Noise removal device

Abstract

To prevent erroneous assembly while forming a pair of upper and lower insulating members in the same shape with excellent productivity and ease of handling.SOLUTION: In a noise removal device M, odd-shaped locking portion 48 and unlocked portion 49 are provided at a position of flange plates 44 and 45 of a pair of upper and lower insulation members 40 that are symmetrical in a longitudinal direction and asymmetrical in a lateral direction and have the same shape at equal distances in the lateral direction from a center of an insulation member in the lateral direction. The locking portion 48 and the locked portion 49 are engaged with each other when the pair of upper and lower insulation members are properly combined in a front-rear direction, and are disengaged from each other by interfering with each other when the pair of upper and lower insulation members are improperly combined in the front-rear direction.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a noise removal device. [Background technology]

[0002] A known type of two-piece magnetic core is the "UU core." A noise elimination device using this type of magnetic core is configured by combining a pair of magnetic cores with the same U-shaped cross section and a recess on one side, with the recesses facing each other, and inserting a conductive member (electric wire or bus bar) through which noise is transmitted into the space secured by the two recesses.

[0003] Noise removal devices using this two-split magnetic core are widely used due to the advantage that the magnetic core can be disposed so as to surround the conductive member after installation (see, for example, Patent Documents 1 and 2).

[0004] According to this noise removal device, high frequency noise superimposed on the current flowing through the conductive member can be removed by the magnetic core disposed in an annular shape so as to surround the conductive member.

[0005] In addition to the magnetic core, a component (coil bobbin) to be assembled into a noise removal device may also be made to have a two-piece structure to improve ease of assembly (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2000-353622 A [Patent Document 2] JP 2017-123415 A [Patent Document 3] JP 2007-207788 A

[0007] 7 to 10 show a noise removal device which is the premise of the present invention. By explaining this underlying technology, the problem that the present invention is intended to solve will be made clear.

[0008] FIG. 7 is an exploded perspective view of the noise removal device that is the premise of the present invention. 7, two bus bars designated by reference numeral 50 are conductive members from which noise is to be removed in this device. In order to remove high-frequency noise superimposed on the current flowing through these bus bars 50, 50, this noise removal device M100 is attached to the bus bars 50, 50 after installation. Here, the two bus bars 50, 50 are arranged parallel to each other with a gap between them in the left-right direction and extend in the front-rear direction.

[0009] This noise elimination device M100 is composed of a housing 10 integrally molded from resin, and parts assembled inside the housing 10. The parts assembled inside the housing 10 include a spring 20, a pair of upper and lower ferrite cores 30A, 30B (30), and a pair of upper and lower insulating members (bobbins) 140A, 140B (140). The ferrite core 30 and the insulating member 140 are each divided into upper and lower halves so that they can be attached later to a bus bar 50 that has been previously arranged.

[0010] The configuration of each part will be described individually. First, the housing 10 is arranged so that the two bus bars 50, 50 are inserted therethrough. The housing 10 has a bottom wall 11 located below the two bus bars 50, 50, and front and rear side walls 12, 12 and left and right side walls 13, 13 that stand upward from the bottom wall 11 and define an accommodation space 18 that is quadrangular (rectangular) in plan view.

[0011] Here, for convenience, the defined directionality will be described first. The directionality defined here is set based on the housing 10, and the downward direction in the vertical direction refers to the direction in which the bottom wall 11 of the housing 10 is located, and the upward direction refers to the direction in which the side walls 12, 13 protrude from the bottom wall 11. Note that the vertical direction does not necessarily refer to the top-to-bottom direction, but in FIG. 7 it is illustrated to coincide with the top-to-bottom direction. Also, the left-to-right direction refers to the direction perpendicular to the up-to-down direction and the direction in which one pair of side walls 13, 13 of the housing 10 is located, and the front-to-rear direction refers to the direction perpendicular to the up-to-down direction and the left-to-right direction and the direction in which the other pair of side walls 12, 12 is located. Note that the axis in the left-to-right direction is called the X-axis, the axis in the front-to-rear direction is called the Y-axis, and the axis in the up-to-down direction is called the Z-axis.

[0012] Of the four side walls 12, 13 of the housing 10, a pair of side walls 12, 12 in the front-rear direction has notches 14 through which two bus bars 50, 50 extending along the front-rear direction are inserted. The notches 14 are formed from the upper edges of the front and rear side walls 12, 12 toward the bottom wall 11. In addition, of the four side walls 12, 13, a pair of side walls 13, 13 in the left-right direction is provided with engagement portions 15, 15 that can be bent outwardly, which will be described later.

[0013] The ferrite cores (magnetic cores) 30 (30A, 30B) are formed in the same shape so that they can be combined in a pair. Each ferrite core 30A, 30B is formed in a rectangular shape in a plan view. Each ferrite core 30A, 30B has a pair of left and right column parts 31, 31 that face each other with a gap in the left and right direction, and a connecting part 32 that connects one end of the pair of column parts 31, 31 to each other. Each ferrite core 30A, 30B has a recess 33 formed by the pair of column parts 31, 31 and the connecting part 32, and has a U-shaped cross section. The ferrite core 30A arranged on the lower side is assembled with the connecting part 32 facing down, and the ferrite core 30B on the upper side is inverted upside down and assembled with the connecting part 32 facing up. Then, the recesses 33 are combined to face each other to form an annular core surrounding the bus bars 50, 50.

[0014] The pair of engaging portions 15 of the housing 10 are provided symmetrically in the widthwise center near the upper ends of the opposing left and right side walls 13. When the two ferrite cores 30B, 30A are inserted from above into the accommodation space 18, these engaging portions 15, 15 are pushed by the inserted ferrite cores 30B, 30A and elastically deform outward to allow the insertion, and elastically return to their original positions after the insertion. After all components are inserted, the engaging claws 15a, 15a of the engaging portions 15, 15 that have elastically returned to their original positions engage with the upper edge of the connecting portion 32 of the upper ferrite core 30B, which was inserted last, thereby positioning and holding the upper and lower ferrite cores 30 (30A, 30B) in the vertical direction.

[0015] Moreover, the insulating member 140 is mainly housed in a space surrounded by the connecting portions 32 and the column portions 31 of the pair of upper and lower ferrite cores 30 (30A, 30B) housed in the housing 10. The pair of insulating members 140A, 140B are combined with one inverted upside down relative to the other and housed in the housing 10, thereby providing insulation between the two bus bars 50, 50.

[0016] The upper and lower insulating members 140 are resin-molded to have the same shape, but are formed to be symmetrical in the front-rear direction and asymmetrical in the left-right direction. Each insulating member 140 has a pair of front and rear flange plates 44, 45 arranged along the outer surfaces of the pair of front and rear side walls 12, 12 of the housing 10. The pair of flange plates 44, 45 are integrally connected by a connecting member inserted into the cutouts 14 of the front and rear side walls 12, 12 of the housing 10, i.e., the left and right side plates 41, 42 having different heights and a connecting plate 43 connecting the left and right side plates 41, 42. The distance between the left and right side plates 41, 42 is set to a dimension that allows them to fit into the cutouts 14 of the front and rear side walls 12, 12 of the housing 10 without rattling.

[0017] In addition, a partition plate 46 is provided between the left and right side plates 41, 42 to be inserted between the two bus bars 50, 50 when the upper and lower insulating members 140 (140A, 140B) are assembled. This partition plate 46 is supported by the connecting plate 43 and disposed at a position offset from the center in the left-right direction of the insulating member 140. The reason for displacing the partition plate 46 is to prevent the partition plates 46 from interfering with each other when the insulating members 140A, 140B are assembled facing each other vertically. The partition plates 46 of the upper and lower insulating members 140B, 140A are inserted between the two bus bars 50, 50, and support the inner surface of one bus bar 50 with their tips overlapping in the insertion direction, and insulate the two bus bars 50, 50 from each other. By overlapping the tips of the upper and lower partition plates 46, 46, it is expected that the gap between the partition plates 46, 46 is eliminated, and the insulation property is improved.

[0018] Furthermore, a locking piece 47 is protruded from the left-right central portion of each of the flange plates 44, 45 and engages with the locked portion 17 on the housing 10 side when the lower insulating member 140 is inserted into a predetermined position within the housing 10.

[0019] Next, the assembly procedure will be described. When assembling this noise removal device M100, first, the spring 20 is inserted into the inner bottom portion (upper surface of the bottom wall 11) of the accommodation space 18 of the housing 10. Next, the lower ferrite core 30A is inserted with the connecting portion 32 facing downward. When inserting, the ferrite core 30A is inserted while pushing the engaging portion 15 of the housing 10 and bending it outward, and when the insertion is completed, the engaging portion 15 elastically returns to its original position.

[0020] Next, the lower insulating member 140A is inserted on top of that. The lower insulating member 140A is inserted with the leading edge of the partition plate 46 facing upward. Then, the connecting member (left and right side plates 41, 42 and connecting plate 43) slides along the notches 14 in the front and rear side walls 12, 12 of the housing 10. At the same time, the pair of front and rear flange plates 44, 45 slide along the outer surfaces of the front and rear side walls 12, 12 of the housing 10.

[0021] In this state, the housing 10, together with the lower ferrite core 30A and the lower insulating member 140A, is attached to the bus bar 50. Of course, the bus bar 50 may also be attached to the housing 10. In this case, the partition plate 46 of the lower insulating member 140A is inserted between the two bus bars 50, 50 and is disposed along the inner surface of one of the bus bars 50.

[0022] Next, the upper insulating member 140B is inserted onto the two bus bars 50, 50. The upper insulating member 140B is inserted with the leading edge of the partition plate 46 facing downward. Then, the connecting members, i.e., the left and right side plates 41, 42 and the connecting plate 43, slide along the notches 14 in the front and rear side walls 12, 12 of the housing 10, and the front and rear flange plates 44, 45 slide along the outer surfaces of the front and rear side walls 12, 12 of the housing 10.

[0023] By inserting in this manner, the partition plate 46 of the upper insulating member 140B is inserted between the two bus bars 50, 50, so that the tips of the upper and lower partition plates 46, 46 overlap each other in the vertical direction (insertion direction), and the upper partition plate 46 is positioned along the inner surface of the other bus bar 50.

[0024] Next, the upper ferrite core 30B is inserted onto the upper insulating member 140B with the connecting portion 32 facing up. When the upper ferrite core 30B is inserted, the engaging portions 15, 15 of the housing 10 are bent outward. When the insertion is completed, the engaging portions 15, 15 elastically return to their original positions, and the engaging claws 15a, 15a of the engaging portions 15, 15 engage with the upper edge of the connecting portion 32 of the upper ferrite core 30B. As a result, all the components, i.e., the spring 20, the upper and lower ferrite cores 30, and the upper and lower insulating members 140, are positioned and held within the housing 10. In addition, the two bus bars 50, 50 are surrounded by the upper and lower ferrite cores 30B, 30A in a state where they are stably insulated by the insulating members 140A, 140B. Summary of the Invention [Problem to be solved by the invention]

[0025] Incidentally, in the insulating member 140 of the noise removal device M100 described above, there is a risk of erroneous assembly when the upper insulating member 140B is later installed upside down to the lower insulating member 140A that has been previously installed in the housing 10. Specifically, the insulating member 140B to be installed later may be rotated around the Z axis (axis along the vertical direction) and then installed. The cause of this erroneous assembly is assumed to be that it is difficult to distinguish the difference between the front and rear orientations because the insulating member 140 has a symmetrical shape in the front-rear direction. Thus, when installing the upper insulating member 140B, there are a pattern in which it is installed in a proper orientation (normal orientation) in this rotation direction (left-right rotation direction) and a pattern in which it is installed in an improper orientation (incorrect orientation) rotated 180 degrees.

[0026] If the insulating member 140 is symmetrical in the front-rear direction and also in the left-right direction, no problem will occur because the shape will be the same even if the front-rear orientation is reversed (even if rotated 180° around the Z axis). However, if the left-right shape of the insulating member 140 is symmetrical at first glance, but is asymmetric in a part that is difficult to notice, reversing the front-rear orientation will result in an incorrect orientation, leading to incorrect assembly.

[0027] In other words, when inserting the upper insulating member 140B upside down, if there is a difference in the left-right shape of the insulating member 140 that cannot be distinguished at first glance, and the front and back orientations are reversed, the worker will not easily notice that the orientations are different, which may result in incorrect assembly.

[0028] FIG. 8 is a perspective view and a side view of the upper insulating member 140B when assembled in the correct orientation, and FIG. 9 is a perspective view and a side view of the noise removal device M100 after the upper ferrite core 30B is assembled and completed.

[0029] As shown in FIG. 8, in the case of normal assembly, the assembly can be continued as is, and then the upper ferrite core 30B can be attached to obtain the completed noise removal device M100 as shown in FIG.

[0030] Figure 10 is a perspective view and a side view of the upper insulating member 140B when it is erroneously assembled in the reversed front-to-back direction. In Figure 10, the positions of the front and rear flange plates 44, 45 are swapped from that in Figure 8. That is, the flange plate 45, which is on the rear side in Figure 8, is mistakenly on the front side in Figure 10. When it is erroneously assembled as shown in Figure 10, the partition plates 46, 46 of the upper and lower insulating members 140B, 140A may interfere with each other, causing problems.

[0031] By the way, even if an incorrect assembly is about to occur, if the mistake is detected immediately, it will not lead to a serious problem, but if it is not detected immediately, the assembly may continue as it is, which may lead to a problem. Also, if it is possible to easily know when the assembly is completed properly (assembly in the correct orientation), it will be possible to eliminate incorrect assembly.

[0032] However, in the case of the noise removal device M100 of the above-mentioned prerequisite technique, when the upper insulating member 140B is combined with the lower insulating member 140A, it is difficult to detect whether the assembly has been properly performed.

[0033] Furthermore, in the case of incorrect assembly, the positions of the upper and lower partition plates 46, 46 will coincide in the left-right direction, causing them to interfere with each other. Therefore, the interference between the upper and lower partition plates 46, 46 makes it possible to detect an incorrect assembly pattern with difficulty, but if the amount of interference is small, depending on the dimensional error, the partition plates 46, 46 may be deformed as they are assembled, making it impossible to detect the incorrect assembly. If the partition plates 46 are assembled in such an incorrect orientation, there is a concern that the deformation of the partition plate 46 may cause damage to the parts.

[0034] One possible solution to these problems would be to make the two insulating members different in shape to eliminate the possibility of incorrect assembly patterns, but this would result in the upper and lower insulating members having different shapes, which would lead to increased costs due to the increased number of insulating member types.

[0035] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a noise removal device in which the upper and lower pair of insulating members have the same shape for good productivity and ease of handling, while preventing incorrect assembly. [Means for solving the problem]

[0036] In order to achieve the above object, a noise removal device according to the present invention has the following features. a housing into which two bus bars extending in a front-rear direction and parallel to each other with a left-right gap therebetween are arranged to be inserted, the housing having a bottom wall located below the two bus bars, a pair of left-right side walls and a pair of front-rear side walls erected upward from the bottom wall to define an accommodation space having a rectangular shape in a plan view, and U-shaped cutout portions formed in the pair of front-rear side walls from upper edges toward the bottom wall for inserting the bus bars; a pair of upper and lower magnetic cores having a U-shaped cross section that constitute an annular core surrounding the two bus bars when assembled into the housing; a pair of upper and lower insulating members having the same shape, which are symmetrical in the front-rear direction and asymmetrical in the left-right direction, and which insulate the two bus bars from each other by being combined with one another in a vertically inverted position and housed in a space sandwiched between the pair of upper and lower magnetic cores housed in the housing, The insulating member is a pair of front and rear flange plates disposed along outer surfaces of a pair of front and rear side walls of the housing; a connecting member that connects the pair of front and rear flange plates through cutout portions in the pair of front and rear side walls of the housing; a partition plate supported by the flange plate or the connecting member, disposed at a position offset from the center of the insulating member in the left-right direction, and inserted between the two bus bars from below and above, thereby insulating the two bus bars with their tips overlapping each other in the insertion direction; having The flange plate is provided with an irregularly shaped locking portion and a locked portion at positions equidistant from the center of the insulating members in the left-right direction, the locking portion and the locked portion engaging with each other when the upper and lower insulating members are properly combined in the front-to-back directions, and disengaging from each other due to interference with each other when the upper and lower insulating members are improperly combined in the front-to-back directions. Noise removal device. Effect of the Invention

[0037] According to the present invention, the upper and lower pair of insulating members can be made to have the same shape for good productivity and ease of handling, while preventing incorrect assembly.

[0038] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the following description of the embodiment of the present invention (hereinafter, referred to as "embodiment") with reference to the accompanying drawings. [Brief description of the drawings]

[0039] [Figure 1] FIG. 1 is an exploded perspective view of a noise removal device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the configuration of a pair of upper and lower insulating members in the device. [Diagram 3] FIG. 3 is a side view showing the configuration of a pair of upper and lower insulating members in the device. [Figure 4] FIG. 4 is a perspective view and a side view of the upper insulating member when properly assembled. [Diagram 5] FIG. 5 is a perspective view and a side view of the noise removal device according to the embodiment after proper assembly is completed. [Figure 6] FIG. 6 is a perspective view and a side view showing a case where the upper insulating member is incorrectly assembled. [Figure 7] FIG. 7 is an exploded perspective view of a noise removal device exemplified as a prerequisite technique for the present invention. [Figure 8] FIG. 8 is a perspective view and a side view of the noise removal device of the prerequisite technique when the upper insulating member is attached in the correct orientation. [Figure 9] FIG. 9 is a perspective view and a side view showing the completed state of the noise removal device of the prerequisite technology. [Figure 10] FIG. 10 is a perspective view and a side view of the noise removal device of the prerequisite technique when the upper insulating member is improperly assembled. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] Specific embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a noise removal device according to an embodiment of the present invention. The noise removal device M of this embodiment differs from the noise removal device M100 of the prerequisite technology shown in Fig. 7 in the following respects: The component with a different configuration is the insulating member 40 which has the same shape but is used upside down.

[0041] Fig. 2 is a perspective view showing the configuration of the pair of upper and lower insulating members, and Fig. 3 is a side view showing the configuration of the same insulating members. As shown in Figs. 2 and 3, the difference in configuration is that a locking portion 48 and a locked portion 49 that are a pair of different shapes and form a female-male type are provided on front and rear flange plates 44, 45 of insulating member 40 (40A, 40B). Similar to the one shown in Fig. 7, insulating member 40 is formed symmetrically in the front-rear direction and asymmetrically in the left-right direction.

[0042] The locking portion 48 is a locking frame protruding toward the mating insulating member 40, and the locked portion 49 is a locking protrusion that fits into the mating locking frame 48. The locking portion 48 and the locked portion 49 are arranged at equidistant positions in the left-right direction from the center of the insulating member 140 in the left-right direction. Therefore, when the upper and lower insulating members 40A and 40B are combined in the proper front-to-back direction, they engage with each other. On the other hand, when the upper and lower insulating members 40A and 40B are combined in the improper front-to-back direction, they interfere with each other and become disengaged. Here, the lap dimension of the partition plate 46 and the protruding dimension of the locking portion 48 are set so that the upper and lower partition plates 46, 46 do not interfere with each other, i.e., do not butt against each other, when the upper and lower protruding locking portions 48 interfere with each other and become disengaged. The lap dimension of the partition plate 46 is the protruding dimension toward the mating insulating member 40.

[0043] The other configuration is the same as that of the noise removal device M100 described above with reference to FIG. 7 as the underlying technique, so the same components in the drawings are given the same reference numerals and the description thereof is omitted.

[0044] Fig. 4 is a perspective view and a side view of the upper insulating member 40B when properly assembled, and Fig. 5 is a perspective view and a side view of the noise removal device M after proper assembly. Fig. 6 is a perspective view and a side view of the upper insulating member 40B when improperly assembled. In Fig. 6, the flange plate 45, which is on the rear side in Fig. 4, has come to the front, which is an improper assembly pattern.

[0045] When assembling the noise removal device M of this embodiment, first, the spring 20 is inserted into the inner bottom portion (upper surface of the bottom wall 11) of the accommodation space 18 of the housing 10. Next, the lower ferrite core 30A is inserted with the connecting portion 32 facing downward.

[0046] Next, the lower insulating member 40A is inserted on top of that. The lower insulating member 40A is inserted with the tip of the partition plate 46 facing upward. Then, the connecting member (left and right side plates 41, 42 and connecting plate 43) slides along the notches 14 in the front and rear side walls 12, 12 of the housing 10. At the same time, the pair of front and rear flange plates 44, 45 slide along the outer surfaces of the front and rear side walls 12, 12 of the housing 10.

[0047] In this state, the housing 10, together with the lower ferrite core 30A and the lower insulating member 40A, is attached to the bus bar 50 (note that the bus bar 50 may be attached to the housing 10). Then, the partition plate 46 of the lower insulating member 40A is inserted between the two bus bars 50, 50, and is disposed along the inner surface of one of the bus bars 50.

[0048] Next, the upper insulating member 40B is inserted on top of that. The upper insulating member 40B is inserted with the tip of the partition plate 46 facing downward. Then, the connecting member (left and right side plates 41, 42 and connecting plate 43) slides along the notches 14 of the front and rear side walls 12, 12 of the housing 10, and the front and rear flange plates 44, 45 slide along the outer surfaces of the front and rear side walls 12, 12 of the housing 110.

[0049] By inserting them in this manner, as shown in Figure 4, the partition plate 46 of the upper insulating member 40B is inserted between the two bus bars 50, 50, the tips of the upper and lower partition plates 46, 46 overlap each other in the vertical direction, and the upper partition plate 46 is positioned along the inner surface of the other bus bar 50.

[0050] When inserting this upper insulating member 40B, if the upper insulating member 40B is assembled to the lower insulating member 40A in the correct orientation, that is, when assembled properly, the upper and lower locking portions 48 and locked portions 49 engage with each other, completing proper assembly. During proper assembly, the locking portions 48 and locked portions 49 engage properly, providing a locking feel and sound, which allows the user to detect that proper assembly has been completed.

[0051] Next, as shown in Fig. 5, the upper ferrite core 30B is inserted into the housing 10 with the connecting portion 32 facing up. During insertion, the upper ferrite core 30B is inserted while bending the engaging portions 15, 15 of the housing 10 outward. When the insertion is complete, the engaging portions 15, 15 elastically return to their original positions, causing the engaging claws 15a, 15a of the engaging portions 15, 15 to engage with the upper edge of the connecting portion 32 of the upper ferrite core 30B.

[0052] As a result, all components (spring 20, upper and lower ferrite cores 130, upper and lower insulating members 40) are positioned and held within housing 10. Furthermore, two bus bars 50, 50 are surrounded by upper and lower ferrite cores 30B, 30A in a state where they are stably insulated by insulating members 40A, 40B. Then, assembly of noise removal device M of this embodiment is completed.

[0053] On the other hand, when the upper insulating member 40B is inserted as described above, as shown in FIG. 6, if the upper insulating member 40B is assembled with the orientation reversed, it will be an erroneous assembly. When such an erroneous assembly is performed, that is, when the members are assembled improperly, as shown in FIG. 6, the upper and lower protruding locking portions 48 interfere with each other (butt against each other), and the locking portions 48 and the locked portions 49 are disengaged, and the upper insulating member 40B cannot be inserted any further. In other words, when the upper insulating member 40B is erroneously assembled, it is not possible to insert the upper insulating member 40B to the correct position, which makes it possible to detect the erroneous assembly. In other words, it is not possible to insert the upper insulating member 40B at a position higher than the correct position, which makes it possible to detect the erroneous assembly. Therefore, it is possible to prevent the erroneous assembly. Also, as shown in the side view of FIG. 6, the insertion height of the upper insulating member 40B when the erroneous assembly is detected is higher than the interference position between the partition plates 46, 46, which prevents the parts from being broken due to the deformation of the partition plates 46, 46.

[0054] Furthermore, since the above effects can be achieved by using insulating members 40 having the same shape on the top and bottom, there is no increase in costs due to an increase in the number of different parts.

[0055] Here, the features of the noise removal device according to the embodiment of the present invention described above will be briefly summarized and listed in [1] and [2] below. [1] A housing (10) into which two bus bars (50) extending parallel to each other in a front-rear direction and spaced apart in the left-right direction are arranged to be inserted, the housing having a bottom wall (11) located below the two bus bars, a pair of left and right side walls (13) and a pair of front and rear side walls (12) erected upward from the bottom wall to define an accommodation space (18) having a rectangular shape in a plan view, and U-shaped cutout portions (14) for inserting the bus bars formed in the pair of front and rear side walls from upper edges toward the bottom wall; a pair of upper and lower magnetic cores (ferrite cores 30, 30A, 30B) having a U-shaped cross section that constitutes an annular core surrounding the two bus bars by being assembled into the housing; a pair of upper and lower insulating members (40, 40A, 40B) having the same shape and being symmetrical in the front-rear direction and asymmetrical in the left-right direction, the insulating members being combined with the other in a position upside down and housed in a space sandwiched between the pair of upper and lower magnetic cores housed in the housing, thereby providing insulation between the two bus bars, The insulating member is a pair of front and rear flange plates (44, 45) disposed along outer surfaces of a pair of front and rear side walls of the housing; a connecting member (left and right side plates 41, 42, a connecting plate 43) that connects the pair of front and rear flange plates through cutouts in the pair of front and rear side walls of the housing; a partition plate (46) supported by the flange plate or the connecting member, disposed at a position offset from the center of the insulating member in the left-right direction, and inserted between the two bus bars from below and above, thereby insulating the two bus bars with their tips overlapping each other in the insertion direction; having The flange plate is provided with an irregularly shaped locking portion (48) and a locked portion (49) at positions equidistant from the center of the insulating members in the left-right direction, the locking portion (48) and the locked portion (49) engaging with each other when the upper and lower insulating members are properly combined in the front-to-rear direction, and disengaging from each other due to interference when the upper and lower insulating members are improperly combined in the front-to-rear direction. Noise remover (M).

[0056] According to the configuration [1] above, when the upper insulating member (40B) is assembled to the lower insulating member (40A) in the correct orientation, i.e., when they are properly assembled, the upper and lower locking portions (48) and locked portions (49) engage with each other, completing proper assembly. During proper assembly, the locking portions and locked portions properly engage with each other, providing a locking feel and sound, which allows the user to detect that proper assembly has been completed. On the other hand, if an incorrect assembly occurs, i.e., if the components are assembled improperly, the upper and lower locking portions (48) or locked portions (49) interfere with each other, disengaging the two and preventing further insertion of the upper insulating member (40B). In other words, in the event of an incorrect assembly, the upper insulating member (40B) cannot be inserted to the correct position, making it possible to detect the incorrect assembly. In other words, the upper insulating member (40B) cannot be inserted at a position higher than the correct position, making it possible to detect the incorrect assembly. This makes it possible to prevent incorrect assembly. Furthermore, the above effects can be achieved with insulating members (40) that are the same shape on the top and bottom, so there is no increase in costs due to an increase in the number of parts.

[0057] [2] The lap dimensions of the partition plates are set so that the upper and lower partition plates (46) do not interfere with each other when the locking portion (48) or the locked portion (49) interfere with each other and become disengaged. The noise removal device according to [1] above.

[0058] According to the above configuration [1], the insertion height of the upper insulating member (40B) when an incorrect assembly is detected is higher than the interference position between the partition plates (46), thereby preventing damage to components due to deformation of the partition plates (46). [Explanation of symbols]

[0059] M Noise Elimination Device 10. Housing 11 Bottom wall 12 Front and rear side walls 13 Left and right side walls 14 Notch 15 Engagement part 18 Containment Space 30 Ferrite core (magnetic core) 30A Lower ferrite core (magnetic core) 30B Upper ferrite core (magnetic core) 31 Column section 32 Connecting part 33 Recess 40 Insulating materials 40A Lower insulation material 40B Upper insulating member 41, 42 Left and right side plates (connecting members) 43 Connecting plate (connecting member) 44,45 Tsuba plate 46 Partition 48 Locking part 49 Locked part 50 Busbar (conductive material)

Claims

1. a housing into which two bus bars extending in a front-rear direction and parallel to each other with a gap in the left-right direction are arranged to be inserted, the housing having a bottom wall located below the two bus bars, a pair of left-right side walls and a pair of front-rear side walls erected upward from the bottom wall to define an accommodation space having a rectangular shape in a plan view, and U-shaped cutouts for inserting the bus bars formed in the pair of front-rear side walls from upper edges toward the bottom wall; a pair of upper and lower magnetic cores each having a U-shaped cross section that constitutes an annular core surrounding the two bus bars when assembled in the housing; a pair of upper and lower insulating members having the same shape, which are symmetrical in the front-rear direction and asymmetrical in the left-right direction, and which insulate the two bus bars from each other by being combined with one another in a vertically inverted position and housed in a space sandwiched between the pair of upper and lower magnetic cores housed in the housing, The insulating member is a pair of front and rear flange plates disposed along outer surfaces of a pair of front and rear side walls of the housing; a connecting member that connects the pair of front and rear flange plates through cutout portions in the pair of front and rear side walls of the housing; a partition plate supported by the flange plate or the connecting member, disposed at a position offset from the center of the insulating member in the left-right direction, and inserted between the two bus bars from below and above, thereby insulating the two bus bars with their tips overlapping each other in the insertion direction; having The flange plate is provided with an irregularly shaped locking portion and a locked portion at positions equidistant from the center of the insulating members in the left-right direction, the locking portion and the locked portion engaging with each other when the upper and lower insulating members are properly combined in the front-to-back directions, and disengaging from each other due to interference with each other when the upper and lower insulating members are improperly combined in the front-to-back directions. Noise removal device.

2. The overlap dimension of the partition plate is set so that the upper and lower partition plates do not interfere with each other when the locking portion or the locked portion interfere with each other and become disengaged. The noise removal device according to claim 1 .

Images