined as a width direction, the coil connection portion extends from an axial end of the first lead wire of the external terminal toward the coil, the substrate connection portion is bent from an end portion of the coil connection portion in the axial direction of the first lead wire toward the substrate, the terminal fitting includes a crimping piece provided at an end of the coil connection portion in the width direction, The crimping piece crimped one end of the first lead wire.

[0007] In the above-described noise filter, the substrate connection portion includes a plurality of substrate-side terminals electrically connected to the substrate, The plurality of board-side terminals are aligned in the width direction, The length of the board connection portion in the width direction may be shorter than the length of the coil connection portion in the width direction.

[0008] In the above-described noise filter, the crimping piece has a main body and a tip portion, the main body extends from an end of the coil connection portion in the width direction in the axial direction of the first lead wire of the coil connection portion and bends in a direction away from the substrate, The tip portion may extend from the main body in a direction away from the substrate and bend toward the first lead wire in the width direction.

[0009] In the above-described noise filter, the terminal fitting has an expanded shape that is encompassed by a substantially rectangular shape, The external terminal, the coil connecting portion, and the board connecting portion may extend along the longitudinal direction of the substantially rectangular shape in the developed shape of the terminal fitting.

[0010] The noise filter further includes a relay terminal, the relay terminal includes a lead wire relay portion that relays an electrical connection between the first lead wire and the second lead wire, and first and second relay board connection portions that are electrically connected to the board, respectively; the first relay board connection portion extends from one end of the lead wire relay portion in the axial direction of the first lead wire and bends toward the board, the second relay board connection portion extends from the other end of the lead wire relay portion in the axial direction of the first lead wire and bends toward the board, The substrate may include a wiring pattern that crosses the space between the first relay substrate connection portion and the second relay substrate connection portion.

[0011] In the above-described noise filter, the wiring pattern may include a neutral line that crosses a space between the first relay board connection portion and the second relay board connection portion.

[0012] In the above-described noise filter, the relay terminal includes a first relay crimping piece that crimps the other ends of the first and second lead wires, the first intermediate crimping piece has a first base portion, a central portion, and a tip portion; the first base portion is provided at one end of the lead wire relay portion in the width direction, the central portion extends from the first base portion in the axial direction of the first lead wire and bends in a direction away from the substrate, The tip portion may extend from the central portion in a direction away from the substrate and bend toward the first and second lead wires in the width direction.

[0013] In the above-described noise filter, the relay terminal further includes a second relay crimping piece that crimps the other ends of the first and second lead wires, the second relay crimping piece includes a second base portion provided at the other end of the lead wire relay portion in the width direction, the first base portion extends from one end of the lead wire relay portion in the width direction and rises toward the first and second lead wires, the second base portion extends from the other end of the lead wire relay portion in the width direction and rises toward the first and second lead wires, the first and second base portions face each other across a space between the first lead wire and the second lead wire; The first and second base portions may be longer than the distance between the first lead wire and the second lead wire in the axial direction of the first lead wire.

[0014] The noise filter described above includes four of the first lead wires, The coil includes one ring core, When viewing the main surface of the substrate facing the ring core, the four first lead wires are preferably wound around one of the ring cores so that they each extend in a cross shape from the center of the one of the ring cores. [Effects of the Invention]

[0015] The present invention can ensure a space on the board that extends in the axial direction of the lead wires. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing an example of the configuration of a noise filter according to a first embodiment. [Figure 2] 1 is a perspective view showing an example of a configuration of the noise filter according to the first embodiment with the cover removed. FIG. [Figure 3] 1 is a perspective view showing an example of a configuration of the noise filter according to the first embodiment, with a cover and electronic components removed. [Figure 4] 1 is a top view showing an example of the configuration of the noise filter in accordance with Embodiment 1, with a cover and electronic components removed. [Figure 5] 2 is a top view showing a coil of one configuration example of the noise filter according to the first embodiment. FIG. [Figure 6] 3 is a bottom view showing a coil of one configuration example of the noise filter according to the first embodiment. FIG. [Figure 7] 2 is a perspective view showing a terminal block and its periphery in one configuration example of the noise filter according to the first embodiment. FIG. [Figure 8] FIG. 2 is an exploded perspective view of the terminal fitting according to the first embodiment. [Figure 9] 1 is a top view showing a terminal fitting and its periphery according to the first embodiment. FIG. [Figure 10] 3 is a bottom view showing the board-side terminal of the terminal fitting and its periphery according to the first embodiment. FIG. [Figure 11] 3A and 3B are diagrams showing the developed shape of the terminal fitting according to the first embodiment. [Figure 12] 4A and 4B are diagrams showing the developed shape of the terminal fitting according to the first embodiment on a plate material. [Figure 13] FIG. 2 is a perspective view showing a relay terminal according to the first embodiment. [Figure 14] 3 is a top view showing a relay terminal and its periphery according to the first embodiment. FIG. [Figure 15] 4 is a bottom view showing the relay board connecting portion of the relay terminal and its periphery according to the first embodiment. FIG. [Figure 16] 3 is a bottom view showing a wiring pattern of a substrate of the noise filter according to the first embodiment. FIG. [Figure 17] FIG. 10 is a perspective view showing a modified example of the relay terminal according to the first embodiment. [Figure 18] 10 is a top view showing a modified example of the relay terminal according to the first embodiment and its periphery. FIG. [Figure 19] 10A and 10B are diagrams illustrating a developed shape of a modified example of the relay terminal according to the first embodiment. [Figure 20] 1 is a circuit diagram of a configuration example of a noise filter according to a first embodiment. [Figure 21] 1 is a top view showing components in a circuit of an example configuration of the noise filter according to the first embodiment. FIG. [Figure 22] FIG. 10 is a perspective view showing a terminal fitting according to a related art. [Figure 23]FIG. 10 is a top view showing a terminal fitting and its surroundings according to a related art. [Figure 24] FIG. 10 is a bottom view showing the board-side terminal of the terminal fitting according to the related art and its surroundings. [Figure 25] 10A and 10B are diagrams showing the developed shape of a terminal fitting according to a related art; [Figure 26] 10A and 10B are diagrams showing the developed shape of a terminal fitting according to a related art on a plate material. DETAILED DESCRIPTION OF THE INVENTION

[0017] (Related Technology) Prior to describing the embodiments, related techniques will be described with reference to FIGS.

[0018] 22 includes an external terminal 911, a coil connection portion 912, and board connection portions 913A and 913B. A portion of the external terminal 911, the coil connection portion 912, and the board connection portions 913A and 913B are integrally formed by molding a single plate-like body.

[0019] The board connection portions 913A and 913B extend from one end 912b and the other end 912c in the width direction (here, the Y-axis direction) of the coil connection portion 912 and bend toward the board (here, the negative Z-axis direction). The board connection portions 913A and 913B rise from the board and extend along the axial direction of the lead wire (here, the X-axis direction). The board connection portions 913A and 913B are disposed below the coil connection portion 912 on the board. Therefore, the space SP9 below the coil connection portion 912 on the board is reduced in the axial direction of the lead wire.

[0020] Terminal fittings 91a and 91b shown in Fig. 23 are an example of the terminal fitting 91 shown in Fig. 22. Terminal fittings 91a and 91b are arranged on substrate 902 with a distance W911 between them. Terminal fittings 91a and 91b each have a width W945. Width W945 is the length of terminal fittings 91a and 91b in the width direction (here, the Y-axis direction).

[0021] As shown in FIG. 24, on the lower surface 902a of the substrate 902, solder layers 98a are formed on the board-side terminals 913c and 913d of the terminal fitting 91a. Furthermore, solder layers 98b are formed on the board-side terminals 913c and 913d of the terminal fitting 91b. The length W98 of the solder layers 98a and 98b in the width direction (here, the Y-axis direction) is longer than the width W945 between the terminal fittings 91a and 91b. Therefore, the distance W988 between the solder layers 98a and 98b is shorter than the distance W911 between the terminal fittings 91a and 91b. Therefore, the arrangement of the terminal fittings 91a and 91b needs to be determined based on the distance W988 between the solder layers 98a and 98b. In other words, it is difficult to shorten the distance W911 between the terminal metal fittings 91a and 91b while ensuring insulation between the terminal metal fittings 91a and 91b.

[0022] The unfolded shape E91 shown in FIG. 25 is the shape of the terminal fitting 91 shown in FIG. 22 unfolded on a predetermined plane (here, the XY plane). The workpiece WK9 shown in FIG. 26 is a substantially rectangular plate having a width WW and a length LL. The unfolded shape E91 is encompassed by the main surface of the workpiece WK9. The unfolded shape E91 is encompassed by a substantially rectangular shape. In the unfolded shape E91 of the terminal fitting 91, the external terminal 911 and the coil connection portion 912 extend along the short-side direction of the workpiece WK9 (here, the X-axis direction). Meanwhile, the board connection portions 913A and 913B extend along the longitudinal direction of the workpiece WK9 (here, the Y-axis direction). In addition, it is preferable that multiple unfolded shapes E91 are arranged side by side in the longitudinal direction of the workpiece WK9 on the main surface of the workpiece WK9. In the example shown in FIG. 26, three unfolded shapes E91 can be arranged on the workpiece WK9. In other words, three terminal fittings 91 can be obtained from one workpiece WK1. Since a certain amount of waste is maintained in the work, there is room for consideration of yield.

[0023] Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. In addition, the following description and drawings have been simplified as appropriate for clarity of explanation.

[0024] (Embodiment 1) The configuration of the noise filter according to the first embodiment will be described with reference to FIGS.

[0025] Fig. 1 is a perspective view showing an example of the configuration of a noise filter according to embodiment 1. Fig. 2 is a perspective view showing an example of the configuration of the noise filter shown in Fig. 1 with a lid removed. Fig. 3 is a perspective view showing an example of the configuration of the noise filter shown in Fig. 1 with a lid and electronic components removed.

[0026] Naturally, the right-handed XYZ coordinate system shown in Figure 1 and other drawings is for the convenience of explaining the positional relationships of the components. Normally, the positive direction of the Z axis is vertically upward, and the XY plane is a horizontal plane, which is common among the drawings.

[0027] 1 to 3, the noise filter 100 includes a terminal fitting 1, a substrate 2, and coils 31 and 32. The noise filter 100 according to this embodiment further includes an electronic component 5, a resistor 5a, a terminal block 6, and a metal case 7.

[0028] The metal case 7 houses the coils 31, 32 and the electronic component 5. The metal case 7 covers at least a portion of the terminal fittings 1, the substrate 2, and the terminal block 6. The metal case 7 may have openings. It is preferable that at least a portion of the terminal fittings 1 and the terminal block 6 are exposed through the openings. An example of the metal case 7 shown in FIG. 1 is a substantially rectangular parallelepiped.

[0029] The metal case 7 includes a bottom plate 71 and a lid 72. The bottom plate 71 supports the substrate 2. The lid 72 is provided on the bottom plate 71 in a detachable manner.

[0030] The substrate 2 has a predetermined printed wiring pattern. An example of the printed wiring pattern will be described later. The substrate 2 carries coils 31 and 32. The coil 31 is electrically connected to the terminal fitting 1 via a first lead wire 41. The coil 32 is electrically connected to the terminal fitting 1 via a second lead wire 42. The relay terminal 21 relays the electrical connection between the first lead wire 41 and the second lead wire 42. The terminal fitting 1, the coils 31 and 32, the electronic component 5, and the resistor 5a are electrically connected to each other via the printed wiring pattern of the substrate 2. The first lead wire 41 and the second lead wire 42 may include multiple wires.

[0031] (internal) Next, the details of the interior of one configuration example of the noise filter 100 will be described with reference to Fig. 4 to Fig. 7. Fig. 4 is a top view showing one configuration example of the noise filter shown in Fig. 1 with the cover and electronic components removed. Fig. 5 is a top view showing a coil of one configuration example of the noise filter shown in Fig. 1. Fig. 6 is a bottom view showing the coil shown in Fig. 5. Fig. 7 is a perspective view showing a terminal block and its periphery of one configuration example of the noise filter shown in Fig. 1.

[0032] As shown in FIG. 4, terminal fittings 1a, 1b, 1c, 1d, 1e, 1f, 1g, and 1h, an electronic component 5, and a resistor 5a are mounted on a substrate 2. The terminal fittings 1a to 1h are an example of the terminal fitting 1 shown in FIG. 2. The substrate 2 is an example of a substantially rectangular plate. The terminal fittings 1a, 1b, 1c, and 1d are arranged at one end of the substrate 2 in the longitudinal direction (here, the X-axis direction). The terminal fittings 1a, 1b, 1c, and 1d are lined up in this order in the lateral direction of the substrate 2 (here, the Y-axis direction). The terminal fittings 1e, 1f, 1g, and 1h are arranged at the other end of the substrate 2 in the longitudinal direction. The terminal fittings 1e, 1f, 1g, and 1h are lined up in this order in the lateral direction of the substrate 2. Coils 31 and 32 are arranged at a predetermined interval in the longitudinal direction of the substrate 2 between the terminal fittings 1a, 1b, 1c, and 1d and the terminal fittings 1e, 1f, 1g, and 1h. The relay terminals 21a, 21b, 21c, and 21d are arranged in this order in the short-side direction of the substrate 2 between the coil 31 and the coil 32.

[0033] Terminal fitting 1a is electrically connected to coil 31 via first lead wire 41a. Similarly, terminal fittings 1b, 1c, and 1d are electrically connected to coil 31 via first lead wires 41b, 41c, and 41d, respectively. First lead wires 41a to 41d are an example of first lead wire 41 shown in FIG. 2. First lead wires 41a, 41b, 41c, and 41d are arranged in parallel on substrate 2 in the short direction of substrate 2. First lead wire 41a extends in the longitudinal direction of substrate 2 near terminal fitting 1a. Similarly, first lead wires 41b to 41d extend in the longitudinal direction of substrate 2 near terminal fittings 1b to 1d, respectively. Terminal fitting 1e is electrically connected to coil 32 via second lead wire 42a. Similarly, terminal fittings 1f, 1g, and 1h are electrically connected to coil 32 via second lead wires 42b, 42c, and 42d, respectively. Second lead wires 42a to 42d are an example of second lead wire 42 shown in FIG. 2. Second lead wires 42a, 42b, 42c, and 42d are arranged in parallel on substrate 2 in the short direction of substrate 2. Second lead wire 42a extends in the longitudinal direction of substrate 2 near terminal fitting 1e. Similarly, second lead wires 42b to 42d extend in the longitudinal direction of substrate 2 near terminal fittings 1f to 1h, respectively.

[0034] Relay terminal 21a relays the electrical connection between first lead wire 41a and second lead wire 42a. Similarly, relay terminal 21b relays the electrical connection between first lead wire 41b and second lead wire 42b. Furthermore, relay terminal 21c relays the electrical connection between first lead wire 41c and second lead wire 42c. Furthermore, relay terminal 21d relays the electrical connection between first lead wire 41d and second lead wire 42d.

[0035] The electronic components 5 are arranged in the longitudinal direction of the substrate 2, at both ends in the short-side direction of the substrate 2. The electronic components 5 are, for example, capacitors. The resistors 5a are arranged in the longitudinal direction of the substrate 2 between the electronic component 5 and the first lead wire 41a, the second lead wire 42a, the first lead wire 41d, or the second lead wire 42d.

[0036] As shown in FIGS. 4 and 5, the coil 31 includes a ring core 31a. When viewed from the main surface of the substrate 2 facing the ring core 31a, the first lead wires 41a, 41b, 41c, and 41d are wound around one ring core 31a so that they extend in a cross shape from the center of the ring core 31a. When viewed from the main surface of the substrate 2 facing the ring core 31a, the first lead wires 41a, 41b, 41c, and 41d extend in the ring core 31a so that they intersect with adjacent first lead wires 41a, 41b, 41c, and 41d at the center of the ring core 31a. In the ring core 31a, the first lead wires 41a and 41c face each other. The first lead wires 41b and 41d face each other. The first lead wires 41a, 41b, 41c, and 41d and the opposing first lead wires 41a, 41b, 41c, and 41d preferably extend on a straight line passing through the center of the ring core 31a. For example, the first lead wires 41a and 41c preferably extend on a straight line passing through the center of the ring core 31a. The first lead wire 41a is adjacent to the first lead wires 41b and 41d. The angles formed by the intersection of the first lead wires 41a, 41b, 41c, and 41d with the adjacent first lead wires 41a, 41b, 41c, and 41d are preferably right angles. For example, the angles formed by the intersection of the first lead wire 41a with the adjacent first lead wires 41b and 41d are preferably right angles. For example, it is preferable that the angle formed by the intersection of the first lead wire 41a and the adjacent first lead wires 41b and 41d is a right angle. By winding the first lead wires 41a, 41b, 41c, and 41d in this manner, it is possible to prevent the first lead wires 41a to 41d from crossing each other and to provide a distance between the adjacent first lead wires 41a to 41d. This ensures mutual insulation between the first lead wires 41a to 41d.

[0037] Similarly, the coil 32 includes a ring core 32a. When viewed from the main surface of the substrate 2 facing the ring core 32a, the second lead wires 42a, 42b, 42c, and 42d are wound around one ring core 32a so that they extend in a cross shape from the center of the ring core 32a. When viewed from the main surface of the substrate 2 facing the ring core 32a, the second lead wires 42a, 42b, 42c, and 42d extend in the ring core 32a so that they intersect with adjacent second lead wires 42a, 42b, 42c, and 42d at the center of the ring core 32a. In the ring core 32a, the second lead wires 42a and 42c face each other. The second lead wires 42b and 42d face each other. The second lead wires 42a, 42b, 42c, and 42d and the opposing second lead wires 42a, 42b, 42c, and 42d preferably extend on a straight line passing through the center of the ring core 32a. For example, the second lead wires 42a and 42c preferably extend on a straight line passing through the center of the ring core 32a. The second lead wire 42a is adjacent to the second lead wires 42b and 42d. The angles formed by the intersection of the second lead wires 42a, 42b, 42c, and 42d with the adjacent second lead wires 42a, 42b, 42c, and 42d are preferably right angles. For example, the angles formed by the intersection of the second lead wire 42a with the adjacent second lead wires 42b and 42d are preferably right angles. For example, the angle formed by the intersection of the second lead wire 42a and the adjacent second lead wires 42b, 42d may be a right angle. By winding the second lead wires 42a, 42b, 42c, and 42d in this manner, the second lead wires 42a to 42d are prevented from crossing each other and a distance can be maintained between the adjacent second lead wires 42a to 42d. This ensures mutual insulation between the second lead wires 42a to 42d.

[0038] Fig. 7 is a perspective view showing the terminal block and its periphery of one configuration example of the noise filter shown in Fig. 3. Note that in Fig. 7, the coil 31, the first lead wires 41a, 41b, 41c, and 41d, the electronic component 5, and the lid 72 are not shown.

[0039] As shown in FIG. 7, the terminal block 6 and the substrate 2 are stacked on an end 71a of the bottom plate 71. The terminal block 6 includes a terminal holder 6a, a flange 6b, and a groove 6c. The terminal block 6 includes at least one terminal holder 6a, which holds a terminal fitting 1. Note that a large current may flow through the coil 31 and the first lead wires 41a, 41b, 41c, and 41d shown in FIG. 4. Therefore, it is preferable that the coil 31 and the first lead wires 41a, 41b, 41c, and 41d are thick and resistant to deformation. Therefore, it is preferable to align the height of the terminal holder 6a with the positions of the coil connection portion 12 and the first lead wires 41a, 41b, 41c, and 41d, because this facilitates electrical connection between the coil connection portion 12, the first lead wires 41a, 41b, 41c, and 41d, and the coil 31. The flange 6b extends from the bottom of the terminal block 6. The flange 6b of the terminal block 6, the board 2, and the end 71a of the bottom plate 71 are fastened together with bolts 6d. The bottom plate 71, the board 2, and the terminal block 6 are stacked in this order. The groove 6c may have a shape that can fit into the opening of the lid 72 of the metal case 7. A transparent cover 61 is provided above the terminal holding portion 6a of the terminal block 6.

[0040] (Terminal fittings) Next, the terminal fittings will be described with reference to Figs. 8 to 12. Fig. 8 is an exploded perspective view of the terminal fitting shown in Fig. 7. Fig. 9 is a top view showing the terminal fitting and its periphery shown in Fig. 4, and is an enlarged view of area A9. Fig. 10 is a bottom view showing the board-side terminal of the terminal fitting shown in Fig. 8 and its periphery. In other words, Fig. 10 is a view of the terminal fitting and its periphery shown in Fig. 9 as viewed from below the board 2. Fig. 11 is a view showing the developed shape of the terminal fitting shown in Fig. 8. Fig. 12 is a view showing the developed shape of the terminal fitting shown in Fig. 8 in a plate material.

[0041] As shown in Fig. 8, the terminal fitting 1 includes an external terminal 11, a coil connection portion 12, and a board connection portion 13. An example of a portion of the external terminal 11, the coil connection portion 12, and the board connection portion 13 shown in Fig. 8 is formed integrally by molding a single plate-like body.

[0042] An example of the terminal fitting 1 shown in FIG. 8 extends in a substantially L-shape that is upside down and left and right on the front surface (here, the ZX plane) of the noise filter 100 shown in FIG. 7. The external terminal 11 is electrically connectable to an external device. The coil connection portion 12 is electrically connected to the coil 31 via the first lead wire 41 shown in FIG. 3. The board connection portion 13 is electrically connected to the board 2. The external terminal 11 is located in the terminal holding portion 6a of the terminal block 6 shown in FIG. 7. The coil connection portion 12 is located on the coil 31 side of the terminal block 6 (here, in the positive direction of the X-axis). The coil connection portion 12 extends from an end 11d in the axial direction of the first lead wire 41 (here, in the X-axis direction) from the external terminal 11 to the coil 31 side. The board connection portion 13 bends from an end 12d of the coil connection portion 12 in the axial direction of the first lead wire 41 toward the board 2 (here, in the negative direction of the Z-axis). This eliminates the need to arrange components such as the board connection portion 13 below the coil connection portion 12 on the board 2. Therefore, a space SP1 extending in the axial direction of the first lead wire 41 can be secured below the coil connection portion 12 on the board 2. The space SP1 is longer in the axial direction of the first lead wire 41 than the space SP9 shown in FIG. 22 and other figures. Therefore, the terminal fitting 1 can secure a longer space in the axial direction of the first lead wire 41 below the coil connection portion 12 on the board 2 than the terminal fitting 91. One specific example of the board 2 shown in FIG. 16 has a wiring pattern P1. The wiring pattern P1 includes a wiring pattern P1a and a wiring pattern P1b. The wiring pattern P1b may be able to cross the space SP1 between the terminal block 6 and board-side terminals 13b and 13c (described later) of the board connection portion 13.

[0043] The external terminal 11 has a hole 11c. The hole 11c has a female thread portion. The external terminal 11 is provided with a male screw 11a and a washer 11b. The male screw 11a passes through the washer 11b and fastens to the female thread portion of the hole 11c. The washer 11b is supported by a spring (not shown). When the male screw 11a is loosened, the washer 11b is pushed upward by the spring (not shown), and the male screw 11a moves upward due to the pressure of the washer 11b. A washer such as a spring washer or a flat washer may be provided between the male screw 11a and the washer 11b. A connecting wire (not shown) is sandwiched between the washer 11b and the external terminal 11, and the male screw 11a is fastened to the washer 11b. The external terminal 11 can then be electrically connected to an external device (not shown) via the connecting wire. The external device is, for example, a power supply.

[0044] The coil connection portion 12 includes a lead wire holding portion 12a and crimping pieces 14 and 15. The crimping pieces 14 and 15 crimp the first lead wire 41. Here, the direction perpendicular to the axial direction of the first lead wire 41 and parallel to the substrate 2 is defined as the width direction (here, the Y-axis direction). The crimping piece 14 is provided at one end 12b of the coil connection portion 12 in the width direction. The crimping piece 15 is provided at the other end 12c of the coil connection portion 12 in the width direction. While the lead wire holding portion 12a holds one end of the first lead wire 41, the crimping pieces 14 and 15 are bent toward the lead wire holding portion 12a.

[0045] The crimping piece 14 includes a main body 14a and a tip portion 14b. The main body 14a extends from one end portion 12b of the coil connection portion 12 in the width direction in the axial direction of the first lead wire 41 of the coil connection portion 12 (here, the positive direction of the X-axis) and bends in a direction away from the substrate 2 (here, the positive direction of the Z-axis). The tip portion 14b extends from the main body 14a in a direction away from the substrate 2 and bends toward the first lead wire 41 in the width direction (here, the positive direction of the Y-axis). The lead wire holding portion 12a and the crimping piece 14 fasten the first lead wire 41 to fix it. Because the main body 14a and the tip portion 14b bend in different directions, the base of the crimping piece 14 is twisted. This reduces the bending radius of the crimping piece 14, making it difficult for the crimping piece 14 to separate from the lead wire holding portion 12a. As a result, the crimping piece 14 can firmly fix the first lead wire 41 to the lead wire holding portion 12a.

[0046] Similarly, the crimping piece 15 has a main body 15a and a tip portion 15b. The main body 15a extends from the other end portion 12c of the coil connection portion 12 in the width direction in the axial direction of the first lead wire 41 of the coil connection portion 12 and bends in a direction away from the substrate 2. The tip portion 15b extends from the main body 15a in a direction away from the substrate 2 and bends toward the first lead wire 41 in the width direction (here, in the negative direction of the Y axis). The lead wire holding portion 12a and the crimping piece 15 fasten the first lead wire 41 to fix it. Because the main body 15a and the tip portion 15b bend in different directions, the base of the crimping piece 15 is twisted. This reduces the bending radius of the crimping piece 15, making it difficult for the crimping piece 15 to separate from the lead wire holding portion 12a. As a result, the crimping piece 15 can firmly fix the first lead wire 41 to the lead wire holding portion 12a.

[0047] The board connection portion 13 includes a wall portion 13a and board-side terminals 13b and 13c. The board connection portion 13 may include a plurality of board-side terminals. The board-side terminals 13b and 13c are electrically connected to the board 2. The board-side terminals 13b and 13c are aligned in the width direction (here, the Y-axis direction). The maximum width direction length W13 of the board connection portion 13 is shorter than the maximum width direction length W45 of the coil connection portion 12. The board connection portion 13 may be soldered to the board 2 shown in FIG. 7. Specifically, the board-side terminals 13b and 13c protrude downward (here, in the negative Z-axis direction) from the wall portion 13a. The board-side terminals 13b and 13c pass through holes in the board 2 and are soldered to the board 2.

[0048] 9, terminal fittings 1a and 1b are arranged on substrate 2 with a distance W11 between them. Terminal fittings 1a and 1b each have a width W45. Width W45 is the length of terminal fittings 1a and 1b in the width direction.

[0049] As shown in FIG. 10 , a solder layer 8a is formed on the board-side terminals 13b and 13c of the terminal fitting 1a on the lower surface 2a of the substrate 2. A solder layer 8b is also formed on the board-side terminals 13b and 13c of the terminal fitting 1b. The widthwise length W8 of the solder layers 8a and 8b is shorter than the width W45 between the terminal fittings 1a and 1b. Therefore, the distance W88 between the solder layers 8a and 8b is longer than the distance W11 between the terminal fittings 1a and 1b. Therefore, the distance W11 between the terminal fittings 1a and 1b can be shortened while ensuring insulation between the terminal fittings 1a and 1b. This increases the density of the components of the noise filter 100, thereby enabling the noise filter 100 to be made more compact.

[0050] The unfolded shape E1 shown in FIG. 11 is a shape obtained by unfolding the terminal fitting 1 shown in FIG. 8 on a predetermined plane (here, the XY plane). The unfolded shape E1 is encompassed by a substantially rectangular shape. In the unfolded shape E1, the external terminal 11, the coil connection portion 12, and the board connection portion 13 extend along the longitudinal direction of the substantially rectangular shape (here, the X-axis direction). The workpiece WK1 shown in FIG. 12 is a substantially rectangular plate having a width WW and a length LL, and is the same size as the workpiece WK9 shown in FIG. 26. The workpiece WK1 is made of the same type of metal material as the metal material constituting the terminal fitting 1. The workpiece WK1 may be an original metal plate. The unfolded shape E1 is encompassed by the main surface of the workpiece WK1. The external terminal 11, the coil connection portion 12, and the board connection portion 13 extend along the short-side direction of the workpiece WK1 (here, the X-axis direction). Furthermore, it is preferable that multiple unfolded shapes E1 are arranged side by side in the longitudinal direction (here, the Y-axis direction) of the workpiece WK1 on the main surface of the workpiece WK1. In the example shown in FIG. 12, ten unfolded shapes E1 can be arranged on the workpiece WK1. In other words, ten terminal fittings 1 can be obtained from one workpiece WK1. This may allow more terminal fittings to be obtained from one workpiece than in the examples shown in FIGS. 25 and 26. In other words, it is possible to reduce waste in the workpiece and increase yield.

[0051] (Relay terminal) Next, the relay terminal will be described with reference to Figs. 13 to 16. Fig. 13 is a perspective view showing the relay terminal shown in Fig. 4. Fig. 14 is a top view showing the relay terminal and its periphery shown in Fig. 4, and is an enlarged view of area A14. Fig. 15 is a bottom view showing the relay board connecting portion of the relay terminal shown in Fig. 13 and its periphery. In other words, Fig. 15 is a view of the terminal fitting and its periphery shown in Fig. 14, viewed from below the board 2. Fig. 16 is a bottom view showing the wiring pattern of the board of the noise filter according to embodiment 1.

[0052] 13, the relay terminal 21 includes a lead wire relay portion 211, a first relay board connecting portion 212, and a second relay board connecting portion 213. An example of the lead wire relay portion 211, the first relay board connecting portion 212, and the second relay board connecting portion 213 shown in FIG. 13 is formed integrally by molding a single plate-like body.

[0053] 13 extends in a generally upside-down U-shape on the front surface (here, the ZX plane) of the noise filter 100 shown in FIG. 3. The first relay board connecting portion 212 extends from one end 211b of the lead wire relay portion 211 in the axial direction of the first lead wire 41 (here, the X-axis direction) and bends toward the board 2 (here, the negative Z-axis direction). The second relay board connecting portion 213 extends from the other end 211c of the lead wire relay portion 211 in the axial direction of the first lead wire 41 and bends toward the board 2.

[0054] The lead wire relay portion 211 relays the electrical connection between the first lead wire 41 and the second lead wire 42. An example of the lead wire relay portion 211 shown in FIG. 13 includes a lead wire holding portion 211a, a first relay crimping piece 214, and a second relay crimping piece 215. The first relay crimping piece 214 and the second relay crimping piece 215 crimp the first lead wire 41 and the second lead wire 42 together. The other end of the first lead wire 41 and the other end of the second lead wire 42 may be soldered as appropriate. The first relay crimping piece 214 is provided at one end 211d of the lead wire relay portion 211 in the width direction (here, the Y-axis direction). The second relay crimping piece 215 is provided at the other end 211e of the lead wire relay portion 211 in the width direction. While the lead wire holding portion 211a holds the other end of the first lead wire 41 and the other end of the second lead wire 42, the first intermediate crimping piece 214 and the second intermediate crimping piece 215 are bent toward the lead wire holding portion 211a.

[0055] The first relay crimping piece 214 includes a first base portion 214a, a central portion 214b, and a tip portion 214c. The first base portion 214a is provided at one end portion 211d of the lead wire relay portion 211 in the width direction. The central portion 214b extends from the first base portion 214a in the axial direction of the first lead wire 41 (here, the X-axis direction) and bends in a direction away from the substrate 2 (here, the positive Z-axis direction). The tip portion 214c extends from the central portion 214b in a direction away from the substrate 2 and bends toward the first lead wire 41 and the second lead wire 42 in the width direction (here, the positive Y-axis direction). The lead wire holding portion 211a and the first relay crimping piece 214 fasten and fix the first lead wire 41 and the second lead wire 42. The central portion 214b and the tip portion 214c bend in different directions, twisting the base of the first intermediate crimping piece 214. This reduces the bending radius of the first intermediate crimping piece 214, making it difficult for the first intermediate crimping piece 214 to separate from the lead wire holding portion 211a. As a result, the first intermediate crimping piece 214 can firmly fix the first lead wire 41 and the second lead wire 42 to the lead wire holding portion 211a.

[0056] Similarly, the second relay crimping piece 215 has a second base portion 215a, a central portion 215b, and a tip portion 215c. The second base portion 215a is provided at the other end portion 211e of the lead wire relay portion 211 in the width direction. The central portion 215b extends from the second base portion 215a in the axial direction of the first lead wire 41 and bends in a direction away from the substrate 2. The tip portion 215c extends from the central portion 215b in a direction away from the substrate 2 and bends toward the first lead wire 41 and the second lead wire 42 in the width direction (here, in the negative direction of the Y axis). The lead wire holding portion 211a and the second relay crimping piece 215 fasten and fix the first lead wire 41 and the second lead wire 42. The central portion 215b and the tip portion 215c bend in different directions, twisting the base of the second intermediate crimping piece 215. This reduces the bending radius of the second intermediate crimping piece 215, making it difficult for the second intermediate crimping piece 215 to separate from the lead wire holding portion 211a. As a result, the second intermediate crimping piece 215 can firmly fix the first lead wire 41 and the second lead wire 42 to the lead wire holding portion 211a.

[0057] The first relay board connecting portion 212 includes a wall portion 212a and board-side terminals 212b and 212c. The first relay board connecting portion 212 may include one or more board-side terminals. The board-side terminals 212b and 212c are electrically connected to the board 2. The board-side terminals 212b and 212c are aligned in the width direction (here, the Y-axis direction). The maximum width direction length W212 of the first relay board connecting portion 212 is shorter than the maximum width direction length W245 of the lead wire relay portion 211. The first relay board connecting portion 212 may be soldered to the board 2 shown in FIG. 3. Specifically, the board-side terminals 212b and 212c protrude downward (here, in the negative Z-axis direction) from the wall portion 212a. The board-side terminals 212b and 212c pass through holes in the board 2 and are soldered to the board 2.

[0058] Similarly, the second relay board connection portion 213 includes a wall portion 213a and board-side terminals 213b and 213c. The second relay board connection portion 213 may include one or more board-side terminals. The board-side terminals 213b and 213c are electrically connected to the board 2. The board-side terminals 213b and 213c are aligned in the width direction (here, the Y-axis direction). The maximum width direction length W213 of the second relay board connection portion 213 is shorter than the maximum width direction length W245 of the lead wire relay portion 211. The second relay board connection portion 213 may be soldered to the board 2. Specifically, the board-side terminals 213b and 213c protrude downward (here, in the negative Z-axis direction) from the wall portion 213a. The board-side terminals 213b and 213c pass through holes in the board 2 and are soldered to the board 2.

[0059] As shown in FIG. 14, on the substrate 2, relay terminals 21a, 21b, 21c, and 21d, which are examples of the relay terminal 21, are arranged in parallel in the width direction (here, the Y-axis direction).

[0060] As shown in FIG. 15, a solder layer 82 is formed on the board-side terminals 212b and 212c of the relay terminals 21a, 21b, 21c, and 21d on the lower surface 2a of the substrate 2. A solder layer 83 is also formed on the board-side terminals 213b and 213c of the relay terminals 21a, 21b, 21c, and 21d, respectively. A space SP2 can be secured between the board-side terminal 212b and the board-side terminal 213b. The substrate 2 may have a wiring pattern on the lower surface 2a that crosses the space between the first relay board connecting portion 212 and the second relay board connecting portion 213. The wiring pattern may be, for example, a copper foil pattern. This increases the degree of freedom in the wiring pattern of the substrate 2. In a specific example of the substrate 2 shown in FIG. 16, the wiring pattern P1a may cross the space SP2 between the board-side terminal 212b and the board-side terminal 213b. The wiring pattern P1a is preferably a neutral line.

[0061] (One variation of relay terminal) Next, a modified example of the relay terminal will be described with reference to Fig. 17 to Fig. 19. Fig. 17 is a perspective view showing a modified example of the relay terminal according to embodiment 1. Fig. 18 is a top view showing the modified example of the relay terminal shown in Fig. 17 and its periphery. Fig. 19 is a diagram showing the developed shape of the modified example of the relay terminal shown in Fig. 17.

[0062] A relay terminal 121 shown in Fig. 17 is a modified example of the relay terminal 21 shown in Fig. 13. The relay terminal 121 has the same configuration as the relay terminal 21 except for a first base portion 314a and a second base portion 315a. The first base portion 314a extends from one end portion 211d in the width direction of the lead wire relay portion 211 and rises toward the first lead wire 41 and the second lead wire 42 (here, in the positive direction of the Z axis). The second base portion 315a extends from the other end portion 211e in the width direction of the lead wire relay portion 211 and rises toward the first lead wire 41 and the second lead wire 42 (here, in the positive direction of the Z axis).

[0063] As shown in FIG. 18, the first base portion 314a and the second base portion 315a face each other with the space between the first lead wire 41 and the second lead wire 42 interposed therebetween.

[0064] The first base portion 314a has a length L314 in the axial direction of the first lead wire 41. The second base portion 315a has a length L315 in the axial direction of the first lead wire 41. The lengths L314 and L315 are longer than the distance L44 between the first lead wire 41 and the second lead wire 42.

[0065] Here, molten solder is supplied between the first lead wire 41 and the second lead wire 42. The first base portion 314a and the second base portion 315a then block the molten solder, preventing it from spreading in the width direction of the lead wire relay portion 211. The molten solder solidifies and forms a solder layer. The width of this formed solder layer is shorter than the length W245 in the width direction of the lead wire relay portion 211 shown in FIG. 17 . This allows the distance between adjacent relay terminals 121 to be shortened while ensuring the insulation distance between them. Therefore, the noise filter 100 can be miniaturized while ensuring insulation. Furthermore, to increase the current flowing through the first lead wire 41 and the second lead wire 42, the first lead wire 41 and the second lead wire 42 may have a large cross-sectional area, or the number of wires included in the first lead wire 41 and the second lead wire 42 may be increased. In either case, the amount of molten solder supplied increases. As described above, the first base portion 314a and the second base portion 315a block the molten solder and prevent it from spreading in the width direction of the lead wire relay portion 211. This prevents the molten solder from moving outward in the width direction of the lead wire relay portion 211 and thereby preventing it from not contributing to the electrical connection between the first lead wire 41 and the second lead wire 42. In other words, the molten solder can be reliably supplied between the first lead wire 41 and the second lead wire 42. Therefore, an appropriate amount of molten solder can be supplied to electrically connect the first lead wire 41 and the second lead wire 42.

[0066] (Developed shape) The unfolded shape E121 shown in FIG. 19 is a shape obtained by unfolding the relay terminal 121 shown in FIG. 17 on a predetermined plane (here, the XY plane). The unfolded shape E121 is encompassed by a substantially rectangular shape. In the unfolded shape E121, the lead wire relay portion 211, the first relay board connection portion 212, and the second relay board connection portion 213 extend along the longitudinal direction of the substantially rectangular shape (here, the X-axis direction). The unfolded shape E121 is encompassed by the main surface of the workpiece WK1, similar to the unfolded shape E1 shown in FIG. 12. The lead wire relay portion 211, the first relay board connection portion 212, and the second relay board connection portion 213 extend along the lateral direction of the workpiece WK1 (here, the X-axis direction). Furthermore, it is preferable that a plurality of unfolded shapes E121 are arranged side by side on the main surface of the workpiece WK1 in the longitudinal direction of the workpiece WK1 (here, the Y-axis direction). That is, it is possible to obtain many relay terminals 121 from one workpiece, which means that waste in the workpiece can be reduced and the yield can be increased.

[0067] (circuit) As described above, the coils 31 and 32, the electronic component 5, and the resistor 5a are electrically connected via the terminal fitting 1, the printed wiring pattern of the substrate 2, and the relay terminal 21, thereby forming an electric circuit. An example of this formed electric circuit is shown in FIG. 20. FIG. 20 is a circuit diagram of the noise filter 100 shown in FIG. 1. FIG. 21 is a top view showing components in the circuit of one configuration example of the noise filter shown in FIG. 20. Resistors Rx1, Rx2, Rx3, Rx4, Rx5, Rx6, Ry1, and Ry2 shown in FIGS. 20 and 21 are an example of the resistor 5a shown in FIG. 4. Capacitors Cx1, Cx2, Cx3, Cx4, Cx5, Cx6, Cy1, and Cy2 shown in FIGS. 20 and 21 are an example of the electronic component 5 shown in FIG. 4.

[0068] The present invention is not limited to the above-described embodiments and can be modified as appropriate without departing from the spirit and scope of the present invention. Furthermore, the present invention can be embodied by appropriately combining the above-described embodiments and examples thereof. For example, the exemplary configuration of the noise filter 100 shown in FIG. 1 includes terminal fittings 1a-1h, first lead wires 41a-41d, and second lead wires 42a-42d, but the noise filter 100 may include at least one terminal fitting, one first lead wire, and one second lead wire. [Explanation of symbols]

[0069] 100 Noise Filter 1, 1a~1h Terminal fittings 11 External terminal 11a male thread 11b Washer 11c hole 11d end 12 Coil connection 12a Lead wire holder 12b One end 12c Other end 12d end 13 Board connection part 13a Wall section 13b Board side terminal 14, 15 Crimping piece 14a, 15a body 14b, 15b Tip 21, 21a to 21d, 121 relay terminal 211 Lead wire relay section 211a Lead wire holder 211b, 211d One end 211c, 211e other end 212 first relay board connection portion 213 Second relay board connection part 212a, 213a wall 212b, 212c, 213b, 213c Board side terminal 214 First relay crimping piece 215 Second relay crimping piece 214a, 314a First base 215a, 315a Second base 214b, 215b central part 214c, 215c tip 2 boards 2a Lower surface 31, 32 Coils 31a, 32a ring core 41, 41a to 41d First lead wire 42, 42a to 42d Second lead wire 5. Electronic Components 5a resistor 6 Terminal block 6a Terminal holding part 6b flange 6c groove 6d bolt 61 Transparent cover 7 Metal Case 71 Bottom plate 71a End 72 Lid 8a, 8b, 82 solder layer A14 area Cx1~Cx6, Cy1~Cy2 capacitors E1, E121 unfolded shape L44 distance P1, P1a, P1b wiring patterns Rx1~Rx6, Ry1~Ry2 resistors SP1, SP2 Space W11 distance W45 width W88 distance WK1 Work WW width

Claims

1. Terminal fittings, A substrate; a coil mounted on the substrate; the terminal fitting includes an external terminal electrically connectable to an external device, a coil connection portion electrically connected to the coil via a first lead wire, and a board connection portion electrically connected to the board, When a direction perpendicular to the axial direction of the first lead wire and parallel to the substrate is defined as a width direction, the coil connection portion extends from an axial end of the first lead wire of the external terminal toward the coil, the substrate connection portion is bent from an axial end of the first lead wire of the coil connection portion toward the substrate, the terminal fitting includes a crimping piece provided at an end of the coil connection portion in the width direction, The crimping piece crimps one end of the first lead wire. Noise filter.

2. the board connection portion includes a plurality of board-side terminals electrically connected to the board, The plurality of board-side terminals are aligned in the width direction, a length of the substrate connection portion in the width direction is shorter than a length of the coil connection portion in the width direction; The noise filter according to claim 1 .

3. The crimping piece has a main body and a tip portion, the main body extends from an end of the coil connection portion in the width direction in the axial direction of the first lead wire of the coil connection portion and bends in a direction away from the substrate, the tip portion extends from the main body in a direction away from the substrate and bends toward the first lead wire in the width direction; 3. The noise filter according to claim 1 or 2.

4. The terminal fitting has an expanded shape that is encompassed by a substantially rectangular shape, the external terminal, the coil connection portion, and the board connection portion extend along the longitudinal direction of the substantially rectangular shape in the developed shape of the terminal fitting; 3. The noise filter according to claim 1 or 2.

5. The noise filter further includes a relay terminal, the relay terminal includes a lead wire relay portion that relays an electrical connection between the first lead wire and the second lead wire, and first and second relay board connection portions that are electrically connected to the board, respectively; the first relay board connection portion extends from one end of the lead wire relay portion in the axial direction of the first lead wire and bends toward the board, the second relay board connection portion extends from the other end of the lead wire relay portion in the axial direction of the first lead wire and bends toward the board, the substrate has a wiring pattern that crosses the space between the first relay board connection portion and the second relay board connection portion; 3. The noise filter according to claim 1 or 2.

6. the wiring pattern includes a neutral line that crosses a space between the first relay board connection portion and the second relay board connection portion; 6. The noise filter according to claim 5.

7. the relay terminal includes a first relay crimping piece that crimps the other ends of the first and second lead wires, the first intermediate crimping piece includes a first base portion, a central portion, and a tip portion; the first base portion is provided at one end portion in the width direction of the lead wire relay portion, the central portion extends from the first base portion in the axial direction of the first lead wire and bends in a direction away from the substrate, the tip portion extends from the central portion in a direction away from the substrate and bends toward the first and second lead wires in the width direction; The noise filter according to claim 5 .

8. the relay terminal further includes a second relay crimping piece that crimps the other ends of the first and second lead wires, the second relay crimping piece includes a second base portion provided at the other end of the lead wire relay portion in the width direction, the first base portion extends from one end of the lead wire relay portion in the width direction and rises toward the first and second lead wires, the second base portion extends from the other end of the lead wire relay portion in the width direction and rises toward the first and second lead wires, the first and second base portions face each other across a space between the first lead wire and the second lead wire; the first and second base portions are longer than a distance between the first lead wire and the second lead wire in an axial direction of the first lead wire; The noise filter according to claim 7.

9. four of the first lead wires; The coil includes one ring core, When viewed from a main surface of the substrate facing the ring core, the four first lead wires are wound around the one ring core so that they each extend in a cross shape from the center of the one ring core.

3. The noise filter according to claim 1 or 2.

Images