JP6842772B2 - Noise countermeasure member - Google Patents

Description

The present disclosure relates to noise suppression members.

There is known a noise suppression member configured to prevent a magnetic material from detaching from the case when the case is opened (see, for example, Patent Document 1). In the case of the noise suppression member described in Patent Document 1, an engaging claw is provided on the case, and an engaging groove is provided on the magnetic material. When the magnetic material is attached to the case, the engaging claws are caught in the engaging grooves. As a result, even if the case is opened, the magnetic material does not separate from the case.

Jikken 04-012653

By the way, when the case is closed, the magnetic material does not separate from the case regardless of the presence or absence of the above-mentioned engaging claws. Therefore, the above-mentioned engaging claws have not been effectively used when the case is closed.
In one aspect of the present disclosure, it is intended to provide a noise suppression member having a structure for suppressing detachment of a magnetic material when the case is opened and a structure for effectively using the structure even when the case is closed. Is desirable.

One aspect of the present disclosure is a noise countermeasure member, comprising a magnetic core and a case for accommodating the magnetic core, and the magnetic core has two divided cores each composed of a magnetic material. The case is formed into a tubular shape by contact, and each has two accommodating portions for accommodating the split core and a fixing mechanism for fixing the two accommodating portions to each other, and each accommodating portion accommodates the split core. When the two accommodating portions are fixed to each other by the fixing mechanism, the two dividing cores are held in a tubular state, and the accommodating portions are arranged at positions along the outer periphery of the magnetic core. It has a peripheral wall portion, and one end of the peripheral wall portion is a fixed end and the other end is a free end, and the free end is configured to be displaceable with respect to the fixed end as the two ends are elastically deformed. An elastic movable wall is provided, and at a position on the inner peripheral side of the elastic movable wall and on the free end side of the center between both ends of the elastic movable wall, a locking projection protruding toward the radial inner peripheral side of the peripheral wall portion is provided. At a position on the inner peripheral side of the elastic movable wall and on the fixed end side of the center between both ends of the elastic movable wall, a pressure protrusion projecting toward the radial inner peripheral side of the peripheral wall portion is provided. When the two accommodating portions are not fixed to each other, the locking projection is hooked on the split core so that the split core can be prevented from detaching from the accommodating portion, and the two accommodating portions are fixed to each other. In this state, the elastic movable wall is elastically deformed as the pressure protrusion and the split core come into contact with each other, so that the elastic movable wall urges the two split cores to approach each other. It is configured as follows.

According to the noise suppression member configured in this way, when the two accommodating portions are not fixed to each other, the locking projection is caught on the split core. As a result, it is possible to prevent the split core from detaching from the accommodating portion. Further, when the split core is taken in and out of the accommodating portion, the elastic movable wall can be elastically deformed so that the locking projection can be retracted to a position where it is not caught by the split core. Therefore, it is not necessary to deform the housing portion as a whole in order to remove the split core from the housing portion. Therefore, it is possible to prevent the accommodating portion from being damaged.

When the two accommodating portions are fixed to each other, the elastic movable wall is elastically deformed as the pressure projection and the split core come into contact with each other. As a result, the elastic movable wall urges the two split cores to approach each other. Therefore, unlike the above-mentioned conventional technique, it is possible to effectively utilize the elastic force generated by the elastic movable wall even when the two accommodating portions are fixed to each other, and to improve the adhesion between the two divided cores. Therefore, the magnetic properties of the magnetic core composed of the two divided cores can be improved.

FIG. 1A is a perspective view of the usage state of the noise suppression member as viewed from the upper left front. FIG. 1B is a perspective view of the usage state of the noise suppression member as viewed from the lower right front. FIG. 2A is a perspective view of the noise suppression member as viewed from the upper left front. FIG. 2B is a perspective view of the noise suppression member as viewed from the lower right front. FIG. 3A is a plan view of the noise suppression member. FIG. 3B is a left side view of the noise suppression member. FIG. 3C is a front view of the noise suppression member. FIG. 3D is a right side view of the noise suppression member. FIG. 3E is a rear view of the noise suppression member. FIG. 3F is a bottom view of the noise suppression member. FIG. 4 is a rear view of the case. FIG. 5 is a perspective view of the case. FIG. 6A is an explanatory view showing the positions of the elastic movable wall and the split core when the case is in the open state. FIG. 6B is an explanatory view showing the positions of the elastic movable wall and the split core when the case is in the closed state.

Next, the above-mentioned noise suppression member will be described with reference to exemplary embodiments. In the following description, the front-back, left-right, up-down directions, which are also shown in the figure, will be used for explanation. In each of these directions, the direction in which the portion appearing in the plan view of FIG. 3A is directed is upward, the direction in which the portion appearing in the left side view of FIG. 3B is directed is left, and the direction in which the portion appearing in the front view of FIG. 3C is directed. Front, the direction in which the part appearing in the right side view of FIG. 3D is directed is defined as the right, the direction in which the part appearing in the rear view of FIG. 3E is directed is defined as the rear, and the direction in which the part appearing in the bottom view of FIG. 3F is directed is defined as the bottom. Relative direction. However, each of these directions is merely a direction defined for briefly explaining the relative positional relationship of each part constituting the noise suppression member. Therefore, for example, when the noise suppression member is used, it is uncertain in what direction the noise suppression member is oriented.

[Structure of noise suppression member 1]
As shown in FIGS. 1A and 1B, the noise suppression member 1 is a member mounted on the outer periphery of the electric wire W to attenuate the noise current flowing through the electric wire W. The noise suppression member 1 includes a magnetic core 3 and a case 5 that houses the magnetic core 3. As shown in FIG. 3E, the magnetic core 3 is composed of two divided cores 3A and 3B. Each of the two divided cores 3A and 3B is composed of a magnetic material (ferrite in the case of this embodiment). The tubular magnetic core 3 is formed by bringing the two divided cores 3A and 3B into contact with each other.

Case 5 includes two housing portions 7A and 7B (see FIGS. 3A, 3B, 3C, 3D and 3F), two hinge portions 9A and 9B (see FIGS. 1B and 3C), and two locks. It has parts 11A and 11B (see FIG. 1A). Each part constituting the case 5 is integrally molded with a resin material (polyamide in the case of this embodiment). The accommodating portion 7A is configured to accommodate the split core 3A. The accommodating portion 7B is configured to accommodate the split core 3B. However, in the present embodiment, the split cores 3A and 3B have the same shape.

The two hinge portions 9A and 9B connect the two accommodating portions 7A and 7B so as to be openable and closable. As shown in FIGS. 2A and 2B, the lock portion 11A has an engaged portion 13A provided in one accommodating portion 7A and an engaging portion 15A provided in the other accommodating portion 7B. The lock portion 11B has an engaged portion 13B provided in one accommodating portion 7A and an engaging portion 15B provided in the other accommodating portion 7B.

When the two accommodating portions 7A and 7B are closed (see FIGS. 1A and 1B), the engaging portion 15A is caught in the hole of the engaged portion 13A in the locking portion 11A. Further, in the lock portion 11B, the engaging portion 15B is caught in the hole of the engaged portion 13B. As a result, the two locking portions 11A and 11B are in a state of preventing the two accommodating portions 7A and 7B from being opened. At this time, the two accommodating portions 7A and 7B are fixed to each other by the two hinge portions 9A and 9B and the two locking portions 11A and 11B. These two hinge portions 9A and 9B and the two lock portions 11A and 11B correspond to an example of the fixing mechanism referred to in the present disclosure.

When the split core 3A is accommodated in the accommodating portion 7A, the divided core 3B is accommodated in the accommodating portion 7B, and the two accommodating portions 7A and 7B are fixed to each other by the hinge portions 9A and 9B and the locking portions 11A and 11B, the two accommodating portions 7A and 7B are divided into two. The cores 3A and 3B are held in a tubular shape. The accommodating portion 7A has a peripheral wall portion 17A arranged at a position along the outer periphery of the magnetic core 3 and a position along the end surface of the magnetic core 3 in the axial direction (the left-right direction in FIGS. 1A and 1B). It has end wall portions 19A and 19B arranged in. The accommodating portion 7B has a peripheral wall portion 17B arranged at a position along the outer periphery of the magnetic core 3, and end wall portions 19C and 19D arranged at positions along the axial end surface of the magnetic core 3. ..

As shown in FIGS. 4 and 5, a part of the peripheral wall portion 17A is an elastic movable wall 21A, 21B, 22A, 22B. The elastic movable walls 21A, 21B, 22A, and 22B are portions that are elastically deformable like leaf springs. More specifically, the elastic movable walls 21A, 21B, 22A, 22B have a fixed end at one end and a free end at the other end, and the free end can be displaced with respect to the fixed end as the two ends are elastically deformed. It is configured in.

As shown in FIGS. 4 and 5, a part of the peripheral wall portion 17B is an elastic movable wall 21C, 21D, 22C, 22D. The elastic movable walls 21C, 21D, 22C, and 22D are elastically deformable portions such as leaf springs. More specifically, the elastic movable walls 21C, 21D, 22C, 22D have a fixed end at one end and a free end at the other end, and the free end can be displaced with respect to the fixed end as the two ends are elastically deformed. It is configured in.

The two elastic movable walls 21A and 21B are provided at intervals in the axial direction (the left-right direction in FIGS. 1A and 1B) of the peripheral wall portion 17A. The two elastic movable walls 21C and 21D are provided at intervals in the axial direction of the peripheral wall portion 17B (the left-right direction in FIGS. 1A and 1B). As a result, on the outer peripheral side of the peripheral wall portion 17A, a binding band (not shown) can be wound around the winding region 23 between the two elastic movable walls 21A and 21B and between the two elastic movable walls 21C and 21D. Is secured. The elastic movable wall 22A and the elastic movable wall 22C are connected via a hinge portion 9A. The elastic movable wall 22B and the elastic movable wall 22D are connected via a hinge portion 9B.

The elastic movable wall 21A is provided with one locking projection 31A, two pressure projections 32A and 32B, and one stopper 33A. The elastic movable wall 21B is provided with one locking projection 31B, two pressure projections 32C and 32D, and one stopper 33B. The elastic movable wall 21C is provided with one locking projection 31C, two pressure projections 32E and 32F, and one stopper 33C. The elastic movable wall 21D is provided with one locking projection 31D, two pressure projections 32G and 32H, and one stopper 33D. The elastic movable wall 22A is provided with one locking projection 31E. The elastic movable wall 22B is provided with one locking projection 31F. The elastic movable wall 22C is provided with one locking projection 31G. The elastic movable wall 22D is provided with one locking projection 31H.

The locking projection 31A is located on the inner peripheral side of the elastic movable wall 21A and on the free end side of the center between both ends of the elastic movable wall 21A. The locking projection 31A projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17A. The locking projection 31B is located on the inner peripheral side of the elastic movable wall 21B and on the free end side of the center between both ends of the elastic movable wall 21B. The locking projection 31B projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17A.

The locking projection 31C is located on the inner peripheral side of the elastic movable wall 21C and on the free end side of the center between both ends of the elastic movable wall 21C. The locking projection 31C projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17B. The locking projection 31D is located on the inner peripheral side of the elastic movable wall 21D and on the free end side of the center between both ends of the elastic movable wall 21D. The locking projection 31D projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17B.

The pressure projections 32A and 32B are located on the inner peripheral side of the elastic movable wall 21A and on the fixed end side of the center between both ends of the elastic movable wall 21A. The pressure projections 32A and 32B project toward the inner peripheral side in the radial direction of the peripheral wall portion 17A. The pressure projections 32C and 32D are located on the inner peripheral side of the elastic movable wall 21B and on the fixed end side of the center between both ends of the elastic movable wall 21B. The pressure projections 32C and 32D project toward the inner peripheral side in the radial direction of the peripheral wall portion 17A.

The pressure projections 32E and 32F are located on the inner peripheral side of the elastic movable wall 21C and on the fixed end side of the center between both ends of the elastic movable wall 21C. The pressure projections 32E and 32F project toward the inner peripheral side in the radial direction of the peripheral wall portion 17B. The pressure projections 32G and 32H are located on the inner peripheral side of the elastic movable wall 21D and on the fixed end side of the center between both ends of the elastic movable wall 21D. The pressure projections 32G and 32H project toward the inner peripheral side in the radial direction of the peripheral wall portion 17B.

The locking projections 31A and the pressure projections 32A and 32B are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17A. More specifically, the two pressure projections 32A and 32B are provided at positions spaced apart from each other in the axial direction of the peripheral wall portion 17A. The locking projection 31A is located at a position corresponding to the gap between the two pressure projections 32A and 32B in the axial direction of the peripheral wall portion 17A.

The locking projections 31B and the pressure projections 32C and 32D are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17A. More specifically, the two pressure projections 32C and 32D are provided at positions spaced apart from each other in the axial direction of the peripheral wall portion 17A. The locking projection 31B is located at a position corresponding to the gap between the two pressure projections 32C and 32D in the axial direction of the peripheral wall portion 17A.

The locking projections 31C and the pressure projections 32E and 32F are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17B. More specifically, the two pressure projections 32E and 32F are provided at positions spaced apart from each other in the axial direction of the peripheral wall portion 17B. The locking projection 31C is located at a position corresponding to the gap between the two pressure projections 32E and 32F in the axial direction of the peripheral wall portion 17B.

The locking projections 31D and the pressure projections 32G and 32H are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17B. More specifically, the two pressure projections 32G and 32H are provided at positions spaced apart from each other in the axial direction of the peripheral wall portion 17B. The locking projection 31D is located at a position corresponding to the gap between the two pressure projections 32G and 32H in the axial direction of the peripheral wall portion 17B.

The stopper 33A is on the outer peripheral side of the elastic movable wall 21A. The stopper 33A projects toward the outer peripheral side of the peripheral wall portion 17A in the radial direction. The stopper 33B is on the outer peripheral side of the elastic movable wall 21B. The stopper 33B projects toward the outer peripheral side of the peripheral wall portion 17A in the radial direction. The stopper 33C is on the outer peripheral side of the elastic movable wall 21C. The stopper 33C projects toward the outer peripheral side of the peripheral wall portion 17B in the radial direction. The stopper 33D is on the outer peripheral side of the elastic movable wall 21D. The stopper 33D projects toward the outer peripheral side of the peripheral wall portion 17B in the radial direction. In the above-mentioned winding region 23, when the binding band is wound around the outer circumference of the case 5, the four stoppers 33A, 33B, 33C, 33D suppress the binding band from shifting in the axial direction along the outer circumference of the case 5. ..

The locking projection 31E is located on the inner peripheral side of the elastic movable wall 22A and on the free end side of the center between both ends of the elastic movable wall 22A. The locking projection 31E projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17A. The locking projection 31F is located on the inner peripheral side of the elastic movable wall 22B and on the free end side of the center between both ends of the elastic movable wall 22B. The locking projection 31F projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17A.

The locking projection 31G is located on the inner peripheral side of the elastic movable wall 22C and on the free end side of the center between both ends of the elastic movable wall 22C. The locking projection 31G projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17B. The locking projection 31H is located on the inner peripheral side of the elastic movable wall 22D and on the free end side of the center between both ends of the elastic movable wall 22D. The locking projection 31G projects toward the inner peripheral side in the radial direction of the peripheral wall portion 17B.

The accommodating portion 7A is provided with two urging portions 35A and 35B. The accommodating portion 7B is provided with two urging portions 35C and 35D. When the two accommodating portions 7A and 7B are closed, the urging portions 35A and 35B elastically deform by receiving a force from the split core 3A and urge the split core 3A toward the split core 3B side. When the two accommodating portions 7A and 7B are closed, the urging portions 35C and 35D are elastically deformed by receiving a force from the split core 3B to urge the split core 3B toward the split core 3A side.

[effect]
In the noise suppression member 1 configured as described above, the split core 3A is accommodated in the accommodating portion 7A. At that time, the locking projections 31A, 31B, 31E, 31F provided in the accommodating portion 7A are caught by the split core 3A. As a result, the locking projections 31A, 31B, 31E, and 31F suppress the split core 3A from detaching from the accommodating portion 7A. The split core 3B is accommodated in the accommodating portion 7B. At that time, the locking projections 31C, 31D, 31G, 31H provided in the accommodating portion 7B are caught by the split core 3B. As a result, the locking projections 31C, 31D, 31G, and 31H suppress the split core 3B from detaching from the accommodating portion 7B.

FIG. 6A illustrates the locking projection 31A. When the two accommodating portions 7A and 7B are not fixed to each other, the split core 3A is urged by the urging portions 35A and 35B and is in a position where it comes into contact with the locking projection 31A. In this state, the locking projection 31A is caught in the engaging groove 37A provided in the split core 3A. Although not shown, the locking projections 31B, 31C, and 31D are also hooked on the split core 3A by the same mechanism. As a result, it is possible to prevent the split core 3A from being separated from the accommodating portion 7A. The split core 3B can also be prevented from being separated from the accommodating portion 7B by the same mechanism.

When the split cores 3A and 3B are taken in and out of the accommodating portions 7A and 7B, if the elastic movable walls 21A, 21B, 21C, 21D, 22A, 22B, 22C and 22D are elastically deformed, the locking projections 31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H are retracted to a position where they are not caught by the split cores 3A, 3B. Therefore, the split cores 3A and 3B can be removed from the accommodating portions 7A and 7B. Therefore, in order to remove the split cores 3A and 3B from the accommodating portions 7A and 7B, it is not necessary to deform the accommodating portions 7A and 7B as a whole. Therefore, it is possible to prevent the accommodating portions 7A and 7B from being damaged.

On the other hand, when the two accommodating portions 7A and 7B are fixed to each other, as the two divided cores 3A and 3B come into contact with each other, the accommodating portions 7A in which the divided cores 3A and 3B accommodate each are accommodated. , 7B is pushed into the back. At this time, as the pressure projections 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H and the split cores 3A, 3B come into contact with each other, the elastic movable walls 21A, 21B, 21C, 21D have the peripheral wall portions 17A. , 17B elastically deforms to the outer peripheral side.

FIG. 6B illustrates the elastic movable wall 21A. The split core 3A is pushed deep into the accommodating portion 7A (that is, pushed from the position shown by the virtual line in FIG. 6B to the position shown by the solid line), and the elastic movable wall 21A moves toward the outer peripheral side of the peripheral wall portion 17A. When elastically deformed, the pressure projections 32A and 32B are in a state of pressure contact with the split core 3A. At this time, a part of the force acting on the split core 3A from the pressure projections 32A and 32B becomes a force for urging the split core 3A toward the split core 3B side. Therefore, if such a configuration is adopted, when the two accommodating portions 7A and 7B are fixed to each other, the elastic force generated by the elastic movable walls 21A, 21B, 21C and 21D can be effectively utilized, and the two accommodating portions 7A and 7B can be fixed to each other. The adhesion of the split cores 3A and 3B can be improved. Therefore, the magnetic characteristics of the magnetic core 3 composed of the two divided cores 3A and 3B can be improved.

In particular, in the case of the present embodiment, both the urging portions 35A, 35B, 35C, 35D and the elastic movable walls 21A, 21B, 21C, 21D are configured to press the divided cores 3A, 3B. Therefore, the force for bringing the divided cores 3A and 3B into close contact with each other can be enhanced as compared with the case where only the configurations corresponding to the urging portions 35A, 35B, 35C and 35D are provided. Alternatively, when it is not necessary to excessively increase the force for bringing the split cores 3A, 3B into close contact with each other, the urging portions 35A, 35B, in consideration of the increase in the urging force due to the elastic movable walls 21A, 21B, 21C, 21D, It is also possible to weaken the urging force of 35C and 35D.

If the urging force of the urging portions 35A, 35B, 35C, 35D can be weakened, the urging portions 35A, 35B, 35C, 35D can be made to have a structure with low springiness by that amount. In this case, the load applied to the urging portions 35A, 35B, 35C, 35D can be reduced. Therefore, it is possible to suppress a decrease in the urging force due to aged deterioration of the urging portions 35A, 35B, 35C, and 35D.
Further, if the split cores 3A and 3B are urged by both the urging portions 35A, 35B, 35C and 35D and the elastic movable walls 21A, 21B, 21C and 21D, the urging portions 35A, 35B, 35C and 35D are divided independently. Compared to the case of urging the cores 3A and 3B, the places where the load is applied are dispersed in many places. Therefore, it is possible to suppress a decrease in the urging force due to aged deterioration of the urging portions 35A, 35B, 35C, 35D as compared with the case where the load is concentrated only on the urging portions 35A, 35B, 35C, 35D.

Further, in the case of the present embodiment, the locking projections 31A and the pressure projections 32A and 32B are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17A. The locking projections 31B and the pressure projections 32C and 32D are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17A. The locking projections 31C and the pressure projections 32E and 32F are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17B. The locking projections 31D and the pressure projections 32G and 32H are provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion 17B.

Therefore, when each of these protrusions is viewed from a direction orthogonal to the axial direction of the peripheral wall portions 17A and 17B, the locking protrusions 31A, 31B, 31C and 31D and the pressure protrusions are compared with the case where they are provided at positions where they overlap each other. It is possible to prevent the mold structure required for forming 32A, 32B, 32C, 32D, 32E, 32F, 32G, and 32H from becoming complicated.
Further, in the case of the present embodiment, when the binding band is wound around the outer circumference of the case 5, the stoppers 33A, 33B, 33C, 33D can prevent the binding band from shifting in the axial direction along the outer circumference of the case 5. it can.

In particular, when the two accommodating portions 7A and 7B are fixed to each other, the pressure projections 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H and the split cores 3A, 3B come into contact with each other. The elastic movable walls 21A, 21B, 21C, and 21D are elastically deformed and displaced toward the outer peripheral side. At this time, the amount of protrusion of the stoppers 33A, 33B, 33C, 33D to the outer peripheral side increases. For example, the stopper 33A moves from the position shown by the virtual line to the position shown by the solid line in FIG. 6B, and the amount of protrusion thereof increases.

Therefore, when the two accommodating portions 7A and 7B are not fixed to each other, the amount of protrusion of the stoppers 33A, 33B, 33C and 33D is reduced, and some object becomes the stoppers 33A, 33B, 33C and 33D. You can prevent it from getting caught. Further, when the two accommodating portions 7A and 7B are fixed to each other, the amount of protrusion of the stoppers 33A, 33B, 33C and 33D is increased to improve the effect of suppressing the binding band from shifting. Can be done.

Further, in the case of the present embodiment, if the binding band is wound in the winding region 23, the stoppers 33A, 33B, 33C, and 33D are present on both sides of the binding band. Therefore, the effect of suppressing the displacement of the binding band can be enhanced as compared with the case where the stoppers 33A, 33B, 33C, and 33D exist only on one of the two sides sandwiching the region around which the binding band is wound.

[Other Embodiments]
The noise countermeasure members of the present disclosure have been described with reference to exemplary embodiments, but the above-described embodiments are merely exemplified as one aspect of the present disclosure. That is, the present disclosure is not limited to the above-described exemplary embodiments, and can be implemented in various forms without departing from the technical ideas of the present disclosure.

For example, in the above embodiment, two hinge portions 9A and 9B and two lock portions 11A and 11B are exemplified as an example of the fixing mechanism referred to in the present disclosure, but whether or not the hinge portions 9A and 9B are provided is optional. is there. For example, by providing two more lock portions (that is, by providing four lock portions) in place of the above-mentioned two hinge portions 9A and 9B, when the fixing by the fixing mechanism is released, two accommodations are provided. The portions 7A and 7B may be configured to be completely separated (that is, in a state where they are not connected by the hinge portions).

Further, in the above embodiment, an example including two hinge portions 9A and 9B and two lock portions 11A and 11B is shown, but the number of each of the hinge portions and the lock portions is also arbitrary. That is, the number of hinge portions may be one or three or more. The number of lock portions may be one, or may be three or more.
Further, in the above embodiment, the lock portions 11A and 11B having the engaged portions 13A and 13B and the engaging portions 15A and 15B are illustrated, but for the specific structure of the lock portion, the two accommodating portions 7A and 7B are used. Any structure can be adopted as long as it has a structure that can be fixed to each other.

The function realized by one component in each of the above embodiments may be configured to be realized by a plurality of components. Further, the function realized by a plurality of components may be configured to be realized by one component. Further, a part of the configuration of each of the above embodiments may be omitted. In addition, at least a part of the configuration of each of the above embodiments may be added or replaced with respect to the configuration of the other embodiment.

[Supplement]
As is clear from the exemplary embodiments described above, the noise suppression member of the present disclosure may further include the following configurations.
First, in the noise suppression member of the present disclosure, the locking projections and the pressure projections may be provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion.

According to the noise suppression member configured in this way, although both the locking projection and the pressure projection are provided on the inner peripheral side of the elastic movable wall, when viewed from a direction orthogonal to the axial direction of the peripheral wall portion. , Provided at positions that do not overlap each other. Therefore, it is necessary to form the locking projection and the pressing projection as compared with the case where the locking projection and the pressing projection are provided at positions overlapping each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion. It is possible to prevent the structure of the mold from becoming complicated.

Further, in the noise countermeasure member of the present disclosure, a stopper is provided on the outer peripheral side of the elastic movable wall so as to project toward the radial outer peripheral side of the peripheral wall portion, and when the binding band is wound around the outer periphery of the case, the binding is performed. A stopper may be used to prevent the band from shifting in the axial direction along the outer circumference of the case.
According to the noise suppression member configured in this way, when the binding band is wound around the outer circumference of the case, it is possible to prevent the binding band from shifting in the axial direction along the outer circumference of the case by the stopper. When the two accommodating portions are fixed to each other, the elastic movable wall is elastically deformed and displaced toward the outer peripheral side as the pressure projection and the split core come into contact with each other.

At this time, the amount of protrusion of the stopper to the outer peripheral side increases. Therefore, when the two accommodating portions are not fixed to each other, the amount of protrusion of the stopper can be reduced to prevent some object from being caught by the stopper. Further, when the two accommodating portions are fixed to each other, the amount of protrusion of the stopper can be increased to improve the effect of suppressing the binding band from shifting.

Further, in the noise suppression member of the present disclosure, the accommodating portion is provided with two elastic movable walls at intervals in the axial direction of the peripheral wall portion, and is provided between one elastic movable wall and the other elastic movable wall. May have a winding area around which the binding band can be wound.
According to the noise suppression member configured in this way, if the binding band is wound in the winding region, stoppers are present on both sides of the binding band. Therefore, the effect of suppressing the displacement of the binding band can be enhanced as compared with the case where the stopper exists on only one of the two sides sandwiching the region around which the binding band is wound.

Further, in the noise suppression member of the present disclosure, the accommodating portion may be provided with an urging portion for urging the two divided cores in a direction of approaching each other, in addition to the elastic movable wall.
According to the noise suppression member configured in this way, both the urging portion and the elastic movable wall press the split core, so that the force for bringing the split core into close contact can be enhanced. Alternatively, if it is not necessary to excessively increase the force for bringing the split cores into close contact with each other, the urging force of the urging portion can be weakened in consideration of the increase in the urging force due to the elastic movable wall. Therefore, the urging portion can have a structure with low springiness as much as the urging force can be weakened, and the decrease in the urging force due to aged deterioration of the urging portion can be suppressed. Further, if the split core is urged by both the urging portion and the elastic movable wall, the places where the load is applied are dispersed in many places as compared with the case where the split core is urged by the urging portion alone. Therefore, it is possible to suppress a decrease in the urging force due to aged deterioration of the urging portion as compared with the case where the load is concentrated only on the urging portion.

1 ... Noise countermeasure member, 3 ... Magnetic core, 3A, 3B ... Divided core, 5 ... Case, 7A, 7B ... Accommodating part, 9A, 9B ... Hinge part, 11A, 11B ... Lock part, 13A, 13B ... Joint part, 15A, 15B ... engaging part, 17A, 17B ... peripheral wall part, 19A, 19B, 19C, 19D ... end wall part, 21A, 21B, 21C, 21D, 22A, 22B, 22C, 22D ... elastic movable wall, 23 ... Winding area, 31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H ... Locking protrusions, 32A, 32B, 32C, 32D, 32E, 32F, 32G, 32H ... Pressurized protrusions, 33A, 33B, 33C , 33D ... Stopper, 35A, 35B, 35C, 35D ... Biasing part, 37A ... Engagement groove.

Claims (5)

With a magnetic core
A case for accommodating the magnetic core is provided.
The magnetic core is formed in a tubular shape by bringing two divided cores, each of which is composed of a magnetic material, into contact with each other.
The case has two accommodating portions each accommodating the divided core and a fixing mechanism for fixing the two accommodating portions to each other, and the divided core is accommodated in each accommodating portion and the fixing mechanism is used. When the two accommodating portions are fixed to each other, the two divided cores are held in a tubular state.
The accommodating portion has a peripheral wall portion arranged at a position along the outer periphery of the magnetic core.
A part of the peripheral wall portion has a fixed end at one end and a free end at the other end, and the free end is elastically movable so as to be elastically deformed between both ends with respect to the fixed end. As a wall,
At a position on the inner peripheral side of the elastic movable wall and on the free end side of the center between both ends of the elastic movable wall, a locking projection protruding toward the radial inner peripheral side of the peripheral wall portion is provided.
At a position on the inner peripheral side of the elastic movable wall and at a position closer to the fixed end side than the center between both ends of the elastic movable wall, a pressure projection projecting toward the radial inner peripheral side of the peripheral wall portion is provided.
When the two accommodating portions are not fixed to each other, the locking projection is hooked on the split core, so that the split core can be prevented from being detached from the accommodating portion.
When the two accommodating portions are fixed to each other, the elastic movable wall is elastically deformed as the pressure projection and the split core come into contact with each other, so that the elastic movable wall becomes the elastic movable wall. A noise suppression member configured to urge the two split cores to approach each other. The noise suppression member according to claim 1.
The locking projection and the pressure projection are noise countermeasure members provided at positions where they do not overlap each other when viewed from a direction orthogonal to the axial direction of the peripheral wall portion. The noise countermeasure member according to claim 1 or 2.
On the outer peripheral side of the elastic movable wall, a stopper is provided so as to project toward the radial outer peripheral side of the peripheral wall portion.
A noise suppression member configured by the stopper to prevent the binding band from shifting in the axial direction along the outer circumference of the case when the binding band is wound around the outer circumference of the case. The noise suppression member according to claim 3.
The accommodating portion is provided with two elastic movable walls at intervals in the axial direction of the peripheral wall portion, and the binding band is provided between one elastic movable wall and the other elastic movable wall. A noise suppression member that has a winding area that can be wound around. The noise countermeasure member according to any one of claims 1 to 4.
A noise countermeasure member provided with an urging portion for urging the two divided cores in a direction of approaching each other, in addition to the elastic movable wall.

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