Housing for magnetic core and noise elimination device

Abstract

To provide a magnetic core casing capable of applying sufficient force to a magnetic core.SOLUTION: A magnetic core casing 1 includes a housing 10a capable of accommodating a core 50a, a housing 10b capable of accommodating a core 50b, a hinge 11 that connects the housing 10a and the housing 10b so that they can be opened and closed, and a metal spring 20 provided in the housing 10a. The metal spring 20 includes reinforcing means 23a, 23b that include a flat portion 21 and a pair of spring portions 22a and 22b and suppress bending of the flat portion 21 by force transmitted from the pair of spring portions 22a and 22b when the core 50a is housed in the housing 10a.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a housing for a magnetic core and a noise elimination device. [Background technology]

[0002] In recent years, noise removal devices that remove noise superimposed on a signal cable by attaching a magnetic material such as ferrite to the outer periphery of the signal cable have been widely used. Patent Document 1 discloses a technique related to such a noise removal device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-32395 Summary of the Invention [Problem to be solved by the invention]

[0004] The noise elimination device disclosed in Patent Document 1 is configured by dividing a cylindrical magnetic core into two parts on a plane along the central axis, and housing each of the two divided magnetic cores in a two-part housing made of a resin material. An urging claw is provided on the inner surface of each housing to apply a force to the magnetic core in a direction toward the central axis when the magnetic core is housed therein. With this configuration, when the noise elimination device is attached to the outer periphery of a signal cable, the two divided magnetic cores can be brought into close contact with each other at the division surface.

[0005] In the technology disclosed in Patent Document 1, the biasing claw is made of resin. However, because resin has creep characteristics, if the biasing claw (spring) is made of resin, the spring will deteriorate over time. When the spring deteriorates over time in this way, it cannot apply sufficient force to the magnetic core. For this reason, when the noise elimination device is attached to the outer periphery of the signal cable, it becomes difficult to bring the two divided magnetic cores into close contact with each other at the divided surfaces.

[0006] In view of the above problems, an object of the present invention is to provide a housing for a magnetic core and a noise elimination device capable of applying a sufficient force to a magnetic core. [Means for solving the problem]

[0007] A magnetic core casing according to one embodiment of the present invention is a casing for a magnetic core made of a resin material capable of accommodating a cylindrical magnetic core having a cavity extending in a central axis direction, the casing comprising: a first casing capable of accommodating a first core, which is one of the magnetic cores divided by a plane along the central axis; a second casing capable of accommodating a second core, which is the other of the magnetic cores divided by the plane along the central axis; a hinge connecting the first casing and the second casing so that the first casing can be opened and closed; and a first metal spring provided in the first casing and applying a force to the first core in a direction toward the central axis when the first core is accommodated, the first metal spring having a planar portion and a pair of spring portions inclined from both ends of the planar portion in the direction in which the central axis extends toward the central axis, and comprising reinforcing means for suppressing bending of the planar portion due to the force transmitted from the pair of spring portions when the first core is accommodated in the first casing.

[0008] A noise removal device according to one aspect of the present invention includes the above-mentioned housing for a magnetic core, a first core housed in the first housing, and a second core housed in the second housing. Effect of the Invention

[0009] The present invention can provide a housing for a magnetic core and a noise elimination device capable of applying a sufficient force to a magnetic core. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a magnetic core casing according to a first embodiment. [Diagram 2]1 is a perspective view showing a magnetic core casing according to a first embodiment. [Diagram 3] 2 is a perspective view showing an example of a metal spring included in the magnetic core casing according to the first embodiment. FIG. [Figure 4] 1 is a perspective view of a magnetic core housing according to a first embodiment, seen from the outside; FIG. [Diagram 5] 1 is a cross-sectional view showing a state in which a magnetic core is attached to a magnetic core casing according to a first embodiment. [Figure 6] FIG. 11 is a perspective view showing a magnetic core casing according to a second embodiment. [Figure 7] FIG. 11 is a perspective view showing a magnetic core casing according to a second embodiment. [Figure 8] 13 is a perspective view showing an example of a metal spring included in a magnetic core casing according to a second embodiment. FIG. [Figure 9] 11 is a cross-sectional view showing a state in which a magnetic core is attached to a magnetic core casing according to a second embodiment. FIG. [Figure 10] 4 is a cross-sectional view for explaining the relationship in size between a magnetic core and a metal spring. FIG. [Figure 11] FIG. 4 is a cross-sectional view for explaining the size of a metal spring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] <Embodiment 1> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 and Fig. 2 are perspective views showing a casing for a magnetic core according to the first embodiment. Fig. 3 is a perspective view showing an example of a metal spring provided in the casing for a magnetic core according to the first embodiment. Fig. 4 is a perspective view showing the casing for a magnetic core according to the first embodiment as viewed from the outside. Fig. 5 is a cross-sectional view showing a state in which a magnetic core is attached to the casing for a magnetic core according to the first embodiment.

[0012] As shown in Fig. 1, the magnetic core housing 1 according to this embodiment is a housing capable of housing magnetic cores 50a, 50b, and includes a housing 10a (first housing) and a housing 10b (second housing) that are divided into two parts on a plane along a central axis 18. The magnetic core housing 1 according to this embodiment is made of a resin material. In this specification, the housings 10a, 10b may be collectively referred to as the housing 10.

[0013] The magnetic cores 50a and 50b housed in the housing 1 for magnetic cores are cylindrical magnetic cores having a cavity 19 extending in the direction of the central axis 18 (the longitudinal direction of the housing 1 for magnetic cores) when the housing 1 for magnetic cores is in a closed state. The magnetic cores 50a and 50b are made of a magnetic material such as ferrite. The magnetic cores 50a and 50b are divided into two parts on a plane along the central axis 18, and one of the divided magnetic cores 50a (first core) is housed in the housing 10a, and the other divided magnetic core 50b (second core) is housed in the housing 10b. Note that FIG. 1 and FIG. 2 show a state in which the magnetic core 50b is housed only in the housing 10b. In addition, in this specification, the magnetic cores 50a and 50b may be collectively referred to as the magnetic core 50.

[0014] Housings 10a and 10b are connected to each other so as to be openable and closable by means of hinges 11. Fig. 1 and Fig. 2 show housings 10a and 10b in an open state. Housings 10a and 10b are closed by rotating housings 10a and 10b around hinge 11 and fitting claws 13 provided on housing 10a into holes 12 provided on housing 10b, thereby closing housings 10a and 10b.

[0015] The noise elimination device according to this embodiment is used in a state in which the magnetic cores 50a and 50b are housed in the magnetic core housing 1. That is, the noise elimination device according to this embodiment is used by attaching the magnetic core housing 1 housing the magnetic cores 50a and 50b to the outer periphery of a signal cable. When the housings 10a and 10b are in a closed state, the magnetic cores 50a and 50b are cylindrical with a cavity 19 extending in the direction of the central axis 18, and the signal cable is disposed in the cavity 19 of the magnetic cores 50a and 50b.

[0016] The magnetic core housing 1 according to the present embodiment includes a metal spring 20. The metal spring 20 is provided on the inner peripheral surface 15 (see FIG. 2) of the housings 10a and 10b. When the two divided magnetic cores 50a and 50b are housed in the housings 10a and 10b, the metal spring 20 applies a force to each magnetic core 50 in a direction toward the central axis 18. This allows the two divided magnetic cores 50a and 50b to be in close contact with each other at the division surface when the noise elimination device is attached to the outer periphery of the signal cable. It is preferable that the metal spring 20 is provided on both the housings 10a and 10b, but in this embodiment, the metal spring 20 may be provided on only one of the housings 10a and 10b.

[0017] As shown in Fig. 1 and Fig. 3, the metal spring 20 includes a flat portion 21 and a pair of spring portions 22a, 22b. The pair of spring portions 22a, 22b are configured to incline from both ends in the direction in which the central axis 18 of the flat portion 21 extends (the longitudinal direction of the magnetic core housing 1) toward the central axis 18 side (the cavity 19 side). In this embodiment, the metal spring 20 includes a reinforcing means. The reinforcing means is a means for suppressing bending of the flat portion 21 due to a force transmitted from the pair of spring portions 22a, 22b to the flat portion 21 when the magnetic cores 50a, 50b are housed in the housings 10a, 10b.

[0018] 3, the flat surface portion 21 of the metal spring 20 is rectangular, and the reinforcing means 23a, 23b can be formed by folding back two sides of the rectangular flat surface portion 21 between the two sides on which the pair of spring portions 22a, 22b are formed, into an L-shaped cross section. In the configuration example shown in FIG. 3, the reinforcing means 23a, 23b are formed by folding back two opposing sides of the flat surface portion 21 to the side away from the central axis 18 (to the outside of the housings 10a, 10b) into an L-shaped cross section.

[0019] As shown in Fig. 2 and Fig. 4, holes 16a and 16b are provided at positions corresponding to the reinforcing means 23a and 23b of the housings 10a and 10b, respectively. The reinforcing means 23a and 23b are positioned by being inserted into the holes 16a and 16b of the housings 10a and 10b, respectively. In particular, in this embodiment, the reinforcing means 23a and 23b are inserted into the linear holes (long holes) 16a and 16b, so that the movement of the metal spring 20 in the direction in which the central axis 18 extends and in the direction perpendicular to the central axis 18 can be suppressed. In addition, in this configuration, as shown in Fig. 4, it is possible to visually check from the outside of the housings 10a and 10b whether the reinforcing means 23a and 23b are accurately inserted into the holes 16a and 16b.

[0020] In this embodiment, as shown in FIG. 3, a hole 25 is formed in the center of the flat portion 21 of the metal spring 20. Also, as shown in FIG. 2, a protrusion 17 is provided on the inner peripheral surface 15 of the housings 10a and 10b. In this embodiment, the protrusion 17 provided on the housings 10a and 10b is further positioned by fitting into the hole 25 of the metal spring 20. Also, the protrusion 17 functions as a stopper that limits the amount of pressing of the metal spring 20. Specifically, the height of the protrusion 17 is adjusted so that the elastic limit of the spring portion 22 is not exceeded when the spring portion 22 is pressed by the magnetic core 50.

[0021] The metal spring 20 abuts against the surface 52 (see FIG. 5) of the magnetic core 50a at the abutment parts 24a and 24b. When the magnetic core 50 is housed in the housings 10a and 10b, the abutment parts 24a and 24b of the metal spring 20 slide against the surface 52 (see FIG. 5) of the magnetic core 50a. It is preferable that the outer periphery of the magnetic core 50 facing the metal spring 20 is flat. In other words, if the surface that the abutment part 24 abuts against is a curved surface and the magnetic core is shaped so as to contact the abutment part 24 of the metal spring 20 at a point, sufficient reaction force cannot be obtained, and the effect of the metal spring 20 is reduced. Therefore, it is preferable that the surface 52 that the abutment part 24 abuts against is a flat surface parallel to the abutment part 24 of the metal spring 20.

[0022] The metal spring 20 may have a structure in which the ends of the pair of spring parts 22a, 22b opposite to the flat part 21 are folded back toward the side away from the central axis 18. That is, the longitudinal ends of the spring parts 22a, 22b may be folded back toward the outside of the housings 10a, 10b. This allows the contact surfaces between the contact parts 24a, 24b and the surface 52 of the magnetic core 50 to be substantially linear. Therefore, when the magnetic core 50 is housed in the housings 10a, 10b, the contact parts 24a, 24b can easily slide on the surface 52 of the magnetic core 50 (see FIG. 5).

[0023] 5, when the magnetic core 50a is housed in the housing 10a, the magnetic core 50a comes into contact with the metal spring 20. As a result, a force acts on the magnetic core 50a toward the central axis 18. In addition, a cutout portion 51 is formed on the side surface of the magnetic core 50a, and the protrusion portion 14 formed on the housing 10a comes into contact with the cutout portion 51, thereby preventing the magnetic core 50a from falling off the housing 10a.

[0024] Furthermore, when the noise elimination device (magnetic core housing 1 containing magnetic core 50) is attached to the outer periphery of a signal cable, the signal cable is placed in cavity 19 of magnetic core 50. Since a force from metal spring 20 toward central axis 18 acts on magnetic core 50, the two divided magnetic cores 50a, 50b can be brought into close contact with each other at the divided surfaces.

[0025] As described above, in this embodiment, since metal is used as the material of the spring (metal spring 20), deterioration of the spring over time can be suppressed. In addition, in this embodiment, reinforcing means 23a and 23b are provided to suppress bending of the flat portion 21 due to the force transmitted from the pair of spring portions 22a and 22b of the metal spring 20 when the magnetic core 50 is housed in the housing 10. That is, by providing reinforcing means 23a and 23b by folding back two opposing sides of the flat portion 21 into an L-shaped cross section, it is possible to suppress bending of the center of the flat portion 21 when the pair of spring portions 22a and 22b are displaced. This makes it possible to suppress dispersion of the reaction force of the metal spring 20, and to concentrate the elastic force of the metal spring 20 toward the central axis 18 side.

[0026] Therefore, when the magnetic core 50 is housed in the housing 10, a sufficient force can be applied to the magnetic core 50 using the metal spring 20. Therefore, when the noise elimination device is attached to the outer periphery of a signal cable, the two divided magnetic cores 50a, 50b can be brought into close contact with each other at the divided surfaces.

[0027] <Embodiment 2> Next, a second embodiment of the present invention will be described. Fig. 6 and Fig. 7 are perspective views showing a magnetic core casing according to the second embodiment. Fig. 8 is a perspective view showing an example of a metal spring provided in the magnetic core casing according to the second embodiment. Fig. 9 is a cross-sectional view showing a state in which a magnetic core is attached to the magnetic core casing according to the second embodiment.

[0028] The magnetic core casing 2 according to the second embodiment differs from the magnetic core casing 1 according to the first embodiment in the structure of the metal spring 40 and the structure of a part of the casing 30. The other configurations are the same as those of the magnetic core casing 1 according to the first embodiment, so the same components are given the same reference numerals and duplicated explanations are omitted as appropriate.

[0029] As shown in FIG. 6, the magnetic core housing 2 according to this embodiment is a housing capable of housing the magnetic cores 50a and 50b, and includes a housing 30a (first housing) and a housing 30b (second housing) that are divided into two parts on a plane along a central axis 18. The housings 30a and 30b are connected to each other by a hinge 11 so as to be openable and closable. The magnetic core housing 2 according to this embodiment is made of a resin material. In this specification, the housings 30a and 30b may be collectively referred to as the housing 30.

[0030] The magnetic cores 50a and 50b are divided into two parts on a plane along the central axis 18, and one of the divided magnetic cores 50a (first core) is housed in the housing 30a, and the other divided magnetic core 50b (second core) is housed in the housing 30b. Note that Fig. 6 shows a state in which the magnetic core 50b is housed only in the housing 30b.

[0031] The magnetic core housing 2 according to the present embodiment includes a metal spring 40. The metal spring 40 is provided on the inner peripheral surface 31 (see FIG. 7) of the housings 30a and 30b. When the two divided magnetic cores 50a and 50b are housed in the housings 30a and 30b, the metal spring 40 applies a force toward the central axis 18 to each of the magnetic cores 50. This allows the two divided magnetic cores 50a and 50b to be in close contact with each other at the divided surface when the noise elimination device is attached to the outer periphery of the signal cable. Note that the metal spring 40 is preferably provided on both the housings 30a and 30b, but in this embodiment, the metal spring 40 may be provided only on one of the housings 30a and 30b.

[0032] As shown in Fig. 6 and Fig. 8, the metal spring 40 includes a flat portion 41 and a pair of spring portions 42a, 42b. The pair of spring portions 42a, 42b are configured to incline from both ends in the direction in which the central axis 18 of the flat portion 41 extends (the longitudinal direction of the magnetic core housing 2) toward the central axis 18 side (the cavity 19 side). In this embodiment, the metal spring 40 includes a reinforcing means. The reinforcing means is a means for suppressing bending of the flat portion 41 due to a force transmitted from the pair of spring portions 42a, 42b to the flat portion 41 when the magnetic cores 50a, 50b are housed in the housings 30a, 30b.

[0033] 8, the flat surface portion 41 of the metal spring 40 is rectangular, and the reinforcing means 43a, 43b can be formed by folding back two sides of the rectangular flat surface portion 41 between the two sides on which the pair of spring portions 42a, 42b are formed, into an L-shaped cross section. In the configuration example shown in FIG. 8, the reinforcing means 43a, 43b are formed by folding back two opposing sides of the flat surface portion 41 toward the central axis 18 side (the inside of the housings 30a, 30b) into an L-shaped cross section.

[0034] As shown in FIG. 7, four standing portions 32a to 32d are formed on the inner peripheral surface 31 of the housing 30a. A wall portion 33a is formed between the standing portion 32a and the standing portion 32b. A wall portion 33b is formed between the standing portion 32c and the standing portion 32d. When the metal spring 40 is attached to the housing 30a, the four standing portions 32a to 32d abut against the four corners of the flat portion 41 of the metal spring 40. In addition, the outer wall surface of the reinforcing means 43a abuts against the wall portion 33a between the standing portion 32a and the standing portion 32b. In addition, the outer wall surface of the reinforcing means 43b abuts against the wall portion 33b between the standing portion 32c and the standing portion 32d. With this configuration, the movement of the metal spring 20 in the direction in which the central axis 18 extends and in the direction perpendicular to the central axis 18 can be suppressed.

[0035] The metal spring 40 abuts against a surface 56 (see FIG. 9) of the magnetic core 50a at abutment portions 44a, 44b. When the magnetic core 50 is housed in the housings 30a, 30b, the abutment portions 44a, 44b of the metal spring 40 slide on the surface 56 (see FIG. 9) of the magnetic core 50a.

[0036] The metal spring 40 may have a structure in which the ends of the pair of spring parts 42a, 42b opposite to the flat part 41 are folded back toward the side away from the central axis 18. That is, the longitudinal ends of the spring parts 42a, 42b may be folded back toward the outside of the housings 30a, 30b. This allows the contact surfaces between the contact parts 44a, 44b and the surface 56 of the magnetic core 50 to be substantially linear. Therefore, when the magnetic core 50 is housed in the housings 30a, 30b, the contact parts 44a, 44b can easily slide on the surface 56 of the magnetic core 50 (see FIG. 9). In this embodiment, similarly to the configuration of embodiment 1, protrusions 17 (see FIG. 2) may be provided on the inner surfaces of the housings 30a and 30b, and holes 25 (see FIG. 3) may be provided in the metal spring 40, and the protrusions 17 provided on the housings 30a and 30b may be fitted into the holes 25 of the metal spring 40.

[0037] 9, when the magnetic core 50a is housed in the housing 30a, the magnetic core 50a comes into contact with the metal spring 40. As a result, a force acts on the magnetic core 50a toward the central axis 18. In addition, a cutout portion 55 is formed on the side surface of the magnetic core 50a, and the protrusion portion 35 formed on the housing 30a comes into contact with the cutout portion 55, thereby preventing the magnetic core 50a from falling off the housing 30a.

[0038] Furthermore, when the noise elimination device (magnetic core housing 2 containing magnetic core 50) is attached to the outer periphery of a signal cable, the signal cable is placed in cavity 19 of magnetic core 50a. Since a force from metal spring 20 toward central axis 18 acts on magnetic core 50, the two divided magnetic cores 50a, 50b can be brought into close contact with each other at the divided surfaces.

[0039] As in the first embodiment, when the magnetic core 50 is housed in the housing 30, the magnetic core housing 2 according to the present embodiment described above can apply a sufficient force to the magnetic core 50 using the metal spring 40. Therefore, when the noise elimination device is attached to the outer periphery of the signal cable, the two divided magnetic cores 50a, 50b can be brought into close contact with each other at the divided surfaces.

[0040] <Other embodiments> 10 is a cross-sectional view for explaining the relationship in size between the magnetic core and the metal spring. For example, in the present invention, the relationship in size between the magnetic core 50 and the metal spring 20 may be as follows.

[0041] As shown in FIG. 10, the bottom width of the magnetic core 50 is W1, and the apex width of the metal spring 20 is W2. Here, the bottom width W1 corresponds to the length of the magnetic core 50 in the longitudinal direction. The apex width W2 is the distance between the points where the metal spring 20 contacts the magnetic core 50, and corresponds to the distance between the contact portion 24a and the contact portion 24b of the metal spring 20. In this embodiment, it is preferable to configure the range of the apex width W2 relative to the bottom width W1 (W2 / W1 range) to be 0.80 to 0.90. By setting the lower limit to 0.80, it is possible to prevent the elastic limit of the spring portion 22 from being exceeded when the spring portion 22 is most pressed by the magnetic core 50 due to vibration or the like. Also, by setting the upper limit to 0.90, it is possible to prevent the longitudinal end of the spring portion 22 from coming off the magnetic core 50 when the spring portion 22 is most pressed by the magnetic core 50 due to vibration or the like.

[0042] It should be noted that W2 / W1 is the dimensional ratio when the housing 1 for magnetic core is closed, that is, when the magnetic core 50 and the metal spring 20 are set in the housing 10 and the housing 1 for magnetic core is in the closed state. In addition, although Fig. 10 shows the relationship in size between the magnetic core 50 and the metal spring 20 (embodiment 1), the same applies to the relationship in size between the magnetic core 50 and the metal spring 40 (embodiment 2).

[0043] 11 is a cross-sectional view for explaining the size of the metal spring. For example, in the present invention, the size of the metal spring 20 may be as follows.

[0044] 11, the distance between the contact portions 24a and 24b of the metal spring 20 is defined as the apex width W2 (similar to the case of FIG. 10). The width of the flat portion 21 of the metal spring 20 is defined as the spring bottom width W3.

[0045] In this embodiment, it is preferable to configure the range of the spring bottom width W3 relative to the apex width W2 of the metal spring 20 (W3 / W2 range) to be 0.10 to 0.25. By setting the lower limit to 0.10, it is possible to suppress dispersion of the reaction force of the metal spring 20 and obtain a sufficient reaction force. Also, by setting the upper limit to 0.25, it is possible to prevent the elastic limit of the spring portion 22 from being exceeded when the spring portion 22 is most pressed by the magnetic core 50 due to vibration or the like.

[0046] It should be noted that W3 / W2 is the dimensional ratio when the magnetic core housing 1 is closed, that is, when the magnetic core 50 and the metal spring 20 are set in the housing 10 and the magnetic core housing 1 is in the closed state. In addition, although Fig. 11 shows the size of the metal spring 20 (embodiment 1), the same applies to the size of the metal spring 40 (embodiment 2).

[0047] In the above embodiment, the reinforcing means 23a and 23b are formed by folding back two sides of the flat portion 21 of the metal spring 20 to have an L-shaped cross section. However, in the present invention, the reinforcing means may be formed using the housing 10. For example, the flat portion 21 of the metal spring 20 (in this case, the reinforcing means 23a and 23b are not formed) may be embedded in a part of the housing 10, and the flat portion 21 of the metal spring 20 may be reinforced by the housing 10 itself. In detail, the two sides of the flat portion 21 between the two sides on which the pair of spring portions 22a and 22b are formed may be embedded in the housing 10. This makes it possible to suppress the center of the flat portion 21 from bending when the pair of spring portions 22a and 22b are displaced. Therefore, it is possible to suppress the reaction force of the metal spring 20 from being dispersed, and it is possible to concentrate the elastic force of the metal spring 20 toward the central axis 18. Therefore, when the magnetic core 50 is accommodated in the housing 10, the magnetic core 50 can be given a sufficient force by using the metal spring 20.

[0048] In the configuration of the first embodiment, the tip portions of the reinforcing means 23a, 23b of the metal spring 20 may be bent and hooked to the housing 10 in a snap-fit ​​manner. Specifically, the tip portions of the reinforcing means 23a, 23b may be slightly bent inward or outward, and the bent portions may be hooked to the outside of the housing 10 after the reinforcing means 23a, 23b are inserted into the holes 16a, 16b. In this case, if the holes 16a, 16b of the housing 10 are substantially vertical, it may be difficult to insert the reinforcing means 23a, 23b into the holes 16a, 16b. In such a case, the holes 16a, 16b of the housing 10 may be inclined inward or outward to make it easier to insert the reinforcing means 23a, 23b into the holes 16a, 16b.

[0049] While the present invention has been described above in accordance with the above-described embodiment, the present invention is not limited to the configuration of the above-described embodiment, and naturally includes various modifications, alterations, and combinations that may be made by a person skilled in the art within the scope of the invention as defined in the claims of the present application. [Explanation of symbols]

[0050] 1, 2 Housing for magnetic core 10a, 10b Housing 11 Hinge 12 Hole 13. Nails 14 Protrusion 15 Inner surface 16a, 16b holes 17 Protrusion 18 Center axis 19 Cavity 20, 40 Metal spring 21, 41 Plane section 22a, 22b, 42a, 42b Spring part 23a, 23b, 43a, 43b Reinforcement means 24a, 24b, 44a, 44b Contact part 25 Hole 30a, 30b Housing 31 Inner surface 32a~32d Standing section 33a, 33b wall 35 Protrusion 50a, 50b Magnetic core (core) 51, 55 Cutout

Claims

1. A housing for a magnetic core made of a resin material capable of housing a cylindrical magnetic core having a cavity extending in a central axis direction, a first housing capable of accommodating a first core, which is one of the magnetic cores divided along a plane along the central axis; a second housing capable of accommodating a second core, which is the other core separated from the magnetic core by a plane along the central axis; a hinge that connects the first housing and the second housing in an openable and closable manner; a first metal spring provided in the first housing and configured to apply a force to the first core in a direction toward the central axis when the first core is housed in the first housing; the first metal spring has a flat portion and a pair of spring portions inclined from both ends of the flat portion in a direction in which the central axis extends toward the central axis, a reinforcing means for suppressing bending of the planar portion due to a force transmitted from the pair of spring portions when the first core is housed in the first housing, The planar portion is rectangular, the reinforcing means is formed by folding back two sides of the rectangular planar portion between two sides on which the pair of spring portions are formed, toward sides away from the central axis, so as to have an L-shaped cross section, the first housing has holes at positions corresponding to the reinforcing means, each of the reinforcing means is positioned by being inserted into each of the holes of the first housing; Housing for magnetic core.

2. A housing for a magnetic core made of a resin material capable of housing a cylindrical magnetic core having a cavity extending in a central axis direction, a first housing capable of accommodating a first core, which is one of the magnetic cores divided along a plane along the central axis; a second housing capable of accommodating a second core, which is the other core separated from the magnetic core by a plane along the central axis; a hinge that connects the first housing and the second housing in an openable and closable manner; a first metal spring provided in the first housing and configured to apply a force to the first core in a direction toward the central axis when the first core is housed in the first housing; the first metal spring has a flat portion and a pair of spring portions inclined from both ends of the flat portion in a direction in which the central axis extends toward the central axis, a reinforcing means for suppressing bending of the planar portion due to a force transmitted from the pair of spring portions when the first core is housed in the first housing, The planar portion is rectangular, the reinforcing means is formed by folding back two sides of the rectangular planar portion between two sides on which the pair of spring portions are formed, toward the central axis, so as to have an L-shaped cross section, Wall portions are provided at positions of the first housing corresponding to the reinforcing means, Each of the reinforcing means is positioned by abutting against each of the walls of the first housing. Housing for magnetic core.

3. A housing for a magnetic core made of a resin material capable of housing a cylindrical magnetic core having a cavity extending in a central axis direction, a first housing capable of accommodating a first core, which is one of the magnetic cores divided along a plane along the central axis; a second housing capable of accommodating a second core, which is the other core separated from the magnetic core by a plane along the central axis; a hinge that connects the first housing and the second housing in an openable and closable manner; a first metal spring provided in the first housing and configured to apply a force to the first core in a direction toward the central axis when the first core is housed in the first housing; the first metal spring has a flat portion and a pair of spring portions inclined from both ends of the flat portion in a direction in which the central axis extends toward the central axis, a reinforcing means for suppressing bending of the planar portion due to a force transmitted from the pair of spring portions when the first core is housed in the first housing, the reinforcing means is the first housing, The planar portion is embedded in a portion of the first housing. Housing for magnetic core.

4. The magnetic core housing according to any one of claims 1 to 3, wherein the first metal spring has ends of the pair of spring portions opposite the planar portion folded back toward a side away from the central axis.

5. a second metal spring provided in the second housing and configured to apply a force to the second core in a direction toward the central axis when the second core is housed in the second housing; the second metal spring has a flat portion and a pair of spring portions inclined from both ends of the flat portion in a direction in which the central axis extends toward the central axis, a reinforcing means for suppressing bending of the planar portion due to a force transmitted from the pair of spring portions when the second core is housed in the housing; The housing for a magnetic core according to any one of claims 1 to 4.

6. A housing for a magnetic core according to any one of claims 1 to 5, a first core accommodated in the first housing; a second core accommodated in the second housing; Noise removal device.

Images