JP2014216094A - Ferrite core built-in connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a ferrite core built-in connector.SOLUTION: A ferrite core built-in connector 10 comprises: a terminal metal fitting 20; annular ferrite cores 30A and 30B; and a connector housing 11 housing the terminal metal fitting 20 and the ferrite cores 30A and 30B and fitting a partner side connector. A terminal metal fitting 20 comprises: a plurality of tab terminal parts 22A and 22B extending in a fitting direction and that serve as input-output parts; and a base 23 to which the tab terminal parts 22A and 22B are coupled. At least one or more ferrite cores 30A and 30B are engaged with the plurality of tab terminal parts 22A and 22B. The ferrite cores 30A and 30B adjacent in an arrangement direction of the tab terminal parts 22A and 22B are arranged while being shifted backward and forward with respect to the fitting direction, and arranged so as to be lapped over with respect to the arrangement direction of the tab terminal parts 22A and 22B.

Description

  The present invention relates to a ferrite core built-in connector.

  Some of the joint connectors are bus bar terminals that protrude in the mating direction in order to remove noise currents that adversely affect signal transmission by controlling electronic components mounted on automobiles through CAN (Control Area Network) communications. There is known a structure in which an annular ferrite core is fitted (see Patent Document 1 below).

JP 2013-25917 A

  By the way, the joint connector has a strong demand for miniaturization, and it is desired to shorten the distance between terminals as much as possible. However, in the joint connector shown in FIG. 6 of Patent Document 1, since the ferrite cores are aligned in the fitting direction with respect to the bus bar terminals, the distance between the terminals must be restricted by the ferrite core. There wasn't.

  The present invention has been completed based on the above circumstances, and an object thereof is to provide a ferrite core built-in connector that is miniaturized by reducing the distance between terminals.

The ferrite core built-in connector of the present invention is
Terminal fittings,
An annular ferrite core;
A ferrite core built-in connector comprising a connector housing that accommodates the terminal fitting and the ferrite core and is fitted to a mating connector,
The terminal fitting includes a plurality of tab terminal portions that extend in the fitting direction and serve as input / output portions, and a base portion that connects the tab terminal portions,
At least one ferrite core is fitted in the plurality of tab terminal portions,
The ferrite cores adjacent to each other in the direction in which the tab terminal portions are arranged are arranged so as to be shifted back and forth with respect to the fitting direction, and are arranged so as to wrap in the direction in which the tab terminal portions are arranged. To do.

  According to the present invention, the ferrite core is fitted in the tab terminal portion of the terminal fitting, and the ferrite core adjacent in the direction in which the tab terminal portions are arranged is arranged shifted in the front-rear direction with respect to the fitting direction. The tab terminal portions are arranged so as to wrap in the arrangement direction. Therefore, since the distance between the tab terminal portions can be shortened (narrow pitch) by the wrap length, the ferrite core built-in connector can be miniaturized.

Front view of the circuit unit according to the first embodiment. Similarly, a cross-sectional view of the circuit unit Similarly, a cross-sectional view of a ferrite core built-in connector Similarly, a cross-sectional side view of a ferrite core built-in connector Plan sectional view of the ferrite core built-in connector according to Embodiment 2

  A preferred embodiment of the present invention will be described.

The ferrite core built-in connector of the present invention is
The ferrite cores fitted in the tab terminal part serving as the input part and the other ferrite cores fitted into the tab terminal part serving as the output part have a frequency band of removable noise components. It is preferable to have a different configuration.
According to this configuration, in the conduction path from the input unit to the output unit, the noise removal characteristics of the ferrite core built-in connector are improved because the ferrite cores having different frequency bands of noise components that can be removed are passed.

  Next, Embodiments 1 and 2 embodying the ferrite core built-in connector of the present invention will be described with reference to the drawings.

<Example 1>
A ferrite core built-in connector 10 (hereinafter simply referred to as a connector 10) of the present embodiment includes a bus bar terminal (terminal fitting) 20, noise removing ferrite cores 30A and 30B, and a connector housing 11. ing. In the following description, in the front-rear direction, the right side in FIG. 3 is the front side and the left side is the rear side.

  The connector housing 11 is made of synthetic resin, and as shown in FIG. 3, the connector housing 11 is provided with a rectangular tube-shaped hood portion 12 having an opening portion 11H on the front, and the circuit unit 40 is inserted into the hood portion 12 by insert molding. Integrated into one. The circuit unit 40 includes a bus bar terminal 20 and ferrite cores 30A and 30B.

  The bus bar terminal 20 is formed by punching a metal conductive plate material such as a copper alloy and bending it. From the eight tab terminal portions 22A and 22B having a tab shape and a base portion 23 connecting them. Become. As shown in FIG. 1, the four tab terminal portions 22A located in the upper stage are positive electrode side terminals (input parts) 22A, and the four tab terminal parts 22B located in the lower stage are negative electrode side terminals (output parts) 22B. It is. As shown in FIG. 2, the tab terminal portions 22A and 22B extend from the base portion 23 at equal intervals in the longitudinal direction. The interval L between the tab terminal portions 22A and 22B is a ferrite core 30A described later. , 30B is set to be smaller than twice the radius R (L <2R). The eight tab terminal portions 22A and 22B are both electrically connected to a female terminal fitting of a mating connector (not shown).

  The ferrite cores 30A and 30B are composed of two types: a first ferrite core 30A having a high removal effect for the noise component in the FM frequency band and a second ferrite core 30B having a high removal effect for the noise component in the AM frequency band. . The first ferrite core 30A is made of Ni—Zn ferrite, and the second ferrite core 30B is made of Mn—Zn ferrite. Further, as shown in FIG. 1, the first and second ferrite cores 30A and 30B both have a circular annular shape, and the tab terminal portions 22A and 22B can penetrate through the press-fit state on the central axis. Thus, the through hole 30H is opened. The first and second ferrite cores 30A and 30B are coated with a resin coating (not shown) on the entire surface to prevent the ferrite cores 30A and 30B from being damaged when mounted on the tab terminal portions 22A and 22B. ing.

  Next, an example of a procedure for fitting the ferrite cores 30A and 30B into the bus bar terminal 20 will be described. First, the second and fourth tab terminal portions 23A from the right in FIG. 1 on the positive electrode side terminal 22A (upper stage) side are passed through the through holes 30H of the first ferrite core 30A, and the first ferrite core 30A contacts the base portion 23. Fit until touching. Further, in the same procedure, the negative terminal 22B (lower stage) side is also fitted to the first and third tab terminal portions 23B from the right in FIG. 1 until the first ferrite core 30A comes into contact with the base portion 23. Next, in FIG. 1 on the positive electrode side terminal 22A (upper stage) side, the first and third tab terminal portions 23A from the right are fitted to the first ferrite core 30A in which the second ferrite core 30B is first fitted. Come on. Further, the negative terminal 22B (lower stage) side is also fitted until it comes into contact with the first ferrite core 30A in which the second ferrite core 30B is first fitted into the second and fourth tab terminal portions 23B from the right in FIG. Come on. As described above, the interval L between the tab terminal portions 22 is set to be smaller than twice the radius R of the ferrite cores 30A and 30B. Therefore, as shown in FIGS. The second ferrite cores 30B adjacent to each other come into contact with each other in a state shifted in the front-rear direction, and wrap in the arrangement direction of the tab terminal portions 22A and 22B (wrap length L ′ = 2R−L).

  Next, the circuit unit 40 is inserted into a mold (not shown). Thereafter, if the resin molding is performed so that the circuit unit 40 is completely surrounded by the resin, the manufacture of the connector 10 is completed. When the manufacturing is completed, the front side of the tab terminal portions 22 </ b> A and 22 </ b> B protrudes into the hood portion 12 of the connector housing 11. The base portion 23 of the bus bar terminal 20 and the rear side of the tab terminal portions 22A and 22B to which the ferrite cores 30A and 30B are attached are accommodated in the hood portion 12 in a resin-molded state.

  The operation of the first embodiment will be described. A signal current including a noise component input to the positive electrode side terminal 23A of the connector 10 passes through the first ferrite core 30A and the second ferrite core 30B, and thus in the FM and AM frequency bands. Noise current is removed. Only a clear signal current is output from the negative terminal 23B.

  Next, the effect of Example 1 is demonstrated.

  According to the present embodiment, the ferrite cores 30A and 30B are fitted in the tab terminal portions 22A and 22B of the bus bar terminal 20, and the ferrite cores 30A and 30B adjacent in the arrangement direction of the tab terminal portions 22A and 22B are: The tab terminal portions 22A and 22B are arranged so as to wrap with respect to the arrangement direction of the tab terminal portions 22A and 22B. Therefore, since the interval between the tab terminal portions 22A and 22B can be shortened (narrow pitch) by the wrap length of the adjacent ferrite cores 30A and 30B, the ferrite core built-in connector 10 can be miniaturized.

  Further, two types of ferrite cores (first and second ferrite cores) 30A having different frequency bands of noise components that can be removed in a conduction path from the positive electrode side terminal 22A as the input unit to the negative electrode side terminal 22B as the output unit. , 30B, the noise removal characteristics of the ferrite core built-in connector 10 are further improved.

  Moreover, since the highly versatile circular annular ferrite core is used for the ferrite cores 30A and 30B, dedicated ferrite is not required. Therefore, it is possible to reduce the component manufacturing cost.

<Example 2>
In the first embodiment, the ferrite core built-in connector 10 in which four positive and negative terminals 22A and 22B are connected by the base 23 and electrically connected is illustrated. However, in the second embodiment, as shown in FIG. The base 23 between the terminals was cut off, and the four pairs of positive and negative terminals 22A and 22B were made electrically independent. According to the second embodiment, the same effect as the first embodiment can be obtained.

  As described above, according to the present invention, the ferrite cores 30A and 30B are fitted in the tab terminal portions 22A and 22B of the terminal fitting 20, and the ferrite cores 30A and 30B adjacent in the arrangement direction of the tab terminal portions 22A and 22B are The fitting direction is shifted in the front-rear direction, and the tab terminal portions 22A and 22B are arranged so as to wrap. Therefore, since the distance between the tab terminal portions 22A and 22B can be shortened (narrow pitch) by the wrap length, the ferrite core built-in connector 10 can be miniaturized.

<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-described embodiment, the ferrite core is a circular ring shape, but is not limited thereto, and may be an elliptical ring shape or a square ring shape.
(2) In the above embodiment, two types of ferrite cores were used: a first ferrite core made of a Ni—Zn ferrite material and a second ferrite core made of a Mn—Zn ferrite material. Not limited to any one of the two types.
(3) In the above embodiment, two types of ferrite cores, the first and second ferrite cores, are used. However, the present invention is not limited to this, and three or more types of ferrite cores having different frequency bands where noise can be removed may be used.
(4) In the above-described embodiment, one ferrite core is fitted in each tab terminal portion. However, the present invention is not limited to this, and two or more ferrite cores may be fitted in each tab terminal portion.
(5) Although the bus bar terminal is used in the above embodiment, a terminal fitting connected to the electric wire may be used.
(6) In the above-described embodiment, the number of poles of the tab terminal portion of the terminal fitting is set to 8. However, the number of poles of the terminal portion is not limited to this.
(7) In the above embodiment, the tab terminal portion is provided in two upper and lower stages. However, the present invention is not limited to this, and one or more stages may be provided.
(8) In the above embodiment, the Ni—Zn ferrite material and the Mn—Zn ferrite material are used for the ferrite core, but the present invention is not limited to this, and the ferrite core material is not limited. Moreover, even if it is the same material, you may use a crystalline nanocrystal material instead of ceramic form.
(9) In the above embodiment, the ferrite core built-in connector has a joint function. However, the present invention is not limited to this, and the joint function may not be provided.

10 ... Ferrite core built-in connector 11 ... Connector housing 20 ... Bus bar terminal (terminal fitting)
22A ... Tab terminal part (input part)
22B ... Tab terminal part (output part)
23: Base 30A, 30B: First and second ferrite cores (ferrite cores)

Claims (2)

Terminal fittings,
An annular ferrite core;
A ferrite core built-in connector comprising a connector housing that accommodates the terminal fitting and the ferrite core and is fitted to a mating connector,
The terminal fitting includes a plurality of tab terminal portions that extend in the fitting direction and serve as input / output portions, and a base portion that connects the tab terminal portions,
At least one ferrite core is fitted in the plurality of tab terminal portions,
The ferrite cores adjacent to each other in the direction in which the tab terminal portions are arranged are arranged so as to be shifted back and forth with respect to the fitting direction, and are arranged so as to wrap in the direction in which the tab terminal portions are arranged. Ferrite core built-in connector.   The ferrite cores fitted in the tab terminal part serving as the input part and the other ferrite cores fitted into the tab terminal part serving as the output part have a frequency band of removable noise components. The ferrite core built-in connector according to claim 1, wherein the connectors are different.

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