JPH05234761A - Signal discriminator - Google Patents

Abstract

PURPOSE:To acquire a compact signal discriminator with less cross talk which can position and contain a plurality of magnetic beads very easily in a synthetic resin case. CONSTITUTION:A positioning structure A which positions and contains a plurality of magnetic beads 1 is formed inside a synthetic resin case 3A and each of a plurality of magnetic beads 1 is positioned and contained by the positioning structure A. Thereby, it is possible to provide a compact and high quality signal discriminator with less cross talk at a low cost by high producibility.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal discriminator that houses a so-called magnetic bead, which is a minute magnetic element for noise suppression used in electronic equipment.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view of an example of a signal discriminator that has been generally commercialized in the past. In FIG. 7, 1 is a magnetic bead that suppresses noise, 1 a is a hole that penetrates the magnetic bead at two locations, 2 is a lead member that is formed of a lead frame material or the like, and has one end connected to it.
It is inserted in the hole 1a of the place. Reference numeral 3 denotes a synthetic resin mold (hereinafter referred to as a mold) in which three magnetic beads 1 are laterally positioned and insert-molded, and the two lead members 2 of each magnetic bead 1 are aligned and are separated from the mold 3. It is protruding. Reference numeral 10 is a signal discriminator.

In the above structure, the signal discriminator 10 electrically acts as a passive element having an equivalent circuit shown in FIG.
Suppresses noise.

At this time, three magnetic beads 1 are enclosed in a mold 3 in order to increase the degree of integration of the circuit. When the magnetic beads 1 come into contact with each other, leakage flux causes crosstalk between the circuits. Therefore, it is necessary to maintain non-contact.

[0005]

Since the conventional signal discriminator is constructed as described above, a plurality of magnetic beads 1 are used.
Since the lead members 2 of each magnetic bead 1 projected during molding are inserted into the clamp grooves provided in the molding die, the thin lead members 2 are held on one side. Therefore, there are problems that it is extremely difficult to position the insert and that the resin is easily displaced by the flow of resin during molding.

The present invention has been made in order to solve the problems of the conventional example as described above, and it is extremely easy and reliable to insert a plurality of magnetic beads into a preformed synthetic resin case. An object of the present invention is to provide a signal discriminator that can be formed by positioning and storing magnetic beads with respect to each other.

[0007]

Therefore, the signal discriminator according to the present invention has a positioning structure for positioning and accommodating a plurality of so-called magnetic beads, which are minute magnetic elements for suppressing noise, inside a synthetic resin case. With this positioning structure, a plurality of the magnetic beads are positioned and housed in the synthetic resin case respectively, and a concave portion or a convex portion is provided on the surface of the magnetic bead, and a plurality of positioning portions are fitted to the concave portion or the convex portion. A plurality of magnetic beads are positioned and stored in a synthetic resin case having a structure,
A synthetic resin case for positioning and storing the magnetic beads is provided with a locking structure for preventing the stored magnetic beads from falling off, and the synthetic resin case is molded with a synthetic resin material containing magnetic powder. Bending the exposed end portion of the lead member that is formed by the lead frame material that is inserted through the plurality of through holes of the magnetic beads to reduce the mounting height of the component, The magnetic beads whose exposed end portions are bent are housed in a synthetic resin case to achieve the above object.

[0008]

In the signal discriminator according to the present invention having the above-mentioned structure, a plurality of magnetic beads are positioned with respect to each other only by inserting the magnetic beads according to the positioning structure formed in the synthetic resin case. Then, the signal discriminator is formed by being housed in a synthetic resin case.

Further, a plurality of magnetic beads can be reliably positioned by simply inserting the concave portions or the convex portions provided on the surface of the magnetic beads into the positioning structure formed on the synthetic resin case, It is stored in a synthetic resin case.

Further, by locking the magnetic beads inserted in the locking structure formed in the synthetic resin case, a plurality of magnetic beads are positioned relative to each other and locked in the synthetic resin case. Thus, the stored magnetic beads are completely prevented from falling off.

Furthermore, by molding the synthetic resin case with a resin material containing magnetic powder, the noise prevention effect can be further enhanced.

In addition to this, the mounting height of the signal discriminator is reduced by bending the exposed end portion of the lead member, which is inserted into the magnetic bead to be housed, and connecting it to the end face of the magnetic bead. It

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (Structure) FIG. 1 is a perspective view of a signal discriminator according to a first embodiment of the present invention, and FIG. 2 is a partially exploded perspective view thereof. In addition,
The same or corresponding parts as in the conventional example are represented by the same reference numerals.

In FIGS. 1 and 2, reference numeral 3A is a case made of synthetic resin (hereinafter referred to as a case), which is an example of a positioning structure A for positioning a minute magnetic element for suppressing noise, so-called magnetic beads 1, at the time of insertion. Two sets of protrusions 3a are formed so as to face each other on the upper and lower surfaces. 10A is a signal discriminator.

(Operation) An operation will be described based on the above configuration. In FIG. 2, first, the magnetic beads 1 are inserted between one inner surface of the case 3A and the upper and lower protrusions 3a, 3a.
At this time, the protrusions 3a, 3a serve as guides for the magnetic beads 1.
Is positioned and can be stored in the case 3A very easily.

Next, another magnetic bead 1 is inserted between the two sets of protrusions 3a, 3a, and then another magnetic bead 1 is inserted between the protrusions 3a, 3a and the other inner surface of the case 3A. By doing so, the three magnetic beads are extremely easily and reliably positioned with respect to each other and housed in the case 3A to form the signal discriminator 10A.

As a result, the magnetic beads 1 are reliably positioned and housed and held in the case 3A, so that the magnetic beads 1 can be completely prevented from contacting each other.

Since the case 3A can be molded with high precision in advance by injection molding, the positioning accuracy of the magnetic beads 1 is extremely high, and it is possible to store and hold the magnetic beads 1 at a high density. The signal discriminator can be mass-produced with high efficiency. In this case, automatic charging and assembling can be easily performed, so that extremely high productivity can be realized and a significant cost reduction can be realized.

Next, FIG. 3 shows a partially exploded perspective view of the signal discriminator of the second embodiment. The same or corresponding parts as in the first embodiment are designated by the same reference numerals.

In FIG. 3, reference numeral 1b is a semicircular groove 3b which is an example of a recess formed on the upper and lower surfaces of the magnetic beads 1A.
Is a semicircular ridge that forms a positioning structure A that fits into the groove 1a and positions and stores the magnetic beads 1A in a synthetic resin case (hereinafter referred to as a case) 3B. According to the number of 1A, they are formed to face the upper and lower surfaces of the case. 10B is a signal discriminator.

In the above structure, the magnetic beads 1 are formed by fitting the ridges 3b of the case 3b into the concave grooves 1b of the magnetic beads 1A.
By inserting A, a plurality of magnetic beads 1A can be accurately positioned and housed in the case 3B, and a signal discriminator can be formed very easily.

Further, FIG. 4 shows a side sectional view and a partial perspective view of a synthetic resin case of the signal discriminator of the third embodiment.
The same or corresponding parts as in the first embodiment are designated by the same reference numerals. In FIG. 4, reference numeral 3C denotes a synthetic resin case (hereinafter referred to as a case), which is an example of a hook structure B that prevents the inserted magnetic beads from falling off at the upper and lower front edges of the magnetic bead insertion portion of the case 3C. A protruding piece (referred to as a protruding piece) 3d is formed.

In the above construction, when the magnetic beads are pushed into the case 3C by aligning the insertion positions of the magnetic beads by the positioning protrusions 3a of the case 3C, the projecting pieces 3d are pushed up and down by the elasticity of the case 3C, and the magnetism is increased. The beads are positioned and stored in the case 3C. When the magnetic beads are completely inserted, the hook-shaped portions of the projecting pieces 3d return to engage with the end faces of the magnetic beads, and the magnetic beads are locked to the case 3C at the same time as the positioning. Can be completely prevented from falling off.

In this embodiment, the case of application to the first embodiment has been described, but it goes without saying that it can also be applied to the second embodiment. Further, in the above-mentioned first to third embodiments, the case where the positioning structure and the locking structure are formed so as to face the upper and lower inner surfaces of the synthetic resin case has been described, but the present invention is not limited to this, and either one of the surfaces is formed. It goes without saying that the same effect can be obtained even with the structure formed in the above.

Further, in any of the above embodiments, the noise suppressing effect can be further enhanced by using the resin material containing the magnetic powder in the synthetic resin case.

Next, FIG. 5 shows a perspective view of the magnetic beads used in the fourth embodiment. In this embodiment, the continuous exposed end 2a of the lead member 2 of the magnetic bead 1 of FIG.
By reducing the height of the lead member 2A as shown in, the magnetic beads 1A having a low mounting height are formed. As a result, the size of the housing of the magnetic beads 1A alone or the magnetic beads 1A of the synthetic resin case is reduced, and the mounting height of the signal discriminator formed by housing the magnetic beads 1A alone or in the resin case is reduced. Is something that can be done.

Next, FIG. 6 shows a partial perspective view of a signal discriminator of the fifth embodiment and a partial exploded perspective view thereof. In FIG. 6, reference numeral 3D is a synthetic resin case, and the positioning structure of the magnetic beads is similar to that of the first embodiment, but the lead member 2B is made linear with one hole of the magnetic beads 1B, and the case 3D is formed. A hole (not shown) for inserting the lead member 2B is provided on the inner back surface. Therefore, the magnetic beads 1
The lead member 2B of B projects from the front surface and the rear surface of the case 3D and is aligned and held.

[0028]

As described above, according to the present invention, a positioning structure for positioning the insertion of the magnetic beads is formed inside the synthetic resin case containing a plurality of magnetic beads, and the magnetic beads are housed again. Since a locking structure that prevents the magnetic beads from falling out is provided, a plurality of magnetic beads can be positioned with high accuracy and stored in a synthetic resin case very easily. A talk-free integrated signal discriminator can be provided.

In addition to this, by molding the synthetic resin case with a synthetic resin material containing magnetic powder, it is possible to obtain a high-quality signal discriminator having an extremely excellent noise suppressing effect.

Further, by bending the connecting end portion of the lead member of the magnetic beads to be inserted, the mounting height can be reduced, thereby reducing the size and further increasing the mounting density.

In any case, the assembling efficiency is high,
Further, since automatic charging can be applied, a high-quality signal discriminator can be provided at an extremely low price.

[Brief description of drawings]

FIG. 1 is a perspective view of a signal discriminator showing a first embodiment of the present invention.

FIG. 2 is a partially exploded perspective view of the signal discriminator of the first embodiment.

FIG. 3 is a partially exploded perspective view of a signal discriminator according to a second embodiment.

FIG. 4 is a side sectional view and a partial perspective view of a synthetic resin case of a signal discriminator according to a third embodiment.

FIG. 5 is a perspective view showing the configuration of magnetic beads of a signal discriminator according to a fourth embodiment.

6A and 6B are a partial perspective view and a partially exploded perspective view of a signal discriminator according to a fifth embodiment.

FIG. 7 is a perspective view of a conventional signal discriminator.

FIG. 8 is an equivalent circuit diagram of magnetic beads of a signal discriminator.

[Explanation of symbols]

 1, 1A, 1B Magnetic beads (micro magnetic element) 2, 2A, 2B Lead member 3A, 3B, 3C, 3D Synthetic resin case A Positioning structure B Locking structure In the drawings, the same reference numerals indicate the same or corresponding parts. Show.

Claims (6)

[Claims] 1. A positioning structure for positioning and accommodating a plurality of small magnetic elements for suppressing noise, so-called magnetic beads, is formed inside a synthetic resin case, and a plurality of the magnetic beads are respectively provided by the positioning structure. A board-mounted signal discriminator characterized by being positioned and stored in a synthetic resin case. 2. A plurality of the magnetic beads are positioned and housed in a synthetic resin case in which a concave portion or a convex portion is provided on the surface of the magnetic bead, and a plurality of positioning structures that fit with the concave portions or the convex portions are formed. A board-mounted signal discriminator characterized in that 3. The substrate mounting type according to claim 1, wherein a synthetic resin case for positioning and storing the magnetic beads is provided with a locking structure for preventing the stored magnetic beads from falling off. Signal discriminator. 4. The board-mounted signal discriminator according to claim 1, wherein the synthetic resin case is formed of a synthetic resin material containing magnetic powder. 5. A component mounting height is reduced by bending an exposed end portion of a lead member formed of a lead frame material which is inserted through a plurality of through-holes of a magnetic bead and which is continuous. Board mounted signal discriminator. 6. The board-mounted signal discriminator according to claim 1, wherein the magnetic beads according to claim 5 are housed.