JP2511548Y2 - Noise absorber - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention is a split type cylindrical magnetic core.
About the noise absorbing device and a core holder with.

[0002]

2. Description of the Related Art A core holder in a noise absorbing device of this type is used in a noise absorbing device for absorbing induced noise in a signal line. Generally, this type of device is used by inserting a signal line between two divided cylindrical cores. The core holder is for clamping and holding the split type tubular core in a tubular shape, and an example of a conventional core holder is shown in FIG. 7 together with the core piece.

In FIG. 7, a core piece 1 is obtained by dividing a cylindrical magnetic core having an octagonal cross-section into two equal parts by orthogonal lines orthogonal to the sides of the octagon, and forming a square shape at each end of the bottom of the central groove 2. The engaging recess 3 is formed.

The core holder is made of an insulating resin material and has two box-shaped holder divided bodies 4 each capable of accommodating the core piece 1 with the surface having the central groove 2 exposed, and one of the opening edges is hinged. It is connected at the part 5. The side wall of the holder divided body 4 is provided with an engaging portion 6 and an engaging portion 7 which can engage with each other. A locking claw 9 is provided at a portion of the inner wall of the holder divided body 4 which is in contact with the bottom of the semicircular cutout portion 8. The interval between the engaging claws 9 facing each other is slightly larger than the interval between the two engaging recesses 3 of the core piece 1, and the degree of freedom is increased by the vertical grooves 10 formed on both sides thereof. On the inner bottom of the holder divided body 4, two cantilever springs 11 (only one is shown) are formed by partially projecting inwardly by U-shaped notches.

Here, when the core piece 1 is pressed and inserted into the holder divided body 4, the locking claw 9 is fitted and locked in the engaging concave portion 3 and the back surface contacts the cantilever spring 11. It is housed in contact. The core piece 1 projects slightly from the opening surface of the holder divided body 4 by being elastically contacted with the cantilever spring 11 and the engaging concave portion 3 being locked by the locking claw 9.

When the core piece 1 is housed in each of the holder divided bodies 4 and then the engaging portion 6 and the locking portion 7 are engaged so that the opening edges of the holder divided bodies 4 are aligned with each other, the core piece 1 is divided. The faces are brought into contact with each other, and the locking claw 9 moves away from the engagement recess 3 to further bend the cantilever spring 11. As a result, both core pieces 1 are pressed against each other and held as a tubular core.

[0007]

By the way, in the above core holder, the locking claw 9 is formed integrally with the holder divided body 4, and when the core piece 1 is accommodated by bending of the vertical groove 10, that is, the thin portion. The external force applied to the locking claw 9 of FIG.

However, only by bending the thin portion, the locking claw 9
The degree of freedom of is relatively small. For this reason, when the axial length of the core piece 1 is larger due to variations in manufacturing conditions or when a strong external force is applied to one of the locking pawls 9 when the core piece is accommodated, the locking pawl is There is a problem that 9 is missing.

Needless to say, the cantilever spring 11 must also have sufficient flexibility.

An object of the present invention is to provide a noise absorbing device having a structure which solves the problems such as the loss of the locking claws for core pieces which has been conventionally found .

[0011]

According to the present invention, a cylindrical magnet is used.
Two core pieces formed by dividing the body core into two in the cylinder axis direction ,
In a noise absorbing device having a core holder provided with two boxes each having an opening for accommodating each of the two core pieces, there is provided between each of the two core pieces and each box.
In each case, a flexible member made of a flexible material must be interposed.
The flexible member includes a leg portion that engages with the box body, a locking claw that engages with the core piece, and a pressure spring for pressing the core piece in the opening direction of the box body. And the locking
The claw extends over the end surface and the inner surface of the cylinder on the core piece.
Characterized in that it engages with the formed recess
A noise absorber is obtained.

That is, a flexible material having a pair of locking claws and a butt spring plate in a pair of box-shaped case divided bodies in which opening surfaces are butted and combined with each other by a locking portion that engages with each other. And a core piece holding frame made in the above, and a core holder in which the core piece holding frame is attached in the case divided body is obtained.

[0013]

In a core holder provided with two boxes each having an opening for accommodating the core piece of the magnetic core divided into two, the flexibility of the flexible material mounted in the box body. The locking claw of the member engages with the core piece, and the pressure spring of the flexible member presses the core piece in the opening direction of the box body. No nail loss.

Further, the pair of box-shaped case divided bodies have a function of accommodating and fixing the core piece holding frames, accommodating the core pieces, and inserting the core pieces so as to penetrate the signal lines. In the core piece holding frame, the locking claw and the butt leaf spring work together to fix the core piece, and the butt leaf spring works together with the case division body to butt and press the core piece to keep it in a tubular shape.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing this embodiment. In addition, FIG. 2, FIG. 3 and FIG.
A perspective view showing a state in which the temporary assembly is attached to the body 12,
It is a front view and an AA sectional view. In FIG. 1, the core holder has a pair of case divided bodies 12 which are box bodies having openings. Each of the case divided bodies 12 is provided with a temporary assembly in which the core piece holding frame 13 is attached to the core piece 1 made of a magnetic material. FIG. 1 shows a state in which the temporary assembly is removed from both case divided bodies 12 and one of the temporary assemblies is disassembled into the core piece holding frame 13 and the core piece 1.

Similar to the conventional holder division body 4 shown in FIG. 7 , the case division body 12 has one of its opening edges connected by a hinge portion 5. An engaging portion 6 and a locking portion 7 are provided on each of the connected case divided bodies 12. Further, in the case divided body 12, two rectangular through holes 14 (only one is shown) are formed along the long side of the inner bottom.

The fitting concave portion 1 is formed on the inclined inner wall contacting the inner bottom surface.
Four divisions 5 are formed in one divided body 12 (only one shown).

The core piece holding frame 13 is made of a flexible insulating resin material (for example, fluorine resin, silicon resin, etc.). The core piece holding frame 13 has a rectangular frame shape substantially corresponding to the inner bottom of the case divided body 12, and a prism 17 is integrally provided in the central portion of the short side portion so as to project. A locking claw 18 is formed at the tip of the prism 17. Legs 19 slightly extending outward are formed at both ends of the short side portion. A butt spring plate (pressure spring) 20 is formed on the long side portion, and is bent upward at the center.
That is, the core piece holding frame 13 is engaged with the case division body 12.
Leg 19 and elastic force when it deforms
A butt spring plate 20 that generates
Locking claw 1 for holding the core piece 1 in cooperation with the mating spring plate 20
8 and a prism extending between the center of the short side of the frame and the locking claw 18.
17 and 17 are integrated. The locking claw 18 is a core
Engagement formed on the piece 1 over the end surface and the inner surface of the cylinder
The engaging recess 3 is engaged. The locking claw 18 is a core piece
Dimension with a slight margin for the width of the engaging recess 3
It is. Also, as is clear from FIG. 4, the pair of
The distance between the inner ends of the locking claws 18 and the pair of pairs of prisms 17
The facing distances are respectively the portions of the core piece 1 corresponding to them.
Larger than the length dimension. That is, the locking of the core piece holding frame 13
There is a gap between the claw 18, the prism 17 and the core piece 1.

In the temporary assembly, the engaging recess 3 of the core piece 1
The locking claw 18 of the core piece holding frame 13 is engaged with the.
2 to 4 by inserting the leg 19 into the fitting recess 15 of the case division body 12 from above and pushing it under the small roof 16 .
As described above, the temporary assembly can be attached to the case division body 12.

In FIG. 3, the butt spring plate 20 is elastically contacted with the back surface (bottom surface) of the core piece 1 and a part of the butt spring plate 20 is loosely fitted in the through hole 14, and the engaging recessed portion 3 has a locking claw 18 (shown in FIG. 3). The core piece 1 slightly protrudes from the opening edge of the case division body 12.

Thus, the noise absorber is manufactured by accommodating the temporary assembly in the case divided body 12. This noise
In the absorber, the core piece 1 and the core piece holding frame 13 are interposed.
In the state where the core piece 1 is housed in the case division body 12,
As shown in FIGS. 2 to 4, the part including the dividing surface is
In the state that it slightly protrudes from the opening edge of the space division body 12.
It At this time, the butt spring plate 20 has the core piece 1
Displaces from the protruding state into the case divided body 12.
It is elastically deformable in a direction that allows this
Elastically deforms even when the core piece 1 is accommodated.
Between the butt spring plate 20 and the inner bottom surface of the case division body 12
Is formed on the inner bottom surface of the case division body 12.
To avoid the butt spring plate 20 with the deformed through hole 14
To function and to deform the butt spring plate 20.
The locking claw 18 and the prism 17 and the core piece 1 which are displaced together
This is because there is a gap as described above between and.

In FIG. 5, the engaging portions 6 and the engaging portions 7 of the case divided body 12 are engaged with each other to bring the core pieces 1 into contact with each other and the butt spring plate 2 into contact.
The state of being held in a tubular shape by the pressing action of 0 is shown. Two
When the case divided bodies 12 are assembled to each other, each core is
The piece 1 is directed into the case division 12 from its protruding state.
Butt that is displaced once and then deformed by this displacement
The spring plates 20 allow the split surfaces to face each other.
Is pressurized to. In this embodiment, two case divisions
The core piece 1 is divided into cases when the 12 pieces are assembled together.
Displaces towards the inside of the body 12
The deformation of the spring plate 20 causes the core piece holding frame 13 to
(A) The state of being housed in the case division body 12 together with the piece 1
Because the butt spring plate 20 is still deformable
It is. This is the assembly of two case divisions 12.
Compare Fig. 3 showing before mounting and Fig. 5 showing after assembling.
Even if it is clear. That is, if the core piece 1 and the butt
The position of the bed 20 with respect to the case division 12 is as shown in FIG.
The state before mounting is different from the state after mounting in Fig. 5.
Is changing (changing).

FIG. 6 is a diagram showing an actual usage state of the noise absorbing device. In FIG. 5, reference numeral 50 is a signal line that attempts to absorb induced noise.

As explained above, the core piece holding frame 13 is flexible and returns to its original shape even if it is bent, and if the external force is removed,
The locking piece 18 and the leg 19 are not damaged.

[0026]

[Effects of the Invention] The noise absorbing device according to the present invention comprises two cores.
A flexible member made of a flexible material is interposed between each piece and each box, and the flexible member is connected to the box.
Includes a leg portion that case, the locking claw that engages the core pieces, and a pressure spring for pressing the core pieces in the opening direction of the box, the locking
The claws are formed on the core piece over the end surface and the inside surface of the cylinder.
Since it engages with the formed recess, the locking claw is not damaged when the core piece is housed.

Further, since the locking claw and the pressure spring are integrally formed as a holding frame, the case divided body itself can have a simple shape without a flexible member. Therefore, the mold of the case division body can be manufactured relatively easily and inexpensively.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a noise absorbing device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a noise absorbing device according to an embodiment of the present invention.

3 is a cross-sectional view of the noise absorbing device shown in FIG.

4 is a cross-sectional view of the noise absorbing device shown in FIG.

5 is a cross-sectional view showing a state in which the core holder shown in FIG. 2 is held in a tubular shape.

FIG. 6 is a perspective view showing an actual usage state of the noise absorbing device.

FIG. 7 is an exploded perspective view showing a conventional noise absorbing device .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core piece 3 Engagement recessed part 5 Hinge part 6 Engagement part 7 Engagement part 7 Engagement part 9, 18 Engagement claw 10 Vertical groove 11 Cantilever spring 12 Case division body 13 Core piece holding frame 14 Through hole 15 Fitting recessed part 19 Leg 20 Butt spring plate 50 Signal line

Claims (1)

(57) [Scope of utility model registration request] 1. A cylindrical magnetic core is formed on a split surface including a cylinder axis.
With two core pieces, each with an opening
2 boxes with 2 cores each
Yes, the two boxes can be assembled with their openings facing each other.
In a noise absorber having a core holder that is capable of
A flexible member made of a flexible material is interposed between each of the two core pieces and each box body, and the flexible member includes a leg portion that engages with the box body, When it transforms itself
A pressure spring that generates a pressing force by elasticity and the core piece
To hold the core piece in cooperation with the pressure spring
The locking claw is integrally provided, and the locking claw of the flexible member engages with a recess formed in the end piece and the inner side surface of the cylinder of the core piece. sex
In the state of being housed in the box body with a member interposed, the core
In the piece, the part including the dividing surface projects more than the opening edge of the box body.
The pressure spring of the flexible member is
(A) The piece is displaced from the protruding state toward the inside of the box
Elastically deformable in a direction that allows
In the state where the two boxes are assembled to each other,
From the protruding state, the core piece goes into the box body.
The flexibility that is displaced and deformed by this displacement
The pressure spring of the member makes the divided surfaces abut each other.
A noise absorbing device characterized in that they are mutually pressurized .