JPH054422U - Noise absorber - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In the noise absorber 1 in which the split cases 4a and 4b accommodating the split magnetic bodies 2a and 2b are closed and installed so as to surround the cable of the electronic device, the split magnetic bodies are provided. 2a, 2b
The deviation of the noise is prevented and a sufficient noise absorption effect is obtained. [Structure] An engaging member 10 having a convex portion on one side and a concave portion on the other side is formed at a joint portion of divided cases 4a, 4b for holding and accommodating the divided magnetic bodies 2a, 2b. , 4b, the divided magnetic bodies 2a, 2b are brought into close contact with each other at an accurate position to form an annular magnetic body (core).
1 is formed. [Effect] When the split cases 4a and 4b are closed, the fitting member 10 is fitted and positioned, so that the split case 4
Split magnetic bodies 2a, 2 due to the displacement of the locking members 7 of a, 4b
The deviation of b does not occur, so that the generation of leakage magnetic flux can be prevented and a sufficient noise absorption effect can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a noise absorber that is attached to a cable of an electronic device to absorb a noise current (noise) inside the electronic device or on a power line.

[0002]

[Prior Art]

 FIG. 4 is a perspective view of a conventional noise absorber. In the figure, 1 is a noise absorber, 2a and 2b are split magnetic bodies (cores) that constitute the noise absorber 1, and an annular magnetic body is divided in a diameter direction. It has divided surfaces 3a and 3b which have a closed shape and can be in close contact with each other. 4a and 4b are split cases that hold and house the split magnetic bodies 2a and 2b in predetermined positions, 5 is a connecting portion that connects the split cases 4a and 4b so that they can be opened and closed, and 6a and 6b are closed split cases 4a and 4b. When the joints 7 face each other when facing each other, a locking member is composed of a locking claw 7a provided on the split case 4a and a locking piece 7b provided on the split case 4b. The divided magnetic bodies 2a, 2b and the divided cases 4a, 4b have hole forming grooves 8a, 8b and 9a, 9b which form cable insertion holes when closed.

The above noise absorber 1 holds and stores the divided magnetic bodies 2a and 2b at predetermined positions of the divided cases 4a and 4b, and the hole forming grooves 8a of the divided magnetic bodies 2a and 2b and the divided cases 4a and 4b. , 8b and 9a, 9b, the division cases 4a, 4b are closed and the division surfaces 3a, 3b of the division magnetic bodies 2a, 2b are brought into close contact with each other so that the cable of the electronic device is arranged in the cable insertion hole. In this state, the locking member 7 including the locking claw 7a and the locking piece 7b provided on each of the divided cases 4a and 4b is locked and mounted on the cable.

In the noise absorber 1 thus mounted on the cable of the electronic device, the joint portions 6a and 6b of the divided cases 4a and 4b are joined together, and the divided magnetic bodies 2a and 2b are formed on the divided surfaces 3a and 3b. They are in close contact with each other to form an annular magnetic body. Therefore, when a noise current flows from inside the electronic device or from the power supply line into the cable of the electronic device, the noise current is absorbed by the electromagnetic characteristics of the annular magnetic body.

[0005]

[Problems to be solved by the device]

 Since the conventional noise absorber 1 is configured as described above, when the locking member 7 is displaced, the divided surfaces 3a and 3b of the divided magnetic bodies 2a and 2b are also displaced to cause leakage magnetic flux. However, there is a problem in that the noise absorption effect becomes insufficient.

The present invention has been made in order to solve the above problems, and an object thereof is to provide a noise absorber capable of preventing the generation of leakage magnetic flux and obtaining a sufficient noise absorbing effect. To do.

[0007]

[Means for Solving the Problems]

 The noise absorber of this invention has a plurality of divided magnetic bodies each having a shape in which an annular magnetic body is divided, and each divided magnetic body is housed in a predetermined position, and when the closed magnetic body is closed, the divided surfaces of the divided magnetic bodies are separated. An openable and closable split case that tightly adheres to form an annular magnetic body around the cable, a fitting member consisting of a convex portion and a concave portion formed at the joint of the split case, and a split case that closes the mating member. And a locking member that locks each divided case in a combined state.

[0008]

[Action]

 The noise absorber of this invention absorbs the noise current flowing through the cable by being used by being attached to the cable of the electronic device. To mount the noise absorber, first, the divided magnetic body is held and housed in a predetermined position of the divided case, and the divided case is closed so that the joint portions face each other. At this time, one of the mating members formed at the joint portion is a convex portion and the other is a concave portion, so that the mating members are mated, and the split cases are assembled in a state of being positioned at a predetermined position. At the same time, the split surfaces of the split magnetic bodies held by the split cases come into close contact with each other to form an annular magnetic body surrounding the cable. In this state, the locking member is locked to fix the divided cases together.

In this way, the noise absorber attached to the cable of the electronic device absorbs the noise current entering the cable from inside the electronic device or from the power supply line by the electromagnetic characteristics of the annular magnetic body. Further, since the locking member is locked while the engaging member is engaged, the split magnetic body does not shift due to the shift of the locking member, and therefore, the leakage magnetic flux does not occur and the magnetic flux is sufficiently generated. The noise absorption effect can be obtained.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a noise absorber of the embodiment. In the figure, the same reference numerals as those in FIG. 4 indicate the same or corresponding parts. Reference numeral 10 denotes an engaging member provided on the joints 6a and 6b of the divided cases 4a and 4b. A cylindrical convex portion 10a formed on one of the joints 6a and 6b and the convex portion 10a. As described above, the joint portion 6a, 6b is provided with a hole-shaped recess 10b provided on the other side. Other configurations are the same as those in FIG.

The above noise absorber 1 is attached to a cable of an electronic device to absorb noise current. The noise absorber 1 is mounted by holding the divided magnetic bodies 2a, 2b at predetermined positions in the divided cases 4a, 4b as in the conventional case, and inserting the holes in the divided magnetic bodies 2a, 2b and the divided cases 4a, 4b. The split cases 4a, 4b are closed so that the cables are arranged in the cable insertion holes formed by the forming grooves 8a, 8b and 9a, 9b. At this time, the convex portion 10a and the concave portion 10b forming the mating member 10 of the joint portions 6a and 6b of the divided cases 4a and 4b are engaged with each other, so that the joint portions 6a and 6b are positioned and joined. At the same time, the split magnetic bodies 2a and 2b are closely attached to the split surfaces 3a and 3b at precise positions, and an annular magnetic body is formed so as to surround the cable. By locking the locking piece 7b to the locking claw 7a in this state, the split cases 4a and 4b are fixed to each other, and the mounting is completed.

In the noise absorber 1 thus mounted, the locking member 7 is locked while the engaging member 10 is engaged, so that the split surfaces 3a, 3b due to the displacement of the engaging member 7 There is no gap. Therefore, according to the noise absorber 1, the leakage magnetic flux is prevented from being generated, and a sufficient noise absorbing effect by the annular magnetic body is obtained.

FIG. 2 is a perspective view showing a noise absorber according to another embodiment, and third is a perspective view showing a noise absorber according to still another embodiment. In FIG. 2, the fitting member 10 includes a linear convex portion 10a provided on one joint portion 6a of the divided cases 4a and 4b and a groove provided on the other joint portion 6b so as to engage with the linear convex portion 10a. And a concave portion 10b. In FIG. 3, the mating member 10 includes a step-shaped convex portion 10a provided on one of the joint portions 6a and 6b and a step-shaped convex portion 10a provided on the other of the joint portions 6a and 6b so as to engage with the convex portion 10a. And a recess 10b.

In the noise absorber 1 of FIGS. 2 and 3, as in the case of FIG. 1, when the divided cases 4a and 4b are closed, the engaging member 10 engages. By locking the stopper member 7, it is possible to prevent the split surfaces 3a, 3b of the split magnetic bodies 2a, 2b from being displaced, and the annular magnetic body thus constructed can obtain a sufficient noise absorbing effect.

In the above embodiment, the divided magnetic bodies 2a and 2b, the divided cases 4a and 4b, the connecting portion 5, the locking member 7, and the engaging member 10 are not limited to those shown in the drawings, but may have other configurations. You may. It is also possible to omit the connecting portion 5 and to have a plurality of locking members 7.

[0016]

[Effect of the device]

 As described above, according to the present invention, since the engaging member having the convex portion on one side and the concave portion on the other side is provided at the joining portion of the split case for housing the split magnetic body, the split magnetic body is displaced. In this way, it is possible to make a close contact at an accurate position at all times, thereby preventing the generation of leakage magnetic flux and obtaining a sufficient noise absorption effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing a noise absorber according to an embodiment.

FIG. 2 is a perspective view showing a noise absorber according to another embodiment.

FIG. 3 is a perspective view showing a noise absorber of still another embodiment.

FIG. 4 is a perspective view of a conventional noise absorber.

[Explanation of symbols]

 1 Noise Absorber 2a, 2b Split Magnetic Body 3a, 3b Split Surface 4a, 4b Split Case 5 Connecting Part 6a, 6b Joining Part 7 Locking Member 10 Mating Member

Front Page Continuation (72) Inventor Ryohiro Isakura 1-157 Miyashita, Sagamihara City, Kanagawa Sanryo Electric Engineering Co., Ltd. Kamakura Office Sagami Branch

Claims (1)

Claims for utility model registration 1. A plurality of split magnetic bodies each having a split annular magnetic body, and the split magnetic bodies when each split magnetic body is housed in a predetermined position and closed. The split case that can be opened and closed to form a ring-shaped magnetic body around the cable by closely contacting the split surfaces of the cable, the fitting member that consists of the protrusion and the recess formed at the joint of the split case, and the split case can be closed. A noise absorber, comprising: a locking member that locks each divided case in a state where the mating member is engaged.