JP5950208B2 - Joint connector with built-in noise filter - Google Patents

Description

  The present invention relates to a joint connector with a built-in noise filter.

  Conventionally, a noise filter built-in connector in which an insulating substrate on which a noise filter circuit is formed is arranged in a housing is known. The terminal fitting penetrates the insulating substrate and is electrically connected to the noise filter circuit in the housing process in the housing. Along with this, the noise current superimposed on the terminal fitting is removed (see, for example, Patent Document 1).

JP 11-329609 A

  However, while there is a demand to increase the noise removal capability of the noise filter circuit by increasing the mounting density of noise removing elements (capacitors, magnetic bodies, etc.), it is difficult to avoid the enlargement of the connector due to an increase in mounting density.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a joint connector with a built-in noise filter that is small in size and has a high noise removal capability.

The joint connector with built-in noise filter of the present invention is
A noise filter joint connector that mates with the mating connector,
Terminal fittings,
A connector housing having a housing chamber formed at the rear;
An insulating substrate on which a noise removal circuit is formed by placing the capacitor in a state of being protruded with a predetermined height, which is disposed in the storage chamber;
The insulating substrate is provided with a ring-shaped magnetic body that can be penetrated by the terminal fitting and is less than or equal to the installation height of the capacitor,
The terminal fitting penetrates the noise removal circuit and the magnetic body and is accommodated in the connector housing.

  According to the present invention, a circuit for removing noise formed by installing a capacitor on an insulating substrate and a ring-shaped magnetic body that is also installed on the insulating substrate are penetrated by a terminal metal fitting to simulate. An LC noise filter can be provided in the connector housing. As a result, the noise component in the higher band can be removed by the capacitance component of the capacitor and the inductance component of the magnetic material, and the noise removal capability of the joint connector with a built-in noise filter can be enhanced. Moreover, since the magnetic body is stored below the capacitor installation height and installed on the insulating substrate, the amount of protrusion to the rear of the storage chamber for storing them is reduced, and the enlargement of the connector can be suppressed.

Side sectional view of the joint connector with built-in noise filter according to the first embodiment. Rear view showing part of a joint connector with a built-in noise filter The figure which similarly shows a pseudo LC noise filter circuit

  A preferred embodiment of the present invention will be described.

The joint connector with built-in noise filter of the present invention is
It is preferable that a slit for connecting the noise removing circuit and the terminal fitting is provided at a position coaxial with the through hole of the magnetic body on the noise removing circuit.
According to this configuration, the terminal fitting can penetrate the slit provided on the noise removal circuit in a state in which the terminal fitting passes through the through hole of the magnetic body and is positioned. Therefore, the connection work between the terminal fitting and the noise removal circuit is facilitated.

Next, Example 1 that embodies the joint connector with built-in noise filter of the present invention will be described with reference to the drawings.
<Example 1>
The joint connector 10 with built-in noise filter of the present embodiment (hereinafter simply referred to as the connector 10) includes a plastic connector housing 11, an insulating sheet (insulating substrate) 21 on which a noise removing circuit 27 is formed, and an electric wire 42. Has a bus bar terminal (terminal fitting) 41 attached to the rear end. In the following description, in the front-rear direction, the right side in FIG. 1 is the front side and the left side is the rear side.

  As shown in FIG. 1, the connector housing 11 partitions the hood portion 12 that can be fitted with a mating connector (not shown), the storage chamber 16 that can store the insulating sheet 21, and the hood portion 12 and the storage chamber 16. It is composed of a partition wall 17. In the partition wall 17, three terminal insertion openings 18 are opened side by side in the width direction so that the bus bar terminal 41 can penetrate from the accommodation chamber 16 side.

  The hood portion 12 is formed in a rectangular tube shape on the front side of the connector housing 11 and opens forward.

  The accommodation chamber 16 is formed in a rectangular tube shape on the rear side of the connector housing 11 and opens rearward. As shown in FIG. 1, the accommodation chamber 16 accommodates an insulating sheet 21 arranged such that the surface on which the noise removal circuit 27 is formed faces rearward.

  The insulating sheet 21 is made of a flexible film having elasticity and flexibility, such as polyimide, and a copper foil pattern 23 and an insulating film 24 such as an epoxy resin are sequentially laminated. Further, a magnetic ring 19 (magnetic material) is formed on the insulating film 24. It is the composition which arranged. FIG. 2 shows a rear view of the connector 10 with the insulating coating 24 removed. As shown in FIG. 2, the noise removing circuit 27 is composed of a ceramic capacitor (capacitor) 25 fixed to an insulating sheet 21 and a copper foil pattern 23. The ceramic capacitor 25 and the copper foil pattern 23 are soldered ( It is electrically connected by a solder part 28). Further, the copper foil pattern 23 is connected to a ground part (not shown).

  Further, as shown in FIG. 2, the connection region for electrically connecting the bus bar terminal 41 and the noise removal circuit 27 has an H-shape on the copper foil pattern 23 corresponding to the insertion position of the bus bar terminal 41. The slit 26 is formed by cutting the slit 26. Note that the insulating coating 24 is not provided on the connection region. In addition, as shown in FIG. 2, a magnetic ring 19 protrudes around the connection region, and the connection region and the opening 19 </ b> H of the magnetic ring 19 are positioned so as to overlap in the rear view.

  The magnetic ring 19 is composed of a ferrite having a rectangular ring shape and a resin coating (not shown) covering the entire surface. Then, as shown in FIG. 2, the magnetic ring 19 is fixed on the insulating coating 24 by an adhesive means while staying below the installation height of the ceramic capacitor 25 fixed to the insulating sheet 21.

  The bus bar terminal 41 is formed in a tab shape with a sharp tip, and has a barrel portion (not shown) at the rear end portion, and is connected to the electric wire core by caulking. In this embodiment, the caulking portion 43 is molded in a cylindrical shape with resin, and the operator picks it up during the mounting operation of the bus bar terminal 41 to facilitate the pressing operation.

  Next, a procedure for inserting the bus bar terminal 41 will be described.

  When the bus bar terminal 41 is inserted into the opening 19 </ b> H of the magnetic ring 19, the end of the bus bar terminal 41 reaches the connection region on the insulating sheet 21 and penetrates the insulating sheet 21 through the slit 26. Accordingly, the copper foil pattern 23 of the noise removal circuit 27 and the tip of the bus bar terminal 41 are in sliding contact with each other, whereby the bus bar terminal 41 and the noise removal circuit 27 are electrically connected. Thereafter, when the bus bar terminal 41 is further inserted, the front end of the bus bar terminal 41 penetrates through the terminal insertion port 18 formed in the partition wall 17 and is accommodated in the hood portion 12 (the bus bar accommodated in the hood portion 12). Terminal 41 is electrically connected when mated with the mating connector). As shown in FIG. 2, the insertion of the bus bar terminal 41 is completed when the front end of the caulking portion 43 comes into contact with the magnetic ring 19.

  Next, the noise removal action of the connector 10 in this embodiment will be described.

  Since the bus bar terminal 41 penetrates the magnetic ring 19, the pseudo inductance component L of the bus bar terminal 41 and the magnetic ring 19 is connected in series. After that, the bus bar terminal 41 passes through the noise removal circuit 27 including the ceramic capacitor 25, so that the bus bar terminal 41 and the capacitance component C of the ceramic capacitor 25 are connected in parallel. That is, the signal current on which the noise flowing in the bus bar terminal 41 is superimposed passes through a pseudo LC noise filter as shown in FIG. Then, only the noise component is removed to the ground portion via the ceramic capacitor 25, and only a clear signal current is obtained from the tip of the bus bar terminal 41 accommodated on the hood portion 12 side.

  Next, effects of the first embodiment will be described.

  According to the present embodiment, a pseudo LC filter circuit is configured by installing the noise removing circuit 27 connected to the ceramic capacitor 25 and the magnetic ring 19 that can be penetrated by the bus bar terminal 41 on the insulating sheet 21. And can be mounted on the connector 10. As a result, the connector 10 having a higher bandwidth and a higher noise removal function can be obtained as compared with the conventional noise filter circuit having only a capacitor.

  In addition, since the magnetic ring 19 is placed on the insulating sheet 21 so as to be below the installation height of the ceramic capacitor 25, the amount of protrusion of the housing chamber 16 for housing them can be reduced, and the connector 10 is enlarged. Can be suppressed.

  In addition, a slit 26 is provided in the region on the noise removal circuit 27 that is coaxial with the opening 19 </ b> H of the magnetic ring 19 in order to connect to the bus bar terminal 41. Therefore, the bus bar terminal 41 can pass through the slit 26 in a state where the bus bar terminal 41 is positioned in advance in the opening 19H of the magnetic ring 19, so that the mounting work is facilitated.

  Further, since the noise removal circuit 27 can be connected at a position close to the tip of the terminal fitting 41, it is possible to prevent noise from being superimposed again in the process of current flowing from the connection region to the tip of the terminal fitting 41.

  As described above, according to the present invention, it is possible to provide a small joint connector 10 with a built-in noise filter that has a high noise removal function and suppresses enlargement.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, a ceramic capacitor is used as the capacitor. However, the capacitance of the capacitor may be changed or other types of capacitors may be used according to the frequency band of noise to be removed.
(2) In the above embodiment, the magnetic ring is used as the magnetic body. However, the size and material of the magnetic ring may be changed according to the frequency band of noise to be removed.
(3) In the above embodiment, the magnetic ring is a rectangular ring, but it may be a circular or elliptical ring.
(4) In the above embodiment, the copper foil pattern is used for the noise removing circuit, but other metal foil patterns such as gold, silver, and nickel alloy may be used.
(5) In the above embodiment, polyimide is used as the insulating substrate, but another flexible film or a hard substrate may be used.
(6) In the above embodiment, the bus bar terminal is used as the terminal fitting, but a male terminal fitting other than the female terminal fitting or the bus bar terminal may be used.
(7) In the above embodiment, the bus bar is formed of a copper alloy, but other metals may be used.
(8) In the above-described embodiment, the single insulating substrate on which the noise removing circuit is formed is configured. However, a plurality of insulating substrates may be stacked.

10 ... Connector (joint connector with built-in noise filter)
DESCRIPTION OF SYMBOLS 11 ... Connector housing 16 ... Storage chamber 19 ... Magnetic body ring (magnetic body)
19H ... Opening (through hole)
21 ... Insulating sheet (insulating substrate)
25 ... Ceramic capacitor (capacitor)
26 ... Slit 27 ... Noise removal circuit 41 ... Bus bar terminal (bus bar, terminal fitting)

Claims (2)

A noise filter joint connector that mates with the mating connector,
Terminal fittings,
A connector housing having a housing chamber formed at the rear;
An insulating substrate on which a noise removal circuit is formed by placing the capacitor in a state of being protruded with a predetermined height, which is disposed in the storage chamber;
The insulating substrate is provided with a ring-shaped magnetic body that can be penetrated by the terminal fitting and is less than or equal to the installation height of the capacitor,
A joint connector with a built-in noise filter, wherein the terminal fitting passes through the noise removal circuit and the magnetic body and is accommodated in the connector housing.   The slit for connecting the said noise removal circuit and the said terminal metal fitting is provided in the position which comprises the through-hole of the said magnetic body on the said noise removal circuit, and it is characterized by the above-mentioned. The joint connector with built-in noise filter as described.

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